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qemu / qemu / df4de1affc440d6f2cdaeea329b90c0b88ece5a1 / . / target / arm / helper.c
blob: b19c7ace7852ac72c71d4668190acb7c9d466076 [file] [log] [blame]
#include "qemu/osdep.h"
#include "target/arm/idau.h"
#include "trace.h"
#include "cpu.h"
#include "internals.h"
#include "exec/gdbstub.h"
#include "exec/helper-proto.h"
#include "qemu/host-utils.h"
#include "sysemu/arch_init.h"
#include "sysemu/sysemu.h"
#include "qemu/bitops.h"
#include "qemu/crc32c.h"
#include "exec/exec-all.h"
#include "exec/cpu_ldst.h"
#include "arm_ldst.h"
#include <zlib.h> /* For crc32 */
#include "exec/semihost.h"
#include "sysemu/kvm.h"
#include "fpu/softfloat.h"
#define ARM_CPU_FREQ 1000000000 /* FIXME: 1 GHz, should be configurable */
#ifndef CONFIG_USER_ONLY
/* Cacheability and shareability attributes for a memory access */
typedef struct ARMCacheAttrs {
unsigned int attrs:8; /* as in the MAIR register encoding */
unsigned int shareability:2; /* as in the SH field of the VMSAv8-64 PTEs */
} ARMCacheAttrs;
static bool get_phys_addr(CPUARMState *env, target_ulong address,
MMUAccessType access_type, ARMMMUIdx mmu_idx,
hwaddr *phys_ptr, MemTxAttrs *attrs, int *prot,
target_ulong *page_size,
ARMMMUFaultInfo *fi, ARMCacheAttrs *cacheattrs);
static bool get_phys_addr_lpae(CPUARMState *env, target_ulong address,
MMUAccessType access_type, ARMMMUIdx mmu_idx,
hwaddr *phys_ptr, MemTxAttrs *txattrs, int *prot,
target_ulong *page_size_ptr,
ARMMMUFaultInfo *fi, ARMCacheAttrs *cacheattrs);
/* Security attributes for an address, as returned by v8m_security_lookup. */
typedef struct V8M_SAttributes {
bool subpage; /* true if these attrs don't cover the whole TARGET_PAGE */
bool ns;
bool nsc;
uint8_t sregion;
bool srvalid;
uint8_t iregion;
bool irvalid;
} V8M_SAttributes;
static void v8m_security_lookup(CPUARMState *env, uint32_t address,
MMUAccessType access_type, ARMMMUIdx mmu_idx,
V8M_SAttributes *sattrs);
#endif
static int vfp_gdb_get_reg(CPUARMState *env, uint8_t *buf, int reg)
{
int nregs;
/* VFP data registers are always little-endian. */
nregs = arm_feature(env, ARM_FEATURE_VFP3) ? 32 : 16;
if (reg < nregs) {
stq_le_p(buf, *aa32_vfp_dreg(env, reg));
return 8;
}
if (arm_feature(env, ARM_FEATURE_NEON)) {
/* Aliases for Q regs. */
nregs += 16;
if (reg < nregs) {
uint64_t *q = aa32_vfp_qreg(env, reg - 32);
stq_le_p(buf, q[0]);
stq_le_p(buf + 8, q[1]);
return 16;
}
}
switch (reg - nregs) {
case 0: stl_p(buf, env->vfp.xregs[ARM_VFP_FPSID]); return 4;
case 1: stl_p(buf, env->vfp.xregs[ARM_VFP_FPSCR]); return 4;
case 2: stl_p(buf, env->vfp.xregs[ARM_VFP_FPEXC]); return 4;
}
return 0;
}
static int vfp_gdb_set_reg(CPUARMState *env, uint8_t *buf, int reg)
{
int nregs;
nregs = arm_feature(env, ARM_FEATURE_VFP3) ? 32 : 16;
if (reg < nregs) {
*aa32_vfp_dreg(env, reg) = ldq_le_p(buf);
return 8;
}
if (arm_feature(env, ARM_FEATURE_NEON)) {
nregs += 16;
if (reg < nregs) {
uint64_t *q = aa32_vfp_qreg(env, reg - 32);
q[0] = ldq_le_p(buf);
q[1] = ldq_le_p(buf + 8);
return 16;
}
}
switch (reg - nregs) {
case 0: env->vfp.xregs[ARM_VFP_FPSID] = ldl_p(buf); return 4;
case 1: env->vfp.xregs[ARM_VFP_FPSCR] = ldl_p(buf); return 4;
case 2: env->vfp.xregs[ARM_VFP_FPEXC] = ldl_p(buf) & (1 << 30); return 4;
}
return 0;
}
static int aarch64_fpu_gdb_get_reg(CPUARMState *env, uint8_t *buf, int reg)
{
switch (reg) {
case 0 ... 31:
/* 128 bit FP register */
{
uint64_t *q = aa64_vfp_qreg(env, reg);
stq_le_p(buf, q[0]);
stq_le_p(buf + 8, q[1]);
return 16;
}
case 32:
/* FPSR */
stl_p(buf, vfp_get_fpsr(env));
return 4;
case 33:
/* FPCR */
stl_p(buf, vfp_get_fpcr(env));
return 4;
default:
return 0;
}
}
static int aarch64_fpu_gdb_set_reg(CPUARMState *env, uint8_t *buf, int reg)
{
switch (reg) {
case 0 ... 31:
/* 128 bit FP register */
{
uint64_t *q = aa64_vfp_qreg(env, reg);
q[0] = ldq_le_p(buf);
q[1] = ldq_le_p(buf + 8);
return 16;
}
case 32:
/* FPSR */
vfp_set_fpsr(env, ldl_p(buf));
return 4;
case 33:
/* FPCR */
vfp_set_fpcr(env, ldl_p(buf));
return 4;
default:
return 0;
}
}
static uint64_t raw_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
assert(ri->fieldoffset);
if (cpreg_field_is_64bit(ri)) {
return CPREG_FIELD64(env, ri);
} else {
return CPREG_FIELD32(env, ri);
}
}
static void raw_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
assert(ri->fieldoffset);
if (cpreg_field_is_64bit(ri)) {
CPREG_FIELD64(env, ri) = value;
} else {
CPREG_FIELD32(env, ri) = value;
}
}
static void *raw_ptr(CPUARMState *env, const ARMCPRegInfo *ri)
{
return (char *)env + ri->fieldoffset;
}
uint64_t read_raw_cp_reg(CPUARMState *env, const ARMCPRegInfo *ri)
{
/* Raw read of a coprocessor register (as needed for migration, etc). */
if (ri->type & ARM_CP_CONST) {
return ri->resetvalue;
} else if (ri->raw_readfn) {
return ri->raw_readfn(env, ri);
} else if (ri->readfn) {
return ri->readfn(env, ri);
} else {
return raw_read(env, ri);
}
}
static void write_raw_cp_reg(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t v)
{
/* Raw write of a coprocessor register (as needed for migration, etc).
* Note that constant registers are treated as write-ignored; the
* caller should check for success by whether a readback gives the
* value written.
*/
if (ri->type & ARM_CP_CONST) {
return;
} else if (ri->raw_writefn) {
ri->raw_writefn(env, ri, v);
} else if (ri->writefn) {
ri->writefn(env, ri, v);
} else {
raw_write(env, ri, v);
}
}
static int arm_gdb_get_sysreg(CPUARMState *env, uint8_t *buf, int reg)
{
ARMCPU *cpu = arm_env_get_cpu(env);
const ARMCPRegInfo *ri;
uint32_t key;
key = cpu->dyn_xml.cpregs_keys[reg];
ri = get_arm_cp_reginfo(cpu->cp_regs, key);
if (ri) {
if (cpreg_field_is_64bit(ri)) {
return gdb_get_reg64(buf, (uint64_t)read_raw_cp_reg(env, ri));
} else {
return gdb_get_reg32(buf, (uint32_t)read_raw_cp_reg(env, ri));
}
}
return 0;
}
static int arm_gdb_set_sysreg(CPUARMState *env, uint8_t *buf, int reg)
{
return 0;
}
static bool raw_accessors_invalid(const ARMCPRegInfo *ri)
{
/* Return true if the regdef would cause an assertion if you called
* read_raw_cp_reg() or write_raw_cp_reg() on it (ie if it is a
* program bug for it not to have the NO_RAW flag).
* NB that returning false here doesn't necessarily mean that calling
* read/write_raw_cp_reg() is safe, because we can't distinguish "has
* read/write access functions which are safe for raw use" from "has
* read/write access functions which have side effects but has forgotten
* to provide raw access functions".
* The tests here line up with the conditions in read/write_raw_cp_reg()
* and assertions in raw_read()/raw_write().
*/
if ((ri->type & ARM_CP_CONST) ||
ri->fieldoffset ||
((ri->raw_writefn || ri->writefn) && (ri->raw_readfn || ri->readfn))) {
return false;
}
return true;
}
bool write_cpustate_to_list(ARMCPU *cpu)
{
/* Write the coprocessor state from cpu->env to the (index,value) list. */
int i;
bool ok = true;
for (i = 0; i < cpu->cpreg_array_len; i++) {
uint32_t regidx = kvm_to_cpreg_id(cpu->cpreg_indexes[i]);
const ARMCPRegInfo *ri;
ri = get_arm_cp_reginfo(cpu->cp_regs, regidx);
if (!ri) {
ok = false;
continue;
}
if (ri->type & ARM_CP_NO_RAW) {
continue;
}
cpu->cpreg_values[i] = read_raw_cp_reg(&cpu->env, ri);
}
return ok;
}
bool write_list_to_cpustate(ARMCPU *cpu)
{
int i;
bool ok = true;
for (i = 0; i < cpu->cpreg_array_len; i++) {
uint32_t regidx = kvm_to_cpreg_id(cpu->cpreg_indexes[i]);
uint64_t v = cpu->cpreg_values[i];
const ARMCPRegInfo *ri;
ri = get_arm_cp_reginfo(cpu->cp_regs, regidx);
if (!ri) {
ok = false;
continue;
}
if (ri->type & ARM_CP_NO_RAW) {
continue;
}
/* Write value and confirm it reads back as written
* (to catch read-only registers and partially read-only
* registers where the incoming migration value doesn't match)
*/
write_raw_cp_reg(&cpu->env, ri, v);
if (read_raw_cp_reg(&cpu->env, ri) != v) {
ok = false;
}
}
return ok;
}
static void add_cpreg_to_list(gpointer key, gpointer opaque)
{
ARMCPU *cpu = opaque;
uint64_t regidx;
const ARMCPRegInfo *ri;
regidx = *(uint32_t *)key;
ri = get_arm_cp_reginfo(cpu->cp_regs, regidx);
if (!(ri->type & (ARM_CP_NO_RAW|ARM_CP_ALIAS))) {
cpu->cpreg_indexes[cpu->cpreg_array_len] = cpreg_to_kvm_id(regidx);
/* The value array need not be initialized at this point */
cpu->cpreg_array_len++;
}
}
static void count_cpreg(gpointer key, gpointer opaque)
{
ARMCPU *cpu = opaque;
uint64_t regidx;
const ARMCPRegInfo *ri;
regidx = *(uint32_t *)key;
ri = get_arm_cp_reginfo(cpu->cp_regs, regidx);
if (!(ri->type & (ARM_CP_NO_RAW|ARM_CP_ALIAS))) {
cpu->cpreg_array_len++;
}
}
static gint cpreg_key_compare(gconstpointer a, gconstpointer b)
{
uint64_t aidx = cpreg_to_kvm_id(*(uint32_t *)a);
uint64_t bidx = cpreg_to_kvm_id(*(uint32_t *)b);
if (aidx > bidx) {
return 1;
}
if (aidx < bidx) {
return -1;
}
return 0;
}
void init_cpreg_list(ARMCPU *cpu)
{
/* Initialise the cpreg_tuples[] array based on the cp_regs hash.
* Note that we require cpreg_tuples[] to be sorted by key ID.
*/
GList *keys;
int arraylen;
keys = g_hash_table_get_keys(cpu->cp_regs);
keys = g_list_sort(keys, cpreg_key_compare);
cpu->cpreg_array_len = 0;
g_list_foreach(keys, count_cpreg, cpu);
arraylen = cpu->cpreg_array_len;
cpu->cpreg_indexes = g_new(uint64_t, arraylen);
cpu->cpreg_values = g_new(uint64_t, arraylen);
cpu->cpreg_vmstate_indexes = g_new(uint64_t, arraylen);
cpu->cpreg_vmstate_values = g_new(uint64_t, arraylen);
cpu->cpreg_vmstate_array_len = cpu->cpreg_array_len;
cpu->cpreg_array_len = 0;
g_list_foreach(keys, add_cpreg_to_list, cpu);
assert(cpu->cpreg_array_len == arraylen);
g_list_free(keys);
}
/*
* Some registers are not accessible if EL3.NS=0 and EL3 is using AArch32 but
* they are accessible when EL3 is using AArch64 regardless of EL3.NS.
*
* access_el3_aa32ns: Used to check AArch32 register views.
* access_el3_aa32ns_aa64any: Used to check both AArch32/64 register views.
*/
static CPAccessResult access_el3_aa32ns(CPUARMState *env,
const ARMCPRegInfo *ri,
bool isread)
{
bool secure = arm_is_secure_below_el3(env);
assert(!arm_el_is_aa64(env, 3));
if (secure) {
return CP_ACCESS_TRAP_UNCATEGORIZED;
}
return CP_ACCESS_OK;
}
static CPAccessResult access_el3_aa32ns_aa64any(CPUARMState *env,
const ARMCPRegInfo *ri,
bool isread)
{
if (!arm_el_is_aa64(env, 3)) {
return access_el3_aa32ns(env, ri, isread);
}
return CP_ACCESS_OK;
}
/* Some secure-only AArch32 registers trap to EL3 if used from
* Secure EL1 (but are just ordinary UNDEF in other non-EL3 contexts).
* Note that an access from Secure EL1 can only happen if EL3 is AArch64.
* We assume that the .access field is set to PL1_RW.
*/
static CPAccessResult access_trap_aa32s_el1(CPUARMState *env,
const ARMCPRegInfo *ri,
bool isread)
{
if (arm_current_el(env) == 3) {
return CP_ACCESS_OK;
}
if (arm_is_secure_below_el3(env)) {
return CP_ACCESS_TRAP_EL3;
}
/* This will be EL1 NS and EL2 NS, which just UNDEF */
return CP_ACCESS_TRAP_UNCATEGORIZED;
}
/* Check for traps to "powerdown debug" registers, which are controlled
* by MDCR.TDOSA
*/
static CPAccessResult access_tdosa(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
int el = arm_current_el(env);
if (el < 2 && (env->cp15.mdcr_el2 & MDCR_TDOSA)
&& !arm_is_secure_below_el3(env)) {
return CP_ACCESS_TRAP_EL2;
}
if (el < 3 && (env->cp15.mdcr_el3 & MDCR_TDOSA)) {
return CP_ACCESS_TRAP_EL3;
}
return CP_ACCESS_OK;
}
/* Check for traps to "debug ROM" registers, which are controlled
* by MDCR_EL2.TDRA for EL2 but by the more general MDCR_EL3.TDA for EL3.
*/
static CPAccessResult access_tdra(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
int el = arm_current_el(env);
if (el < 2 && (env->cp15.mdcr_el2 & MDCR_TDRA)
&& !arm_is_secure_below_el3(env)) {
return CP_ACCESS_TRAP_EL2;
}
if (el < 3 && (env->cp15.mdcr_el3 & MDCR_TDA)) {
return CP_ACCESS_TRAP_EL3;
}
return CP_ACCESS_OK;
}
/* Check for traps to general debug registers, which are controlled
* by MDCR_EL2.TDA for EL2 and MDCR_EL3.TDA for EL3.
*/
static CPAccessResult access_tda(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
int el = arm_current_el(env);
if (el < 2 && (env->cp15.mdcr_el2 & MDCR_TDA)
&& !arm_is_secure_below_el3(env)) {
return CP_ACCESS_TRAP_EL2;
}
if (el < 3 && (env->cp15.mdcr_el3 & MDCR_TDA)) {
return CP_ACCESS_TRAP_EL3;
}
return CP_ACCESS_OK;
}
/* Check for traps to performance monitor registers, which are controlled
* by MDCR_EL2.TPM for EL2 and MDCR_EL3.TPM for EL3.
*/
static CPAccessResult access_tpm(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
int el = arm_current_el(env);
if (el < 2 && (env->cp15.mdcr_el2 & MDCR_TPM)
&& !arm_is_secure_below_el3(env)) {
return CP_ACCESS_TRAP_EL2;
}
if (el < 3 && (env->cp15.mdcr_el3 & MDCR_TPM)) {
return CP_ACCESS_TRAP_EL3;
}
return CP_ACCESS_OK;
}
static void dacr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
{
ARMCPU *cpu = arm_env_get_cpu(env);
raw_write(env, ri, value);
tlb_flush(CPU(cpu)); /* Flush TLB as domain not tracked in TLB */
}
static void fcse_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
{
ARMCPU *cpu = arm_env_get_cpu(env);
if (raw_read(env, ri) != value) {
/* Unlike real hardware the qemu TLB uses virtual addresses,
* not modified virtual addresses, so this causes a TLB flush.
*/
tlb_flush(CPU(cpu));
raw_write(env, ri, value);
}
}
static void contextidr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
ARMCPU *cpu = arm_env_get_cpu(env);
if (raw_read(env, ri) != value && !arm_feature(env, ARM_FEATURE_PMSA)
&& !extended_addresses_enabled(env)) {
/* For VMSA (when not using the LPAE long descriptor page table
* format) this register includes the ASID, so do a TLB flush.
* For PMSA it is purely a process ID and no action is needed.
*/
tlb_flush(CPU(cpu));
}
raw_write(env, ri, value);
}
static void tlbiall_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* Invalidate all (TLBIALL) */
ARMCPU *cpu = arm_env_get_cpu(env);
tlb_flush(CPU(cpu));
}
static void tlbimva_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* Invalidate single TLB entry by MVA and ASID (TLBIMVA) */
ARMCPU *cpu = arm_env_get_cpu(env);
tlb_flush_page(CPU(cpu), value & TARGET_PAGE_MASK);
}
static void tlbiasid_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* Invalidate by ASID (TLBIASID) */
ARMCPU *cpu = arm_env_get_cpu(env);
tlb_flush(CPU(cpu));
}
static void tlbimvaa_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* Invalidate single entry by MVA, all ASIDs (TLBIMVAA) */
ARMCPU *cpu = arm_env_get_cpu(env);
tlb_flush_page(CPU(cpu), value & TARGET_PAGE_MASK);
}
/* IS variants of TLB operations must affect all cores */
static void tlbiall_is_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = ENV_GET_CPU(env);
tlb_flush_all_cpus_synced(cs);
}
static void tlbiasid_is_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = ENV_GET_CPU(env);
tlb_flush_all_cpus_synced(cs);
}
static void tlbimva_is_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = ENV_GET_CPU(env);
tlb_flush_page_all_cpus_synced(cs, value & TARGET_PAGE_MASK);
}
static void tlbimvaa_is_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = ENV_GET_CPU(env);
tlb_flush_page_all_cpus_synced(cs, value & TARGET_PAGE_MASK);
}
static void tlbiall_nsnh_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = ENV_GET_CPU(env);
tlb_flush_by_mmuidx(cs,
ARMMMUIdxBit_S12NSE1 |
ARMMMUIdxBit_S12NSE0 |
ARMMMUIdxBit_S2NS);
}
static void tlbiall_nsnh_is_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = ENV_GET_CPU(env);
tlb_flush_by_mmuidx_all_cpus_synced(cs,
ARMMMUIdxBit_S12NSE1 |
ARMMMUIdxBit_S12NSE0 |
ARMMMUIdxBit_S2NS);
}
static void tlbiipas2_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* Invalidate by IPA. This has to invalidate any structures that
* contain only stage 2 translation information, but does not need
* to apply to structures that contain combined stage 1 and stage 2
* translation information.
* This must NOP if EL2 isn't implemented or SCR_EL3.NS is zero.
*/
CPUState *cs = ENV_GET_CPU(env);
uint64_t pageaddr;
if (!arm_feature(env, ARM_FEATURE_EL2) || !(env->cp15.scr_el3 & SCR_NS)) {
return;
}
pageaddr = sextract64(value << 12, 0, 40);
tlb_flush_page_by_mmuidx(cs, pageaddr, ARMMMUIdxBit_S2NS);
}
static void tlbiipas2_is_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = ENV_GET_CPU(env);
uint64_t pageaddr;
if (!arm_feature(env, ARM_FEATURE_EL2) || !(env->cp15.scr_el3 & SCR_NS)) {
return;
}
pageaddr = sextract64(value << 12, 0, 40);
tlb_flush_page_by_mmuidx_all_cpus_synced(cs, pageaddr,
ARMMMUIdxBit_S2NS);
}
static void tlbiall_hyp_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = ENV_GET_CPU(env);
tlb_flush_by_mmuidx(cs, ARMMMUIdxBit_S1E2);
}
static void tlbiall_hyp_is_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = ENV_GET_CPU(env);
tlb_flush_by_mmuidx_all_cpus_synced(cs, ARMMMUIdxBit_S1E2);
}
static void tlbimva_hyp_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = ENV_GET_CPU(env);
uint64_t pageaddr = value & ~MAKE_64BIT_MASK(0, 12);
tlb_flush_page_by_mmuidx(cs, pageaddr, ARMMMUIdxBit_S1E2);
}
static void tlbimva_hyp_is_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = ENV_GET_CPU(env);
uint64_t pageaddr = value & ~MAKE_64BIT_MASK(0, 12);
tlb_flush_page_by_mmuidx_all_cpus_synced(cs, pageaddr,
ARMMMUIdxBit_S1E2);
}
static const ARMCPRegInfo cp_reginfo[] = {
/* Define the secure and non-secure FCSE identifier CP registers
* separately because there is no secure bank in V8 (no _EL3). This allows
* the secure register to be properly reset and migrated. There is also no
* v8 EL1 version of the register so the non-secure instance stands alone.
*/
{ .name = "FCSEIDR",
.cp = 15, .opc1 = 0, .crn = 13, .crm = 0, .opc2 = 0,
.access = PL1_RW, .secure = ARM_CP_SECSTATE_NS,
.fieldoffset = offsetof(CPUARMState, cp15.fcseidr_ns),
.resetvalue = 0, .writefn = fcse_write, .raw_writefn = raw_write, },
{ .name = "FCSEIDR_S",
.cp = 15, .opc1 = 0, .crn = 13, .crm = 0, .opc2 = 0,
.access = PL1_RW, .secure = ARM_CP_SECSTATE_S,
.fieldoffset = offsetof(CPUARMState, cp15.fcseidr_s),
.resetvalue = 0, .writefn = fcse_write, .raw_writefn = raw_write, },
/* Define the secure and non-secure context identifier CP registers
* separately because there is no secure bank in V8 (no _EL3). This allows
* the secure register to be properly reset and migrated. In the
* non-secure case, the 32-bit register will have reset and migration
* disabled during registration as it is handled by the 64-bit instance.
*/
{ .name = "CONTEXTIDR_EL1", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 13, .crm = 0, .opc2 = 1,
.access = PL1_RW, .secure = ARM_CP_SECSTATE_NS,
.fieldoffset = offsetof(CPUARMState, cp15.contextidr_el[1]),
.resetvalue = 0, .writefn = contextidr_write, .raw_writefn = raw_write, },
{ .name = "CONTEXTIDR_S", .state = ARM_CP_STATE_AA32,
.cp = 15, .opc1 = 0, .crn = 13, .crm = 0, .opc2 = 1,
.access = PL1_RW, .secure = ARM_CP_SECSTATE_S,
.fieldoffset = offsetof(CPUARMState, cp15.contextidr_s),
.resetvalue = 0, .writefn = contextidr_write, .raw_writefn = raw_write, },
REGINFO_SENTINEL
};
static const ARMCPRegInfo not_v8_cp_reginfo[] = {
/* NB: Some of these registers exist in v8 but with more precise
* definitions that don't use CP_ANY wildcards (mostly in v8_cp_reginfo[]).
*/
/* MMU Domain access control / MPU write buffer control */
{ .name = "DACR",
.cp = 15, .opc1 = CP_ANY, .crn = 3, .crm = CP_ANY, .opc2 = CP_ANY,
.access = PL1_RW, .resetvalue = 0,
.writefn = dacr_write, .raw_writefn = raw_write,
.bank_fieldoffsets = { offsetoflow32(CPUARMState, cp15.dacr_s),
offsetoflow32(CPUARMState, cp15.dacr_ns) } },
/* ARMv7 allocates a range of implementation defined TLB LOCKDOWN regs.
* For v6 and v5, these mappings are overly broad.
*/
{ .name = "TLB_LOCKDOWN", .cp = 15, .crn = 10, .crm = 0,
.opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, .type = ARM_CP_NOP },
{ .name = "TLB_LOCKDOWN", .cp = 15, .crn = 10, .crm = 1,
.opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, .type = ARM_CP_NOP },
{ .name = "TLB_LOCKDOWN", .cp = 15, .crn = 10, .crm = 4,
.opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, .type = ARM_CP_NOP },
{ .name = "TLB_LOCKDOWN", .cp = 15, .crn = 10, .crm = 8,
.opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, .type = ARM_CP_NOP },
/* Cache maintenance ops; some of this space may be overridden later. */
{ .name = "CACHEMAINT", .cp = 15, .crn = 7, .crm = CP_ANY,
.opc1 = 0, .opc2 = CP_ANY, .access = PL1_W,
.type = ARM_CP_NOP | ARM_CP_OVERRIDE },
REGINFO_SENTINEL
};
static const ARMCPRegInfo not_v6_cp_reginfo[] = {
/* Not all pre-v6 cores implemented this WFI, so this is slightly
* over-broad.
*/
{ .name = "WFI_v5", .cp = 15, .crn = 7, .crm = 8, .opc1 = 0, .opc2 = 2,
.access = PL1_W, .type = ARM_CP_WFI },
REGINFO_SENTINEL
};
static const ARMCPRegInfo not_v7_cp_reginfo[] = {
/* Standard v6 WFI (also used in some pre-v6 cores); not in v7 (which
* is UNPREDICTABLE; we choose to NOP as most implementations do).
*/
{ .name = "WFI_v6", .cp = 15, .crn = 7, .crm = 0, .opc1 = 0, .opc2 = 4,
.access = PL1_W, .type = ARM_CP_WFI },
/* L1 cache lockdown. Not architectural in v6 and earlier but in practice
* implemented in 926, 946, 1026, 1136, 1176 and 11MPCore. StrongARM and
* OMAPCP will override this space.
*/
{ .name = "DLOCKDOWN", .cp = 15, .crn = 9, .crm = 0, .opc1 = 0, .opc2 = 0,
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_data),
.resetvalue = 0 },
{ .name = "ILOCKDOWN", .cp = 15, .crn = 9, .crm = 0, .opc1 = 0, .opc2 = 1,
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_insn),
.resetvalue = 0 },
/* v6 doesn't have the cache ID registers but Linux reads them anyway */
{ .name = "DUMMY", .cp = 15, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = CP_ANY,
.access = PL1_R, .type = ARM_CP_CONST | ARM_CP_NO_RAW,
.resetvalue = 0 },
/* We don't implement pre-v7 debug but most CPUs had at least a DBGDIDR;
* implementing it as RAZ means the "debug architecture version" bits
* will read as a reserved value, which should cause Linux to not try
* to use the debug hardware.
*/
{ .name = "DBGDIDR", .cp = 14, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 0,
.access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 },
/* MMU TLB control. Note that the wildcarding means we cover not just
* the unified TLB ops but also the dside/iside/inner-shareable variants.
*/
{ .name = "TLBIALL", .cp = 15, .crn = 8, .crm = CP_ANY,
.opc1 = CP_ANY, .opc2 = 0, .access = PL1_W, .writefn = tlbiall_write,
.type = ARM_CP_NO_RAW },
{ .name = "TLBIMVA", .cp = 15, .crn = 8, .crm = CP_ANY,
.opc1 = CP_ANY, .opc2 = 1, .access = PL1_W, .writefn = tlbimva_write,
.type = ARM_CP_NO_RAW },
{ .name = "TLBIASID", .cp = 15, .crn = 8, .crm = CP_ANY,
.opc1 = CP_ANY, .opc2 = 2, .access = PL1_W, .writefn = tlbiasid_write,
.type = ARM_CP_NO_RAW },
{ .name = "TLBIMVAA", .cp = 15, .crn = 8, .crm = CP_ANY,
.opc1 = CP_ANY, .opc2 = 3, .access = PL1_W, .writefn = tlbimvaa_write,
.type = ARM_CP_NO_RAW },
{ .name = "PRRR", .cp = 15, .crn = 10, .crm = 2,
.opc1 = 0, .opc2 = 0, .access = PL1_RW, .type = ARM_CP_NOP },
{ .name = "NMRR", .cp = 15, .crn = 10, .crm = 2,
.opc1 = 0, .opc2 = 1, .access = PL1_RW, .type = ARM_CP_NOP },
REGINFO_SENTINEL
};
static void cpacr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
uint32_t mask = 0;
/* In ARMv8 most bits of CPACR_EL1 are RES0. */
if (!arm_feature(env, ARM_FEATURE_V8)) {
/* ARMv7 defines bits for unimplemented coprocessors as RAZ/WI.
* ASEDIS [31] and D32DIS [30] are both UNK/SBZP without VFP.
* TRCDIS [28] is RAZ/WI since we do not implement a trace macrocell.
*/
if (arm_feature(env, ARM_FEATURE_VFP)) {
/* VFP coprocessor: cp10 & cp11 [23:20] */
mask |= (1 << 31) | (1 << 30) | (0xf << 20);
if (!arm_feature(env, ARM_FEATURE_NEON)) {
/* ASEDIS [31] bit is RAO/WI */
value |= (1 << 31);
}
/* VFPv3 and upwards with NEON implement 32 double precision
* registers (D0-D31).
*/
if (!arm_feature(env, ARM_FEATURE_NEON) ||
!arm_feature(env, ARM_FEATURE_VFP3)) {
/* D32DIS [30] is RAO/WI if D16-31 are not implemented. */
value |= (1 << 30);
}
}
value &= mask;
}
env->cp15.cpacr_el1 = value;
}
static void cpacr_reset(CPUARMState *env, const ARMCPRegInfo *ri)
{
/* Call cpacr_write() so that we reset with the correct RAO bits set
* for our CPU features.
*/
cpacr_write(env, ri, 0);
}
static CPAccessResult cpacr_access(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
if (arm_feature(env, ARM_FEATURE_V8)) {
/* Check if CPACR accesses are to be trapped to EL2 */
if (arm_current_el(env) == 1 &&
(env->cp15.cptr_el[2] & CPTR_TCPAC) && !arm_is_secure(env)) {
return CP_ACCESS_TRAP_EL2;
/* Check if CPACR accesses are to be trapped to EL3 */
} else if (arm_current_el(env) < 3 &&
(env->cp15.cptr_el[3] & CPTR_TCPAC)) {
return CP_ACCESS_TRAP_EL3;
}
}
return CP_ACCESS_OK;
}
static CPAccessResult cptr_access(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
/* Check if CPTR accesses are set to trap to EL3 */
if (arm_current_el(env) == 2 && (env->cp15.cptr_el[3] & CPTR_TCPAC)) {
return CP_ACCESS_TRAP_EL3;
}
return CP_ACCESS_OK;
}
static const ARMCPRegInfo v6_cp_reginfo[] = {
/* prefetch by MVA in v6, NOP in v7 */
{ .name = "MVA_prefetch",
.cp = 15, .crn = 7, .crm = 13, .opc1 = 0, .opc2 = 1,
.access = PL1_W, .type = ARM_CP_NOP },
/* We need to break the TB after ISB to execute self-modifying code
* correctly and also to take any pending interrupts immediately.
* So use arm_cp_write_ignore() function instead of ARM_CP_NOP flag.
*/
{ .name = "ISB", .cp = 15, .crn = 7, .crm = 5, .opc1 = 0, .opc2 = 4,
.access = PL0_W, .type = ARM_CP_NO_RAW, .writefn = arm_cp_write_ignore },
{ .name = "DSB", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 4,
.access = PL0_W, .type = ARM_CP_NOP },
{ .name = "DMB", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 5,
.access = PL0_W, .type = ARM_CP_NOP },
{ .name = "IFAR", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 2,
.access = PL1_RW,
.bank_fieldoffsets = { offsetof(CPUARMState, cp15.ifar_s),
offsetof(CPUARMState, cp15.ifar_ns) },
.resetvalue = 0, },
/* Watchpoint Fault Address Register : should actually only be present
* for 1136, 1176, 11MPCore.
*/
{ .name = "WFAR", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 1,
.access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0, },
{ .name = "CPACR", .state = ARM_CP_STATE_BOTH, .opc0 = 3,
.crn = 1, .crm = 0, .opc1 = 0, .opc2 = 2, .accessfn = cpacr_access,
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.cpacr_el1),
.resetfn = cpacr_reset, .writefn = cpacr_write },
REGINFO_SENTINEL
};
/* Definitions for the PMU registers */
#define PMCRN_MASK 0xf800
#define PMCRN_SHIFT 11
#define PMCRD 0x8
#define PMCRC 0x4
#define PMCRE 0x1
static inline uint32_t pmu_num_counters(CPUARMState *env)
{
return (env->cp15.c9_pmcr & PMCRN_MASK) >> PMCRN_SHIFT;
}
/* Bits allowed to be set/cleared for PMCNTEN* and PMINTEN* */
static inline uint64_t pmu_counter_mask(CPUARMState *env)
{
return (1 << 31) | ((1 << pmu_num_counters(env)) - 1);
}
static CPAccessResult pmreg_access(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
/* Performance monitor registers user accessibility is controlled
* by PMUSERENR. MDCR_EL2.TPM and MDCR_EL3.TPM allow configurable
* trapping to EL2 or EL3 for other accesses.
*/
int el = arm_current_el(env);
if (el == 0 && !(env->cp15.c9_pmuserenr & 1)) {
return CP_ACCESS_TRAP;
}
if (el < 2 && (env->cp15.mdcr_el2 & MDCR_TPM)
&& !arm_is_secure_below_el3(env)) {
return CP_ACCESS_TRAP_EL2;
}
if (el < 3 && (env->cp15.mdcr_el3 & MDCR_TPM)) {
return CP_ACCESS_TRAP_EL3;
}
return CP_ACCESS_OK;
}
static CPAccessResult pmreg_access_xevcntr(CPUARMState *env,
const ARMCPRegInfo *ri,
bool isread)
{
/* ER: event counter read trap control */
if (arm_feature(env, ARM_FEATURE_V8)
&& arm_current_el(env) == 0
&& (env->cp15.c9_pmuserenr & (1 << 3)) != 0
&& isread) {
return CP_ACCESS_OK;
}
return pmreg_access(env, ri, isread);
}
static CPAccessResult pmreg_access_swinc(CPUARMState *env,
const ARMCPRegInfo *ri,
bool isread)
{
/* SW: software increment write trap control */
if (arm_feature(env, ARM_FEATURE_V8)
&& arm_current_el(env) == 0
&& (env->cp15.c9_pmuserenr & (1 << 1)) != 0
&& !isread) {
return CP_ACCESS_OK;
}
return pmreg_access(env, ri, isread);
}
#ifndef CONFIG_USER_ONLY
static CPAccessResult pmreg_access_selr(CPUARMState *env,
const ARMCPRegInfo *ri,
bool isread)
{
/* ER: event counter read trap control */
if (arm_feature(env, ARM_FEATURE_V8)
&& arm_current_el(env) == 0
&& (env->cp15.c9_pmuserenr & (1 << 3)) != 0) {
return CP_ACCESS_OK;
}
return pmreg_access(env, ri, isread);
}
static CPAccessResult pmreg_access_ccntr(CPUARMState *env,
const ARMCPRegInfo *ri,
bool isread)
{
/* CR: cycle counter read trap control */
if (arm_feature(env, ARM_FEATURE_V8)
&& arm_current_el(env) == 0
&& (env->cp15.c9_pmuserenr & (1 << 2)) != 0
&& isread) {
return CP_ACCESS_OK;
}
return pmreg_access(env, ri, isread);
}
static inline bool arm_ccnt_enabled(CPUARMState *env)
{
/* This does not support checking PMCCFILTR_EL0 register */
if (!(env->cp15.c9_pmcr & PMCRE) || !(env->cp15.c9_pmcnten & (1 << 31))) {
return false;
}
return true;
}
void pmccntr_sync(CPUARMState *env)
{
uint64_t temp_ticks;
temp_ticks = muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL),
ARM_CPU_FREQ, NANOSECONDS_PER_SECOND);
if (env->cp15.c9_pmcr & PMCRD) {
/* Increment once every 64 processor clock cycles */
temp_ticks /= 64;
}
if (arm_ccnt_enabled(env)) {
env->cp15.c15_ccnt = temp_ticks - env->cp15.c15_ccnt;
}
}
static void pmcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
pmccntr_sync(env);
if (value & PMCRC) {
/* The counter has been reset */
env->cp15.c15_ccnt = 0;
}
/* only the DP, X, D and E bits are writable */
env->cp15.c9_pmcr &= ~0x39;
env->cp15.c9_pmcr |= (value & 0x39);
pmccntr_sync(env);
}
static uint64_t pmccntr_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
uint64_t total_ticks;
if (!arm_ccnt_enabled(env)) {
/* Counter is disabled, do not change value */
return env->cp15.c15_ccnt;
}
total_ticks = muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL),
ARM_CPU_FREQ, NANOSECONDS_PER_SECOND);
if (env->cp15.c9_pmcr & PMCRD) {
/* Increment once every 64 processor clock cycles */
total_ticks /= 64;
}
return total_ticks - env->cp15.c15_ccnt;
}
static void pmselr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* The value of PMSELR.SEL affects the behavior of PMXEVTYPER and
* PMXEVCNTR. We allow [0..31] to be written to PMSELR here; in the
* meanwhile, we check PMSELR.SEL when PMXEVTYPER and PMXEVCNTR are
* accessed.
*/
env->cp15.c9_pmselr = value & 0x1f;
}
static void pmccntr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
uint64_t total_ticks;
if (!arm_ccnt_enabled(env)) {
/* Counter is disabled, set the absolute value */
env->cp15.c15_ccnt = value;
return;
}
total_ticks = muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL),
ARM_CPU_FREQ, NANOSECONDS_PER_SECOND);
if (env->cp15.c9_pmcr & PMCRD) {
/* Increment once every 64 processor clock cycles */
total_ticks /= 64;
}
env->cp15.c15_ccnt = total_ticks - value;
}
static void pmccntr_write32(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
uint64_t cur_val = pmccntr_read(env, NULL);
pmccntr_write(env, ri, deposit64(cur_val, 0, 32, value));
}
#else /* CONFIG_USER_ONLY */
void pmccntr_sync(CPUARMState *env)
{
}
#endif
static void pmccfiltr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
pmccntr_sync(env);
env->cp15.pmccfiltr_el0 = value & 0xfc000000;
pmccntr_sync(env);
}
static void pmcntenset_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
value &= pmu_counter_mask(env);
env->cp15.c9_pmcnten |= value;
}
static void pmcntenclr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
value &= pmu_counter_mask(env);
env->cp15.c9_pmcnten &= ~value;
}
static void pmovsr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
env->cp15.c9_pmovsr &= ~value;
}
static void pmxevtyper_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* Attempts to access PMXEVTYPER are CONSTRAINED UNPREDICTABLE when
* PMSELR value is equal to or greater than the number of implemented
* counters, but not equal to 0x1f. We opt to behave as a RAZ/WI.
*/
if (env->cp15.c9_pmselr == 0x1f) {
pmccfiltr_write(env, ri, value);
}
}
static uint64_t pmxevtyper_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
/* We opt to behave as a RAZ/WI when attempts to access PMXEVTYPER
* are CONSTRAINED UNPREDICTABLE. See comments in pmxevtyper_write().
*/
if (env->cp15.c9_pmselr == 0x1f) {
return env->cp15.pmccfiltr_el0;
} else {
return 0;
}
}
static void pmuserenr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
if (arm_feature(env, ARM_FEATURE_V8)) {
env->cp15.c9_pmuserenr = value & 0xf;
} else {
env->cp15.c9_pmuserenr = value & 1;
}
}
static void pmintenset_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* We have no event counters so only the C bit can be changed */
value &= pmu_counter_mask(env);
env->cp15.c9_pminten |= value;
}
static void pmintenclr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
value &= pmu_counter_mask(env);
env->cp15.c9_pminten &= ~value;
}
static void vbar_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* Note that even though the AArch64 view of this register has bits
* [10:0] all RES0 we can only mask the bottom 5, to comply with the
* architectural requirements for bits which are RES0 only in some
* contexts. (ARMv8 would permit us to do no masking at all, but ARMv7
* requires the bottom five bits to be RAZ/WI because they're UNK/SBZP.)
*/
raw_write(env, ri, value & ~0x1FULL);
}
static void scr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
{
/* We only mask off bits that are RES0 both for AArch64 and AArch32.
* For bits that vary between AArch32/64, code needs to check the
* current execution mode before directly using the feature bit.
*/
uint32_t valid_mask = SCR_AARCH64_MASK | SCR_AARCH32_MASK;
if (!arm_feature(env, ARM_FEATURE_EL2)) {
valid_mask &= ~SCR_HCE;
/* On ARMv7, SMD (or SCD as it is called in v7) is only
* supported if EL2 exists. The bit is UNK/SBZP when
* EL2 is unavailable. In QEMU ARMv7, we force it to always zero
* when EL2 is unavailable.
* On ARMv8, this bit is always available.
*/
if (arm_feature(env, ARM_FEATURE_V7) &&
!arm_feature(env, ARM_FEATURE_V8)) {
valid_mask &= ~SCR_SMD;
}
}
/* Clear all-context RES0 bits. */
value &= valid_mask;
raw_write(env, ri, value);
}
static uint64_t ccsidr_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
ARMCPU *cpu = arm_env_get_cpu(env);
/* Acquire the CSSELR index from the bank corresponding to the CCSIDR
* bank
*/
uint32_t index = A32_BANKED_REG_GET(env, csselr,
ri->secure & ARM_CP_SECSTATE_S);
return cpu->ccsidr[index];
}
static void csselr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
raw_write(env, ri, value & 0xf);
}
static uint64_t isr_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
CPUState *cs = ENV_GET_CPU(env);
uint64_t ret = 0;
if (cs->interrupt_request & CPU_INTERRUPT_HARD) {
ret |= CPSR_I;
}
if (cs->interrupt_request & CPU_INTERRUPT_FIQ) {
ret |= CPSR_F;
}
/* External aborts are not possible in QEMU so A bit is always clear */
return ret;
}
static const ARMCPRegInfo v7_cp_reginfo[] = {
/* the old v6 WFI, UNPREDICTABLE in v7 but we choose to NOP */
{ .name = "NOP", .cp = 15, .crn = 7, .crm = 0, .opc1 = 0, .opc2 = 4,
.access = PL1_W, .type = ARM_CP_NOP },
/* Performance monitors are implementation defined in v7,
* but with an ARM recommended set of registers, which we
* follow (although we don't actually implement any counters)
*
* Performance registers fall into three categories:
* (a) always UNDEF in PL0, RW in PL1 (PMINTENSET, PMINTENCLR)
* (b) RO in PL0 (ie UNDEF on write), RW in PL1 (PMUSERENR)
* (c) UNDEF in PL0 if PMUSERENR.EN==0, otherwise accessible (all others)
* For the cases controlled by PMUSERENR we must set .access to PL0_RW
* or PL0_RO as appropriate and then check PMUSERENR in the helper fn.
*/
{ .name = "PMCNTENSET", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 1,
.access = PL0_RW, .type = ARM_CP_ALIAS,
.fieldoffset = offsetoflow32(CPUARMState, cp15.c9_pmcnten),
.writefn = pmcntenset_write,
.accessfn = pmreg_access,
.raw_writefn = raw_write },
{ .name = "PMCNTENSET_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .crn = 9, .crm = 12, .opc2 = 1,
.access = PL0_RW, .accessfn = pmreg_access,
.fieldoffset = offsetof(CPUARMState, cp15.c9_pmcnten), .resetvalue = 0,
.writefn = pmcntenset_write, .raw_writefn = raw_write },
{ .name = "PMCNTENCLR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 2,
.access = PL0_RW,
.fieldoffset = offsetoflow32(CPUARMState, cp15.c9_pmcnten),
.accessfn = pmreg_access,
.writefn = pmcntenclr_write,
.type = ARM_CP_ALIAS },
{ .name = "PMCNTENCLR_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .crn = 9, .crm = 12, .opc2 = 2,
.access = PL0_RW, .accessfn = pmreg_access,
.type = ARM_CP_ALIAS,
.fieldoffset = offsetof(CPUARMState, cp15.c9_pmcnten),
.writefn = pmcntenclr_write },
{ .name = "PMOVSR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 3,
.access = PL0_RW,
.fieldoffset = offsetoflow32(CPUARMState, cp15.c9_pmovsr),
.accessfn = pmreg_access,
.writefn = pmovsr_write,
.raw_writefn = raw_write },
{ .name = "PMOVSCLR_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .crn = 9, .crm = 12, .opc2 = 3,
.access = PL0_RW, .accessfn = pmreg_access,
.type = ARM_CP_ALIAS,
.fieldoffset = offsetof(CPUARMState, cp15.c9_pmovsr),
.writefn = pmovsr_write,
.raw_writefn = raw_write },
/* Unimplemented so WI. */
{ .name = "PMSWINC", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 4,
.access = PL0_W, .accessfn = pmreg_access_swinc, .type = ARM_CP_NOP },
#ifndef CONFIG_USER_ONLY
{ .name = "PMSELR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 5,
.access = PL0_RW, .type = ARM_CP_ALIAS,
.fieldoffset = offsetoflow32(CPUARMState, cp15.c9_pmselr),
.accessfn = pmreg_access_selr, .writefn = pmselr_write,
.raw_writefn = raw_write},
{ .name = "PMSELR_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .crn = 9, .crm = 12, .opc2 = 5,
.access = PL0_RW, .accessfn = pmreg_access_selr,
.fieldoffset = offsetof(CPUARMState, cp15.c9_pmselr),
.writefn = pmselr_write, .raw_writefn = raw_write, },
{ .name = "PMCCNTR", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 0,
.access = PL0_RW, .resetvalue = 0, .type = ARM_CP_ALIAS | ARM_CP_IO,
.readfn = pmccntr_read, .writefn = pmccntr_write32,
.accessfn = pmreg_access_ccntr },
{ .name = "PMCCNTR_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .crn = 9, .crm = 13, .opc2 = 0,
.access = PL0_RW, .accessfn = pmreg_access_ccntr,
.type = ARM_CP_IO,
.readfn = pmccntr_read, .writefn = pmccntr_write, },
#endif
{ .name = "PMCCFILTR_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .crn = 14, .crm = 15, .opc2 = 7,
.writefn = pmccfiltr_write,
.access = PL0_RW, .accessfn = pmreg_access,
.type = ARM_CP_IO,
.fieldoffset = offsetof(CPUARMState, cp15.pmccfiltr_el0),
.resetvalue = 0, },
{ .name = "PMXEVTYPER", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 1,
.access = PL0_RW, .type = ARM_CP_NO_RAW, .accessfn = pmreg_access,
.writefn = pmxevtyper_write, .readfn = pmxevtyper_read },
{ .name = "PMXEVTYPER_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .crn = 9, .crm = 13, .opc2 = 1,
.access = PL0_RW, .type = ARM_CP_NO_RAW, .accessfn = pmreg_access,
.writefn = pmxevtyper_write, .readfn = pmxevtyper_read },
/* Unimplemented, RAZ/WI. */
{ .name = "PMXEVCNTR", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 2,
.access = PL0_RW, .type = ARM_CP_CONST, .resetvalue = 0,
.accessfn = pmreg_access_xevcntr },
{ .name = "PMUSERENR", .cp = 15, .crn = 9, .crm = 14, .opc1 = 0, .opc2 = 0,
.access = PL0_R | PL1_RW, .accessfn = access_tpm,
.fieldoffset = offsetoflow32(CPUARMState, cp15.c9_pmuserenr),
.resetvalue = 0,
.writefn = pmuserenr_write, .raw_writefn = raw_write },
{ .name = "PMUSERENR_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .crn = 9, .crm = 14, .opc2 = 0,
.access = PL0_R | PL1_RW, .accessfn = access_tpm, .type = ARM_CP_ALIAS,
.fieldoffset = offsetof(CPUARMState, cp15.c9_pmuserenr),
.resetvalue = 0,
.writefn = pmuserenr_write, .raw_writefn = raw_write },
{ .name = "PMINTENSET", .cp = 15, .crn = 9, .crm = 14, .opc1 = 0, .opc2 = 1,
.access = PL1_RW, .accessfn = access_tpm,
.type = ARM_CP_ALIAS,
.fieldoffset = offsetoflow32(CPUARMState, cp15.c9_pminten),
.resetvalue = 0,
.writefn = pmintenset_write, .raw_writefn = raw_write },
{ .name = "PMINTENSET_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 9, .crm = 14, .opc2 = 1,
.access = PL1_RW, .accessfn = access_tpm,
.type = ARM_CP_IO,
.fieldoffset = offsetof(CPUARMState, cp15.c9_pminten),
.writefn = pmintenset_write, .raw_writefn = raw_write,
.resetvalue = 0x0 },
{ .name = "PMINTENCLR", .cp = 15, .crn = 9, .crm = 14, .opc1 = 0, .opc2 = 2,
.access = PL1_RW, .accessfn = access_tpm, .type = ARM_CP_ALIAS,
.fieldoffset = offsetof(CPUARMState, cp15.c9_pminten),
.writefn = pmintenclr_write, },
{ .name = "PMINTENCLR_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 9, .crm = 14, .opc2 = 2,
.access = PL1_RW, .accessfn = access_tpm, .type = ARM_CP_ALIAS,
.fieldoffset = offsetof(CPUARMState, cp15.c9_pminten),
.writefn = pmintenclr_write },
{ .name = "CCSIDR", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = 0,
.access = PL1_R, .readfn = ccsidr_read, .type = ARM_CP_NO_RAW },
{ .name = "CSSELR", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .crn = 0, .crm = 0, .opc1 = 2, .opc2 = 0,
.access = PL1_RW, .writefn = csselr_write, .resetvalue = 0,
.bank_fieldoffsets = { offsetof(CPUARMState, cp15.csselr_s),
offsetof(CPUARMState, cp15.csselr_ns) } },
/* Auxiliary ID register: this actually has an IMPDEF value but for now
* just RAZ for all cores:
*/
{ .name = "AIDR", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 1, .crn = 0, .crm = 0, .opc2 = 7,
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
/* Auxiliary fault status registers: these also are IMPDEF, and we
* choose to RAZ/WI for all cores.
*/
{ .name = "AFSR0_EL1", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 5, .crm = 1, .opc2 = 0,
.access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "AFSR1_EL1", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 5, .crm = 1, .opc2 = 1,
.access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
/* MAIR can just read-as-written because we don't implement caches
* and so don't need to care about memory attributes.
*/
{ .name = "MAIR_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 10, .crm = 2, .opc2 = 0,
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.mair_el[1]),
.resetvalue = 0 },
{ .name = "MAIR_EL3", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 6, .crn = 10, .crm = 2, .opc2 = 0,
.access = PL3_RW, .fieldoffset = offsetof(CPUARMState, cp15.mair_el[3]),
.resetvalue = 0 },
/* For non-long-descriptor page tables these are PRRR and NMRR;
* regardless they still act as reads-as-written for QEMU.
*/
/* MAIR0/1 are defined separately from their 64-bit counterpart which
* allows them to assign the correct fieldoffset based on the endianness
* handled in the field definitions.
*/
{ .name = "MAIR0", .state = ARM_CP_STATE_AA32,
.cp = 15, .opc1 = 0, .crn = 10, .crm = 2, .opc2 = 0, .access = PL1_RW,
.bank_fieldoffsets = { offsetof(CPUARMState, cp15.mair0_s),
offsetof(CPUARMState, cp15.mair0_ns) },
.resetfn = arm_cp_reset_ignore },
{ .name = "MAIR1", .state = ARM_CP_STATE_AA32,
.cp = 15, .opc1 = 0, .crn = 10, .crm = 2, .opc2 = 1, .access = PL1_RW,
.bank_fieldoffsets = { offsetof(CPUARMState, cp15.mair1_s),
offsetof(CPUARMState, cp15.mair1_ns) },
.resetfn = arm_cp_reset_ignore },
{ .name = "ISR_EL1", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 12, .crm = 1, .opc2 = 0,
.type = ARM_CP_NO_RAW, .access = PL1_R, .readfn = isr_read },
/* 32 bit ITLB invalidates */
{ .name = "ITLBIALL", .cp = 15, .opc1 = 0, .crn = 8, .crm = 5, .opc2 = 0,
.type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbiall_write },
{ .name = "ITLBIMVA", .cp = 15, .opc1 = 0, .crn = 8, .crm = 5, .opc2 = 1,
.type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbimva_write },
{ .name = "ITLBIASID", .cp = 15, .opc1 = 0, .crn = 8, .crm = 5, .opc2 = 2,
.type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbiasid_write },
/* 32 bit DTLB invalidates */
{ .name = "DTLBIALL", .cp = 15, .opc1 = 0, .crn = 8, .crm = 6, .opc2 = 0,
.type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbiall_write },
{ .name = "DTLBIMVA", .cp = 15, .opc1 = 0, .crn = 8, .crm = 6, .opc2 = 1,
.type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbimva_write },
{ .name = "DTLBIASID", .cp = 15, .opc1 = 0, .crn = 8, .crm = 6, .opc2 = 2,
.type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbiasid_write },
/* 32 bit TLB invalidates */
{ .name = "TLBIALL", .cp = 15, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 0,
.type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbiall_write },
{ .name = "TLBIMVA", .cp = 15, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 1,
.type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbimva_write },
{ .name = "TLBIASID", .cp = 15, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 2,
.type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbiasid_write },
{ .name = "TLBIMVAA", .cp = 15, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 3,
.type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbimvaa_write },
REGINFO_SENTINEL
};
static const ARMCPRegInfo v7mp_cp_reginfo[] = {
/* 32 bit TLB invalidates, Inner Shareable */
{ .name = "TLBIALLIS", .cp = 15, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 0,
.type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbiall_is_write },
{ .name = "TLBIMVAIS", .cp = 15, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 1,
.type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbimva_is_write },
{ .name = "TLBIASIDIS", .cp = 15, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 2,
.type = ARM_CP_NO_RAW, .access = PL1_W,
.writefn = tlbiasid_is_write },
{ .name = "TLBIMVAAIS", .cp = 15, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 3,
.type = ARM_CP_NO_RAW, .access = PL1_W,
.writefn = tlbimvaa_is_write },
REGINFO_SENTINEL
};
static void teecr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
value &= 1;
env->teecr = value;
}
static CPAccessResult teehbr_access(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
if (arm_current_el(env) == 0 && (env->teecr & 1)) {
return CP_ACCESS_TRAP;
}
return CP_ACCESS_OK;
}
static const ARMCPRegInfo t2ee_cp_reginfo[] = {
{ .name = "TEECR", .cp = 14, .crn = 0, .crm = 0, .opc1 = 6, .opc2 = 0,
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, teecr),
.resetvalue = 0,
.writefn = teecr_write },
{ .name = "TEEHBR", .cp = 14, .crn = 1, .crm = 0, .opc1 = 6, .opc2 = 0,
.access = PL0_RW, .fieldoffset = offsetof(CPUARMState, teehbr),
.accessfn = teehbr_access, .resetvalue = 0 },
REGINFO_SENTINEL
};
static const ARMCPRegInfo v6k_cp_reginfo[] = {
{ .name = "TPIDR_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .opc2 = 2, .crn = 13, .crm = 0,
.access = PL0_RW,
.fieldoffset = offsetof(CPUARMState, cp15.tpidr_el[0]), .resetvalue = 0 },
{ .name = "TPIDRURW", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 2,
.access = PL0_RW,
.bank_fieldoffsets = { offsetoflow32(CPUARMState, cp15.tpidrurw_s),
offsetoflow32(CPUARMState, cp15.tpidrurw_ns) },
.resetfn = arm_cp_reset_ignore },
{ .name = "TPIDRRO_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .opc2 = 3, .crn = 13, .crm = 0,
.access = PL0_R|PL1_W,
.fieldoffset = offsetof(CPUARMState, cp15.tpidrro_el[0]),
.resetvalue = 0},
{ .name = "TPIDRURO", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 3,
.access = PL0_R|PL1_W,
.bank_fieldoffsets = { offsetoflow32(CPUARMState, cp15.tpidruro_s),
offsetoflow32(CPUARMState, cp15.tpidruro_ns) },
.resetfn = arm_cp_reset_ignore },
{ .name = "TPIDR_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .opc2 = 4, .crn = 13, .crm = 0,
.access = PL1_RW,
.fieldoffset = offsetof(CPUARMState, cp15.tpidr_el[1]), .resetvalue = 0 },
{ .name = "TPIDRPRW", .opc1 = 0, .cp = 15, .crn = 13, .crm = 0, .opc2 = 4,
.access = PL1_RW,
.bank_fieldoffsets = { offsetoflow32(CPUARMState, cp15.tpidrprw_s),
offsetoflow32(CPUARMState, cp15.tpidrprw_ns) },
.resetvalue = 0 },
REGINFO_SENTINEL
};
#ifndef CONFIG_USER_ONLY
static CPAccessResult gt_cntfrq_access(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
/* CNTFRQ: not visible from PL0 if both PL0PCTEN and PL0VCTEN are zero.
* Writable only at the highest implemented exception level.
*/
int el = arm_current_el(env);
switch (el) {
case 0:
if (!extract32(env->cp15.c14_cntkctl, 0, 2)) {
return CP_ACCESS_TRAP;
}
break;
case 1:
if (!isread && ri->state == ARM_CP_STATE_AA32 &&
arm_is_secure_below_el3(env)) {
/* Accesses from 32-bit Secure EL1 UNDEF (*not* trap to EL3!) */
return CP_ACCESS_TRAP_UNCATEGORIZED;
}
break;
case 2:
case 3:
break;
}
if (!isread && el < arm_highest_el(env)) {
return CP_ACCESS_TRAP_UNCATEGORIZED;
}
return CP_ACCESS_OK;
}
static CPAccessResult gt_counter_access(CPUARMState *env, int timeridx,
bool isread)
{
unsigned int cur_el = arm_current_el(env);
bool secure = arm_is_secure(env);
/* CNT[PV]CT: not visible from PL0 if ELO[PV]CTEN is zero */
if (cur_el == 0 &&
!extract32(env->cp15.c14_cntkctl, timeridx, 1)) {
return CP_ACCESS_TRAP;
}
if (arm_feature(env, ARM_FEATURE_EL2) &&
timeridx == GTIMER_PHYS && !secure && cur_el < 2 &&
!extract32(env->cp15.cnthctl_el2, 0, 1)) {
return CP_ACCESS_TRAP_EL2;
}
return CP_ACCESS_OK;
}
static CPAccessResult gt_timer_access(CPUARMState *env, int timeridx,
bool isread)
{
unsigned int cur_el = arm_current_el(env);
bool secure = arm_is_secure(env);
/* CNT[PV]_CVAL, CNT[PV]_CTL, CNT[PV]_TVAL: not visible from PL0 if
* EL0[PV]TEN is zero.
*/
if (cur_el == 0 &&
!extract32(env->cp15.c14_cntkctl, 9 - timeridx, 1)) {
return CP_ACCESS_TRAP;
}
if (arm_feature(env, ARM_FEATURE_EL2) &&
timeridx == GTIMER_PHYS && !secure && cur_el < 2 &&
!extract32(env->cp15.cnthctl_el2, 1, 1)) {
return CP_ACCESS_TRAP_EL2;
}
return CP_ACCESS_OK;
}
static CPAccessResult gt_pct_access(CPUARMState *env,
const ARMCPRegInfo *ri,
bool isread)
{
return gt_counter_access(env, GTIMER_PHYS, isread);
}
static CPAccessResult gt_vct_access(CPUARMState *env,
const ARMCPRegInfo *ri,
bool isread)
{
return gt_counter_access(env, GTIMER_VIRT, isread);
}
static CPAccessResult gt_ptimer_access(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
return gt_timer_access(env, GTIMER_PHYS, isread);
}
static CPAccessResult gt_vtimer_access(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
return gt_timer_access(env, GTIMER_VIRT, isread);
}
static CPAccessResult gt_stimer_access(CPUARMState *env,
const ARMCPRegInfo *ri,
bool isread)
{
/* The AArch64 register view of the secure physical timer is
* always accessible from EL3, and configurably accessible from
* Secure EL1.
*/
switch (arm_current_el(env)) {
case 1:
if (!arm_is_secure(env)) {
return CP_ACCESS_TRAP;
}
if (!(env->cp15.scr_el3 & SCR_ST)) {
return CP_ACCESS_TRAP_EL3;
}
return CP_ACCESS_OK;
case 0:
case 2:
return CP_ACCESS_TRAP;
case 3:
return CP_ACCESS_OK;
default:
g_assert_not_reached();
}
}
static uint64_t gt_get_countervalue(CPUARMState *env)
{
return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) / GTIMER_SCALE;
}
static void gt_recalc_timer(ARMCPU *cpu, int timeridx)
{
ARMGenericTimer *gt = &cpu->env.cp15.c14_timer[timeridx];
if (gt->ctl & 1) {
/* Timer enabled: calculate and set current ISTATUS, irq, and
* reset timer to when ISTATUS next has to change
*/
uint64_t offset = timeridx == GTIMER_VIRT ?
cpu->env.cp15.cntvoff_el2 : 0;
uint64_t count = gt_get_countervalue(&cpu->env);
/* Note that this must be unsigned 64 bit arithmetic: */
int istatus = count - offset >= gt->cval;
uint64_t nexttick;
int irqstate;
gt->ctl = deposit32(gt->ctl, 2, 1, istatus);
irqstate = (istatus && !(gt->ctl & 2));
qemu_set_irq(cpu->gt_timer_outputs[timeridx], irqstate);
if (istatus) {
/* Next transition is when count rolls back over to zero */
nexttick = UINT64_MAX;
} else {
/* Next transition is when we hit cval */
nexttick = gt->cval + offset;
}
/* Note that the desired next expiry time might be beyond the
* signed-64-bit range of a QEMUTimer -- in this case we just
* set the timer for as far in the future as possible. When the
* timer expires we will reset the timer for any remaining period.
*/
if (nexttick > INT64_MAX / GTIMER_SCALE) {
nexttick = INT64_MAX / GTIMER_SCALE;
}
timer_mod(cpu->gt_timer[timeridx], nexttick);
trace_arm_gt_recalc(timeridx, irqstate, nexttick);
} else {
/* Timer disabled: ISTATUS and timer output always clear */
gt->ctl &= ~4;
qemu_set_irq(cpu->gt_timer_outputs[timeridx], 0);
timer_del(cpu->gt_timer[timeridx]);
trace_arm_gt_recalc_disabled(timeridx);
}
}
static void gt_timer_reset(CPUARMState *env, const ARMCPRegInfo *ri,
int timeridx)
{
ARMCPU *cpu = arm_env_get_cpu(env);
timer_del(cpu->gt_timer[timeridx]);
}
static uint64_t gt_cnt_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
return gt_get_countervalue(env);
}
static uint64_t gt_virt_cnt_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
return gt_get_countervalue(env) - env->cp15.cntvoff_el2;
}
static void gt_cval_write(CPUARMState *env, const ARMCPRegInfo *ri,
int timeridx,
uint64_t value)
{
trace_arm_gt_cval_write(timeridx, value);
env->cp15.c14_timer[timeridx].cval = value;
gt_recalc_timer(arm_env_get_cpu(env), timeridx);
}
static uint64_t gt_tval_read(CPUARMState *env, const ARMCPRegInfo *ri,
int timeridx)
{
uint64_t offset = timeridx == GTIMER_VIRT ? env->cp15.cntvoff_el2 : 0;
return (uint32_t)(env->cp15.c14_timer[timeridx].cval -
(gt_get_countervalue(env) - offset));
}
static void gt_tval_write(CPUARMState *env, const ARMCPRegInfo *ri,
int timeridx,
uint64_t value)
{
uint64_t offset = timeridx == GTIMER_VIRT ? env->cp15.cntvoff_el2 : 0;
trace_arm_gt_tval_write(timeridx, value);
env->cp15.c14_timer[timeridx].cval = gt_get_countervalue(env) - offset +
sextract64(value, 0, 32);
gt_recalc_timer(arm_env_get_cpu(env), timeridx);
}
static void gt_ctl_write(CPUARMState *env, const ARMCPRegInfo *ri,
int timeridx,
uint64_t value)
{
ARMCPU *cpu = arm_env_get_cpu(env);
uint32_t oldval = env->cp15.c14_timer[timeridx].ctl;
trace_arm_gt_ctl_write(timeridx, value);
env->cp15.c14_timer[timeridx].ctl = deposit64(oldval, 0, 2, value);
if ((oldval ^ value) & 1) {
/* Enable toggled */
gt_recalc_timer(cpu, timeridx);
} else if ((oldval ^ value) & 2) {
/* IMASK toggled: don't need to recalculate,
* just set the interrupt line based on ISTATUS
*/
int irqstate = (oldval & 4) && !(value & 2);
trace_arm_gt_imask_toggle(timeridx, irqstate);
qemu_set_irq(cpu->gt_timer_outputs[timeridx], irqstate);
}
}
static void gt_phys_timer_reset(CPUARMState *env, const ARMCPRegInfo *ri)
{
gt_timer_reset(env, ri, GTIMER_PHYS);
}
static void gt_phys_cval_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
gt_cval_write(env, ri, GTIMER_PHYS, value);
}
static uint64_t gt_phys_tval_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
return gt_tval_read(env, ri, GTIMER_PHYS);
}
static void gt_phys_tval_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
gt_tval_write(env, ri, GTIMER_PHYS, value);
}
static void gt_phys_ctl_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
gt_ctl_write(env, ri, GTIMER_PHYS, value);
}
static void gt_virt_timer_reset(CPUARMState *env, const ARMCPRegInfo *ri)
{
gt_timer_reset(env, ri, GTIMER_VIRT);
}
static void gt_virt_cval_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
gt_cval_write(env, ri, GTIMER_VIRT, value);
}
static uint64_t gt_virt_tval_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
return gt_tval_read(env, ri, GTIMER_VIRT);
}
static void gt_virt_tval_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
gt_tval_write(env, ri, GTIMER_VIRT, value);
}
static void gt_virt_ctl_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
gt_ctl_write(env, ri, GTIMER_VIRT, value);
}
static void gt_cntvoff_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
ARMCPU *cpu = arm_env_get_cpu(env);
trace_arm_gt_cntvoff_write(value);
raw_write(env, ri, value);
gt_recalc_timer(cpu, GTIMER_VIRT);
}
static void gt_hyp_timer_reset(CPUARMState *env, const ARMCPRegInfo *ri)
{
gt_timer_reset(env, ri, GTIMER_HYP);
}
static void gt_hyp_cval_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
gt_cval_write(env, ri, GTIMER_HYP, value);
}
static uint64_t gt_hyp_tval_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
return gt_tval_read(env, ri, GTIMER_HYP);
}
static void gt_hyp_tval_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
gt_tval_write(env, ri, GTIMER_HYP, value);
}
static void gt_hyp_ctl_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
gt_ctl_write(env, ri, GTIMER_HYP, value);
}
static void gt_sec_timer_reset(CPUARMState *env, const ARMCPRegInfo *ri)
{
gt_timer_reset(env, ri, GTIMER_SEC);
}
static void gt_sec_cval_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
gt_cval_write(env, ri, GTIMER_SEC, value);
}
static uint64_t gt_sec_tval_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
return gt_tval_read(env, ri, GTIMER_SEC);
}
static void gt_sec_tval_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
gt_tval_write(env, ri, GTIMER_SEC, value);
}
static void gt_sec_ctl_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
gt_ctl_write(env, ri, GTIMER_SEC, value);
}
void arm_gt_ptimer_cb(void *opaque)
{
ARMCPU *cpu = opaque;
gt_recalc_timer(cpu, GTIMER_PHYS);
}
void arm_gt_vtimer_cb(void *opaque)
{
ARMCPU *cpu = opaque;
gt_recalc_timer(cpu, GTIMER_VIRT);
}
void arm_gt_htimer_cb(void *opaque)
{
ARMCPU *cpu = opaque;
gt_recalc_timer(cpu, GTIMER_HYP);
}
void arm_gt_stimer_cb(void *opaque)
{
ARMCPU *cpu = opaque;
gt_recalc_timer(cpu, GTIMER_SEC);
}
static const ARMCPRegInfo generic_timer_cp_reginfo[] = {
/* Note that CNTFRQ is purely reads-as-written for the benefit
* of software; writing it doesn't actually change the timer frequency.
* Our reset value matches the fixed frequency we implement the timer at.
*/
{ .name = "CNTFRQ", .cp = 15, .crn = 14, .crm = 0, .opc1 = 0, .opc2 = 0,
.type = ARM_CP_ALIAS,
.access = PL1_RW | PL0_R, .accessfn = gt_cntfrq_access,
.fieldoffset = offsetoflow32(CPUARMState, cp15.c14_cntfrq),
},
{ .name = "CNTFRQ_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .crn = 14, .crm = 0, .opc2 = 0,
.access = PL1_RW | PL0_R, .accessfn = gt_cntfrq_access,
.fieldoffset = offsetof(CPUARMState, cp15.c14_cntfrq),
.resetvalue = (1000 * 1000 * 1000) / GTIMER_SCALE,
},
/* overall control: mostly access permissions */
{ .name = "CNTKCTL", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 14, .crm = 1, .opc2 = 0,
.access = PL1_RW,
.fieldoffset = offsetof(CPUARMState, cp15.c14_cntkctl),
.resetvalue = 0,
},
/* per-timer control */
{ .name = "CNTP_CTL", .cp = 15, .crn = 14, .crm = 2, .opc1 = 0, .opc2 = 1,
.secure = ARM_CP_SECSTATE_NS,
.type = ARM_CP_IO | ARM_CP_ALIAS, .access = PL1_RW | PL0_R,
.accessfn = gt_ptimer_access,
.fieldoffset = offsetoflow32(CPUARMState,
cp15.c14_timer[GTIMER_PHYS].ctl),
.writefn = gt_phys_ctl_write, .raw_writefn = raw_write,
},
{ .name = "CNTP_CTL_S",
.cp = 15, .crn = 14, .crm = 2, .opc1 = 0, .opc2 = 1,
.secure = ARM_CP_SECSTATE_S,
.type = ARM_CP_IO | ARM_CP_ALIAS, .access = PL1_RW | PL0_R,
.accessfn = gt_ptimer_access,
.fieldoffset = offsetoflow32(CPUARMState,
cp15.c14_timer[GTIMER_SEC].ctl),
.writefn = gt_sec_ctl_write, .raw_writefn = raw_write,
},
{ .name = "CNTP_CTL_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .crn = 14, .crm = 2, .opc2 = 1,
.type = ARM_CP_IO, .access = PL1_RW | PL0_R,
.accessfn = gt_ptimer_access,
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_PHYS].ctl),
.resetvalue = 0,
.writefn = gt_phys_ctl_write, .raw_writefn = raw_write,
},
{ .name = "CNTV_CTL", .cp = 15, .crn = 14, .crm = 3, .opc1 = 0, .opc2 = 1,
.type = ARM_CP_IO | ARM_CP_ALIAS, .access = PL1_RW | PL0_R,
.accessfn = gt_vtimer_access,
.fieldoffset = offsetoflow32(CPUARMState,
cp15.c14_timer[GTIMER_VIRT].ctl),
.writefn = gt_virt_ctl_write, .raw_writefn = raw_write,
},
{ .name = "CNTV_CTL_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .crn = 14, .crm = 3, .opc2 = 1,
.type = ARM_CP_IO, .access = PL1_RW | PL0_R,
.accessfn = gt_vtimer_access,
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_VIRT].ctl),
.resetvalue = 0,
.writefn = gt_virt_ctl_write, .raw_writefn = raw_write,
},
/* TimerValue views: a 32 bit downcounting view of the underlying state */
{ .name = "CNTP_TVAL", .cp = 15, .crn = 14, .crm = 2, .opc1 = 0, .opc2 = 0,
.secure = ARM_CP_SECSTATE_NS,
.type = ARM_CP_NO_RAW | ARM_CP_IO, .access = PL1_RW | PL0_R,
.accessfn = gt_ptimer_access,
.readfn = gt_phys_tval_read, .writefn = gt_phys_tval_write,
},
{ .name = "CNTP_TVAL_S",
.cp = 15, .crn = 14, .crm = 2, .opc1 = 0, .opc2 = 0,
.secure = ARM_CP_SECSTATE_S,
.type = ARM_CP_NO_RAW | ARM_CP_IO, .access = PL1_RW | PL0_R,
.accessfn = gt_ptimer_access,
.readfn = gt_sec_tval_read, .writefn = gt_sec_tval_write,
},
{ .name = "CNTP_TVAL_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .crn = 14, .crm = 2, .opc2 = 0,
.type = ARM_CP_NO_RAW | ARM_CP_IO, .access = PL1_RW | PL0_R,
.accessfn = gt_ptimer_access, .resetfn = gt_phys_timer_reset,
.readfn = gt_phys_tval_read, .writefn = gt_phys_tval_write,
},
{ .name = "CNTV_TVAL", .cp = 15, .crn = 14, .crm = 3, .opc1 = 0, .opc2 = 0,
.type = ARM_CP_NO_RAW | ARM_CP_IO, .access = PL1_RW | PL0_R,
.accessfn = gt_vtimer_access,
.readfn = gt_virt_tval_read, .writefn = gt_virt_tval_write,
},
{ .name = "CNTV_TVAL_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .crn = 14, .crm = 3, .opc2 = 0,
.type = ARM_CP_NO_RAW | ARM_CP_IO, .access = PL1_RW | PL0_R,
.accessfn = gt_vtimer_access, .resetfn = gt_virt_timer_reset,
.readfn = gt_virt_tval_read, .writefn = gt_virt_tval_write,
},
/* The counter itself */
{ .name = "CNTPCT", .cp = 15, .crm = 14, .opc1 = 0,
.access = PL0_R, .type = ARM_CP_64BIT | ARM_CP_NO_RAW | ARM_CP_IO,
.accessfn = gt_pct_access,
.readfn = gt_cnt_read, .resetfn = arm_cp_reset_ignore,
},
{ .name = "CNTPCT_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .crn = 14, .crm = 0, .opc2 = 1,
.access = PL0_R, .type = ARM_CP_NO_RAW | ARM_CP_IO,
.accessfn = gt_pct_access, .readfn = gt_cnt_read,
},
{ .name = "CNTVCT", .cp = 15, .crm = 14, .opc1 = 1,
.access = PL0_R, .type = ARM_CP_64BIT | ARM_CP_NO_RAW | ARM_CP_IO,
.accessfn = gt_vct_access,
.readfn = gt_virt_cnt_read, .resetfn = arm_cp_reset_ignore,
},
{ .name = "CNTVCT_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .crn = 14, .crm = 0, .opc2 = 2,
.access = PL0_R, .type = ARM_CP_NO_RAW | ARM_CP_IO,
.accessfn = gt_vct_access, .readfn = gt_virt_cnt_read,
},
/* Comparison value, indicating when the timer goes off */
{ .name = "CNTP_CVAL", .cp = 15, .crm = 14, .opc1 = 2,
.secure = ARM_CP_SECSTATE_NS,
.access = PL1_RW | PL0_R,
.type = ARM_CP_64BIT | ARM_CP_IO | ARM_CP_ALIAS,
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_PHYS].cval),
.accessfn = gt_ptimer_access,
.writefn = gt_phys_cval_write, .raw_writefn = raw_write,
},
{ .name = "CNTP_CVAL_S", .cp = 15, .crm = 14, .opc1 = 2,
.secure = ARM_CP_SECSTATE_S,
.access = PL1_RW | PL0_R,
.type = ARM_CP_64BIT | ARM_CP_IO | ARM_CP_ALIAS,
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_SEC].cval),
.accessfn = gt_ptimer_access,
.writefn = gt_sec_cval_write, .raw_writefn = raw_write,
},
{ .name = "CNTP_CVAL_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .crn = 14, .crm = 2, .opc2 = 2,
.access = PL1_RW | PL0_R,
.type = ARM_CP_IO,
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_PHYS].cval),
.resetvalue = 0, .accessfn = gt_ptimer_access,
.writefn = gt_phys_cval_write, .raw_writefn = raw_write,
},
{ .name = "CNTV_CVAL", .cp = 15, .crm = 14, .opc1 = 3,
.access = PL1_RW | PL0_R,
.type = ARM_CP_64BIT | ARM_CP_IO | ARM_CP_ALIAS,
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_VIRT].cval),
.accessfn = gt_vtimer_access,
.writefn = gt_virt_cval_write, .raw_writefn = raw_write,
},
{ .name = "CNTV_CVAL_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .crn = 14, .crm = 3, .opc2 = 2,
.access = PL1_RW | PL0_R,
.type = ARM_CP_IO,
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_VIRT].cval),
.resetvalue = 0, .accessfn = gt_vtimer_access,
.writefn = gt_virt_cval_write, .raw_writefn = raw_write,
},
/* Secure timer -- this is actually restricted to only EL3
* and configurably Secure-EL1 via the accessfn.
*/
{ .name = "CNTPS_TVAL_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 7, .crn = 14, .crm = 2, .opc2 = 0,
.type = ARM_CP_NO_RAW | ARM_CP_IO, .access = PL1_RW,
.accessfn = gt_stimer_access,
.readfn = gt_sec_tval_read,
.writefn = gt_sec_tval_write,
.resetfn = gt_sec_timer_reset,
},
{ .name = "CNTPS_CTL_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 7, .crn = 14, .crm = 2, .opc2 = 1,
.type = ARM_CP_IO, .access = PL1_RW,
.accessfn = gt_stimer_access,
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_SEC].ctl),
.resetvalue = 0,
.writefn = gt_sec_ctl_write, .raw_writefn = raw_write,
},
{ .name = "CNTPS_CVAL_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 7, .crn = 14, .crm = 2, .opc2 = 2,
.type = ARM_CP_IO, .access = PL1_RW,
.accessfn = gt_stimer_access,
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_SEC].cval),
.writefn = gt_sec_cval_write, .raw_writefn = raw_write,
},
REGINFO_SENTINEL
};
#else
/* In user-mode none of the generic timer registers are accessible,
* and their implementation depends on QEMU_CLOCK_VIRTUAL and qdev gpio outputs,
* so instead just don't register any of them.
*/
static const ARMCPRegInfo generic_timer_cp_reginfo[] = {
REGINFO_SENTINEL
};
#endif
static void par_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
{
if (arm_feature(env, ARM_FEATURE_LPAE)) {
raw_write(env, ri, value);
} else if (arm_feature(env, ARM_FEATURE_V7)) {
raw_write(env, ri, value & 0xfffff6ff);
} else {
raw_write(env, ri, value & 0xfffff1ff);
}
}
#ifndef CONFIG_USER_ONLY
/* get_phys_addr() isn't present for user-mode-only targets */
static CPAccessResult ats_access(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
if (ri->opc2 & 4) {
/* The ATS12NSO* operations must trap to EL3 if executed in
* Secure EL1 (which can only happen if EL3 is AArch64).
* They are simply UNDEF if executed from NS EL1.
* They function normally from EL2 or EL3.
*/
if (arm_current_el(env) == 1) {
if (arm_is_secure_below_el3(env)) {
return CP_ACCESS_TRAP_UNCATEGORIZED_EL3;
}
return CP_ACCESS_TRAP_UNCATEGORIZED;
}
}
return CP_ACCESS_OK;
}
static uint64_t do_ats_write(CPUARMState *env, uint64_t value,
MMUAccessType access_type, ARMMMUIdx mmu_idx)
{
hwaddr phys_addr;
target_ulong page_size;
int prot;
bool ret;
uint64_t par64;
bool format64 = false;
MemTxAttrs attrs = {};
ARMMMUFaultInfo fi = {};
ARMCacheAttrs cacheattrs = {};
ret = get_phys_addr(env, value, access_type, mmu_idx, &phys_addr, &attrs,
&prot, &page_size, &fi, &cacheattrs);
if (is_a64(env)) {
format64 = true;
} else if (arm_feature(env, ARM_FEATURE_LPAE)) {
/*
* ATS1Cxx:
* * TTBCR.EAE determines whether the result is returned using the
* 32-bit or the 64-bit PAR format
* * Instructions executed in Hyp mode always use the 64bit format
*
* ATS1S2NSOxx uses the 64bit format if any of the following is true:
* * The Non-secure TTBCR.EAE bit is set to 1
* * The implementation includes EL2, and the value of HCR.VM is 1
*
* ATS1Hx always uses the 64bit format (not supported yet).
*/
format64 = arm_s1_regime_using_lpae_format(env, mmu_idx);
if (arm_feature(env, ARM_FEATURE_EL2)) {
if (mmu_idx == ARMMMUIdx_S12NSE0 || mmu_idx == ARMMMUIdx_S12NSE1) {
format64 |= env->cp15.hcr_el2 & HCR_VM;
} else {
format64 |= arm_current_el(env) == 2;
}
}
}
if (format64) {
/* Create a 64-bit PAR */
par64 = (1 << 11); /* LPAE bit always set */
if (!ret) {
par64 |= phys_addr & ~0xfffULL;
if (!attrs.secure) {
par64 |= (1 << 9); /* NS */
}
par64 |= (uint64_t)cacheattrs.attrs << 56; /* ATTR */
par64 |= cacheattrs.shareability << 7; /* SH */
} else {
uint32_t fsr = arm_fi_to_lfsc(&fi);
par64 |= 1; /* F */
par64 |= (fsr & 0x3f) << 1; /* FS */
/* Note that S2WLK and FSTAGE are always zero, because we don't
* implement virtualization and therefore there can't be a stage 2
* fault.
*/
}
} else {
/* fsr is a DFSR/IFSR value for the short descriptor
* translation table format (with WnR always clear).
* Convert it to a 32-bit PAR.
*/
if (!ret) {
/* We do not set any attribute bits in the PAR */
if (page_size == (1 << 24)
&& arm_feature(env, ARM_FEATURE_V7)) {
par64 = (phys_addr & 0xff000000) | (1 << 1);
} else {
par64 = phys_addr & 0xfffff000;
}
if (!attrs.secure) {
par64 |= (1 << 9); /* NS */
}
} else {
uint32_t fsr = arm_fi_to_sfsc(&fi);
par64 = ((fsr & (1 << 10)) >> 5) | ((fsr & (1 << 12)) >> 6) |
((fsr & 0xf) << 1) | 1;
}
}
return par64;
}
static void ats_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
{
MMUAccessType access_type = ri->opc2 & 1 ? MMU_DATA_STORE : MMU_DATA_LOAD;
uint64_t par64;
ARMMMUIdx mmu_idx;
int el = arm_current_el(env);
bool secure = arm_is_secure_below_el3(env);
switch (ri->opc2 & 6) {
case 0:
/* stage 1 current state PL1: ATS1CPR, ATS1CPW */
switch (el) {
case 3:
mmu_idx = ARMMMUIdx_S1E3;
break;
case 2:
mmu_idx = ARMMMUIdx_S1NSE1;
break;
case 1:
mmu_idx = secure ? ARMMMUIdx_S1SE1 : ARMMMUIdx_S1NSE1;
break;
default:
g_assert_not_reached();
}
break;
case 2:
/* stage 1 current state PL0: ATS1CUR, ATS1CUW */
switch (el) {
case 3:
mmu_idx = ARMMMUIdx_S1SE0;
break;
case 2:
mmu_idx = ARMMMUIdx_S1NSE0;
break;
case 1:
mmu_idx = secure ? ARMMMUIdx_S1SE0 : ARMMMUIdx_S1NSE0;
break;
default:
g_assert_not_reached();
}
break;
case 4:
/* stage 1+2 NonSecure PL1: ATS12NSOPR, ATS12NSOPW */
mmu_idx = ARMMMUIdx_S12NSE1;
break;
case 6:
/* stage 1+2 NonSecure PL0: ATS12NSOUR, ATS12NSOUW */
mmu_idx = ARMMMUIdx_S12NSE0;
break;
default:
g_assert_not_reached();
}
par64 = do_ats_write(env, value, access_type, mmu_idx);
A32_BANKED_CURRENT_REG_SET(env, par, par64);
}
static void ats1h_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
MMUAccessType access_type = ri->opc2 & 1 ? MMU_DATA_STORE : MMU_DATA_LOAD;
uint64_t par64;
par64 = do_ats_write(env, value, access_type, ARMMMUIdx_S2NS);
A32_BANKED_CURRENT_REG_SET(env, par, par64);
}
static CPAccessResult at_s1e2_access(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
if (arm_current_el(env) == 3 && !(env->cp15.scr_el3 & SCR_NS)) {
return CP_ACCESS_TRAP;
}
return CP_ACCESS_OK;
}
static void ats_write64(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
MMUAccessType access_type = ri->opc2 & 1 ? MMU_DATA_STORE : MMU_DATA_LOAD;
ARMMMUIdx mmu_idx;
int secure = arm_is_secure_below_el3(env);
switch (ri->opc2 & 6) {
case 0:
switch (ri->opc1) {
case 0: /* AT S1E1R, AT S1E1W */
mmu_idx = secure ? ARMMMUIdx_S1SE1 : ARMMMUIdx_S1NSE1;
break;
case 4: /* AT S1E2R, AT S1E2W */
mmu_idx = ARMMMUIdx_S1E2;
break;
case 6: /* AT S1E3R, AT S1E3W */
mmu_idx = ARMMMUIdx_S1E3;
break;
default:
g_assert_not_reached();
}
break;
case 2: /* AT S1E0R, AT S1E0W */
mmu_idx = secure ? ARMMMUIdx_S1SE0 : ARMMMUIdx_S1NSE0;
break;
case 4: /* AT S12E1R, AT S12E1W */
mmu_idx = secure ? ARMMMUIdx_S1SE1 : ARMMMUIdx_S12NSE1;
break;
case 6: /* AT S12E0R, AT S12E0W */
mmu_idx = secure ? ARMMMUIdx_S1SE0 : ARMMMUIdx_S12NSE0;
break;
default:
g_assert_not_reached();
}
env->cp15.par_el[1] = do_ats_write(env, value, access_type, mmu_idx);
}
#endif
static const ARMCPRegInfo vapa_cp_reginfo[] = {
{ .name = "PAR", .cp = 15, .crn = 7, .crm = 4, .opc1 = 0, .opc2 = 0,
.access = PL1_RW, .resetvalue = 0,
.bank_fieldoffsets = { offsetoflow32(CPUARMState, cp15.par_s),
offsetoflow32(CPUARMState, cp15.par_ns) },
.writefn = par_write },
#ifndef CONFIG_USER_ONLY
/* This underdecoding is safe because the reginfo is NO_RAW. */
{ .name = "ATS", .cp = 15, .crn = 7, .crm = 8, .opc1 = 0, .opc2 = CP_ANY,
.access = PL1_W, .accessfn = ats_access,
.writefn = ats_write, .type = ARM_CP_NO_RAW },
#endif
REGINFO_SENTINEL
};
/* Return basic MPU access permission bits. */
static uint32_t simple_mpu_ap_bits(uint32_t val)
{
uint32_t ret;
uint32_t mask;
int i;
ret = 0;
mask = 3;
for (i = 0; i < 16; i += 2) {
ret |= (val >> i) & mask;
mask <<= 2;
}
return ret;
}
/* Pad basic MPU access permission bits to extended format. */
static uint32_t extended_mpu_ap_bits(uint32_t val)
{
uint32_t ret;
uint32_t mask;
int i;
ret = 0;
mask = 3;
for (i = 0; i < 16; i += 2) {
ret |= (val & mask) << i;
mask <<= 2;
}
return ret;
}
static void pmsav5_data_ap_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
env->cp15.pmsav5_data_ap = extended_mpu_ap_bits(value);
}
static uint64_t pmsav5_data_ap_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
return simple_mpu_ap_bits(env->cp15.pmsav5_data_ap);
}
static void pmsav5_insn_ap_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
env->cp15.pmsav5_insn_ap = extended_mpu_ap_bits(value);
}
static uint64_t pmsav5_insn_ap_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
return simple_mpu_ap_bits(env->cp15.pmsav5_insn_ap);
}
static uint64_t pmsav7_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
uint32_t *u32p = *(uint32_t **)raw_ptr(env, ri);
if (!u32p) {
return 0;
}
u32p += env->pmsav7.rnr[M_REG_NS];
return *u32p;
}
static void pmsav7_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
ARMCPU *cpu = arm_env_get_cpu(env);
uint32_t *u32p = *(uint32_t **)raw_ptr(env, ri);
if (!u32p) {
return;
}
u32p += env->pmsav7.rnr[M_REG_NS];
tlb_flush(CPU(cpu)); /* Mappings may have changed - purge! */
*u32p = value;
}
static void pmsav7_rgnr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
ARMCPU *cpu = arm_env_get_cpu(env);
uint32_t nrgs = cpu->pmsav7_dregion;
if (value >= nrgs) {
qemu_log_mask(LOG_GUEST_ERROR,
"PMSAv7 RGNR write >= # supported regions, %" PRIu32
" > %" PRIu32 "\n", (uint32_t)value, nrgs);
return;
}
raw_write(env, ri, value);
}
static const ARMCPRegInfo pmsav7_cp_reginfo[] = {
/* Reset for all these registers is handled in arm_cpu_reset(),
* because the PMSAv7 is also used by M-profile CPUs, which do
* not register cpregs but still need the state to be reset.
*/
{ .name = "DRBAR", .cp = 15, .crn = 6, .opc1 = 0, .crm = 1, .opc2 = 0,
.access = PL1_RW, .type = ARM_CP_NO_RAW,
.fieldoffset = offsetof(CPUARMState, pmsav7.drbar),
.readfn = pmsav7_read, .writefn = pmsav7_write,
.resetfn = arm_cp_reset_ignore },
{ .name = "DRSR", .cp = 15, .crn = 6, .opc1 = 0, .crm = 1, .opc2 = 2,
.access = PL1_RW, .type = ARM_CP_NO_RAW,
.fieldoffset = offsetof(CPUARMState, pmsav7.drsr),
.readfn = pmsav7_read, .writefn = pmsav7_write,
.resetfn = arm_cp_reset_ignore },
{ .name = "DRACR", .cp = 15, .crn = 6, .opc1 = 0, .crm = 1, .opc2 = 4,
.access = PL1_RW, .type = ARM_CP_NO_RAW,
.fieldoffset = offsetof(CPUARMState, pmsav7.dracr),
.readfn = pmsav7_read, .writefn = pmsav7_write,
.resetfn = arm_cp_reset_ignore },
{ .name = "RGNR", .cp = 15, .crn = 6, .opc1 = 0, .crm = 2, .opc2 = 0,
.access = PL1_RW,
.fieldoffset = offsetof(CPUARMState, pmsav7.rnr[M_REG_NS]),
.writefn = pmsav7_rgnr_write,
.resetfn = arm_cp_reset_ignore },
REGINFO_SENTINEL
};
static const ARMCPRegInfo pmsav5_cp_reginfo[] = {
{ .name = "DATA_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 0,
.access = PL1_RW, .type = ARM_CP_ALIAS,
.fieldoffset = offsetof(CPUARMState, cp15.pmsav5_data_ap),
.readfn = pmsav5_data_ap_read, .writefn = pmsav5_data_ap_write, },
{ .name = "INSN_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 1,
.access = PL1_RW, .type = ARM_CP_ALIAS,
.fieldoffset = offsetof(CPUARMState, cp15.pmsav5_insn_ap),
.readfn = pmsav5_insn_ap_read, .writefn = pmsav5_insn_ap_write, },
{ .name = "DATA_EXT_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 2,
.access = PL1_RW,
.fieldoffset = offsetof(CPUARMState, cp15.pmsav5_data_ap),
.resetvalue = 0, },
{ .name = "INSN_EXT_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 3,
.access = PL1_RW,
.fieldoffset = offsetof(CPUARMState, cp15.pmsav5_insn_ap),
.resetvalue = 0, },
{ .name = "DCACHE_CFG", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 0,
.access = PL1_RW,
.fieldoffset = offsetof(CPUARMState, cp15.c2_data), .resetvalue = 0, },
{ .name = "ICACHE_CFG", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 1,
.access = PL1_RW,
.fieldoffset = offsetof(CPUARMState, cp15.c2_insn), .resetvalue = 0, },
/* Protection region base and size registers */
{ .name = "946_PRBS0", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0,
.opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
.fieldoffset = offsetof(CPUARMState, cp15.c6_region[0]) },
{ .name = "946_PRBS1", .cp = 15, .crn = 6, .crm = 1, .opc1 = 0,
.opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
.fieldoffset = offsetof(CPUARMState, cp15.c6_region[1]) },
{ .name = "946_PRBS2", .cp = 15, .crn = 6, .crm = 2, .opc1 = 0,
.opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
.fieldoffset = offsetof(CPUARMState, cp15.c6_region[2]) },
{ .name = "946_PRBS3", .cp = 15, .crn = 6, .crm = 3, .opc1 = 0,
.opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
.fieldoffset = offsetof(CPUARMState, cp15.c6_region[3]) },
{ .name = "946_PRBS4", .cp = 15, .crn = 6, .crm = 4, .opc1 = 0,
.opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
.fieldoffset = offsetof(CPUARMState, cp15.c6_region[4]) },
{ .name = "946_PRBS5", .cp = 15, .crn = 6, .crm = 5, .opc1 = 0,
.opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
.fieldoffset = offsetof(CPUARMState, cp15.c6_region[5]) },
{ .name = "946_PRBS6", .cp = 15, .crn = 6, .crm = 6, .opc1 = 0,
.opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
.fieldoffset = offsetof(CPUARMState, cp15.c6_region[6]) },
{ .name = "946_PRBS7", .cp = 15, .crn = 6, .crm = 7, .opc1 = 0,
.opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
.fieldoffset = offsetof(CPUARMState, cp15.c6_region[7]) },
REGINFO_SENTINEL
};
static void vmsa_ttbcr_raw_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
TCR *tcr = raw_ptr(env, ri);
int maskshift = extract32(value, 0, 3);
if (!arm_feature(env, ARM_FEATURE_V8)) {
if (arm_feature(env, ARM_FEATURE_LPAE) && (value & TTBCR_EAE)) {
/* Pre ARMv8 bits [21:19], [15:14] and [6:3] are UNK/SBZP when
* using Long-desciptor translation table format */
value &= ~((7 << 19) | (3 << 14) | (0xf << 3));
} else if (arm_feature(env, ARM_FEATURE_EL3)) {
/* In an implementation that includes the Security Extensions
* TTBCR has additional fields PD0 [4] and PD1 [5] for
* Short-descriptor translation table format.
*/
value &= TTBCR_PD1 | TTBCR_PD0 | TTBCR_N;
} else {
value &= TTBCR_N;
}
}
/* Update the masks corresponding to the TCR bank being written
* Note that we always calculate mask and base_mask, but
* they are only used for short-descriptor tables (ie if EAE is 0);
* for long-descriptor tables the TCR fields are used differently
* and the mask and base_mask values are meaningless.
*/
tcr->raw_tcr = value;
tcr->mask = ~(((uint32_t)0xffffffffu) >> maskshift);
tcr->base_mask = ~((uint32_t)0x3fffu >> maskshift);
}
static void vmsa_ttbcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
ARMCPU *cpu = arm_env_get_cpu(env);
if (arm_feature(env, ARM_FEATURE_LPAE)) {
/* With LPAE the TTBCR could result in a change of ASID
* via the TTBCR.A1 bit, so do a TLB flush.
*/
tlb_flush(CPU(cpu));
}
vmsa_ttbcr_raw_write(env, ri, value);
}
static void vmsa_ttbcr_reset(CPUARMState *env, const ARMCPRegInfo *ri)
{
TCR *tcr = raw_ptr(env, ri);
/* Reset both the TCR as well as the masks corresponding to the bank of
* the TCR being reset.
*/
tcr->raw_tcr = 0;
tcr->mask = 0;
tcr->base_mask = 0xffffc000u;
}
static void vmsa_tcr_el1_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
ARMCPU *cpu = arm_env_get_cpu(env);
TCR *tcr = raw_ptr(env, ri);
/* For AArch64 the A1 bit could result in a change of ASID, so TLB flush. */
tlb_flush(CPU(cpu));
tcr->raw_tcr = value;
}
static void vmsa_ttbr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* 64 bit accesses to the TTBRs can change the ASID and so we
* must flush the TLB.
*/
if (cpreg_field_is_64bit(ri)) {
ARMCPU *cpu = arm_env_get_cpu(env);
tlb_flush(CPU(cpu));
}
raw_write(env, ri, value);
}
static void vttbr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
ARMCPU *cpu = arm_env_get_cpu(env);
CPUState *cs = CPU(cpu);
/* Accesses to VTTBR may change the VMID so we must flush the TLB. */
if (raw_read(env, ri) != value) {
tlb_flush_by_mmuidx(cs,
ARMMMUIdxBit_S12NSE1 |
ARMMMUIdxBit_S12NSE0 |
ARMMMUIdxBit_S2NS);
raw_write(env, ri, value);
}
}
static const ARMCPRegInfo vmsa_pmsa_cp_reginfo[] = {
{ .name = "DFSR", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 0,
.access = PL1_RW, .type = ARM_CP_ALIAS,
.bank_fieldoffsets = { offsetoflow32(CPUARMState, cp15.dfsr_s),
offsetoflow32(CPUARMState, cp15.dfsr_ns) }, },
{ .name = "IFSR", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 1,
.access = PL1_RW, .resetvalue = 0,
.bank_fieldoffsets = { offsetoflow32(CPUARMState, cp15.ifsr_s),
offsetoflow32(CPUARMState, cp15.ifsr_ns) } },
{ .name = "DFAR", .cp = 15, .opc1 = 0, .crn = 6, .crm = 0, .opc2 = 0,
.access = PL1_RW, .resetvalue = 0,
.bank_fieldoffsets = { offsetof(CPUARMState, cp15.dfar_s),
offsetof(CPUARMState, cp15.dfar_ns) } },
{ .name = "FAR_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 0,
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.far_el[1]),
.resetvalue = 0, },
REGINFO_SENTINEL
};
static const ARMCPRegInfo vmsa_cp_reginfo[] = {
{ .name = "ESR_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .crn = 5, .crm = 2, .opc1 = 0, .opc2 = 0,
.access = PL1_RW,
.fieldoffset = offsetof(CPUARMState, cp15.esr_el[1]), .resetvalue = 0, },
{ .name = "TTBR0_EL1", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 2, .crm = 0, .opc2 = 0,
.access = PL1_RW, .writefn = vmsa_ttbr_write, .resetvalue = 0,
.bank_fieldoffsets = { offsetof(CPUARMState, cp15.ttbr0_s),
offsetof(CPUARMState, cp15.ttbr0_ns) } },
{ .name = "TTBR1_EL1", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 2, .crm = 0, .opc2 = 1,
.access = PL1_RW, .writefn = vmsa_ttbr_write, .resetvalue = 0,
.bank_fieldoffsets = { offsetof(CPUARMState, cp15.ttbr1_s),
offsetof(CPUARMState, cp15.ttbr1_ns) } },
{ .name = "TCR_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 2,
.access = PL1_RW, .writefn = vmsa_tcr_el1_write,
.resetfn = vmsa_ttbcr_reset, .raw_writefn = raw_write,
.fieldoffset = offsetof(CPUARMState, cp15.tcr_el[1]) },
{ .name = "TTBCR", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 2,
.access = PL1_RW, .type = ARM_CP_ALIAS, .writefn = vmsa_ttbcr_write,
.raw_writefn = vmsa_ttbcr_raw_write,
.bank_fieldoffsets = { offsetoflow32(CPUARMState, cp15.tcr_el[3]),
offsetoflow32(CPUARMState, cp15.tcr_el[1])} },
REGINFO_SENTINEL
};
static void omap_ticonfig_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
env->cp15.c15_ticonfig = value & 0xe7;
/* The OS_TYPE bit in this register changes the reported CPUID! */
env->cp15.c0_cpuid = (value & (1 << 5)) ?
ARM_CPUID_TI915T : ARM_CPUID_TI925T;
}
static void omap_threadid_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
env->cp15.c15_threadid = value & 0xffff;
}
static void omap_wfi_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* Wait-for-interrupt (deprecated) */
cpu_interrupt(CPU(arm_env_get_cpu(env)), CPU_INTERRUPT_HALT);
}
static void omap_cachemaint_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* On OMAP there are registers indicating the max/min index of dcache lines
* containing a dirty line; cache flush operations have to reset these.
*/
env->cp15.c15_i_max = 0x000;
env->cp15.c15_i_min = 0xff0;
}
static const ARMCPRegInfo omap_cp_reginfo[] = {
{ .name = "DFSR", .cp = 15, .crn = 5, .crm = CP_ANY,
.opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, .type = ARM_CP_OVERRIDE,
.fieldoffset = offsetoflow32(CPUARMState, cp15.esr_el[1]),
.resetvalue = 0, },
{ .name = "", .cp = 15, .crn = 15, .crm = 0, .opc1 = 0, .opc2 = 0,
.access = PL1_RW, .type = ARM_CP_NOP },
{ .name = "TICONFIG", .cp = 15, .crn = 15, .crm = 1, .opc1 = 0, .opc2 = 0,
.access = PL1_RW,
.fieldoffset = offsetof(CPUARMState, cp15.c15_ticonfig), .resetvalue = 0,
.writefn = omap_ticonfig_write },
{ .name = "IMAX", .cp = 15, .crn = 15, .crm = 2, .opc1 = 0, .opc2 = 0,
.access = PL1_RW,
.fieldoffset = offsetof(CPUARMState, cp15.c15_i_max), .resetvalue = 0, },
{ .name = "IMIN", .cp = 15, .crn = 15, .crm = 3, .opc1 = 0, .opc2 = 0,
.access = PL1_RW, .resetvalue = 0xff0,
.fieldoffset = offsetof(CPUARMState, cp15.c15_i_min) },
{ .name = "THREADID", .cp = 15, .crn = 15, .crm = 4, .opc1 = 0, .opc2 = 0,
.access = PL1_RW,
.fieldoffset = offsetof(CPUARMState, cp15.c15_threadid), .resetvalue = 0,
.writefn = omap_threadid_write },
{ .name = "TI925T_STATUS", .cp = 15, .crn = 15,
.crm = 8, .opc1 = 0, .opc2 = 0, .access = PL1_RW,
.type = ARM_CP_NO_RAW,
.readfn = arm_cp_read_zero, .writefn = omap_wfi_write, },
/* TODO: Peripheral port remap register:
* On OMAP2 mcr p15, 0, rn, c15, c2, 4 sets up the interrupt controller
* base address at $rn & ~0xfff and map size of 0x200 << ($rn & 0xfff),
* when MMU is off.
*/
{ .name = "OMAP_CACHEMAINT", .cp = 15, .crn = 7, .crm = CP_ANY,
.opc1 = 0, .opc2 = CP_ANY, .access = PL1_W,
.type = ARM_CP_OVERRIDE | ARM_CP_NO_RAW,
.writefn = omap_cachemaint_write },
{ .name = "C9", .cp = 15, .crn = 9,
.crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW,
.type = ARM_CP_CONST | ARM_CP_OVERRIDE, .resetvalue = 0 },
REGINFO_SENTINEL
};
static void xscale_cpar_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
env->cp15.c15_cpar = value & 0x3fff;
}
static const ARMCPRegInfo xscale_cp_reginfo[] = {
{ .name = "XSCALE_CPAR",
.cp = 15, .crn = 15, .crm = 1, .opc1 = 0, .opc2 = 0, .access = PL1_RW,
.fieldoffset = offsetof(CPUARMState, cp15.c15_cpar), .resetvalue = 0,
.writefn = xscale_cpar_write, },
{ .name = "XSCALE_AUXCR",
.cp = 15, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 1, .access = PL1_RW,
.fieldoffset = offsetof(CPUARMState, cp15.c1_xscaleauxcr),
.resetvalue = 0, },
/* XScale specific cache-lockdown: since we have no cache we NOP these
* and hope the guest does not really rely on cache behaviour.
*/
{ .name = "XSCALE_LOCK_ICACHE_LINE",
.cp = 15, .opc1 = 0, .crn = 9, .crm = 1, .opc2 = 0,
.access = PL1_W, .type = ARM_CP_NOP },
{ .name = "XSCALE_UNLOCK_ICACHE",
.cp = 15, .opc1 = 0, .crn = 9, .crm = 1, .opc2 = 1,
.access = PL1_W, .type = ARM_CP_NOP },
{ .name = "XSCALE_DCACHE_LOCK",
.cp = 15, .opc1 = 0, .crn = 9, .crm = 2, .opc2 = 0,
.access = PL1_RW, .type = ARM_CP_NOP },
{ .name = "XSCALE_UNLOCK_DCACHE",
.cp = 15, .opc1 = 0, .crn = 9, .crm = 2, .opc2 = 1,
.access = PL1_W, .type = ARM_CP_NOP },
REGINFO_SENTINEL
};
static const ARMCPRegInfo dummy_c15_cp_reginfo[] = {
/* RAZ/WI the whole crn=15 space, when we don't have a more specific
* implementation of this implementation-defined space.
* Ideally this should eventually disappear in favour of actually
* implementing the correct behaviour for all cores.
*/
{ .name = "C15_IMPDEF", .cp = 15, .crn = 15,
.crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY,
.access = PL1_RW,
.type = ARM_CP_CONST | ARM_CP_NO_RAW | ARM_CP_OVERRIDE,
.resetvalue = 0 },
REGINFO_SENTINEL
};
static const ARMCPRegInfo cache_dirty_status_cp_reginfo[] = {
/* Cache status: RAZ because we have no cache so it's always clean */
{ .name = "CDSR", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 6,
.access = PL1_R, .type = ARM_CP_CONST | ARM_CP_NO_RAW,
.resetvalue = 0 },
REGINFO_SENTINEL
};
static const ARMCPRegInfo cache_block_ops_cp_reginfo[] = {
/* We never have a a block transfer operation in progress */
{ .name = "BXSR", .cp = 15, .crn = 7, .crm = 12, .opc1 = 0, .opc2 = 4,
.access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_RAW,
.resetvalue = 0 },
/* The cache ops themselves: these all NOP for QEMU */
{ .name = "IICR", .cp = 15, .crm = 5, .opc1 = 0,
.access = PL1_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
{ .name = "IDCR", .cp = 15, .crm = 6, .opc1 = 0,
.access = PL1_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
{ .name = "CDCR", .cp = 15, .crm = 12, .opc1 = 0,
.access = PL0_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
{ .name = "PIR", .cp = 15, .crm = 12, .opc1 = 1,
.access = PL0_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
{ .name = "PDR", .cp = 15, .crm = 12, .opc1 = 2,
.access = PL0_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
{ .name = "CIDCR", .cp = 15, .crm = 14, .opc1 = 0,
.access = PL1_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
REGINFO_SENTINEL
};
static const ARMCPRegInfo cache_test_clean_cp_reginfo[] = {
/* The cache test-and-clean instructions always return (1 << 30)
* to indicate that there are no dirty cache lines.
*/
{ .name = "TC_DCACHE", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 3,
.access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_RAW,
.resetvalue = (1 << 30) },
{ .name = "TCI_DCACHE", .cp = 15, .crn = 7, .crm = 14, .opc1 = 0, .opc2 = 3,
.access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_RAW,
.resetvalue = (1 << 30) },
REGINFO_SENTINEL
};
static const ARMCPRegInfo strongarm_cp_reginfo[] = {
/* Ignore ReadBuffer accesses */
{ .name = "C9_READBUFFER", .cp = 15, .crn = 9,
.crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY,
.access = PL1_RW, .resetvalue = 0,
.type = ARM_CP_CONST | ARM_CP_OVERRIDE | ARM_CP_NO_RAW },
REGINFO_SENTINEL
};
static uint64_t midr_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
ARMCPU *cpu = arm_env_get_cpu(env);
unsigned int cur_el = arm_current_el(env);
bool secure = arm_is_secure(env);
if (arm_feature(&cpu->env, ARM_FEATURE_EL2) && !secure && cur_el == 1) {
return env->cp15.vpidr_el2;
}
return raw_read(env, ri);
}
static uint64_t mpidr_read_val(CPUARMState *env)
{
ARMCPU *cpu = ARM_CPU(arm_env_get_cpu(env));
uint64_t mpidr = cpu->mp_affinity;
if (arm_feature(env, ARM_FEATURE_V7MP)) {
mpidr |= (1U << 31);
/* Cores which are uniprocessor (non-coherent)
* but still implement the MP extensions set
* bit 30. (For instance, Cortex-R5).
*/
if (cpu->mp_is_up) {
mpidr |= (1u << 30);
}
}
return mpidr;
}
static uint64_t mpidr_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
unsigned int cur_el = arm_current_el(env);
bool secure = arm_is_secure(env);
if (arm_feature(env, ARM_FEATURE_EL2) && !secure && cur_el == 1) {
return env->cp15.vmpidr_el2;
}
return mpidr_read_val(env);
}
static const ARMCPRegInfo mpidr_cp_reginfo[] = {
{ .name = "MPIDR", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 5,
.access = PL1_R, .readfn = mpidr_read, .type = ARM_CP_NO_RAW },
REGINFO_SENTINEL
};
static const ARMCPRegInfo lpae_cp_reginfo[] = {
/* NOP AMAIR0/1 */
{ .name = "AMAIR0", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .crn = 10, .crm = 3, .opc1 = 0, .opc2 = 0,
.access = PL1_RW, .type = ARM_CP_CONST,
.resetvalue = 0 },
/* AMAIR1 is mapped to AMAIR_EL1[63:32] */
{ .name = "AMAIR1", .cp = 15, .crn = 10, .crm = 3, .opc1 = 0, .opc2 = 1,
.access = PL1_RW, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "PAR", .cp = 15, .crm = 7, .opc1 = 0,
.access = PL1_RW, .type = ARM_CP_64BIT, .resetvalue = 0,
.bank_fieldoffsets = { offsetof(CPUARMState, cp15.par_s),
offsetof(CPUARMState, cp15.par_ns)} },
{ .name = "TTBR0", .cp = 15, .crm = 2, .opc1 = 0,
.access = PL1_RW, .type = ARM_CP_64BIT | ARM_CP_ALIAS,
.bank_fieldoffsets = { offsetof(CPUARMState, cp15.ttbr0_s),
offsetof(CPUARMState, cp15.ttbr0_ns) },
.writefn = vmsa_ttbr_write, },
{ .name = "TTBR1", .cp = 15, .crm = 2, .opc1 = 1,
.access = PL1_RW, .type = ARM_CP_64BIT | ARM_CP_ALIAS,
.bank_fieldoffsets = { offsetof(CPUARMState, cp15.ttbr1_s),
offsetof(CPUARMState, cp15.ttbr1_ns) },
.writefn = vmsa_ttbr_write, },
REGINFO_SENTINEL
};
static uint64_t aa64_fpcr_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
return vfp_get_fpcr(env);
}
static void aa64_fpcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
vfp_set_fpcr(env, value);
}
static uint64_t aa64_fpsr_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
return vfp_get_fpsr(env);
}
static void aa64_fpsr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
vfp_set_fpsr(env, value);
}
static CPAccessResult aa64_daif_access(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
if (arm_current_el(env) == 0 && !(env->cp15.sctlr_el[1] & SCTLR_UMA)) {
return CP_ACCESS_TRAP;
}
return CP_ACCESS_OK;
}
static void aa64_daif_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
env->daif = value & PSTATE_DAIF;
}
static CPAccessResult aa64_cacheop_access(CPUARMState *env,
const ARMCPRegInfo *ri,
bool isread)
{
/* Cache invalidate/clean: NOP, but EL0 must UNDEF unless
* SCTLR_EL1.UCI is set.
*/
if (arm_current_el(env) == 0 && !(env->cp15.sctlr_el[1] & SCTLR_UCI)) {
return CP_ACCESS_TRAP;
}
return CP_ACCESS_OK;
}
/* See: D4.7.2 TLB maintenance requirements and the TLB maintenance instructions
* Page D4-1736 (DDI0487A.b)
*/
static void tlbi_aa64_vmalle1_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = ENV_GET_CPU(env);
if (arm_is_secure_below_el3(env)) {
tlb_flush_by_mmuidx(cs,
ARMMMUIdxBit_S1SE1 |
ARMMMUIdxBit_S1SE0);
} else {
tlb_flush_by_mmuidx(cs,
ARMMMUIdxBit_S12NSE1 |
ARMMMUIdxBit_S12NSE0);
}
}
static void tlbi_aa64_vmalle1is_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = ENV_GET_CPU(env);
bool sec = arm_is_secure_below_el3(env);
if (sec) {
tlb_flush_by_mmuidx_all_cpus_synced(cs,
ARMMMUIdxBit_S1SE1 |
ARMMMUIdxBit_S1SE0);
} else {
tlb_flush_by_mmuidx_all_cpus_synced(cs,
ARMMMUIdxBit_S12NSE1 |
ARMMMUIdxBit_S12NSE0);
}
}
static void tlbi_aa64_alle1_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* Note that the 'ALL' scope must invalidate both stage 1 and
* stage 2 translations, whereas most other scopes only invalidate
* stage 1 translations.
*/
ARMCPU *cpu = arm_env_get_cpu(env);
CPUState *cs = CPU(cpu);
if (arm_is_secure_below_el3(env)) {
tlb_flush_by_mmuidx(cs,
ARMMMUIdxBit_S1SE1 |
ARMMMUIdxBit_S1SE0);
} else {
if (arm_feature(env, ARM_FEATURE_EL2)) {
tlb_flush_by_mmuidx(cs,
ARMMMUIdxBit_S12NSE1 |
ARMMMUIdxBit_S12NSE0 |
ARMMMUIdxBit_S2NS);
} else {
tlb_flush_by_mmuidx(cs,
ARMMMUIdxBit_S12NSE1 |
ARMMMUIdxBit_S12NSE0);
}
}
}
static void tlbi_aa64_alle2_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
ARMCPU *cpu = arm_env_get_cpu(env);
CPUState *cs = CPU(cpu);
tlb_flush_by_mmuidx(cs, ARMMMUIdxBit_S1E2);
}
static void tlbi_aa64_alle3_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
ARMCPU *cpu = arm_env_get_cpu(env);
CPUState *cs = CPU(cpu);
tlb_flush_by_mmuidx(cs, ARMMMUIdxBit_S1E3);
}
static void tlbi_aa64_alle1is_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* Note that the 'ALL' scope must invalidate both stage 1 and
* stage 2 translations, whereas most other scopes only invalidate
* stage 1 translations.
*/
CPUState *cs = ENV_GET_CPU(env);
bool sec = arm_is_secure_below_el3(env);
bool has_el2 = arm_feature(env, ARM_FEATURE_EL2);
if (sec) {
tlb_flush_by_mmuidx_all_cpus_synced(cs,
ARMMMUIdxBit_S1SE1 |
ARMMMUIdxBit_S1SE0);
} else if (has_el2) {
tlb_flush_by_mmuidx_all_cpus_synced(cs,
ARMMMUIdxBit_S12NSE1 |
ARMMMUIdxBit_S12NSE0 |
ARMMMUIdxBit_S2NS);
} else {
tlb_flush_by_mmuidx_all_cpus_synced(cs,
ARMMMUIdxBit_S12NSE1 |
ARMMMUIdxBit_S12NSE0);
}
}
static void tlbi_aa64_alle2is_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = ENV_GET_CPU(env);
tlb_flush_by_mmuidx_all_cpus_synced(cs, ARMMMUIdxBit_S1E2);
}
static void tlbi_aa64_alle3is_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = ENV_GET_CPU(env);
tlb_flush_by_mmuidx_all_cpus_synced(cs, ARMMMUIdxBit_S1E3);
}
static void tlbi_aa64_vae1_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* Invalidate by VA, EL1&0 (AArch64 version).
* Currently handles all of VAE1, VAAE1, VAALE1 and VALE1,
* since we don't support flush-for-specific-ASID-only or
* flush-last-level-only.
*/
ARMCPU *cpu = arm_env_get_cpu(env);
CPUState *cs = CPU(cpu);
uint64_t pageaddr = sextract64(value << 12, 0, 56);
if (arm_is_secure_below_el3(env)) {
tlb_flush_page_by_mmuidx(cs, pageaddr,
ARMMMUIdxBit_S1SE1 |
ARMMMUIdxBit_S1SE0);
} else {
tlb_flush_page_by_mmuidx(cs, pageaddr,
ARMMMUIdxBit_S12NSE1 |
ARMMMUIdxBit_S12NSE0);
}
}
static void tlbi_aa64_vae2_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* Invalidate by VA, EL2
* Currently handles both VAE2 and VALE2, since we don't support
* flush-last-level-only.
*/
ARMCPU *cpu = arm_env_get_cpu(env);
CPUState *cs = CPU(cpu);
uint64_t pageaddr = sextract64(value << 12, 0, 56);
tlb_flush_page_by_mmuidx(cs, pageaddr, ARMMMUIdxBit_S1E2);
}
static void tlbi_aa64_vae3_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* Invalidate by VA, EL3
* Currently handles both VAE3 and VALE3, since we don't support
* flush-last-level-only.
*/
ARMCPU *cpu = arm_env_get_cpu(env);
CPUState *cs = CPU(cpu);
uint64_t pageaddr = sextract64(value << 12, 0, 56);
tlb_flush_page_by_mmuidx(cs, pageaddr, ARMMMUIdxBit_S1E3);
}
static void tlbi_aa64_vae1is_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
ARMCPU *cpu = arm_env_get_cpu(env);
CPUState *cs = CPU(cpu);
bool sec = arm_is_secure_below_el3(env);
uint64_t pageaddr = sextract64(value << 12, 0, 56);
if (sec) {
tlb_flush_page_by_mmuidx_all_cpus_synced(cs, pageaddr,
ARMMMUIdxBit_S1SE1 |
ARMMMUIdxBit_S1SE0);
} else {
tlb_flush_page_by_mmuidx_all_cpus_synced(cs, pageaddr,
ARMMMUIdxBit_S12NSE1 |
ARMMMUIdxBit_S12NSE0);
}
}
static void tlbi_aa64_vae2is_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = ENV_GET_CPU(env);
uint64_t pageaddr = sextract64(value << 12, 0, 56);
tlb_flush_page_by_mmuidx_all_cpus_synced(cs, pageaddr,
ARMMMUIdxBit_S1E2);
}
static void tlbi_aa64_vae3is_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = ENV_GET_CPU(env);
uint64_t pageaddr = sextract64(value << 12, 0, 56);
tlb_flush_page_by_mmuidx_all_cpus_synced(cs, pageaddr,
ARMMMUIdxBit_S1E3);
}
static void tlbi_aa64_ipas2e1_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* Invalidate by IPA. This has to invalidate any structures that
* contain only stage 2 translation information, but does not need
* to apply to structures that contain combined stage 1 and stage 2
* translation information.
* This must NOP if EL2 isn't implemented or SCR_EL3.NS is zero.
*/
ARMCPU *cpu = arm_env_get_cpu(env);
CPUState *cs = CPU(cpu);
uint64_t pageaddr;
if (!arm_feature(env, ARM_FEATURE_EL2) || !(env->cp15.scr_el3 & SCR_NS)) {
return;
}
pageaddr = sextract64(value << 12, 0, 48);
tlb_flush_page_by_mmuidx(cs, pageaddr, ARMMMUIdxBit_S2NS);
}
static void tlbi_aa64_ipas2e1is_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = ENV_GET_CPU(env);
uint64_t pageaddr;
if (!arm_feature(env, ARM_FEATURE_EL2) || !(env->cp15.scr_el3 & SCR_NS)) {
return;
}
pageaddr = sextract64(value << 12, 0, 48);
tlb_flush_page_by_mmuidx_all_cpus_synced(cs, pageaddr,
ARMMMUIdxBit_S2NS);
}
static CPAccessResult aa64_zva_access(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
/* We don't implement EL2, so the only control on DC ZVA is the
* bit in the SCTLR which can prohibit access for EL0.
*/
if (arm_current_el(env) == 0 && !(env->cp15.sctlr_el[1] & SCTLR_DZE)) {
return CP_ACCESS_TRAP;
}
return CP_ACCESS_OK;
}
static uint64_t aa64_dczid_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
ARMCPU *cpu = arm_env_get_cpu(env);
int dzp_bit = 1 << 4;
/* DZP indicates whether DC ZVA access is allowed */
if (aa64_zva_access(env, NULL, false) == CP_ACCESS_OK) {
dzp_bit = 0;
}
return cpu->dcz_blocksize | dzp_bit;
}
static CPAccessResult sp_el0_access(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
if (!(env->pstate & PSTATE_SP)) {
/* Access to SP_EL0 is undefined if it's being used as
* the stack pointer.
*/
return CP_ACCESS_TRAP_UNCATEGORIZED;
}
return CP_ACCESS_OK;
}
static uint64_t spsel_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
return env->pstate & PSTATE_SP;
}
static void spsel_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t val)
{
update_spsel(env, val);
}
static void sctlr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
ARMCPU *cpu = arm_env_get_cpu(env);
if (raw_read(env, ri) == value) {
/* Skip the TLB flush if nothing actually changed; Linux likes
* to do a lot of pointless SCTLR writes.
*/
return;
}
if (arm_feature(env, ARM_FEATURE_PMSA) && !cpu->has_mpu) {
/* M bit is RAZ/WI for PMSA with no MPU implemented */
value &= ~SCTLR_M;
}
raw_write(env, ri, value);
/* ??? Lots of these bits are not implemented. */
/* This may enable/disable the MMU, so do a TLB flush. */
tlb_flush(CPU(cpu));
}
static CPAccessResult fpexc32_access(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
if ((env->cp15.cptr_el[2] & CPTR_TFP) && arm_current_el(env) == 2) {
return CP_ACCESS_TRAP_FP_EL2;
}
if (env->cp15.cptr_el[3] & CPTR_TFP) {
return CP_ACCESS_TRAP_FP_EL3;
}
return CP_ACCESS_OK;
}
static void sdcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
env->cp15.mdcr_el3 = value & SDCR_VALID_MASK;
}
static const ARMCPRegInfo v8_cp_reginfo[] = {
/* Minimal set of EL0-visible registers. This will need to be expanded
* significantly for system emulation of AArch64 CPUs.
*/
{ .name = "NZCV", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .opc2 = 0, .crn = 4, .crm = 2,
.access = PL0_RW, .type = ARM_CP_NZCV },
{ .name = "DAIF", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .opc2 = 1, .crn = 4, .crm = 2,
.type = ARM_CP_NO_RAW,
.access = PL0_RW, .accessfn = aa64_daif_access,
.fieldoffset = offsetof(CPUARMState, daif),
.writefn = aa64_daif_write, .resetfn = arm_cp_reset_ignore },
{ .name = "FPCR", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .opc2 = 0, .crn = 4, .crm = 4,
.access = PL0_RW, .type = ARM_CP_FPU | ARM_CP_SUPPRESS_TB_END,
.readfn = aa64_fpcr_read, .writefn = aa64_fpcr_write },
{ .name = "FPSR", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .opc2 = 1, .crn = 4, .crm = 4,
.access = PL0_RW, .type = ARM_CP_FPU | ARM_CP_SUPPRESS_TB_END,
.readfn = aa64_fpsr_read, .writefn = aa64_fpsr_write },
{ .name = "DCZID_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .opc2 = 7, .crn = 0, .crm = 0,
.access = PL0_R, .type = ARM_CP_NO_RAW,
.readfn = aa64_dczid_read },
{ .name = "DC_ZVA", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 3, .crn = 7, .crm = 4, .opc2 = 1,
.access = PL0_W, .type = ARM_CP_DC_ZVA,
#ifndef CONFIG_USER_ONLY
/* Avoid overhead of an access check that always passes in user-mode */
.accessfn = aa64_zva_access,
#endif
},
{ .name = "CURRENTEL", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .opc2 = 2, .crn = 4, .crm = 2,
.access = PL1_R, .type = ARM_CP_CURRENTEL },
/* Cache ops: all NOPs since we don't emulate caches */
{ .name = "IC_IALLUIS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 7, .crm = 1, .opc2 = 0,
.access = PL1_W, .type = ARM_CP_NOP },
{ .name = "IC_IALLU", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 7, .crm = 5, .opc2 = 0,
.access = PL1_W, .type = ARM_CP_NOP },
{ .name = "IC_IVAU", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 3, .crn = 7, .crm = 5, .opc2 = 1,
.access = PL0_W, .type = ARM_CP_NOP,
.accessfn = aa64_cacheop_access },
{ .name = "DC_IVAC", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 7, .crm = 6, .opc2 = 1,
.access = PL1_W, .type = ARM_CP_NOP },
{ .name = "DC_ISW", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 7, .crm = 6, .opc2 = 2,
.access = PL1_W, .type = ARM_CP_NOP },
{ .name = "DC_CVAC", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 3, .crn = 7, .crm = 10, .opc2 = 1,
.access = PL0_W, .type = ARM_CP_NOP,
.accessfn = aa64_cacheop_access },
{ .name = "DC_CSW", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 7, .crm = 10, .opc2 = 2,
.access = PL1_W, .type = ARM_CP_NOP },
{ .name = "DC_CVAU", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 3, .crn = 7, .crm = 11, .opc2 = 1,
.access = PL0_W, .type = ARM_CP_NOP,
.accessfn = aa64_cacheop_access },
{ .name = "DC_CIVAC", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 3, .crn = 7, .crm = 14, .opc2 = 1,
.access = PL0_W, .type = ARM_CP_NOP,
.accessfn = aa64_cacheop_access },
{ .name = "DC_CISW", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 7, .crm = 14, .opc2 = 2,
.access = PL1_W, .type = ARM_CP_NOP },
/* TLBI operations */
{ .name = "TLBI_VMALLE1IS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 0,
.access = PL1_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_vmalle1is_write },
{ .name = "TLBI_VAE1IS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 1,
.access = PL1_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_vae1is_write },
{ .name = "TLBI_ASIDE1IS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 2,
.access = PL1_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_vmalle1is_write },
{ .name = "TLBI_VAAE1IS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 3,
.access = PL1_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_vae1is_write },
{ .name = "TLBI_VALE1IS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 5,
.access = PL1_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_vae1is_write },
{ .name = "TLBI_VAALE1IS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 7,
.access = PL1_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_vae1is_write },
{ .name = "TLBI_VMALLE1", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 0,
.access = PL1_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_vmalle1_write },
{ .name = "TLBI_VAE1", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 1,
.access = PL1_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_vae1_write },
{ .name = "TLBI_ASIDE1", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 2,
.access = PL1_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_vmalle1_write },
{ .name = "TLBI_VAAE1", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 3,
.access = PL1_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_vae1_write },
{ .name = "TLBI_VALE1", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 5,
.access = PL1_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_vae1_write },
{ .name = "TLBI_VAALE1", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 7,
.access = PL1_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_vae1_write },
{ .name = "TLBI_IPAS2E1IS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 0, .opc2 = 1,
.access = PL2_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_ipas2e1is_write },
{ .name = "TLBI_IPAS2LE1IS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 0, .opc2 = 5,
.access = PL2_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_ipas2e1is_write },
{ .name = "TLBI_ALLE1IS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 3, .opc2 = 4,
.access = PL2_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_alle1is_write },
{ .name = "TLBI_VMALLS12E1IS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 3, .opc2 = 6,
.access = PL2_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_alle1is_write },
{ .name = "TLBI_IPAS2E1", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 4, .opc2 = 1,
.access = PL2_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_ipas2e1_write },
{ .name = "TLBI_IPAS2LE1", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 4, .opc2 = 5,
.access = PL2_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_ipas2e1_write },
{ .name = "TLBI_ALLE1", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 7, .opc2 = 4,
.access = PL2_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_alle1_write },
{ .name = "TLBI_VMALLS12E1", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 7, .opc2 = 6,
.access = PL2_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_alle1is_write },
#ifndef CONFIG_USER_ONLY
/* 64 bit address translation operations */
{ .name = "AT_S1E1R", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 7, .crm = 8, .opc2 = 0,
.access = PL1_W, .type = ARM_CP_NO_RAW, .writefn = ats_write64 },
{ .name = "AT_S1E1W", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 7, .crm = 8, .opc2 = 1,
.access = PL1_W, .type = ARM_CP_NO_RAW, .writefn = ats_write64 },
{ .name = "AT_S1E0R", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 7, .crm = 8, .opc2 = 2,
.access = PL1_W, .type = ARM_CP_NO_RAW, .writefn = ats_write64 },
{ .name = "AT_S1E0W", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 7, .crm = 8, .opc2 = 3,
.access = PL1_W, .type = ARM_CP_NO_RAW, .writefn = ats_write64 },
{ .name = "AT_S12E1R", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 7, .crm = 8, .opc2 = 4,
.access = PL2_W, .type = ARM_CP_NO_RAW, .writefn = ats_write64 },
{ .name = "AT_S12E1W", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 7, .crm = 8, .opc2 = 5,
.access = PL2_W, .type = ARM_CP_NO_RAW, .writefn = ats_write64 },
{ .name = "AT_S12E0R", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 7, .crm = 8, .opc2 = 6,
.access = PL2_W, .type = ARM_CP_NO_RAW, .writefn = ats_write64 },
{ .name = "AT_S12E0W", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 7, .crm = 8, .opc2 = 7,
.access = PL2_W, .type = ARM_CP_NO_RAW, .writefn = ats_write64 },
/* AT S1E2* are elsewhere as they UNDEF from EL3 if EL2 is not present */
{ .name = "AT_S1E3R", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 6, .crn = 7, .crm = 8, .opc2 = 0,
.access = PL3_W, .type = ARM_CP_NO_RAW, .writefn = ats_write64 },
{ .name = "AT_S1E3W", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 6, .crn = 7, .crm = 8, .opc2 = 1,
.access = PL3_W, .type = ARM_CP_NO_RAW, .writefn = ats_write64 },
{ .name = "PAR_EL1", .state = ARM_CP_STATE_AA64,
.type = ARM_CP_ALIAS,
.opc0 = 3, .opc1 = 0, .crn = 7, .crm = 4, .opc2 = 0,
.access = PL1_RW, .resetvalue = 0,
.fieldoffset = offsetof(CPUARMState, cp15.par_el[1]),
.writefn = par_write },
#endif
/* TLB invalidate last level of translation table walk */
{ .name = "TLBIMVALIS", .cp = 15, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 5,
.type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbimva_is_write },
{ .name = "TLBIMVAALIS", .cp = 15, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 7,
.type = ARM_CP_NO_RAW, .access = PL1_W,
.writefn = tlbimvaa_is_write },
{ .name = "TLBIMVAL", .cp = 15, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 5,
.type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbimva_write },
{ .name = "TLBIMVAAL", .cp = 15, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 7,
.type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbimvaa_write },
{ .name = "TLBIMVALH", .cp = 15, .opc1 = 4, .crn = 8, .crm = 7, .opc2 = 5,
.type = ARM_CP_NO_RAW, .access = PL2_W,
.writefn = tlbimva_hyp_write },
{ .name = "TLBIMVALHIS",
.cp = 15, .opc1 = 4, .crn = 8, .crm = 3, .opc2 = 5,
.type = ARM_CP_NO_RAW, .access = PL2_W,
.writefn = tlbimva_hyp_is_write },
{ .name = "TLBIIPAS2",
.cp = 15, .opc1 = 4, .crn = 8, .crm = 4, .opc2 = 1,
.type = ARM_CP_NO_RAW, .access = PL2_W,
.writefn = tlbiipas2_write },
{ .name = "TLBIIPAS2IS",
.cp = 15, .opc1 = 4, .crn = 8, .crm = 0, .opc2 = 1,
.type = ARM_CP_NO_RAW, .access = PL2_W,
.writefn = tlbiipas2_is_write },
{ .name = "TLBIIPAS2L",
.cp = 15, .opc1 = 4, .crn = 8, .crm = 4, .opc2 = 5,
.type = ARM_CP_NO_RAW, .access = PL2_W,
.writefn = tlbiipas2_write },
{ .name = "TLBIIPAS2LIS",
.cp = 15, .opc1 = 4, .crn = 8, .crm = 0, .opc2 = 5,
.type = ARM_CP_NO_RAW, .access = PL2_W,
.writefn = tlbiipas2_is_write },
/* 32 bit cache operations */
{ .name = "ICIALLUIS", .cp = 15, .opc1 = 0, .crn = 7, .crm = 1, .opc2 = 0,
.type = ARM_CP_NOP, .access = PL1_W },
{ .name = "BPIALLUIS", .cp = 15, .opc1 = 0, .crn = 7, .crm = 1, .opc2 = 6,
.type = ARM_CP_NOP, .access = PL1_W },
{ .name = "ICIALLU", .cp = 15, .opc1 = 0, .crn = 7, .crm = 5, .opc2 = 0,
.type = ARM_CP_NOP, .access = PL1_W },
{ .name = "ICIMVAU", .cp = 15, .opc1 = 0, .crn = 7, .crm = 5, .opc2 = 1,
.type = ARM_CP_NOP, .access = PL1_W },
{ .name = "BPIALL", .cp = 15, .opc1 = 0, .crn = 7, .crm = 5, .opc2 = 6,
.type = ARM_CP_NOP, .access = PL1_W },
{ .name = "BPIMVA", .cp = 15, .opc1 = 0, .crn = 7, .crm = 5, .opc2 = 7,
.type = ARM_CP_NOP, .access = PL1_W },
{ .name = "DCIMVAC", .cp = 15, .opc1 = 0, .crn = 7, .crm = 6, .opc2 = 1,
.type = ARM_CP_NOP, .access = PL1_W },
{ .name = "DCISW", .cp = 15, .opc1 = 0, .crn = 7, .crm = 6, .opc2 = 2,
.type = ARM_CP_NOP, .access = PL1_W },
{ .name = "DCCMVAC", .cp = 15, .opc1 = 0, .crn = 7, .crm = 10, .opc2 = 1,
.type = ARM_CP_NOP, .access = PL1_W },
{ .name = "DCCSW", .cp = 15, .opc1 = 0, .crn = 7, .crm = 10, .opc2 = 2,
.type = ARM_CP_NOP, .access = PL1_W },
{ .name = "DCCMVAU", .cp = 15, .opc1 = 0, .crn = 7, .crm = 11, .opc2 = 1,
.type = ARM_CP_NOP, .access = PL1_W },
{ .name = "DCCIMVAC", .cp = 15, .opc1 = 0, .crn = 7, .crm = 14, .opc2 = 1,
.type = ARM_CP_NOP, .access = PL1_W },
{ .name = "DCCISW", .cp = 15, .opc1 = 0, .crn = 7, .crm = 14, .opc2 = 2,
.type = ARM_CP_NOP, .access = PL1_W },
/* MMU Domain access control / MPU write buffer control */
{ .name = "DACR", .cp = 15, .opc1 = 0, .crn = 3, .crm = 0, .opc2 = 0,
.access = PL1_RW, .resetvalue = 0,
.writefn = dacr_write, .raw_writefn = raw_write,
.bank_fieldoffsets = { offsetoflow32(CPUARMState, cp15.dacr_s),
offsetoflow32(CPUARMState, cp15.dacr_ns) } },
{ .name = "ELR_EL1", .state = ARM_CP_STATE_AA64,
.type = ARM_CP_ALIAS,
.opc0 = 3, .opc1 = 0, .crn = 4, .crm = 0, .opc2 = 1,
.access = PL1_RW,
.fieldoffset = offsetof(CPUARMState, elr_el[1]) },
{ .name = "SPSR_EL1", .state = ARM_CP_STATE_AA64,
.type = ARM_CP_ALIAS,
.opc0 = 3, .opc1 = 0, .crn = 4, .crm = 0, .opc2 = 0,
.access = PL1_RW,
.fieldoffset = offsetof(CPUARMState, banked_spsr[BANK_SVC]) },
/* We rely on the access checks not allowing the guest to write to the
* state field when SPSel indicates that it's being used as the stack
* pointer.
*/
{ .name = "SP_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 4, .crm = 1, .opc2 = 0,
.access = PL1_RW, .accessfn = sp_el0_access,
.type = ARM_CP_ALIAS,
.fieldoffset = offsetof(CPUARMState, sp_el[0]) },
{ .name = "SP_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 4, .crm = 1, .opc2 = 0,
.access = PL2_RW, .type = ARM_CP_ALIAS,
.fieldoffset = offsetof(CPUARMState, sp_el[1]) },
{ .name = "SPSel", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 4, .crm = 2, .opc2 = 0,
.type = ARM_CP_NO_RAW,
.access = PL1_RW, .readfn = spsel_read, .writefn = spsel_write },
{ .name = "FPEXC32_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 5, .crm = 3, .opc2 = 0,
.type = ARM_CP_ALIAS,
.fieldoffset = offsetof(CPUARMState, vfp.xregs[ARM_VFP_FPEXC]),
.access = PL2_RW, .accessfn = fpexc32_access },
{ .name = "DACR32_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 3, .crm = 0, .opc2 = 0,
.access = PL2_RW, .resetvalue = 0,
.writefn = dacr_write, .raw_writefn = raw_write,
.fieldoffset = offsetof(CPUARMState, cp15.dacr32_el2) },
{ .name = "IFSR32_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 5, .crm = 0, .opc2 = 1,
.access = PL2_RW, .resetvalue = 0,
.fieldoffset = offsetof(CPUARMState, cp15.ifsr32_el2) },
{ .name = "SPSR_IRQ", .state = ARM_CP_STATE_AA64,
.type = ARM_CP_ALIAS,
.opc0 = 3, .opc1 = 4, .crn = 4, .crm = 3, .opc2 = 0,
.access = PL2_RW,
.fieldoffset = offsetof(CPUARMState, banked_spsr[BANK_IRQ]) },
{ .name = "SPSR_ABT", .state = ARM_CP_STATE_AA64,
.type = ARM_CP_ALIAS,
.opc0 = 3, .opc1 = 4, .crn = 4, .crm = 3, .opc2 = 1,
.access = PL2_RW,
.fieldoffset = offsetof(CPUARMState, banked_spsr[BANK_ABT]) },
{ .name = "SPSR_UND", .state = ARM_CP_STATE_AA64,
.type = ARM_CP_ALIAS,
.opc0 = 3, .opc1 = 4, .crn = 4, .crm = 3, .opc2 = 2,
.access = PL2_RW,
.fieldoffset = offsetof(CPUARMState, banked_spsr[BANK_UND]) },
{ .name = "SPSR_FIQ", .state = ARM_CP_STATE_AA64,
.type = ARM_CP_ALIAS,
.opc0 = 3, .opc1 = 4, .crn = 4, .crm = 3, .opc2 = 3,
.access = PL2_RW,
.fieldoffset = offsetof(CPUARMState, banked_spsr[BANK_FIQ]) },
{ .name = "MDCR_EL3", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 6, .crn = 1, .crm = 3, .opc2 = 1,
.resetvalue = 0,
.access = PL3_RW, .fieldoffset = offsetof(CPUARMState, cp15.mdcr_el3) },
{ .name = "SDCR", .type = ARM_CP_ALIAS,
.cp = 15, .opc1 = 0, .crn = 1, .crm = 3, .opc2 = 1,
.access = PL1_RW, .accessfn = access_trap_aa32s_el1,
.writefn = sdcr_write,
.fieldoffset = offsetoflow32(CPUARMState, cp15.mdcr_el3) },
REGINFO_SENTINEL
};
/* Used to describe the behaviour of EL2 regs when EL2 does not exist. */
static const ARMCPRegInfo el3_no_el2_cp_reginfo[] = {
{ .name = "VBAR_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 12, .crm = 0, .opc2 = 0,
.access = PL2_RW,
.readfn = arm_cp_read_zero, .writefn = arm_cp_write_ignore },
{ .name = "HCR_EL2", .state = ARM_CP_STATE_AA64,
.type = ARM_CP_NO_RAW,
.opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 0,
.access = PL2_RW,
.readfn = arm_cp_read_zero, .writefn = arm_cp_write_ignore },
{ .name = "CPTR_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 2,
.access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "MAIR_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 10, .crm = 2, .opc2 = 0,
.access = PL2_RW, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "HMAIR1", .state = ARM_CP_STATE_AA32,
.opc1 = 4, .crn = 10, .crm = 2, .opc2 = 1,
.access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "AMAIR_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 10, .crm = 3, .opc2 = 0,
.access = PL2_RW, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "HMAIR1", .state = ARM_CP_STATE_AA32,
.opc1 = 4, .crn = 10, .crm = 3, .opc2 = 1,
.access = PL2_RW, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "AFSR0_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 5, .crm = 1, .opc2 = 0,
.access = PL2_RW, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "AFSR1_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 5, .crm = 1, .opc2 = 1,
.access = PL2_RW, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "TCR_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 2, .crm = 0, .opc2 = 2,
.access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "VTCR_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 2, .crm = 1, .opc2 = 2,
.access = PL2_RW, .accessfn = access_el3_aa32ns_aa64any,
.type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "VTTBR", .state = ARM_CP_STATE_AA32,
.cp = 15, .opc1 = 6, .crm = 2,
.access = PL2_RW, .accessfn = access_el3_aa32ns,
.type = ARM_CP_CONST | ARM_CP_64BIT, .resetvalue = 0 },
{ .name = "VTTBR_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 2, .crm = 1, .opc2 = 0,
.access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "SCTLR_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 1, .crm = 0, .opc2 = 0,
.access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "TPIDR_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 13, .crm = 0, .opc2 = 2,
.access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "TTBR0_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 2, .crm = 0, .opc2 = 0,
.access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "HTTBR", .cp = 15, .opc1 = 4, .crm = 2,
.access = PL2_RW, .type = ARM_CP_64BIT | ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "CNTHCTL_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 14, .crm = 1, .opc2 = 0,
.access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "CNTVOFF_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 14, .crm = 0, .opc2 = 3,
.access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "CNTVOFF", .cp = 15, .opc1 = 4, .crm = 14,
.access = PL2_RW, .type = ARM_CP_64BIT | ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "CNTHP_CVAL_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 14, .crm = 2, .opc2 = 2,
.access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "CNTHP_CVAL", .cp = 15, .opc1 = 6, .crm = 14,
.access = PL2_RW, .type = ARM_CP_64BIT | ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "CNTHP_TVAL_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 14, .crm = 2, .opc2 = 0,
.access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "CNTHP_CTL_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 14, .crm = 2, .opc2 = 1,
.access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "MDCR_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 1,
.access = PL2_RW, .accessfn = access_tda,
.type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "HPFAR_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 6, .crm = 0, .opc2 = 4,
.access = PL2_RW, .accessfn = access_el3_aa32ns_aa64any,
.type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "HSTR_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 3,
.access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
REGINFO_SENTINEL
};
static void hcr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
{
ARMCPU *cpu = arm_env_get_cpu(env);
uint64_t valid_mask = HCR_MASK;
if (arm_feature(env, ARM_FEATURE_EL3)) {
valid_mask &= ~HCR_HCD;
} else if (cpu->psci_conduit != QEMU_PSCI_CONDUIT_SMC) {
/* Architecturally HCR.TSC is RES0 if EL3 is not implemented.
* However, if we're using the SMC PSCI conduit then QEMU is
* effectively acting like EL3 firmware and so the guest at
* EL2 should retain the ability to prevent EL1 from being
* able to make SMC calls into the ersatz firmware, so in
* that case HCR.TSC should be read/write.
*/
valid_mask &= ~HCR_TSC;
}
/* Clear RES0 bits. */
value &= valid_mask;
/* These bits change the MMU setup:
* HCR_VM enables stage 2 translation
* HCR_PTW forbids certain page-table setups
* HCR_DC Disables stage1 and enables stage2 translation
*/
if ((raw_read(env, ri) ^ value) & (HCR_VM | HCR_PTW | HCR_DC)) {
tlb_flush(CPU(cpu));
}
raw_write(env, ri, value);
}
static const ARMCPRegInfo el2_cp_reginfo[] = {
{ .name = "HCR_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 0,
.access = PL2_RW, .fieldoffset = offsetof(CPUARMState, cp15.hcr_el2),
.writefn = hcr_write },
{ .name = "ELR_EL2", .state = ARM_CP_STATE_AA64,
.type = ARM_CP_ALIAS,
.opc0 = 3, .opc1 = 4, .crn = 4, .crm = 0, .opc2 = 1,
.access = PL2_RW,
.fieldoffset = offsetof(CPUARMState, elr_el[2]) },
{ .name = "ESR_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 5, .crm = 2, .opc2 = 0,
.access = PL2_RW, .fieldoffset = offsetof(CPUARMState, cp15.esr_el[2]) },
{ .name = "FAR_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 6, .crm = 0, .opc2 = 0,
.access = PL2_RW, .fieldoffset = offsetof(CPUARMState, cp15.far_el[2]) },
{ .name = "SPSR_EL2", .state = ARM_CP_STATE_AA64,
.type = ARM_CP_ALIAS,
.opc0 = 3, .opc1 = 4, .crn = 4, .crm = 0, .opc2 = 0,
.access = PL2_RW,
.fieldoffset = offsetof(CPUARMState, banked_spsr[BANK_HYP]) },
{ .name = "VBAR_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 12, .crm = 0, .opc2 = 0,
.access = PL2_RW, .writefn = vbar_write,
.fieldoffset = offsetof(CPUARMState, cp15.vbar_el[2]),
.resetvalue = 0 },
{ .name = "SP_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 6, .crn = 4, .crm = 1, .opc2 = 0,
.access = PL3_RW, .type = ARM_CP_ALIAS,
.fieldoffset = offsetof(CPUARMState, sp_el[2]) },
{ .name = "CPTR_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 2,
.access = PL2_RW, .accessfn = cptr_access, .resetvalue = 0,
.fieldoffset = offsetof(CPUARMState, cp15.cptr_el[2]) },
{ .name = "MAIR_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 10, .crm = 2, .opc2 = 0,
.access = PL2_RW, .fieldoffset = offsetof(CPUARMState, cp15.mair_el[2]),
.resetvalue = 0 },
{ .name = "HMAIR1", .state = ARM_CP_STATE_AA32,
.opc1 = 4, .crn = 10, .crm = 2, .opc2 = 1,
.access = PL2_RW, .type = ARM_CP_ALIAS,
.fieldoffset = offsetofhigh32(CPUARMState, cp15.mair_el[2]) },
{ .name = "AMAIR_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 10, .crm = 3, .opc2 = 0,
.access = PL2_RW, .type = ARM_CP_CONST,
.resetvalue = 0 },
/* HAMAIR1 is mapped to AMAIR_EL2[63:32] */
{ .name = "HMAIR1", .state = ARM_CP_STATE_AA32,
.opc1 = 4, .crn = 10, .crm = 3, .opc2 = 1,
.access = PL2_RW, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "AFSR0_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 5, .crm = 1, .opc2 = 0,
.access = PL2_RW, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "AFSR1_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 5, .crm = 1, .opc2 = 1,
.access = PL2_RW, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "TCR_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 2, .crm = 0, .opc2 = 2,
.access = PL2_RW,
/* no .writefn needed as this can't cause an ASID change;
* no .raw_writefn or .resetfn needed as we never use mask/base_mask
*/
.fieldoffset = offsetof(CPUARMState, cp15.tcr_el[2]) },
{ .name = "VTCR", .state = ARM_CP_STATE_AA32,
.cp = 15, .opc1 = 4, .crn = 2, .crm = 1, .opc2 = 2,
.type = ARM_CP_ALIAS,
.access = PL2_RW, .accessfn = access_el3_aa32ns,
.fieldoffset = offsetof(CPUARMState, cp15.vtcr_el2) },
{ .name = "VTCR_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 2, .crm = 1, .opc2 = 2,
.access = PL2_RW,
/* no .writefn needed as this can't cause an ASID change;
* no .raw_writefn or .resetfn needed as we never use mask/base_mask
*/
.fieldoffset = offsetof(CPUARMState, cp15.vtcr_el2) },
{ .name = "VTTBR", .state = ARM_CP_STATE_AA32,
.cp = 15, .opc1 = 6, .crm = 2,
.type = ARM_CP_64BIT | ARM_CP_ALIAS,
.access = PL2_RW, .accessfn = access_el3_aa32ns,
.fieldoffset = offsetof(CPUARMState, cp15.vttbr_el2),
.writefn = vttbr_write },
{ .name = "VTTBR_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 2, .crm = 1, .opc2 = 0,
.access = PL2_RW, .writefn = vttbr_write,
.fieldoffset = offsetof(CPUARMState, cp15.vttbr_el2) },
{ .name = "SCTLR_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 1, .crm = 0, .opc2 = 0,
.access = PL2_RW, .raw_writefn = raw_write, .writefn = sctlr_write,
.fieldoffset = offsetof(CPUARMState, cp15.sctlr_el[2]) },
{ .name = "TPIDR_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 13, .crm = 0, .opc2 = 2,
.access = PL2_RW, .resetvalue = 0,
.fieldoffset = offsetof(CPUARMState, cp15.tpidr_el[2]) },
{ .name = "TTBR0_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 2, .crm = 0, .opc2 = 0,
.access = PL2_RW, .resetvalue = 0,
.fieldoffset = offsetof(CPUARMState, cp15.ttbr0_el[2]) },
{ .name = "HTTBR", .cp = 15, .opc1 = 4, .crm = 2,
.access = PL2_RW, .type = ARM_CP_64BIT | ARM_CP_ALIAS,
.fieldoffset = offsetof(CPUARMState, cp15.ttbr0_el[2]) },
{ .name = "TLBIALLNSNH",
.cp = 15, .opc1 = 4, .crn = 8, .crm = 7, .opc2 = 4,
.type = ARM_CP_NO_RAW, .access = PL2_W,
.writefn = tlbiall_nsnh_write },
{ .name = "TLBIALLNSNHIS",
.cp = 15, .opc1 = 4, .crn = 8, .crm = 3, .opc2 = 4,
.type = ARM_CP_NO_RAW, .access = PL2_W,
.writefn = tlbiall_nsnh_is_write },
{ .name = "TLBIALLH", .cp = 15, .opc1 = 4, .crn = 8, .crm = 7, .opc2 = 0,
.type = ARM_CP_NO_RAW, .access = PL2_W,
.writefn = tlbiall_hyp_write },
{ .name = "TLBIALLHIS", .cp = 15, .opc1 = 4, .crn = 8, .crm = 3, .opc2 = 0,
.type = ARM_CP_NO_RAW, .access = PL2_W,
.writefn = tlbiall_hyp_is_write },
{ .name = "TLBIMVAH", .cp = 15, .opc1 = 4, .crn = 8, .crm = 7, .opc2 = 1,
.type = ARM_CP_NO_RAW, .access = PL2_W,
.writefn = tlbimva_hyp_write },
{ .name = "TLBIMVAHIS", .cp = 15, .opc1 = 4, .crn = 8, .crm = 3, .opc2 = 1,
.type = ARM_CP_NO_RAW, .access = PL2_W,
.writefn = tlbimva_hyp_is_write },
{ .name = "TLBI_ALLE2", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 7, .opc2 = 0,
.type = ARM_CP_NO_RAW, .access = PL2_W,
.writefn = tlbi_aa64_alle2_write },
{ .name = "TLBI_VAE2", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 7, .opc2 = 1,
.type = ARM_CP_NO_RAW, .access = PL2_W,
.writefn = tlbi_aa64_vae2_write },
{ .name = "TLBI_VALE2", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 7, .opc2 = 5,
.access = PL2_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_vae2_write },
{ .name = "TLBI_ALLE2IS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 3, .opc2 = 0,
.access = PL2_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_alle2is_write },
{ .name = "TLBI_VAE2IS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 3, .opc2 = 1,
.type = ARM_CP_NO_RAW, .access = PL2_W,
.writefn = tlbi_aa64_vae2is_write },
{ .name = "TLBI_VALE2IS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 3, .opc2 = 5,
.access = PL2_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_vae2is_write },
#ifndef CONFIG_USER_ONLY
/* Unlike the other EL2-related AT operations, these must
* UNDEF from EL3 if EL2 is not implemented, which is why we
* define them here rather than with the rest of the AT ops.
*/
{ .name = "AT_S1E2R", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 7, .crm = 8, .opc2 = 0,
.access = PL2_W, .accessfn = at_s1e2_access,
.type = ARM_CP_NO_RAW, .writefn = ats_write64 },
{ .name = "AT_S1E2W", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 7, .crm = 8, .opc2 = 1,
.access = PL2_W, .accessfn = at_s1e2_access,
.type = ARM_CP_NO_RAW, .writefn = ats_write64 },
/* The AArch32 ATS1H* operations are CONSTRAINED UNPREDICTABLE
* if EL2 is not implemented; we choose to UNDEF. Behaviour at EL3
* with SCR.NS == 0 outside Monitor mode is UNPREDICTABLE; we choose
* to behave as if SCR.NS was 1.
*/
{ .name = "ATS1HR", .cp = 15, .opc1 = 4, .crn = 7, .crm = 8, .opc2 = 0,
.access = PL2_W,
.writefn = ats1h_write, .type = ARM_CP_NO_RAW },
{ .name = "ATS1HW", .cp = 15, .opc1 = 4, .crn = 7, .crm = 8, .opc2 = 1,
.access = PL2_W,
.writefn = ats1h_write, .type = ARM_CP_NO_RAW },
{ .name = "CNTHCTL_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 14, .crm = 1, .opc2 = 0,
/* ARMv7 requires bit 0 and 1 to reset to 1. ARMv8 defines the
* reset values as IMPDEF. We choose to reset to 3 to comply with
* both ARMv7 and ARMv8.
*/
.access = PL2_RW, .resetvalue = 3,
.fieldoffset = offsetof(CPUARMState, cp15.cnthctl_el2) },
{ .name = "CNTVOFF_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 14, .crm = 0, .opc2 = 3,
.access = PL2_RW, .type = ARM_CP_IO, .resetvalue = 0,
.writefn = gt_cntvoff_write,
.fieldoffset = offsetof(CPUARMState, cp15.cntvoff_el2) },
{ .name = "CNTVOFF", .cp = 15, .opc1 = 4, .crm = 14,
.access = PL2_RW, .type = ARM_CP_64BIT | ARM_CP_ALIAS | ARM_CP_IO,
.writefn = gt_cntvoff_write,
.fieldoffset = offsetof(CPUARMState, cp15.cntvoff_el2) },
{ .name = "CNTHP_CVAL_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 14, .crm = 2, .opc2 = 2,
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_HYP].cval),
.type = ARM_CP_IO, .access = PL2_RW,
.writefn = gt_hyp_cval_write, .raw_writefn = raw_write },
{ .name = "CNTHP_CVAL", .cp = 15, .opc1 = 6, .crm = 14,
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_HYP].cval),
.access = PL2_RW, .type = ARM_CP_64BIT | ARM_CP_IO,
.writefn = gt_hyp_cval_write, .raw_writefn = raw_write },
{ .name = "CNTHP_TVAL_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 14, .crm = 2, .opc2 = 0,
.type = ARM_CP_NO_RAW | ARM_CP_IO, .access = PL2_RW,
.resetfn = gt_hyp_timer_reset,
.readfn = gt_hyp_tval_read, .writefn = gt_hyp_tval_write },
{ .name = "CNTHP_CTL_EL2", .state = ARM_CP_STATE_BOTH,
.type = ARM_CP_IO,
.opc0 = 3, .opc1 = 4, .crn = 14, .crm = 2, .opc2 = 1,
.access = PL2_RW,
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_HYP].ctl),
.resetvalue = 0,
.writefn = gt_hyp_ctl_write, .raw_writefn = raw_write },
#endif
/* The only field of MDCR_EL2 that has a defined architectural reset value
* is MDCR_EL2.HPMN which should reset to the value of PMCR_EL0.N; but we
* don't impelment any PMU event counters, so using zero as a reset
* value for MDCR_EL2 is okay
*/
{ .name = "MDCR_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 1,
.access = PL2_RW, .resetvalue = 0,
.fieldoffset = offsetof(CPUARMState, cp15.mdcr_el2), },
{ .name = "HPFAR", .state = ARM_CP_STATE_AA32,
.cp = 15, .opc1 = 4, .crn = 6, .crm = 0, .opc2 = 4,
.access = PL2_RW, .accessfn = access_el3_aa32ns,
.fieldoffset = offsetof(CPUARMState, cp15.hpfar_el2) },
{ .name = "HPFAR_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 6, .crm = 0, .opc2 = 4,
.access = PL2_RW,
.fieldoffset = offsetof(CPUARMState, cp15.hpfar_el2) },
{ .name = "HSTR_EL2", .state = ARM_CP_STATE_BOTH,
.cp = 15, .opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 3,
.access = PL2_RW,
.fieldoffset = offsetof(CPUARMState, cp15.hstr_el2) },
REGINFO_SENTINEL
};
static CPAccessResult nsacr_access(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
/* The NSACR is RW at EL3, and RO for NS EL1 and NS EL2.
* At Secure EL1 it traps to EL3.
*/
if (arm_current_el(env) == 3) {
return CP_ACCESS_OK;
}
if (arm_is_secure_below_el3(env)) {
return CP_ACCESS_TRAP_EL3;
}
/* Accesses from EL1 NS and EL2 NS are UNDEF for write but allow reads. */
if (isread) {
return CP_ACCESS_OK;
}
return CP_ACCESS_TRAP_UNCATEGORIZED;
}
static const ARMCPRegInfo el3_cp_reginfo[] = {
{ .name = "SCR_EL3", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 6, .crn = 1, .crm = 1, .opc2 = 0,
.access = PL3_RW, .fieldoffset = offsetof(CPUARMState, cp15.scr_el3),
.resetvalue = 0, .writefn = scr_write },
{ .name = "SCR", .type = ARM_CP_ALIAS,
.cp = 15, .opc1 = 0, .crn = 1, .crm = 1, .opc2 = 0,
.access = PL1_RW, .accessfn = access_trap_aa32s_el1,
.fieldoffset = offsetoflow32(CPUARMState, cp15.scr_el3),
.writefn = scr_write },
{ .name = "SDER32_EL3", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 6, .crn = 1, .crm = 1, .opc2 = 1,
.access = PL3_RW, .resetvalue = 0,
.fieldoffset = offsetof(CPUARMState, cp15.sder) },
{ .name = "SDER",
.cp = 15, .opc1 = 0, .crn = 1, .crm = 1, .opc2 = 1,
.access = PL3_RW, .resetvalue = 0,
.fieldoffset = offsetoflow32(CPUARMState, cp15.sder) },
{ .name = "MVBAR", .cp = 15, .opc1 = 0, .crn = 12, .crm = 0, .opc2 = 1,
.access = PL1_RW, .accessfn = access_trap_aa32s_el1,
.writefn = vbar_write, .resetvalue = 0,
.fieldoffset = offsetof(CPUARMState, cp15.mvbar) },
{ .name = "TTBR0_EL3", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 6, .crn = 2, .crm = 0, .opc2 = 0,
.access = PL3_RW, .writefn = vmsa_ttbr_write, .resetvalue = 0,
.fieldoffset = offsetof(CPUARMState, cp15.ttbr0_el[3]) },
{ .name = "TCR_EL3", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 6, .crn = 2, .crm = 0, .opc2 = 2,
.access = PL3_RW,
/* no .writefn needed as this can't cause an ASID change;
* we must provide a .raw_writefn and .resetfn because we handle
* reset and migration for the AArch32 TTBCR(S), which might be
* using mask and base_mask.
*/
.resetfn = vmsa_ttbcr_reset, .raw_writefn = vmsa_ttbcr_raw_write,
.fieldoffset = offsetof(CPUARMState, cp15.tcr_el[3]) },
{ .name = "ELR_EL3", .state = ARM_CP_STATE_AA64,
.type = ARM_CP_ALIAS,
.opc0 = 3, .opc1 = 6, .crn = 4, .crm = 0, .opc2 = 1,
.access = PL3_RW,
.fieldoffset = offsetof(CPUARMState, elr_el[3]) },
{ .name = "ESR_EL3", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 6, .crn = 5, .crm = 2, .opc2 = 0,
.access = PL3_RW, .fieldoffset = offsetof(CPUARMState, cp15.esr_el[3]) },
{ .name = "FAR_EL3", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 6, .crn = 6, .crm = 0, .opc2 = 0,
.access = PL3_RW, .fieldoffset = offsetof(CPUARMState, cp15.far_el[3]) },
{ .name = "SPSR_EL3", .state = ARM_CP_STATE_AA64,
.type = ARM_CP_ALIAS,
.opc0 = 3, .opc1 = 6, .crn = 4, .crm = 0, .opc2 = 0,
.access = PL3_RW,
.fieldoffset = offsetof(CPUARMState, banked_spsr[BANK_MON]) },
{ .name = "VBAR_EL3", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 6, .crn = 12, .crm = 0, .opc2 = 0,
.access = PL3_RW, .writefn = vbar_write,
.fieldoffset = offsetof(CPUARMState, cp15.vbar_el[3]),
.resetvalue = 0 },
{ .name = "CPTR_EL3", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 6, .crn = 1, .crm = 1, .opc2 = 2,
.access = PL3_RW, .accessfn = cptr_access, .resetvalue = 0,
.fieldoffset = offsetof(CPUARMState, cp15.cptr_el[3]) },
{ .name = "TPIDR_EL3", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 6, .crn = 13, .crm = 0, .opc2 = 2,
.access = PL3_RW, .resetvalue = 0,
.fieldoffset = offsetof(CPUARMState, cp15.tpidr_el[3]) },
{ .name = "AMAIR_EL3", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 6, .crn = 10, .crm = 3, .opc2 = 0,
.access = PL3_RW, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "AFSR0_EL3", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 6, .crn = 5, .crm = 1, .opc2 = 0,
.access = PL3_RW, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "AFSR1_EL3", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 6, .crn = 5, .crm = 1, .opc2 = 1,
.access = PL3_RW, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "TLBI_ALLE3IS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 6, .crn = 8, .crm = 3, .opc2 = 0,
.access = PL3_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_alle3is_write },
{ .name = "TLBI_VAE3IS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 6, .crn = 8, .crm = 3, .opc2 = 1,
.access = PL3_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_vae3is_write },
{ .name = "TLBI_VALE3IS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 6, .crn = 8, .crm = 3, .opc2 = 5,
.access = PL3_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_vae3is_write },
{ .name = "TLBI_ALLE3", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 6, .crn = 8, .crm = 7, .opc2 = 0,
.access = PL3_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_alle3_write },
{ .name = "TLBI_VAE3", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 6, .crn = 8, .crm = 7, .opc2 = 1,
.access = PL3_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_vae3_write },
{ .name = "TLBI_VALE3", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 6, .crn = 8, .crm = 7, .opc2 = 5,
.access = PL3_W, .type = ARM_CP_NO_RAW,
.writefn = tlbi_aa64_vae3_write },
REGINFO_SENTINEL
};
static CPAccessResult ctr_el0_access(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
/* Only accessible in EL0 if SCTLR.UCT is set (and only in AArch64,
* but the AArch32 CTR has its own reginfo struct)
*/
if (arm_current_el(env) == 0 && !(env->cp15.sctlr_el[1] & SCTLR_UCT)) {
return CP_ACCESS_TRAP;
}
return CP_ACCESS_OK;
}
static void oslar_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* Writes to OSLAR_EL1 may update the OS lock status, which can be
* read via a bit in OSLSR_EL1.
*/
int oslock;
if (ri->state == ARM_CP_STATE_AA32) {
oslock = (value == 0xC5ACCE55);
} else {
oslock = value & 1;
}
env->cp15.oslsr_el1 = deposit32(env->cp15.oslsr_el1, 1, 1, oslock);
}
static const ARMCPRegInfo debug_cp_reginfo[] = {
/* DBGDRAR, DBGDSAR: always RAZ since we don't implement memory mapped
* debug components. The AArch64 version of DBGDRAR is named MDRAR_EL1;
* unlike DBGDRAR it is never accessible from EL0.
* DBGDSAR is deprecated and must RAZ from v8 anyway, so it has no AArch64
* accessor.
*/
{ .name = "DBGDRAR", .cp = 14, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 0,
.access = PL0_R, .accessfn = access_tdra,
.type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "MDRAR_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 2, .opc1 = 0, .crn = 1, .crm = 0, .opc2 = 0,
.access = PL1_R, .accessfn = access_tdra,
.type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "DBGDSAR", .cp = 14, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 0,
.access = PL0_R, .accessfn = access_tdra,
.type = ARM_CP_CONST, .resetvalue = 0 },
/* Monitor debug system control register; the 32-bit alias is DBGDSCRext. */
{ .name = "MDSCR_EL1", .state = ARM_CP_STATE_BOTH,
.cp = 14, .opc0 = 2, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 2,
.access = PL1_RW, .accessfn = access_tda,
.fieldoffset = offsetof(CPUARMState, cp15.mdscr_el1),
.resetvalue = 0 },
/* MDCCSR_EL0, aka DBGDSCRint. This is a read-only mirror of MDSCR_EL1.
* We don't implement the configurable EL0 access.
*/
{ .name = "MDCCSR_EL0", .state = ARM_CP_STATE_BOTH,
.cp = 14, .opc0 = 2, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 0,
.type = ARM_CP_ALIAS,
.access = PL1_R, .accessfn = access_tda,
.fieldoffset = offsetof(CPUARMState, cp15.mdscr_el1), },
{ .name = "OSLAR_EL1", .state = ARM_CP_STATE_BOTH,
.cp = 14, .opc0 = 2, .opc1 = 0, .crn = 1, .crm = 0, .opc2 = 4,
.access = PL1_W, .type = ARM_CP_NO_RAW,
.accessfn = access_tdosa,
.writefn = oslar_write },
{ .name = "OSLSR_EL1", .state = ARM_CP_STATE_BOTH,
.cp = 14, .opc0 = 2, .opc1 = 0, .crn = 1, .crm = 1, .opc2 = 4,
.access = PL1_R, .resetvalue = 10,
.accessfn = access_tdosa,
.fieldoffset = offsetof(CPUARMState, cp15.oslsr_el1) },
/* Dummy OSDLR_EL1: 32-bit Linux will read this */
{ .name = "OSDLR_EL1", .state = ARM_CP_STATE_BOTH,
.cp = 14, .opc0 = 2, .opc1 = 0, .crn = 1, .crm = 3, .opc2 = 4,
.access = PL1_RW, .accessfn = access_tdosa,
.type = ARM_CP_NOP },
/* Dummy DBGVCR: Linux wants to clear this on startup, but we don't
* implement vector catch debug events yet.
*/
{ .name = "DBGVCR",
.cp = 14, .opc1 = 0, .crn = 0, .crm = 7, .opc2 = 0,
.access = PL1_RW, .accessfn = access_tda,
.type = ARM_CP_NOP },
/* Dummy DBGVCR32_EL2 (which is only for a 64-bit hypervisor
* to save and restore a 32-bit guest's DBGVCR)
*/
{ .name = "DBGVCR32_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 2, .opc1 = 4, .crn = 0, .crm = 7, .opc2 = 0,
.access = PL2_RW, .accessfn = access_tda,
.type = ARM_CP_NOP },
/* Dummy MDCCINT_EL1, since we don't implement the Debug Communications
* Channel but Linux may try to access this register. The 32-bit
* alias is DBGDCCINT.
*/
{ .name = "MDCCINT_EL1", .state = ARM_CP_STATE_BOTH,
.cp = 14, .opc0 = 2, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 0,
.access = PL1_RW, .accessfn = access_tda,
.type = ARM_CP_NOP },
REGINFO_SENTINEL
};
static const ARMCPRegInfo debug_lpae_cp_reginfo[] = {
/* 64 bit access versions of the (dummy) debug registers */
{ .name = "DBGDRAR", .cp = 14, .crm = 1, .opc1 = 0,
.access = PL0_R, .type = ARM_CP_CONST|ARM_CP_64BIT, .resetvalue = 0 },
{ .name = "DBGDSAR", .cp = 14, .crm = 2, .opc1 = 0,
.access = PL0_R, .type = ARM_CP_CONST|ARM_CP_64BIT, .resetvalue = 0 },
REGINFO_SENTINEL
};
/* Return the exception level to which SVE-disabled exceptions should
* be taken, or 0 if SVE is enabled.
*/
static int sve_exception_el(CPUARMState *env)
{
#ifndef CONFIG_USER_ONLY
unsigned current_el = arm_current_el(env);
/* The CPACR.ZEN controls traps to EL1:
* 0, 2 : trap EL0 and EL1 accesses
* 1 : trap only EL0 accesses
* 3 : trap no accesses
*/
switch (extract32(env->cp15.cpacr_el1, 16, 2)) {
default:
if (current_el <= 1) {
/* Trap to PL1, which might be EL1 or EL3 */
if (arm_is_secure(env) && !arm_el_is_aa64(env, 3)) {
return 3;
}
return 1;
}
break;
case 1:
if (current_el == 0) {
return 1;
}
break;
case 3:
break;
}
/* Similarly for CPACR.FPEN, after having checked ZEN. */
switch (extract32(env->cp15.cpacr_el1, 20, 2)) {
default:
if (current_el <= 1) {
if (arm_is_secure(env) && !arm_el_is_aa64(env, 3)) {
return 3;
}
return 1;
}
break;
case 1:
if (current_el == 0) {
return 1;
}
break;
case 3:
break;
}
/* CPTR_EL2. Check both TZ and TFP. */
if (current_el <= 2
&& (env->cp15.cptr_el[2] & (CPTR_TFP | CPTR_TZ))
&& !arm_is_secure_below_el3(env)) {
return 2;
}
/* CPTR_EL3. Check both EZ and TFP. */
if (!(env->cp15.cptr_el[3] & CPTR_EZ)
|| (env->cp15.cptr_el[3] & CPTR_TFP)) {
return 3;
}
#endif
return 0;
}
static void zcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* Bits other than [3:0] are RAZ/WI. */
raw_write(env, ri, value & 0xf);
}
static const ARMCPRegInfo zcr_el1_reginfo = {
.name = "ZCR_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 1, .crm = 2, .opc2 = 0,
.access = PL1_RW, .type = ARM_CP_SVE | ARM_CP_FPU,
.fieldoffset = offsetof(CPUARMState, vfp.zcr_el[1]),
.writefn = zcr_write, .raw_writefn = raw_write
};
static const ARMCPRegInfo zcr_el2_reginfo = {
.name = "ZCR_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 1, .crm = 2, .opc2 = 0,
.access = PL2_RW, .type = ARM_CP_SVE | ARM_CP_FPU,
.fieldoffset = offsetof(CPUARMState, vfp.zcr_el[2]),
.writefn = zcr_write, .raw_writefn = raw_write
};
static const ARMCPRegInfo zcr_no_el2_reginfo = {
.name = "ZCR_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 1, .crm = 2, .opc2 = 0,
.access = PL2_RW, .type = ARM_CP_SVE | ARM_CP_FPU,
.readfn = arm_cp_read_zero, .writefn = arm_cp_write_ignore
};
static const ARMCPRegInfo zcr_el3_reginfo = {
.name = "ZCR_EL3", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 6, .crn = 1, .crm = 2, .opc2 = 0,
.access = PL3_RW, .type = ARM_CP_SVE | ARM_CP_FPU,
.fieldoffset = offsetof(CPUARMState, vfp.zcr_el[3]),
.writefn = zcr_write, .raw_writefn = raw_write
};
void hw_watchpoint_update(ARMCPU *cpu, int n)
{
CPUARMState *env = &cpu->env;
vaddr len = 0;
vaddr wvr = env->cp15.dbgwvr[n];
uint64_t wcr = env->cp15.dbgwcr[n];
int mask;
int flags = BP_CPU | BP_STOP_BEFORE_ACCESS;
if (env->cpu_watchpoint[n]) {
cpu_watchpoint_remove_by_ref(CPU(cpu), env->cpu_watchpoint[n]);
env->cpu_watchpoint[n] = NULL;
}
if (!extract64(wcr, 0, 1)) {
/* E bit clear : watchpoint disabled */
return;
}
switch (extract64(wcr, 3, 2)) {
case 0:
/* LSC 00 is reserved and must behave as if the wp is disabled */
return;
case 1:
flags |= BP_MEM_READ;
break;
case 2:
flags |= BP_MEM_WRITE;
break;
case 3:
flags |= BP_MEM_ACCESS;
break;
}
/* Attempts to use both MASK and BAS fields simultaneously are
* CONSTRAINED UNPREDICTABLE; we opt to ignore BAS in this case,
* thus generating a watchpoint for every byte in the masked region.
*/
mask = extract64(wcr, 24, 4);
if (mask == 1 || mask == 2) {
/* Reserved values of MASK; we must act as if the mask value was
* some non-reserved value, or as if the watchpoint were disabled.
* We choose the latter.
*/
return;
} else if (mask) {
/* Watchpoint covers an aligned area up to 2GB in size */
len = 1ULL << mask;
/* If masked bits in WVR are not zero it's CONSTRAINED UNPREDICTABLE
* whether the watchpoint fires when the unmasked bits match; we opt
* to generate the exceptions.
*/
wvr &= ~(len - 1);
} else {
/* Watchpoint covers bytes defined by the byte address select bits */
int bas = extract64(wcr, 5, 8);
int basstart;
if (bas == 0) {
/* This must act as if the watchpoint is disabled */
return;
}
if (extract64(wvr, 2, 1)) {
/* Deprecated case of an only 4-aligned address. BAS[7:4] are
* ignored, and BAS[3:0] define which bytes to watch.
*/
bas &= 0xf;
}
/* The BAS bits are supposed to be programmed to indicate a contiguous
* range of bytes. Otherwise it is CONSTRAINED UNPREDICTABLE whether
* we fire for each byte in the word/doubleword addressed by the WVR.
* We choose to ignore any non-zero bits after the first range of 1s.
*/
basstart = ctz32(bas);
len = cto32(bas >> basstart);
wvr += basstart;
}
cpu_watchpoint_insert(CPU(cpu), wvr, len, flags,
&env->cpu_watchpoint[n]);
}
void hw_watchpoint_update_all(ARMCPU *cpu)
{
int i;
CPUARMState *env = &cpu->env;
/* Completely clear out existing QEMU watchpoints and our array, to
* avoid possible stale entries following migration load.
*/
cpu_watchpoint_remove_all(CPU(cpu), BP_CPU);
memset(env->cpu_watchpoint, 0, sizeof(env->cpu_watchpoint));
for (i = 0; i < ARRAY_SIZE(cpu->env.cpu_watchpoint); i++) {
hw_watchpoint_update(cpu, i);
}
}
static void dbgwvr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
ARMCPU *cpu = arm_env_get_cpu(env);
int i = ri->crm;
/* Bits [63:49] are hardwired to the value of bit [48]; that is, the
* register reads and behaves as if values written are sign extended.
* Bits [1:0] are RES0.
*/
value = sextract64(value, 0, 49) & ~3ULL;
raw_write(env, ri, value);
hw_watchpoint_update(cpu, i);
}
static void dbgwcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
ARMCPU *cpu = arm_env_get_cpu(env);
int i = ri->crm;
raw_write(env, ri, value);
hw_watchpoint_update(cpu, i);
}
void hw_breakpoint_update(ARMCPU *cpu, int n)
{
CPUARMState *env = &cpu->env;
uint64_t bvr = env->cp15.dbgbvr[n];
uint64_t bcr = env->cp15.dbgbcr[n];
vaddr addr;
int bt;
int flags = BP_CPU;
if (env->cpu_breakpoint[n]) {
cpu_breakpoint_remove_by_ref(CPU(cpu), env->cpu_breakpoint[n]);
env->cpu_breakpoint[n] = NULL;
}
if (!extract64(bcr, 0, 1)) {
/* E bit clear : watchpoint disabled */
return;
}
bt = extract64(bcr, 20, 4);
switch (bt) {
case 4: /* unlinked address mismatch (reserved if AArch64) */
case 5: /* linked address mismatch (reserved if AArch64) */
qemu_log_mask(LOG_UNIMP,
"arm: address mismatch breakpoint types not implemented\n");
return;
case 0: /* unlinked address match */
case 1: /* linked address match */
{
/* Bits [63:49] are hardwired to the value of bit [48]; that is,
* we behave as if the register was sign extended. Bits [1:0] are
* RES0. The BAS field is used to allow setting breakpoints on 16
* bit wide instructions; it is CONSTRAINED UNPREDICTABLE whether
* a bp will fire if the addresses covered by the bp and the addresses
* covered by the insn overlap but the insn doesn't start at the
* start of the bp address range. We choose to require the insn and
* the bp to have the same address. The constraints on writing to
* BAS enforced in dbgbcr_write mean we have only four cases:
* 0b0000 => no breakpoint
* 0b0011 => breakpoint on addr
* 0b1100 => breakpoint on addr + 2
* 0b1111 => breakpoint on addr
* See also figure D2-3 in the v8 ARM ARM (DDI0487A.c).
*/
int bas = extract64(bcr, 5, 4);
addr = sextract64(bvr, 0, 49) & ~3ULL;
if (bas == 0) {
return;
}
if (bas == 0xc) {
addr += 2;
}
break;
}
case 2: /* unlinked context ID match */
case 8: /* unlinked VMID match (reserved if no EL2) */
case 10: /* unlinked context ID and VMID match (reserved if no EL2) */
qemu_log_mask(LOG_UNIMP,
"arm: unlinked context breakpoint types not implemented\n");
return;
case 9: /* linked VMID match (reserved if no EL2) */
case 11: /* linked context ID and VMID match (reserved if no EL2) */
case 3: /* linked context ID match */
default:
/* We must generate no events for Linked context matches (unless
* they are linked to by some other bp/wp, which is handled in
* updates for the linking bp/wp). We choose to also generate no events
* for reserved values.
*/
return;
}
cpu_breakpoint_insert(CPU(cpu), addr, flags, &env->cpu_breakpoint[n]);
}
void hw_breakpoint_update_all(ARMCPU *cpu)
{
int i;
CPUARMState *env = &cpu->env;
/* Completely clear out existing QEMU breakpoints and our array, to
* avoid possible stale entries following migration load.
*/
cpu_breakpoint_remove_all(CPU(cpu), BP_CPU);
memset(env->cpu_breakpoint, 0, sizeof(env->cpu_breakpoint));
for (i = 0; i < ARRAY_SIZE(cpu->env.cpu_breakpoint); i++) {
hw_breakpoint_update(cpu, i);
}
}
static void dbgbvr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
ARMCPU *cpu = arm_env_get_cpu(env);
int i = ri->crm;
raw_write(env, ri, value);
hw_breakpoint_update(cpu, i);
}
static void dbgbcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
ARMCPU *cpu = arm_env_get_cpu(env);
int i = ri->crm;
/* BAS[3] is a read-only copy of BAS[2], and BAS[1] a read-only
* copy of BAS[0].
*/
value = deposit64(value, 6, 1, extract64(value, 5, 1));
value = deposit64(value, 8, 1, extract64(value, 7, 1));
raw_write(env, ri, value);
hw_breakpoint_update(cpu, i);
}
static void define_debug_regs(ARMCPU *cpu)
{
/* Define v7 and v8 architectural debug registers.
* These are just dummy implementations for now.
*/
int i;
int wrps, brps, ctx_cmps;
ARMCPRegInfo dbgdidr = {
.name = "DBGDIDR", .cp = 14, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 0,
.access = PL0_R, .accessfn = access_tda,
.type = ARM_CP_CONST, .resetvalue = cpu->dbgdidr,
};
/* Note that all these register fields hold "number of Xs minus 1". */
brps = extract32(cpu->dbgdidr, 24, 4);
wrps = extract32(cpu->dbgdidr, 28, 4);
ctx_cmps = extract32(cpu->dbgdidr, 20, 4);
assert(ctx_cmps <= brps);
/* The DBGDIDR and ID_AA64DFR0_EL1 define various properties
* of the debug registers such as number of breakpoints;
* check that if they both exist then they agree.
*/
if (arm_feature(&cpu->env, ARM_FEATURE_AARCH64)) {
assert(extract32(cpu->id_aa64dfr0, 12, 4) == brps);
assert(extract32(cpu->id_aa64dfr0, 20, 4) == wrps);
assert(extract32(cpu->id_aa64dfr0, 28, 4) == ctx_cmps);
}
define_one_arm_cp_reg(cpu, &dbgdidr);
define_arm_cp_regs(cpu, debug_cp_reginfo);
if (arm_feature(&cpu->env, ARM_FEATURE_LPAE)) {
define_arm_cp_regs(cpu, debug_lpae_cp_reginfo);
}
for (i = 0; i < brps + 1; i++) {
ARMCPRegInfo dbgregs[] = {
{ .name = "DBGBVR", .state = ARM_CP_STATE_BOTH,
.cp = 14, .opc0 = 2, .opc1 = 0, .crn = 0, .crm = i, .opc2 = 4,
.access = PL1_RW, .accessfn = access_tda,
.fieldoffset = offsetof(CPUARMState, cp15.dbgbvr[i]),
.writefn = dbgbvr_write, .raw_writefn = raw_write
},
{ .name = "DBGBCR", .state = ARM_CP_STATE_BOTH,
.cp = 14, .opc0 = 2, .opc1 = 0, .crn = 0, .crm = i, .opc2 = 5,
.access = PL1_RW, .accessfn = access_tda,
.fieldoffset = offsetof(CPUARMState, cp15.dbgbcr[i]),
.writefn = dbgbcr_write, .raw_writefn = raw_write
},
REGINFO_SENTINEL
};
define_arm_cp_regs(cpu, dbgregs);
}
for (i = 0; i < wrps + 1; i++) {
ARMCPRegInfo dbgregs[] = {
{ .name = "DBGWVR", .state = ARM_CP_STATE_BOTH,
.cp = 14, .opc0 = 2, .opc1 = 0, .crn = 0, .crm = i, .opc2 = 6,
.access = PL1_RW, .accessfn = access_tda,
.fieldoffset = offsetof(CPUARMState, cp15.dbgwvr[i]),
.writefn = dbgwvr_write, .raw_writefn = raw_write
},
{ .name = "DBGWCR", .state = ARM_CP_STATE_BOTH,
.cp = 14, .opc0 = 2, .opc1 = 0, .crn = 0, .crm = i, .opc2 = 7,
.access = PL1_RW, .accessfn = access_tda,
.fieldoffset = offsetof(CPUARMState, cp15.dbgwcr[i]),
.writefn = dbgwcr_write, .raw_writefn = raw_write
},
REGINFO_SENTINEL
};
define_arm_cp_regs(cpu, dbgregs);
}
}
/* We don't know until after realize whether there's a GICv3
* attached, and that is what registers the gicv3 sysregs.
* So we have to fill in the GIC fields in ID_PFR/ID_PFR1_EL1/ID_AA64PFR0_EL1
* at runtime.
*/
static uint64_t id_pfr1_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
ARMCPU *cpu = arm_env_get_cpu(env);
uint64_t pfr1 = cpu->id_pfr1;
if (env->gicv3state) {
pfr1 |= 1 << 28;
}
return pfr1;
}
static uint64_t id_aa64pfr0_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
ARMCPU *cpu = arm_env_get_cpu(env);
uint64_t pfr0 = cpu->id_aa64pfr0;
if (env->gicv3state) {
pfr0 |= 1 << 24;
}
return pfr0;
}
void register_cp_regs_for_features(ARMCPU *cpu)
{
/* Register all the coprocessor registers based on feature bits */
CPUARMState *env = &cpu->env;
if (arm_feature(env, ARM_FEATURE_M)) {
/* M profile has no coprocessor registers */
return;
}
define_arm_cp_regs(cpu, cp_reginfo);
if (!arm_feature(env, ARM_FEATURE_V8)) {
/* Must go early as it is full of wildcards that may be
* overridden by later definitions.
*/
define_arm_cp_regs(cpu, not_v8_cp_reginfo);
}
if (arm_feature(env, ARM_FEATURE_V6)) {
/* The ID registers all have impdef reset values */
ARMCPRegInfo v6_idregs[] = {
{ .name = "ID_PFR0", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 0,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->id_pfr0 },
/* ID_PFR1 is not a plain ARM_CP_CONST because we don't know
* the value of the GIC field until after we define these regs.
*/
{ .name = "ID_PFR1", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 1,
.access = PL1_R, .type = ARM_CP_NO_RAW,
.readfn = id_pfr1_read,
.writefn = arm_cp_write_ignore },
{ .name = "ID_DFR0", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 2,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->id_dfr0 },
{ .name = "ID_AFR0", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 3,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->id_afr0 },
{ .name = "ID_MMFR0", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 4,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->id_mmfr0 },
{ .name = "ID_MMFR1", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 5,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->id_mmfr1 },
{ .name = "ID_MMFR2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 6,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->id_mmfr2 },
{ .name = "ID_MMFR3", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 7,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->id_mmfr3 },
{ .name = "ID_ISAR0", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 0,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->id_isar0 },
{ .name = "ID_ISAR1", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 1,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->id_isar1 },
{ .name = "ID_ISAR2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 2,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->id_isar2 },
{ .name = "ID_ISAR3", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 3,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->id_isar3 },
{ .name = "ID_ISAR4", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 4,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->id_isar4 },
{ .name = "ID_ISAR5", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 5,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->id_isar5 },
{ .name = "ID_MMFR4", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 6,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->id_mmfr4 },
/* 7 is as yet unallocated and must RAZ */
{ .name = "ID_ISAR7_RESERVED", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 7,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
REGINFO_SENTINEL
};
define_arm_cp_regs(cpu, v6_idregs);
define_arm_cp_regs(cpu, v6_cp_reginfo);
} else {
define_arm_cp_regs(cpu, not_v6_cp_reginfo);
}
if (arm_feature(env, ARM_FEATURE_V6K)) {
define_arm_cp_regs(cpu, v6k_cp_reginfo);
}
if (arm_feature(env, ARM_FEATURE_V7MP) &&
!arm_feature(env, ARM_FEATURE_PMSA)) {
define_arm_cp_regs(cpu, v7mp_cp_reginfo);
}
if (arm_feature(env, ARM_FEATURE_V7)) {
/* v7 performance monitor control register: same implementor
* field as main ID register, and we implement only the cycle
* count register.
*/
#ifndef CONFIG_USER_ONLY
ARMCPRegInfo pmcr = {
.name = "PMCR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 0,
.access = PL0_RW,
.type = ARM_CP_IO | ARM_CP_ALIAS,
.fieldoffset = offsetoflow32(CPUARMState, cp15.c9_pmcr),
.accessfn = pmreg_access, .writefn = pmcr_write,
.raw_writefn = raw_write,
};
ARMCPRegInfo pmcr64 = {
.name = "PMCR_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .crn = 9, .crm = 12, .opc2 = 0,
.access = PL0_RW, .accessfn = pmreg_access,
.type = ARM_CP_IO,
.fieldoffset = offsetof(CPUARMState, cp15.c9_pmcr),
.resetvalue = cpu->midr & 0xff000000,
.writefn = pmcr_write, .raw_writefn = raw_write,
};
define_one_arm_cp_reg(cpu, &pmcr);
define_one_arm_cp_reg(cpu, &pmcr64);
#endif
ARMCPRegInfo clidr = {
.name = "CLIDR", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = 1,
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = cpu->clidr
};
define_one_arm_cp_reg(cpu, &clidr);
define_arm_cp_regs(cpu, v7_cp_reginfo);
define_debug_regs(cpu);
} else {
define_arm_cp_regs(cpu, not_v7_cp_reginfo);
}
if (arm_feature(env, ARM_FEATURE_V8)) {
/* AArch64 ID registers, which all have impdef reset values.
* Note that within the ID register ranges the unused slots
* must all RAZ, not UNDEF; future architecture versions may
* define new registers here.
*/
ARMCPRegInfo v8_idregs[] = {
/* ID_AA64PFR0_EL1 is not a plain ARM_CP_CONST because we don't
* know the right value for the GIC field until after we
* define these regs.
*/
{ .name = "ID_AA64PFR0_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 4, .opc2 = 0,
.access = PL1_R, .type = ARM_CP_NO_RAW,
.readfn = id_aa64pfr0_read,
.writefn = arm_cp_write_ignore },
{ .name = "ID_AA64PFR1_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 4, .opc2 = 1,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->id_aa64pfr1},
{ .name = "ID_AA64PFR2_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 4, .opc2 = 2,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "ID_AA64PFR3_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 4, .opc2 = 3,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "ID_AA64PFR4_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 4, .opc2 = 4,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "ID_AA64PFR5_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 4, .opc2 = 5,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "ID_AA64PFR6_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 4, .opc2 = 6,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "ID_AA64PFR7_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 4, .opc2 = 7,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "ID_AA64DFR0_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 5, .opc2 = 0,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->id_aa64dfr0 },
{ .name = "ID_AA64DFR1_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 5, .opc2 = 1,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->id_aa64dfr1 },
{ .name = "ID_AA64DFR2_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 5, .opc2 = 2,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "ID_AA64DFR3_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 5, .opc2 = 3,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "ID_AA64AFR0_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 5, .opc2 = 4,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->id_aa64afr0 },
{ .name = "ID_AA64AFR1_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 5, .opc2 = 5,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->id_aa64afr1 },
{ .name = "ID_AA64AFR2_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 5, .opc2 = 6,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "ID_AA64AFR3_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 5, .opc2 = 7,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "ID_AA64ISAR0_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 6, .opc2 = 0,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->id_aa64isar0 },
{ .name = "ID_AA64ISAR1_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 6, .opc2 = 1,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->id_aa64isar1 },
{ .name = "ID_AA64ISAR2_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 6, .opc2 = 2,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "ID_AA64ISAR3_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 6, .opc2 = 3,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "ID_AA64ISAR4_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 6, .opc2 = 4,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "ID_AA64ISAR5_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 6, .opc2 = 5,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "ID_AA64ISAR6_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 6, .opc2 = 6,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "ID_AA64ISAR7_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 6, .opc2 = 7,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "ID_AA64MMFR0_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 7, .opc2 = 0,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->id_aa64mmfr0 },
{ .name = "ID_AA64MMFR1_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 7, .opc2 = 1,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->id_aa64mmfr1 },
{ .name = "ID_AA64MMFR2_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 7, .opc2 = 2,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "ID_AA64MMFR3_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 7, .opc2 = 3,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "ID_AA64MMFR4_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 7, .opc2 = 4,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "ID_AA64MMFR5_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 7, .opc2 = 5,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "ID_AA64MMFR6_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 7, .opc2 = 6,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "ID_AA64MMFR7_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 7, .opc2 = 7,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "MVFR0_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 3, .opc2 = 0,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->mvfr0 },
{ .name = "MVFR1_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 3, .opc2 = 1,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->mvfr1 },
{ .name = "MVFR2_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 3, .opc2 = 2,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->mvfr2 },
{ .name = "MVFR3_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 3, .opc2 = 3,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "MVFR4_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 3, .opc2 = 4,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "MVFR5_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 3, .opc2 = 5,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "MVFR6_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 3, .opc2 = 6,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "MVFR7_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 3, .opc2 = 7,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "PMCEID0", .state = ARM_CP_STATE_AA32,
.cp = 15, .opc1 = 0, .crn = 9, .crm = 12, .opc2 = 6,
.access = PL0_R, .accessfn = pmreg_access, .type = ARM_CP_CONST,
.resetvalue = cpu->pmceid0 },
{ .name = "PMCEID0_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .crn = 9, .crm = 12, .opc2 = 6,
.access = PL0_R, .accessfn = pmreg_access, .type = ARM_CP_CONST,
.resetvalue = cpu->pmceid0 },
{ .name = "PMCEID1", .state = ARM_CP_STATE_AA32,
.cp = 15, .opc1 = 0, .crn = 9, .crm = 12, .opc2 = 7,
.access = PL0_R, .accessfn = pmreg_access, .type = ARM_CP_CONST,
.resetvalue = cpu->pmceid1 },
{ .name = "PMCEID1_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .crn = 9, .crm = 12, .opc2 = 7,
.access = PL0_R, .accessfn = pmreg_access, .type = ARM_CP_CONST,
.resetvalue = cpu->pmceid1 },
REGINFO_SENTINEL
};
/* RVBAR_EL1 is only implemented if EL1 is the highest EL */
if (!arm_feature(env, ARM_FEATURE_EL3) &&
!arm_feature(env, ARM_FEATURE_EL2)) {
ARMCPRegInfo rvbar = {
.name = "RVBAR_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 12, .crm = 0, .opc2 = 1,
.type = ARM_CP_CONST, .access = PL1_R, .resetvalue = cpu->rvbar
};
define_one_arm_cp_reg(cpu, &rvbar);
}
define_arm_cp_regs(cpu, v8_idregs);
define_arm_cp_regs(cpu, v8_cp_reginfo);
}
if (arm_feature(env, ARM_FEATURE_EL2)) {
uint64_t vmpidr_def = mpidr_read_val(env);
ARMCPRegInfo vpidr_regs[] = {
{ .name = "VPIDR", .state = ARM_CP_STATE_AA32,
.cp = 15, .opc1 = 4, .crn = 0, .crm = 0, .opc2 = 0,
.access = PL2_RW, .accessfn = access_el3_aa32ns,
.resetvalue = cpu->midr, .type = ARM_CP_ALIAS,
.fieldoffset = offsetoflow32(CPUARMState, cp15.vpidr_el2) },
{ .name = "VPIDR_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 0, .crm = 0, .opc2 = 0,
.access = PL2_RW, .resetvalue = cpu->midr,
.fieldoffset = offsetof(CPUARMState, cp15.vpidr_el2) },
{ .name = "VMPIDR", .state = ARM_CP_STATE_AA32,
.cp = 15, .opc1 = 4, .crn = 0, .crm = 0, .opc2 = 5,
.access = PL2_RW, .accessfn = access_el3_aa32ns,
.resetvalue = vmpidr_def, .type = ARM_CP_ALIAS,
.fieldoffset = offsetoflow32(CPUARMState, cp15.vmpidr_el2) },
{ .name = "VMPIDR_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 0, .crm = 0, .opc2 = 5,
.access = PL2_RW,
.resetvalue = vmpidr_def,
.fieldoffset = offsetof(CPUARMState, cp15.vmpidr_el2) },
REGINFO_SENTINEL
};
define_arm_cp_regs(cpu, vpidr_regs);
define_arm_cp_regs(cpu, el2_cp_reginfo);
/* RVBAR_EL2 is only implemented if EL2 is the highest EL */
if (!arm_feature(env, ARM_FEATURE_EL3)) {
ARMCPRegInfo rvbar = {
.name = "RVBAR_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 12, .crm = 0, .opc2 = 1,
.type = ARM_CP_CONST, .access = PL2_R, .resetvalue = cpu->rvbar
};
define_one_arm_cp_reg(cpu, &rvbar);
}
} else {
/* If EL2 is missing but higher ELs are enabled, we need to
* register the no_el2 reginfos.
*/
if (arm_feature(env, ARM_FEATURE_EL3)) {
/* When EL3 exists but not EL2, VPIDR and VMPIDR take the value
* of MIDR_EL1 and MPIDR_EL1.
*/
ARMCPRegInfo vpidr_regs[] = {
{ .name = "VPIDR_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 0, .crm = 0, .opc2 = 0,
.access = PL2_RW, .accessfn = access_el3_aa32ns_aa64any,
.type = ARM_CP_CONST, .resetvalue = cpu->midr,
.fieldoffset = offsetof(CPUARMState, cp15.vpidr_el2) },
{ .name = "VMPIDR_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 0, .crm = 0, .opc2 = 5,
.access = PL2_RW, .accessfn = access_el3_aa32ns_aa64any,
.type = ARM_CP_NO_RAW,
.writefn = arm_cp_write_ignore, .readfn = mpidr_read },
REGINFO_SENTINEL
};
define_arm_cp_regs(cpu, vpidr_regs);
define_arm_cp_regs(cpu, el3_no_el2_cp_reginfo);
}
}
if (arm_feature(env, ARM_FEATURE_EL3)) {
define_arm_cp_regs(cpu, el3_cp_reginfo);
ARMCPRegInfo el3_regs[] = {
{ .name = "RVBAR_EL3", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 6, .crn = 12, .crm = 0, .opc2 = 1,
.type = ARM_CP_CONST, .access = PL3_R, .resetvalue = cpu->rvbar },
{ .name = "SCTLR_EL3", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 6, .crn = 1, .crm = 0, .opc2 = 0,
.access = PL3_RW,
.raw_writefn = raw_write, .writefn = sctlr_write,
.fieldoffset = offsetof(CPUARMState, cp15.sctlr_el[3]),
.resetvalue = cpu->reset_sctlr },
REGINFO_SENTINEL
};
define_arm_cp_regs(cpu, el3_regs);
}
/* The behaviour of NSACR is sufficiently various that we don't
* try to describe it in a single reginfo:
* if EL3 is 64 bit, then trap to EL3 from S EL1,
* reads as constant 0xc00 from NS EL1 and NS EL2
* if EL3 is 32 bit, then RW at EL3, RO at NS EL1 and NS EL2
* if v7 without EL3, register doesn't exist
* if v8 without EL3, reads as constant 0xc00 from NS EL1 and NS EL2
*/
if (arm_feature(env, ARM_FEATURE_EL3)) {
if (arm_feature(env, ARM_FEATURE_AARCH64)) {
ARMCPRegInfo nsacr = {
.name = "NSACR", .type = ARM_CP_CONST,
.cp = 15, .opc1 = 0, .crn = 1, .crm = 1, .opc2 = 2,
.access = PL1_RW, .accessfn = nsacr_access,
.resetvalue = 0xc00
};
define_one_arm_cp_reg(cpu, &nsacr);
} else {
ARMCPRegInfo nsacr = {
.name = "NSACR",
.cp = 15, .opc1 = 0, .crn = 1, .crm = 1, .opc2 = 2,
.access = PL3_RW | PL1_R,
.resetvalue = 0,
.fieldoffset = offsetof(CPUARMState, cp15.nsacr)
};
define_one_arm_cp_reg(cpu, &nsacr);
}
} else {
if (arm_feature(env, ARM_FEATURE_V8)) {
ARMCPRegInfo nsacr = {
.name = "NSACR", .type = ARM_CP_CONST,
.cp = 15, .opc1 = 0, .crn = 1, .crm = 1, .opc2 = 2,
.access = PL1_R,
.resetvalue = 0xc00
};
define_one_arm_cp_reg(cpu, &nsacr);
}
}
if (arm_feature(env, ARM_FEATURE_PMSA)) {
if (arm_feature(env, ARM_FEATURE_V6)) {
/* PMSAv6 not implemented */
assert(arm_feature(env, ARM_FEATURE_V7));
define_arm_cp_regs(cpu, vmsa_pmsa_cp_reginfo);
define_arm_cp_regs(cpu, pmsav7_cp_reginfo);
} else {
define_arm_cp_regs(cpu, pmsav5_cp_reginfo);
}
} else {
define_arm_cp_regs(cpu, vmsa_pmsa_cp_reginfo);
define_arm_cp_regs(cpu, vmsa_cp_reginfo);
}
if (arm_feature(env, ARM_FEATURE_THUMB2EE)) {
define_arm_cp_regs(cpu, t2ee_cp_reginfo);
}
if (arm_feature(env, ARM_FEATURE_GENERIC_TIMER)) {
define_arm_cp_regs(cpu, generic_timer_cp_reginfo);
}
if (arm_feature(env, ARM_FEATURE_VAPA)) {
define_arm_cp_regs(cpu, vapa_cp_reginfo);
}
if (arm_feature(env, ARM_FEATURE_CACHE_TEST_CLEAN)) {
define_arm_cp_regs(cpu, cache_test_clean_cp_reginfo);
}
if (arm_feature(env, ARM_FEATURE_CACHE_DIRTY_REG)) {
define_arm_cp_regs(cpu, cache_dirty_status_cp_reginfo);
}
if (arm_feature(env, ARM_FEATURE_CACHE_BLOCK_OPS)) {
define_arm_cp_regs(cpu, cache_block_ops_cp_reginfo);
}
if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
define_arm_cp_regs(cpu, omap_cp_reginfo);
}
if (arm_feature(env, ARM_FEATURE_STRONGARM)) {
define_arm_cp_regs(cpu, strongarm_cp_reginfo);
}
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
define_arm_cp_regs(cpu, xscale_cp_reginfo);
}
if (arm_feature(env, ARM_FEATURE_DUMMY_C15_REGS)) {
define_arm_cp_regs(cpu, dummy_c15_cp_reginfo);
}
if (arm_feature(env, ARM_FEATURE_LPAE)) {
define_arm_cp_regs(cpu, lpae_cp_reginfo);
}
/* Slightly awkwardly, the OMAP and StrongARM cores need all of
* cp15 crn=0 to be writes-ignored, whereas for other cores they should
* be read-only (ie write causes UNDEF exception).
*/
{
ARMCPRegInfo id_pre_v8_midr_cp_reginfo[] = {
/* Pre-v8 MIDR space.
* Note that the MIDR isn't a simple constant register because
* of the TI925 behaviour where writes to another register can
* cause the MIDR value to change.
*
* Unimplemented registers in the c15 0 0 0 space default to
* MIDR. Define MIDR first as this entire space, then CTR, TCMTR
* and friends override accordingly.
*/
{ .name = "MIDR",
.cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = CP_ANY,
.access = PL1_R, .resetvalue = cpu->midr,
.writefn = arm_cp_write_ignore, .raw_writefn = raw_write,
.readfn = midr_read,
.fieldoffset = offsetof(CPUARMState, cp15.c0_cpuid),
.type = ARM_CP_OVERRIDE },
/* crn = 0 op1 = 0 crm = 3..7 : currently unassigned; we RAZ. */
{ .name = "DUMMY",
.cp = 15, .crn = 0, .crm = 3, .opc1 = 0, .opc2 = CP_ANY,
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "DUMMY",
.cp = 15, .crn = 0, .crm = 4, .opc1 = 0, .opc2 = CP_ANY,
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "DUMMY",
.cp = 15, .crn = 0, .crm = 5, .opc1 = 0, .opc2 = CP_ANY,
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "DUMMY",
.cp = 15, .crn = 0, .crm = 6, .opc1 = 0, .opc2 = CP_ANY,
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "DUMMY",
.cp = 15, .crn = 0, .crm = 7, .opc1 = 0, .opc2 = CP_ANY,
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
REGINFO_SENTINEL
};
ARMCPRegInfo id_v8_midr_cp_reginfo[] = {
{ .name = "MIDR_EL1", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 0, .opc2 = 0,
.access = PL1_R, .type = ARM_CP_NO_RAW, .resetvalue = cpu->midr,
.fieldoffset = offsetof(CPUARMState, cp15.c0_cpuid),
.readfn = midr_read },
/* crn = 0 op1 = 0 crm = 0 op2 = 4,7 : AArch32 aliases of MIDR */
{ .name = "MIDR", .type = ARM_CP_ALIAS | ARM_CP_CONST,
.cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 4,
.access = PL1_R, .resetvalue = cpu->midr },
{ .name = "MIDR", .type = ARM_CP_ALIAS | ARM_CP_CONST,
.cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 7,
.access = PL1_R, .resetvalue = cpu->midr },
{ .name = "REVIDR_EL1", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 0, .opc2 = 6,
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = cpu->revidr },
REGINFO_SENTINEL
};
ARMCPRegInfo id_cp_reginfo[] = {
/* These are common to v8 and pre-v8 */
{ .name = "CTR",
.cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 1,
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = cpu->ctr },
{ .name = "CTR_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .opc2 = 1, .crn = 0, .crm = 0,
.access = PL0_R, .accessfn = ctr_el0_access,
.type = ARM_CP_CONST, .resetvalue = cpu->ctr },
/* TCMTR and TLBTR exist in v8 but have no 64-bit versions */
{ .name = "TCMTR",
.cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 2,
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
REGINFO_SENTINEL
};
/* TLBTR is specific to VMSA */
ARMCPRegInfo id_tlbtr_reginfo = {
.name = "TLBTR",
.cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 3,
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0,
};
/* MPUIR is specific to PMSA V6+ */
ARMCPRegInfo id_mpuir_reginfo = {
.name = "MPUIR",
.cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 4,
.access = PL1_R, .type = ARM_CP_CONST,
.resetvalue = cpu->pmsav7_dregion << 8
};
ARMCPRegInfo crn0_wi_reginfo = {
.name = "CRN0_WI", .cp = 15, .crn = 0, .crm = CP_ANY,
.opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_W,
.type = ARM_CP_NOP | ARM_CP_OVERRIDE
};
if (arm_feature(env, ARM_FEATURE_OMAPCP) ||
arm_feature(env, ARM_FEATURE_STRONGARM)) {
ARMCPRegInfo *r;
/* Register the blanket "writes ignored" value first to cover the
* whole space. Then update the specific ID registers to allow write
* access, so that they ignore writes rather than causing them to
* UNDEF.
*/
define_one_arm_cp_reg(cpu, &crn0_wi_reginfo);
for (r = id_pre_v8_midr_cp_reginfo;
r->type != ARM_CP_SENTINEL; r++) {
r->access = PL1_RW;
}
for (r = id_cp_reginfo; r->type != ARM_CP_SENTINEL; r++) {
r->access = PL1_RW;
}
id_mpuir_reginfo.access = PL1_RW;
id_tlbtr_reginfo.access = PL1_RW;
}
if (arm_feature(env, ARM_FEATURE_V8)) {
define_arm_cp_regs(cpu, id_v8_midr_cp_reginfo);
} else {
define_arm_cp_regs(cpu, id_pre_v8_midr_cp_reginfo);
}
define_arm_cp_regs(cpu, id_cp_reginfo);
if (!arm_feature(env, ARM_FEATURE_PMSA)) {
define_one_arm_cp_reg(cpu, &id_tlbtr_reginfo);
} else if (arm_feature(env, ARM_FEATURE_V7)) {
define_one_arm_cp_reg(cpu, &id_mpuir_reginfo);
}
}
if (arm_feature(env, ARM_FEATURE_MPIDR)) {
define_arm_cp_regs(cpu, mpidr_cp_reginfo);
}
if (arm_feature(env, ARM_FEATURE_AUXCR)) {
ARMCPRegInfo auxcr_reginfo[] = {
{ .name = "ACTLR_EL1", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 1, .crm = 0, .opc2 = 1,
.access = PL1_RW, .type = ARM_CP_CONST,
.resetvalue = cpu->reset_auxcr },
{ .name = "ACTLR_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 1, .crm = 0, .opc2 = 1,
.access = PL2_RW, .type = ARM_CP_CONST,
.resetvalue = 0 },
{ .name = "ACTLR_EL3", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 6, .crn = 1, .crm = 0, .opc2 = 1,
.access = PL3_RW, .type = ARM_CP_CONST,
.resetvalue = 0 },
REGINFO_SENTINEL
};
define_arm_cp_regs(cpu, auxcr_reginfo);
}
if (arm_feature(env, ARM_FEATURE_CBAR)) {
if (arm_feature(env, ARM_FEATURE_AARCH64)) {
/* 32 bit view is [31:18] 0...0 [43:32]. */
uint32_t cbar32 = (extract64(cpu->reset_cbar, 18, 14) << 18)
| extract64(cpu->reset_cbar, 32, 12);
ARMCPRegInfo cbar_reginfo[] = {
{ .name = "CBAR",
.type = ARM_CP_CONST,
.cp = 15, .crn = 15, .crm = 0, .opc1 = 4, .opc2 = 0,
.access = PL1_R, .resetvalue = cpu->reset_cbar },
{ .name = "CBAR_EL1", .state = ARM_CP_STATE_AA64,
.type = ARM_CP_CONST,
.opc0 = 3, .opc1 = 1, .crn = 15, .crm = 3, .opc2 = 0,
.access = PL1_R, .resetvalue = cbar32 },
REGINFO_SENTINEL
};
/* We don't implement a r/w 64 bit CBAR currently */
assert(arm_feature(env, ARM_FEATURE_CBAR_RO));
define_arm_cp_regs(cpu, cbar_reginfo);
} else {
ARMCPRegInfo cbar = {
.name = "CBAR",
.cp = 15, .crn = 15, .crm = 0, .opc1 = 4, .opc2 = 0,
.access = PL1_R|PL3_W, .resetvalue = cpu->reset_cbar,
.fieldoffset = offsetof(CPUARMState,
cp15.c15_config_base_address)
};
if (arm_feature(env, ARM_FEATURE_CBAR_RO)) {
cbar.access = PL1_R;
cbar.fieldoffset = 0;
cbar.type = ARM_CP_CONST;
}
define_one_arm_cp_reg(cpu, &cbar);
}
}
if (arm_feature(env, ARM_FEATURE_VBAR)) {
ARMCPRegInfo vbar_cp_reginfo[] = {
{ .name = "VBAR", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .crn = 12, .crm = 0, .opc1 = 0, .opc2 = 0,
.access = PL1_RW, .writefn = vbar_write,
.bank_fieldoffsets = { offsetof(CPUARMState, cp15.vbar_s),
offsetof(CPUARMState, cp15.vbar_ns) },
.resetvalue = 0 },
REGINFO_SENTINEL
};
define_arm_cp_regs(cpu, vbar_cp_reginfo);
}
/* Generic registers whose values depend on the implementation */
{
ARMCPRegInfo sctlr = {
.name = "SCTLR", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 1, .crm = 0, .opc2 = 0,
.access = PL1_RW,
.bank_fieldoffsets = { offsetof(CPUARMState, cp15.sctlr_s),
offsetof(CPUARMState, cp15.sctlr_ns) },
.writefn = sctlr_write, .resetvalue = cpu->reset_sctlr,
.raw_writefn = raw_write,
};
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
/* Normally we would always end the TB on an SCTLR write, but Linux
* arch/arm/mach-pxa/sleep.S expects two instructions following
* an MMU enable to execute from cache. Imitate this behaviour.
*/
sctlr.type |= ARM_CP_SUPPRESS_TB_END;
}
define_one_arm_cp_reg(cpu, &sctlr);
}
if (arm_feature(env, ARM_FEATURE_SVE)) {
define_one_arm_cp_reg(cpu, &zcr_el1_reginfo);
if (arm_feature(env, ARM_FEATURE_EL2)) {
define_one_arm_cp_reg(cpu, &zcr_el2_reginfo);
} else {
define_one_arm_cp_reg(cpu, &zcr_no_el2_reginfo);
}
if (arm_feature(env, ARM_FEATURE_EL3)) {
define_one_arm_cp_reg(cpu, &zcr_el3_reginfo);
}
}
}
void arm_cpu_register_gdb_regs_for_features(ARMCPU *cpu)
{
CPUState *cs = CPU(cpu);
CPUARMState *env = &cpu->env;
if (arm_feature(env, ARM_FEATURE_AARCH64)) {
gdb_register_coprocessor(cs, aarch64_fpu_gdb_get_reg,
aarch64_fpu_gdb_set_reg,
34, "aarch64-fpu.xml", 0);
} else if (arm_feature(env, ARM_FEATURE_NEON)) {
gdb_register_coprocessor(cs, vfp_gdb_get_reg, vfp_gdb_set_reg,
51, "arm-neon.xml", 0);
} else if (arm_feature(env, ARM_FEATURE_VFP3)) {
gdb_register_coprocessor(cs, vfp_gdb_get_reg, vfp_gdb_set_reg,
35, "arm-vfp3.xml", 0);
} else if (arm_feature(env, ARM_FEATURE_VFP)) {
gdb_register_coprocessor(cs, vfp_gdb_get_reg, vfp_gdb_set_reg,
19, "arm-vfp.xml", 0);
}
gdb_register_coprocessor(cs, arm_gdb_get_sysreg, arm_gdb_set_sysreg,
arm_gen_dynamic_xml(cs),
"system-registers.xml", 0);
}
/* Sort alphabetically by type name, except for "any". */
static gint arm_cpu_list_compare(gconstpointer a, gconstpointer b)
{
ObjectClass *class_a = (ObjectClass *)a;
ObjectClass *class_b = (ObjectClass *)b;
const char *name_a, *name_b;
name_a = object_class_get_name(class_a);
name_b = object_class_get_name(class_b);
if (strcmp(name_a, "any-" TYPE_ARM_CPU) == 0) {
return 1;
} else if (strcmp(name_b, "any-" TYPE_ARM_CPU) == 0) {
return -1;
} else {
return strcmp(name_a, name_b);
}
}
static void arm_cpu_list_entry(gpointer data, gpointer user_data)
{
ObjectClass *oc = data;
CPUListState *s = user_data;
const char *typename;
char *name;
typename = object_class_get_name(oc);
name = g_strndup(typename, strlen(typename) - strlen("-" TYPE_ARM_CPU));
(*s->cpu_fprintf)(s->file, " %s\n",
name);
g_free(name);
}
void arm_cpu_list(FILE *f, fprintf_function cpu_fprintf)
{
CPUListState s = {
.file = f,
.cpu_fprintf = cpu_fprintf,
};
GSList *list;
list = object_class_get_list(TYPE_ARM_CPU, false);
list = g_slist_sort(list, arm_cpu_list_compare);
(*cpu_fprintf)(f, "Available CPUs:\n");
g_slist_foreach(list, arm_cpu_list_entry, &s);
g_slist_free(list);
#ifdef CONFIG_KVM
/* The 'host' CPU type is dynamically registered only if KVM is
* enabled, so we have to special-case it here:
*/
(*cpu_fprintf)(f, " host (only available in KVM mode)\n");
#endif
}
static void arm_cpu_add_definition(gpointer data, gpointer user_data)
{
ObjectClass *oc = data;
CpuDefinitionInfoList **cpu_list = user_data;
CpuDefinitionInfoList *entry;
CpuDefinitionInfo *info;
const char *typename;
typename = object_class_get_name(oc);
info = g_malloc0(sizeof(*info));
info->name = g_strndup(typename,
strlen(typename) - strlen("-" TYPE_ARM_CPU));
info->q_typename = g_strdup(typename);
entry = g_malloc0(sizeof(*entry));
entry->value = info;
entry->next = *cpu_list;
*cpu_list = entry;
}
CpuDefinitionInfoList *arch_query_cpu_definitions(Error **errp)
{
CpuDefinitionInfoList *cpu_list = NULL;
GSList *list;
list = object_class_get_list(TYPE_ARM_CPU, false);
g_slist_foreach(list, arm_cpu_add_definition, &cpu_list);
g_slist_free(list);
return cpu_list;
}
static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
void *opaque, int state, int secstate,
int crm, int opc1, int opc2,
const char *name)
{
/* Private utility function for define_one_arm_cp_reg_with_opaque():
* add a single reginfo struct to the hash table.
*/
uint32_t *key = g_new(uint32_t, 1);
ARMCPRegInfo *r2 = g_memdup(r, sizeof(ARMCPRegInfo));
int is64 = (r->type & ARM_CP_64BIT) ? 1 : 0;
int ns = (secstate & ARM_CP_SECSTATE_NS) ? 1 : 0;
r2->name = g_strdup(name);
/* Reset the secure state to the specific incoming state. This is
* necessary as the register may have been defined with both states.
*/
r2->secure = secstate;
if (r->bank_fieldoffsets[0] && r->bank_fieldoffsets[1]) {
/* Register is banked (using both entries in array).
* Overwriting fieldoffset as the array is only used to define
* banked registers but later only fieldoffset is used.
*/
r2->fieldoffset = r->bank_fieldoffsets[ns];
}
if (state == ARM_CP_STATE_AA32) {
if (r->bank_fieldoffsets[0] && r->bank_fieldoffsets[1]) {
/* If the register is banked then we don't need to migrate or
* reset the 32-bit instance in certain cases:
*
* 1) If the register has both 32-bit and 64-bit instances then we
* can count on the 64-bit instance taking care of the
* non-secure bank.
* 2) If ARMv8 is enabled then we can count on a 64-bit version
* taking care of the secure bank. This requires that separate
* 32 and 64-bit definitions are provided.
*/
if ((r->state == ARM_CP_STATE_BOTH && ns) ||
(arm_feature(&cpu->env, ARM_FEATURE_V8) && !ns)) {
r2->type |= ARM_CP_ALIAS;
}
} else if ((secstate != r->secure) && !ns) {
/* The register is not banked so we only want to allow migration of
* the non-secure instance.
*/
r2->type |= ARM_CP_ALIAS;
}
if (r->state == ARM_CP_STATE_BOTH) {
/* We assume it is a cp15 register if the .cp field is left unset.
*/
if (r2->cp == 0) {
r2->cp = 15;
}
#ifdef HOST_WORDS_BIGENDIAN
if (r2->fieldoffset) {
r2->fieldoffset += sizeof(uint32_t);
}
#endif
}
}
if (state == ARM_CP_STATE_AA64) {
/* To allow abbreviation of ARMCPRegInfo
* definitions, we treat cp == 0 as equivalent to
* the value for "standard guest-visible sysreg".
* STATE_BOTH definitions are also always "standard
* sysreg" in their AArch64 view (the .cp value may
* be non-zero for the benefit of the AArch32 view).
*/
if (r->cp == 0 || r->state == ARM_CP_STATE_BOTH) {
r2->cp = CP_REG_ARM64_SYSREG_CP;
}
*key = ENCODE_AA64_CP_REG(r2->cp, r2->crn, crm,
r2->opc0, opc1, opc2);
} else {
*key = ENCODE_CP_REG(r2->cp, is64, ns, r2->crn, crm, opc1, opc2);
}
if (opaque) {
r2->opaque = opaque;
}
/* reginfo passed to helpers is correct for the actual access,
* and is never ARM_CP_STATE_BOTH:
*/
r2->state = state;
/* Make sure reginfo passed to helpers for wildcarded regs
* has the correct crm/opc1/opc2 for this reg, not CP_ANY:
*/
r2->crm = crm;
r2->opc1 = opc1;
r2->opc2 = opc2;
/* By convention, for wildcarded registers only the first
* entry is used for migration; the others are marked as
* ALIAS so we don't try to transfer the register
* multiple times. Special registers (ie NOP/WFI) are
* never migratable and not even raw-accessible.
*/
if ((r->type & ARM_CP_SPECIAL)) {
r2->type |= ARM_CP_NO_RAW;
}
if (((r->crm == CP_ANY) && crm != 0) ||
((r->opc1 == CP_ANY) && opc1 != 0) ||
((r->opc2 == CP_ANY) && opc2 != 0)) {
r2->type |= ARM_CP_ALIAS | ARM_CP_NO_GDB;
}
/* Check that raw accesses are either forbidden or handled. Note that
* we can't assert this earlier because the setup of fieldoffset for
* banked registers has to be done first.
*/
if (!(r2->type & ARM_CP_NO_RAW)) {
assert(!raw_accessors_invalid(r2));
}
/* Overriding of an existing definition must be explicitly
* requested.
*/
if (!(r->type & ARM_CP_OVERRIDE)) {
ARMCPRegInfo *oldreg;
oldreg = g_hash_table_lookup(cpu->cp_regs, key);
if (oldreg && !(oldreg->type & ARM_CP_OVERRIDE)) {
fprintf(stderr, "Register redefined: cp=%d %d bit "
"crn=%d crm=%d opc1=%d opc2=%d, "
"was %s, now %s\n", r2->cp, 32 + 32 * is64,
r2->crn, r2->crm, r2->opc1, r2->opc2,
oldreg->name, r2->name);
g_assert_not_reached();
}
}
g_hash_table_insert(cpu->cp_regs, key, r2);
}
void define_one_arm_cp_reg_with_opaque(ARMCPU *cpu,
const ARMCPRegInfo *r, void *opaque)
{
/* Define implementations of coprocessor registers.
* We store these in a hashtable because typically
* there are less than 150 registers in a space which
* is 16*16*16*8*8 = 262144 in size.
* Wildcarding is supported for the crm, opc1 and opc2 fields.
* If a register is defined twice then the second definition is
* used, so this can be used to define some generic registers and
* then override them with implementation specific variations.
* At least one of the original and the second definition should
* include ARM_CP_OVERRIDE in its type bits -- this is just a guard
* against accidental use.
*
* The state field defines whether the register is to be
* visible in the AArch32 or AArch64 execution state. If the
* state is set to ARM_CP_STATE_BOTH then we synthesise a
* reginfo structure for the AArch32 view, which sees the lower
* 32 bits of the 64 bit register.
*
* Only registers visible in AArch64 may set r->opc0; opc0 cannot
* be wildcarded. AArch64 registers are always considered to be 64
* bits; the ARM_CP_64BIT* flag applies only to the AArch32 view of
* the register, if any.
*/
int crm, opc1, opc2, state;
int crmmin = (r->crm == CP_ANY) ? 0 : r->crm;
int crmmax = (r->crm == CP_ANY) ? 15 : r->crm;
int opc1min = (r->opc1 == CP_ANY) ? 0 : r->opc1;
int opc1max = (r->opc1 == CP_ANY) ? 7 : r->opc1;
int opc2min = (r->opc2 == CP_ANY) ? 0 : r->opc2;
int opc2max = (r->opc2 == CP_ANY) ? 7 : r->opc2;
/* 64 bit registers have only CRm and Opc1 fields */
assert(!((r->type & ARM_CP_64BIT) && (r->opc2 || r->crn)));
/* op0 only exists in the AArch64 encodings */
assert((r->state != ARM_CP_STATE_AA32) || (r->opc0 == 0));
/* AArch64 regs are all 64 bit so ARM_CP_64BIT is meaningless */
assert((r->state != ARM_CP_STATE_AA64) || !(r->type & ARM_CP_64BIT));
/* The AArch64 pseudocode CheckSystemAccess() specifies that op1
* encodes a minimum access level for the register. We roll this
* runtime check into our general permission check code, so check
* here that the reginfo's specified permissions are strict enough
* to encompass the generic architectural permission check.
*/
if (r->state != ARM_CP_STATE_AA32) {
int mask = 0;
switch (r->opc1) {
case 0: case 1: case 2:
/* min_EL EL1 */
mask = PL1_RW;
break;
case 3:
/* min_EL EL0 */
mask = PL0_RW;
break;
case 4:
/* min_EL EL2 */
mask = PL2_RW;
break;
case 5:
/* unallocated encoding, so not possible */
assert(false);
break;
case 6:
/* min_EL EL3 */
mask = PL3_RW;
break;
case 7:
/* min_EL EL1, secure mode only (we don't check the latter) */
mask = PL1_RW;
break;
default:
/* broken reginfo with out-of-range opc1 */
assert(false);
break;
}
/* assert our permissions are not too lax (stricter is fine) */
assert((r->access & ~mask) == 0);
}
/* Check that the register definition has enough info to handle
* reads and writes if they are permitted.
*/
if (!(r->type & (ARM_CP_SPECIAL|ARM_CP_CONST))) {
if (r->access & PL3_R) {
assert((r->fieldoffset ||
(r->bank_fieldoffsets[0] && r->bank_fieldoffsets[1])) ||
r->readfn);
}
if (r->access & PL3_W) {
assert((r->fieldoffset ||
(r->bank_fieldoffsets[0] && r->bank_fieldoffsets[1])) ||
r->writefn);
}
}
/* Bad type field probably means missing sentinel at end of reg list */
assert(cptype_valid(r->type));
for (crm = crmmin; crm <= crmmax; crm++) {
for (opc1 = opc1min; opc1 <= opc1max; opc1++) {
for (opc2 = opc2min; opc2 <= opc2max; opc2++) {
for (state = ARM_CP_STATE_AA32;
state <= ARM_CP_STATE_AA64; state++) {
if (r->state != state && r->state != ARM_CP_STATE_BOTH) {
continue;
}
if (state == ARM_CP_STATE_AA32) {
/* Under AArch32 CP registers can be common
* (same for secure and non-secure world) or banked.
*/
char *name;
switch (r->secure) {
case ARM_CP_SECSTATE_S:
case ARM_CP_SECSTATE_NS:
add_cpreg_to_hashtable(cpu, r, opaque, state,
r->secure, crm, opc1, opc2,
r->name);
break;
default:
name = g_strdup_printf("%s_S", r->name);
add_cpreg_to_hashtable(cpu, r, opaque, state,
ARM_CP_SECSTATE_S,
crm, opc1, opc2, name);
g_free(name);
add_cpreg_to_hashtable(cpu, r, opaque, state,
ARM_CP_SECSTATE_NS,
crm, opc1, opc2, r->name);
break;
}
} else {
/* AArch64 registers get mapped to non-secure instance
* of AArch32 */
add_cpreg_to_hashtable(cpu, r, opaque, state,
ARM_CP_SECSTATE_NS,
crm, opc1, opc2, r->name);
}
}
}
}
}
}
void define_arm_cp_regs_with_opaque(ARMCPU *cpu,
const ARMCPRegInfo *regs, void *opaque)
{
/* Define a whole list of registers */
const ARMCPRegInfo *r;
for (r = regs; r->type != ARM_CP_SENTINEL; r++) {
define_one_arm_cp_reg_with_opaque(cpu, r, opaque);
}
}
const ARMCPRegInfo *get_arm_cp_reginfo(GHashTable *cpregs, uint32_t encoded_cp)
{
return g_hash_table_lookup(cpregs, &encoded_cp);
}
void arm_cp_write_ignore(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* Helper coprocessor write function for write-ignore registers */
}
uint64_t arm_cp_read_zero(CPUARMState *env, const ARMCPRegInfo *ri)
{
/* Helper coprocessor write function for read-as-zero registers */
return 0;
}
void arm_cp_reset_ignore(CPUARMState *env, const ARMCPRegInfo *opaque)
{
/* Helper coprocessor reset function for do-nothing-on-reset registers */
}
static int bad_mode_switch(CPUARMState *env, int mode, CPSRWriteType write_type)
{
/* Return true if it is not valid for us to switch to
* this CPU mode (ie all the UNPREDICTABLE cases in
* the ARM ARM CPSRWriteByInstr pseudocode).
*/
/* Changes to or from Hyp via MSR and CPS are illegal. */
if (write_type == CPSRWriteByInstr &&
((env->uncached_cpsr & CPSR_M) == ARM_CPU_MODE_HYP ||
mode == ARM_CPU_MODE_HYP)) {
return 1;
}
switch (mode) {
case ARM_CPU_MODE_USR:
return 0;
case ARM_CPU_MODE_SYS:
case ARM_CPU_MODE_SVC:
case ARM_CPU_MODE_ABT:
case ARM_CPU_MODE_UND:
case ARM_CPU_MODE_IRQ:
case ARM_CPU_MODE_FIQ:
/* Note that we don't implement the IMPDEF NSACR.RFR which in v7
* allows FIQ mode to be Secure-only. (In v8 this doesn't exist.)
*/
/* If HCR.TGE is set then changes from Monitor to NS PL1 via MSR
* and CPS are treated as illegal mode changes.
*/
if (write_type == CPSRWriteByInstr &&
(env->cp15.hcr_el2 & HCR_TGE) &&
(env->uncached_cpsr & CPSR_M) == ARM_CPU_MODE_MON &&
!arm_is_secure_below_el3(env)) {
return 1;
}
return 0;
case ARM_CPU_MODE_HYP:
return !arm_feature(env, ARM_FEATURE_EL2)
|| arm_current_el(env) < 2 || arm_is_secure(env);
case ARM_CPU_MODE_MON:
return arm_current_el(env) < 3;
default:
return 1;
}
}
uint32_t cpsr_read(CPUARMState *env)
{
int ZF;
ZF = (env->ZF == 0);
return env->uncached_cpsr | (env->NF & 0x80000000) | (ZF << 30) |
(env->CF << 29) | ((env->VF & 0x80000000) >> 3) | (env->QF << 27)
| (env->thumb << 5) | ((env->condexec_bits & 3) << 25)
| ((env->condexec_bits & 0xfc) << 8)
| (env->GE << 16) | (env->daif & CPSR_AIF);
}
void cpsr_write(CPUARMState *env, uint32_t val, uint32_t mask,
CPSRWriteType write_type)
{
uint32_t changed_daif;
if (mask & CPSR_NZCV) {
env->ZF = (~val) & CPSR_Z;
env->NF = val;
env->CF = (val >> 29) & 1;
env->VF = (val << 3) & 0x80000000;
}
if (mask & CPSR_Q)
env->QF = ((val & CPSR_Q) != 0);
if (mask & CPSR_T)
env->thumb = ((val & CPSR_T) != 0);
if (mask & CPSR_IT_0_1) {
env->condexec_bits &= ~3;
env->condexec_bits |= (val >> 25) & 3;
}
if (mask & CPSR_IT_2_7) {
env->condexec_bits &= 3;
env->condexec_bits |= (val >> 8) & 0xfc;
}
if (mask & CPSR_GE) {
env->GE = (val >> 16) & 0xf;
}
/* In a V7 implementation that includes the security extensions but does
* not include Virtualization Extensions the SCR.FW and SCR.AW bits control
* whether non-secure software is allowed to change the CPSR_F and CPSR_A
* bits respectively.
*
* In a V8 implementation, it is permitted for privileged software to
* change the CPSR A/F bits regardless of the SCR.AW/FW bits.
*/
if (write_type != CPSRWriteRaw && !arm_feature(env, ARM_FEATURE_V8) &&
arm_feature(env, ARM_FEATURE_EL3) &&
!arm_feature(env, ARM_FEATURE_EL2) &&
!arm_is_secure(env)) {
changed_daif = (env->daif ^ val) & mask;
if (changed_daif & CPSR_A) {
/* Check to see if we are allowed to change the masking of async
* abort exceptions from a non-secure state.
*/
if (!(env->cp15.scr_el3 & SCR_AW)) {
qemu_log_mask(LOG_GUEST_ERROR,
"Ignoring attempt to switch CPSR_A flag from "
"non-secure world with SCR.AW bit clear\n");
mask &= ~CPSR_A;
}
}
if (changed_daif & CPSR_F) {
/* Check to see if we are allowed to change the masking of FIQ
* exceptions from a non-secure state.
*/
if (!(env->cp15.scr_el3 & SCR_FW)) {
qemu_log_mask(LOG_GUEST_ERROR,
"Ignoring attempt to switch CPSR_F flag from "
"non-secure world with SCR.FW bit clear\n");
mask &= ~CPSR_F;
}
/* Check whether non-maskable FIQ (NMFI) support is enabled.
* If this bit is set software is not allowed to mask
* FIQs, but is allowed to set CPSR_F to 0.
*/
if ((A32_BANKED_CURRENT_REG_GET(env, sctlr) & SCTLR_NMFI) &&
(val & CPSR_F)) {
qemu_log_mask(LOG_GUEST_ERROR,
"Ignoring attempt to enable CPSR_F flag "
"(non-maskable FIQ [NMFI] support enabled)\n");
mask &= ~CPSR_F;
}
}
}
env->daif &= ~(CPSR_AIF & mask);
env->daif |= val & CPSR_AIF & mask;
if (write_type != CPSRWriteRaw &&
((env->uncached_cpsr ^ val) & mask & CPSR_M)) {
if ((env->uncached_cpsr & CPSR_M) == ARM_CPU_MODE_USR) {
/* Note that we can only get here in USR mode if this is a
* gdb stub write; for this case we follow the architectural
* behaviour for guest writes in USR mode of ignoring an attempt
* to switch mode. (Those are caught by translate.c for writes
* triggered by guest instructions.)
*/
mask &= ~CPSR_M;
} else if (bad_mode_switch(env, val & CPSR_M, write_type)) {
/* Attempt to switch to an invalid mode: this is UNPREDICTABLE in
* v7, and has defined behaviour in v8:
* + leave CPSR.M untouched
* + allow changes to the other CPSR fields
* + set PSTATE.IL
* For user changes via the GDB stub, we don't set PSTATE.IL,
* as this would be unnecessarily harsh for a user error.
*/
mask &= ~CPSR_M;
if (write_type != CPSRWriteByGDBStub &&
arm_feature(env, ARM_FEATURE_V8)) {
mask |= CPSR_IL;
val |= CPSR_IL;
}
} else {
switch_mode(env, val & CPSR_M);
}
}
mask &= ~CACHED_CPSR_BITS;
env->uncached_cpsr = (env->uncached_cpsr & ~mask) | (val & mask);
}
/* Sign/zero extend */
uint32_t HELPER(sxtb16)(uint32_t x)
{
uint32_t res;
res = (uint16_t)(int8_t)x;
res |= (uint32_t)(int8_t)(x >> 16) << 16;
return res;
}
uint32_t HELPER(uxtb16)(uint32_t x)
{
uint32_t res;
res = (uint16_t)(uint8_t)x;
res |= (uint32_t)(uint8_t)(x >> 16) << 16;
return res;
}
int32_t HELPER(sdiv)(int32_t num, int32_t den)
{
if (den == 0)
return 0;
if (num == INT_MIN && den == -1)
return INT_MIN;
return num / den;
}
uint32_t HELPER(udiv)(uint32_t num, uint32_t den)
{
if (den == 0)
return 0;
return num / den;
}
uint32_t HELPER(rbit)(uint32_t x)
{
return revbit32(x);
}
#if defined(CONFIG_USER_ONLY)
/* These should probably raise undefined insn exceptions. */
void HELPER(v7m_msr)(CPUARMState *env, uint32_t reg, uint32_t val)
{
ARMCPU *cpu = arm_env_get_cpu(env);
cpu_abort(CPU(cpu), "v7m_msr %d\n", reg);
}
uint32_t HELPER(v7m_mrs)(CPUARMState *env, uint32_t reg)
{
ARMCPU *cpu = arm_env_get_cpu(env);
cpu_abort(CPU(cpu), "v7m_mrs %d\n", reg);
return 0;
}
void HELPER(v7m_bxns)(CPUARMState *env, uint32_t dest)
{
/* translate.c should never generate calls here in user-only mode */
g_assert_not_reached();
}
void HELPER(v7m_blxns)(CPUARMState *env, uint32_t dest)
{
/* translate.c should never generate calls here in user-only mode */
g_assert_not_reached();
}
uint32_t HELPER(v7m_tt)(CPUARMState *env, uint32_t addr, uint32_t op)
{
/* The TT instructions can be used by unprivileged code, but in
* user-only emulation we don't have the MPU.
* Luckily since we know we are NonSecure unprivileged (and that in
* turn means that the A flag wasn't specified), all the bits in the
* register must be zero:
* IREGION: 0 because IRVALID is 0
* IRVALID: 0 because NS
* S: 0 because NS
* NSRW: 0 because NS
* NSR: 0 because NS
* RW: 0 because unpriv and A flag not set
* R: 0 because unpriv and A flag not set
* SRVALID: 0 because NS
* MRVALID: 0 because unpriv and A flag not set
* SREGION: 0 becaus SRVALID is 0
* MREGION: 0 because MRVALID is 0
*/
return 0;
}
void switch_mode(CPUARMState *env, int mode)
{
ARMCPU *cpu = arm_env_get_cpu(env);
if (mode != ARM_CPU_MODE_USR) {
cpu_abort(CPU(cpu), "Tried to switch out of user mode\n");
}
}
uint32_t arm_phys_excp_target_el(CPUState *cs, uint32_t excp_idx,
uint32_t cur_el, bool secure)
{
return 1;
}
void aarch64_sync_64_to_32(CPUARMState *env)
{
g_assert_not_reached();
}
#else
void switch_mode(CPUARMState *env, int mode)
{
int old_mode;
int i;
old_mode = env->uncached_cpsr & CPSR_M;
if (mode == old_mode)
return;
if (old_mode == ARM_CPU_MODE_FIQ) {
memcpy (env->fiq_regs, env->regs + 8, 5 * sizeof(uint32_t));
memcpy (env->regs + 8, env->usr_regs, 5 * sizeof(uint32_t));
} else if (mode == ARM_CPU_MODE_FIQ) {
memcpy (env->usr_regs, env->regs + 8, 5 * sizeof(uint32_t));
memcpy (env->regs + 8, env->fiq_regs, 5 * sizeof(uint32_t));
}
i = bank_number(old_mode);
env->banked_r13[i] = env->regs[13];
env->banked_r14[i] = env->regs[14];
env->banked_spsr[i] = env->spsr;
i = bank_number(mode);
env->regs[13] = env->banked_r13[i];
env->regs[14] = env->banked_r14[i];
env->spsr = env->banked_spsr[i];
}
/* Physical Interrupt Target EL Lookup Table
*
* [ From ARM ARM section G1.13.4 (Table G1-15) ]
*
* The below multi-dimensional table is used for looking up the target
* exception level given numerous condition criteria. Specifically, the
* target EL is based on SCR and HCR routing controls as well as the
* currently executing EL and secure state.
*
* Dimensions:
* target_el_table[2][2][2][2][2][4]
* | | | | | +--- Current EL
* | | | | +------ Non-secure(0)/Secure(1)
* | | | +--------- HCR mask override
* | | +------------ SCR exec state control
* | +--------------- SCR mask override
* +------------------ 32-bit(0)/64-bit(1) EL3
*
* The table values are as such:
* 0-3 = EL0-EL3
* -1 = Cannot occur
*
* The ARM ARM target EL table includes entries indicating that an "exception
* is not taken". The two cases where this is applicable are:
* 1) An exception is taken from EL3 but the SCR does not have the exception
* routed to EL3.
* 2) An exception is taken from EL2 but the HCR does not have the exception
* routed to EL2.
* In these two cases, the below table contain a target of EL1. This value is
* returned as it is expected that the consumer of the table data will check
* for "target EL >= current EL" to ensure the exception is not taken.
*
* SCR HCR
* 64 EA AMO From
* BIT IRQ IMO Non-secure Secure
* EL3 FIQ RW FMO EL0 EL1 EL2 EL3 EL0 EL1 EL2 EL3
*/
static const int8_t target_el_table[2][2][2][2][2][4] = {
{{{{/* 0 0 0 0 */{ 1, 1, 2, -1 },{ 3, -1, -1, 3 },},
{/* 0 0 0 1 */{ 2, 2, 2, -1 },{ 3, -1, -1, 3 },},},
{{/* 0 0 1 0 */{ 1, 1, 2, -1 },{ 3, -1, -1, 3 },},
{/* 0 0 1 1 */{ 2, 2, 2, -1 },{ 3, -1, -1, 3 },},},},
{{{/* 0 1 0 0 */{ 3, 3, 3, -1 },{ 3, -1, -1, 3 },},
{/* 0 1 0 1 */{ 3, 3, 3, -1 },{ 3, -1, -1, 3 },},},
{{/* 0 1 1 0 */{ 3, 3, 3, -1 },{ 3, -1, -1, 3 },},
{/* 0 1 1 1 */{ 3, 3, 3, -1 },{ 3, -1, -1, 3 },},},},},
{{{{/* 1 0 0 0 */{ 1, 1, 2, -1 },{ 1, 1, -1, 1 },},
{/* 1 0 0 1 */{ 2, 2, 2, -1 },{ 1, 1, -1, 1 },},},
{{/* 1 0 1 0 */{ 1, 1, 1, -1 },{ 1, 1, -1, 1 },},
{/* 1 0 1 1 */{ 2, 2, 2, -1 },{ 1, 1, -1, 1 },},},},
{{{/* 1 1 0 0 */{ 3, 3, 3, -1 },{ 3, 3, -1, 3 },},
{/* 1 1 0 1 */{ 3, 3, 3, -1 },{ 3, 3, -1, 3 },},},
{{/* 1 1 1 0 */{ 3, 3, 3, -1 },{ 3, 3, -1, 3 },},
{/* 1 1 1 1 */{ 3, 3, 3, -1 },{ 3, 3, -1, 3 },},},},},
};
/*
* Determine the target EL for physical exceptions
*/
uint32_t arm_phys_excp_target_el(CPUState *cs, uint32_t excp_idx,
uint32_t cur_el, bool secure)
{
CPUARMState *env = cs->env_ptr;
int rw;
int scr;
int hcr;
int target_el;
/* Is the highest EL AArch64? */
int is64 = arm_feature(env, ARM_FEATURE_AARCH64);
if (arm_feature(env, ARM_FEATURE_EL3)) {
rw = ((env->cp15.scr_el3 & SCR_RW) == SCR_RW);
} else {
/* Either EL2 is the highest EL (and so the EL2 register width
* is given by is64); or there is no EL2 or EL3, in which case
* the value of 'rw' does not affect the table lookup anyway.
*/
rw = is64;
}
switch (excp_idx) {
case EXCP_IRQ:
scr = ((env->cp15.scr_el3 & SCR_IRQ) == SCR_IRQ);
hcr = ((env->cp15.hcr_el2 & HCR_IMO) == HCR_IMO);
break;
case EXCP_FIQ:
scr = ((env->cp15.scr_el3 & SCR_FIQ) == SCR_FIQ);
hcr = ((env->cp15.hcr_el2 & HCR_FMO) == HCR_FMO);
break;
default:
scr = ((env->cp15.scr_el3 & SCR_EA) == SCR_EA);
hcr = ((env->cp15.hcr_el2 & HCR_AMO) == HCR_AMO);
break;
};
/* If HCR.TGE is set then HCR is treated as being 1 */
hcr |= ((env->cp15.hcr_el2 & HCR_TGE) == HCR_TGE);
/* Perform a table-lookup for the target EL given the current state */
target_el = target_el_table[is64][scr][rw][hcr][secure][cur_el];
assert(target_el > 0);
return target_el;
}
static bool v7m_stack_write(ARMCPU *cpu, uint32_t addr, uint32_t value,
ARMMMUIdx mmu_idx, bool ignfault)
{
CPUState *cs = CPU(cpu);
CPUARMState *env = &cpu->env;
MemTxAttrs attrs = {};
MemTxResult txres;
target_ulong page_size;
hwaddr physaddr;
int prot;
ARMMMUFaultInfo fi;
bool secure = mmu_idx & ARM_MMU_IDX_M_S;
int exc;
bool exc_secure;
if (get_phys_addr(env, addr, MMU_DATA_STORE, mmu_idx, &physaddr,
&attrs, &prot, &page_size, &fi, NULL)) {
/* MPU/SAU lookup failed */
if (fi.type == ARMFault_QEMU_SFault) {
qemu_log_mask(CPU_LOG_INT,
"...SecureFault with SFSR.AUVIOL during stacking\n");
env->v7m.sfsr |= R_V7M_SFSR_AUVIOL_MASK | R_V7M_SFSR_SFARVALID_MASK;
env->v7m.sfar = addr;
exc = ARMV7M_EXCP_SECURE;
exc_secure = false;
} else {
qemu_log_mask(CPU_LOG_INT, "...MemManageFault with CFSR.MSTKERR\n");
env->v7m.cfsr[secure] |= R_V7M_CFSR_MSTKERR_MASK;
exc = ARMV7M_EXCP_MEM;
exc_secure = secure;
}
goto pend_fault;
}
address_space_stl_le(arm_addressspace(cs, attrs), physaddr, value,
attrs, &txres);
if (txres != MEMTX_OK) {
/* BusFault trying to write the data */
qemu_log_mask(CPU_LOG_INT, "...BusFault with BFSR.STKERR\n");
env->v7m.cfsr[M_REG_NS] |= R_V7M_CFSR_STKERR_MASK;
exc = ARMV7M_EXCP_BUS;
exc_secure = false;
goto pend_fault;
}
return true;
pend_fault:
/* By pending the exception at this point we are making
* the IMPDEF choice "overridden exceptions pended" (see the
* MergeExcInfo() pseudocode). The other choice would be to not
* pend them now and then make a choice about which to throw away
* later if we have two derived exceptions.
* The only case when we must not pend the exception but instead
* throw it away is if we are doing the push of the callee registers
* and we've already generated a derived exception. Even in this
* case we will still update the fault status registers.
*/
if (!ignfault) {
armv7m_nvic_set_pending_derived(env->nvic, exc, exc_secure);
}
return false;
}
static bool v7m_stack_read(ARMCPU *cpu, uint32_t *dest, uint32_t addr,
ARMMMUIdx mmu_idx)
{
CPUState *cs = CPU(cpu);
CPUARMState *env = &cpu->env;
MemTxAttrs attrs = {};
MemTxResult txres;
target_ulong page_size;
hwaddr physaddr;
int prot;
ARMMMUFaultInfo fi;
bool secure = mmu_idx & ARM_MMU_IDX_M_S;
int exc;
bool exc_secure;
uint32_t value;
if (get_phys_addr(env, addr, MMU_DATA_LOAD, mmu_idx, &physaddr,
&attrs, &prot, &page_size, &fi, NULL)) {
/* MPU/SAU lookup failed */
if (fi.type == ARMFault_QEMU_SFault) {
qemu_log_mask(CPU_LOG_INT,
"...SecureFault with SFSR.AUVIOL during unstack\n");
env->v7m.sfsr |= R_V7M_SFSR_AUVIOL_MASK | R_V7M_SFSR_SFARVALID_MASK;
env->v7m.sfar = addr;
exc = ARMV7M_EXCP_SECURE;
exc_secure = false;
} else {
qemu_log_mask(CPU_LOG_INT,
"...MemManageFault with CFSR.MUNSTKERR\n");
env->v7m.cfsr[secure] |= R_V7M_CFSR_MUNSTKERR_MASK;
exc = ARMV7M_EXCP_MEM;
exc_secure = secure;
}
goto pend_fault;
}
value = address_space_ldl(arm_addressspace(cs, attrs), physaddr,
attrs, &txres);
if (txres != MEMTX_OK) {
/* BusFault trying to read the data */
qemu_log_mask(CPU_LOG_INT, "...BusFault with BFSR.UNSTKERR\n");
env->v7m.cfsr[M_REG_NS] |= R_V7M_CFSR_UNSTKERR_MASK;
exc = ARMV7M_EXCP_BUS;
exc_secure = false;
goto pend_fault;
}
*dest = value;
return true;
pend_fault:
/* By pending the exception at this point we are making
* the IMPDEF choice "overridden exceptions pended" (see the
* MergeExcInfo() pseudocode). The other choice would be to not
* pend them now and then make a choice about which to throw away
* later if we have two derived exceptions.
*/
armv7m_nvic_set_pending(env->nvic, exc, exc_secure);
return false;
}
/* Return true if we're using the process stack pointer (not the MSP) */
static bool v7m_using_psp(CPUARMState *env)
{
/* Handler mode always uses the main stack; for thread mode
* the CONTROL.SPSEL bit determines the answer.
* Note that in v7M it is not possible to be in Handler mode with
* CONTROL.SPSEL non-zero, but in v8M it is, so we must check both.
*/
return !arm_v7m_is_handler_mode(env) &&
env->v7m.control[env->v7m.secure] & R_V7M_CONTROL_SPSEL_MASK;
}
/* Write to v7M CONTROL.SPSEL bit for the specified security bank.
* This may change the current stack pointer between Main and Process
* stack pointers if it is done for the CONTROL register for the current
* security state.
*/
static void write_v7m_control_spsel_for_secstate(CPUARMState *env,
bool new_spsel,
bool secstate)
{
bool old_is_psp = v7m_using_psp(env);
env->v7m.control[secstate] =
deposit32(env->v7m.control[secstate],
R_V7M_CONTROL_SPSEL_SHIFT,
R_V7M_CONTROL_SPSEL_LENGTH, new_spsel);
if (secstate == env->v7m.secure) {
bool new_is_psp = v7m_using_psp(env);
uint32_t tmp;
if (old_is_psp != new_is_psp) {
tmp = env->v7m.other_sp;
env->v7m.other_sp = env->regs[13];
env->regs[13] = tmp;
}
}
}
/* Write to v7M CONTROL.SPSEL bit. This may change the current
* stack pointer between Main and Process stack pointers.
*/
static void write_v7m_control_spsel(CPUARMState *env, bool new_spsel)
{
write_v7m_control_spsel_for_secstate(env, new_spsel, env->v7m.secure);
}
void write_v7m_exception(CPUARMState *env, uint32_t new_exc)
{
/* Write a new value to v7m.exception, thus transitioning into or out
* of Handler mode; this may result in a change of active stack pointer.
*/
bool new_is_psp, old_is_psp = v7m_using_psp(env);
uint32_t tmp;
env->v7m.exception = new_exc;
new_is_psp = v7m_using_psp(env);
if (old_is_psp != new_is_psp) {
tmp = env->v7m.other_sp;
env->v7m.other_sp = env->regs[13];
env->regs[13] = tmp;
}
}
/* Switch M profile security state between NS and S */
static void switch_v7m_security_state(CPUARMState *env, bool new_secstate)
{
uint32_t new_ss_msp, new_ss_psp;
if (env->v7m.secure == new_secstate) {
return;
}
/* All the banked state is accessed by looking at env->v7m.secure
* except for the stack pointer; rearrange the SP appropriately.
*/
new_ss_msp = env->v7m.other_ss_msp;
new_ss_psp = env->v7m.other_ss_psp;
if (v7m_using_psp(env)) {
env->v7m.other_ss_psp = env->regs[13];
env->v7m.other_ss_msp = env->v7m.other_sp;
} else {
env->v7m.other_ss_msp = env->regs[13];
env->v7m.other_ss_psp = env->v7m.other_sp;
}
env->v7m.secure = new_secstate;
if (v7m_using_psp(env)) {
env->regs[13] = new_ss_psp;
env->v7m.other_sp = new_ss_msp;
} else {
env->regs[13] = new_ss_msp;
env->v7m.other_sp = new_ss_psp;
}
}
void HELPER(v7m_bxns)(CPUARMState *env, uint32_t dest)
{
/* Handle v7M BXNS:
* - if the return value is a magic value, do exception return (like BX)
* - otherwise bit 0 of the return value is the target security state
*/
uint32_t min_magic;
if (arm_feature(env, ARM_FEATURE_M_SECURITY)) {
/* Covers FNC_RETURN and EXC_RETURN magic */
min_magic = FNC_RETURN_MIN_MAGIC;
} else {
/* EXC_RETURN magic only */
min_magic = EXC_RETURN_MIN_MAGIC;
}
if (dest >= min_magic) {
/* This is an exception return magic value; put it where
* do_v7m_exception_exit() expects and raise EXCEPTION_EXIT.
* Note that if we ever add gen_ss_advance() singlestep support to
* M profile this should count as an "instruction execution complete"
* event (compare gen_bx_excret_final_code()).
*/
env->regs[15] = dest & ~1;
env->thumb = dest & 1;
HELPER(exception_internal)(env, EXCP_EXCEPTION_EXIT);
/* notreached */
}
/* translate.c should have made BXNS UNDEF unless we're secure */
assert(env->v7m.secure);
switch_v7m_security_state(env, dest & 1);
env->thumb = 1;
env->regs[15] = dest & ~1;
}
void HELPER(v7m_blxns)(CPUARMState *env, uint32_t dest)
{
/* Handle v7M BLXNS:
* - bit 0 of the destination address is the target security state
*/
/* At this point regs[15] is the address just after the BLXNS */
uint32_t nextinst = env->regs[15] | 1;
uint32_t sp = env->regs[13] - 8;
uint32_t saved_psr;
/* translate.c will have made BLXNS UNDEF unless we're secure */
assert(env->v7m.secure);
if (dest & 1) {
/* target is Secure, so this is just a normal BLX,
* except that the low bit doesn't indicate Thumb/not.
*/
env->regs[14] = nextinst;
env->thumb = 1;
env->regs[15] = dest & ~1;
return;
}
/* Target is non-secure: first push a stack frame */
if (!QEMU_IS_ALIGNED(sp, 8)) {
qemu_log_mask(LOG_GUEST_ERROR,
"BLXNS with misaligned SP is UNPREDICTABLE\n");
}
saved_psr = env->v7m.exception;
if (env->v7m.control[M_REG_S] & R_V7M_CONTROL_SFPA_MASK) {
saved_psr |= XPSR_SFPA;
}
/* Note that these stores can throw exceptions on MPU faults */
cpu_stl_data(env, sp, nextinst);
cpu_stl_data(env, sp + 4, saved_psr);
env->regs[13] = sp;
env->regs[14] = 0xfeffffff;
if (arm_v7m_is_handler_mode(env)) {
/* Write a dummy value to IPSR, to avoid leaking the current secure
* exception number to non-secure code. This is guaranteed not
* to cause write_v7m_exception() to actually change stacks.
*/
write_v7m_exception(env, 1);
}
switch_v7m_security_state(env, 0);
env->thumb = 1;
env->regs[15] = dest;
}
static uint32_t *get_v7m_sp_ptr(CPUARMState *env, bool secure, bool threadmode,
bool spsel)
{
/* Return a pointer to the location where we currently store the
* stack pointer for the requested security state and thread mode.
* This pointer will become invalid if the CPU state is updated
* such that the stack pointers are switched around (eg changing
* the SPSEL control bit).
* Compare the v8M ARM ARM pseudocode LookUpSP_with_security_mode().
* Unlike that pseudocode, we require the caller to pass us in the
* SPSEL control bit value; this is because we also use this
* function in handling of pushing of the callee-saves registers
* part of the v8M stack frame (pseudocode PushCalleeStack()),
* and in the tailchain codepath the SPSEL bit comes from the exception
* return magic LR value from the previous exception. The pseudocode
* opencodes the stack-selection in PushCalleeStack(), but we prefer
* to make this utility function generic enough to do the job.
*/
bool want_psp = threadmode && spsel;
if (secure == env->v7m.secure) {
if (want_psp == v7m_using_psp(env)) {
return &env->regs[13];
} else {
return &env->v7m.other_sp;
}
} else {
if (want_psp) {
return &env->v7m.other_ss_psp;
} else {
return &env->v7m.other_ss_msp;
}
}
}
static bool arm_v7m_load_vector(ARMCPU *cpu, int exc, bool targets_secure,
uint32_t *pvec)
{
CPUState *cs = CPU(cpu);
CPUARMState *env = &cpu->env;
MemTxResult result;
uint32_t addr = env->v7m.vecbase[targets_secure] + exc * 4;
uint32_t vector_entry;
MemTxAttrs attrs = {};
ARMMMUIdx mmu_idx;
bool exc_secure;
mmu_idx = arm_v7m_mmu_idx_for_secstate_and_priv(env, targets_secure, true);
/* We don't do a get_phys_addr() here because the rules for vector
* loads are special: they always use the default memory map, and
* the default memory map permits reads from all addresses.
* Since there's no easy way to pass through to pmsav8_mpu_lookup()
* that we want this special case which would always say "yes",
* we just do the SAU lookup here followed by a direct physical load.
*/
attrs.secure = targets_secure;
attrs.user = false;
if (arm_feature(env, ARM_FEATURE_M_SECURITY)) {
V8M_SAttributes sattrs = {};
v8m_security_lookup(env, addr, MMU_DATA_LOAD, mmu_idx, &sattrs);
if (sattrs.ns) {
attrs.secure = false;
} else if (!targets_secure) {
/* NS access to S memory */
goto load_fail;
}
}
vector_entry = address_space_ldl(arm_addressspace(cs, attrs), addr,
attrs, &result);
if (result != MEMTX_OK) {
goto load_fail;
}
*pvec = vector_entry;
return true;
load_fail:
/* All vector table fetch fails are reported as HardFault, with
* HFSR.VECTTBL and .FORCED set. (FORCED is set because
* technically the underlying exception is a MemManage or BusFault
* that is escalated to HardFault.) This is a terminal exception,
* so we will either take the HardFault immediately or else enter
* lockup (the latter case is handled in armv7m_nvic_set_pending_derived()).
*/
exc_secure = targets_secure ||
!(cpu->env.v7m.aircr & R_V7M_AIRCR_BFHFNMINS_MASK);
env->v7m.hfsr |= R_V7M_HFSR_VECTTBL_MASK | R_V7M_HFSR_FORCED_MASK;
armv7m_nvic_set_pending_derived(env->nvic, ARMV7M_EXCP_HARD, exc_secure);
return false;
}
static bool v7m_push_callee_stack(ARMCPU *cpu, uint32_t lr, bool dotailchain,
bool ignore_faults)
{
/* For v8M, push the callee-saves register part of the stack frame.
* Compare the v8M pseudocode PushCalleeStack().
* In the tailchaining case this may not be the current stack.
*/
CPUARMState *env = &cpu->env;
uint32_t *frame_sp_p;
uint32_t frameptr;
ARMMMUIdx mmu_idx;
bool stacked_ok;
if (dotailchain) {
bool mode = lr & R_V7M_EXCRET_MODE_MASK;
bool priv = !(env->v7m.control[M_REG_S] & R_V7M_CONTROL_NPRIV_MASK) ||
!mode;
mmu_idx = arm_v7m_mmu_idx_for_secstate_and_priv(env, M_REG_S, priv);
frame_sp_p = get_v7m_sp_ptr(env, M_REG_S, mode,
lr & R_V7M_EXCRET_SPSEL_MASK);
} else {
mmu_idx = core_to_arm_mmu_idx(env, cpu_mmu_index(env, false));
frame_sp_p = &env->regs[13];
}
frameptr = *frame_sp_p - 0x28;
/* Write as much of the stack frame as we can. A write failure may
* cause us to pend a derived exception.
*/
stacked_ok =
v7m_stack_write(cpu, frameptr, 0xfefa125b, mmu_idx, ignore_faults) &&
v7m_stack_write(cpu, frameptr + 0x8, env->regs[4], mmu_idx,
ignore_faults) &&
v7m_stack_write(cpu, frameptr + 0xc, env->regs[5], mmu_idx,
ignore_faults) &&
v7m_stack_write(cpu, frameptr + 0x10, env->regs[6], mmu_idx,
ignore_faults) &&
v7m_stack_write(cpu, frameptr + 0x14, env->regs[7], mmu_idx,
ignore_faults) &&
v7m_stack_write(cpu, frameptr + 0x18, env->regs[8], mmu_idx,
ignore_faults) &&
v7m_stack_write(cpu, frameptr + 0x1c, env->regs[9], mmu_idx,
ignore_faults) &&
v7m_stack_write(cpu, frameptr + 0x20, env->regs[10], mmu_idx,
ignore_faults) &&
v7m_stack_write(cpu, frameptr + 0x24, env->regs[11], mmu_idx,
ignore_faults);
/* Update SP regardless of whether any of the stack accesses failed.
* When we implement v8M stack limit checking then this attempt to
* update SP might also fail and result in a derived exception.
*/
*frame_sp_p = frameptr;
return !stacked_ok;
}
static void v7m_exception_taken(ARMCPU *cpu, uint32_t lr, bool dotailchain,
bool ignore_stackfaults)
{
/* Do the "take the exception" parts of exception entry,
* but not the pushing of state to the stack. This is
* similar to the pseudocode ExceptionTaken() function.
*/
CPUARMState *env = &cpu->env;
uint32_t addr;
bool targets_secure;
int exc;
bool push_failed = false;
armv7m_nvic_get_pending_irq_info(env->nvic, &exc, &targets_secure);
if (arm_feature(env, ARM_FEATURE_V8)) {
if (arm_feature(env, ARM_FEATURE_M_SECURITY) &&
(lr & R_V7M_EXCRET_S_MASK)) {
/* The background code (the owner of the registers in the
* exception frame) is Secure. This means it may either already
* have or now needs to push callee-saves registers.
*/
if (targets_secure) {
if (dotailchain && !(lr & R_V7M_EXCRET_ES_MASK)) {
/* We took an exception from Secure to NonSecure
* (which means the callee-saved registers got stacked)
* and are now tailchaining to a Secure exception.
* Clear DCRS so eventual return from this Secure
* exception unstacks the callee-saved registers.
*/
lr &= ~R_V7M_EXCRET_DCRS_MASK;
}
} else {
/* We're going to a non-secure exception; push the
* callee-saves registers to the stack now, if they're
* not already saved.
*/
if (lr & R_V7M_EXCRET_DCRS_MASK &&
!(dotailchain && (lr & R_V7M_EXCRET_ES_MASK))) {
push_failed = v7m_push_callee_stack(cpu, lr, dotailchain,
ignore_stackfaults);
}
lr |= R_V7M_EXCRET_DCRS_MASK;
}
}
lr &= ~R_V7M_EXCRET_ES_MASK;
if (targets_secure || !arm_feature(env, ARM_FEATURE_M_SECURITY)) {
lr |= R_V7M_EXCRET_ES_MASK;
}
lr &= ~R_V7M_EXCRET_SPSEL_MASK;
if (env->v7m.control[targets_secure] & R_V7M_CONTROL_SPSEL_MASK) {
lr |= R_V7M_EXCRET_SPSEL_MASK;
}
/* Clear registers if necessary to prevent non-secure exception
* code being able to see register values from secure code.
* Where register values become architecturally UNKNOWN we leave
* them with their previous values.
*/
if (arm_feature(env, ARM_FEATURE_M_SECURITY)) {
if (!targets_secure) {
/* Always clear the caller-saved registers (they have been
* pushed to the stack earlier in v7m_push_stack()).
* Clear callee-saved registers if the background code is
* Secure (in which case these regs were saved in
* v7m_push_callee_stack()).
*/
int i;
for (i = 0; i < 13; i++) {
/* r4..r11 are callee-saves, zero only if EXCRET.S == 1 */
if (i < 4 || i > 11 || (lr & R_V7M_EXCRET_S_MASK)) {
env->regs[i] = 0;
}
}
/* Clear EAPSR */
xpsr_write(env, 0, XPSR_NZCV | XPSR_Q | XPSR_GE | XPSR_IT);
}
}
}
if (push_failed && !ignore_stackfaults) {
/* Derived exception on callee-saves register stacking:
* we might now want to take a different exception which
* targets a different security state, so try again from the top.
*/
v7m_exception_taken(cpu, lr, true, true);
return;
}
if (!arm_v7m_load_vector(cpu, exc, targets_secure, &addr)) {
/* Vector load failed: derived exception */
v7m_exception_taken(cpu, lr, true, true);
return;
}
/* Now we've done everything that might cause a derived exception
* we can go ahead and activate whichever exception we're going to
* take (which might now be the derived exception).
*/
armv7m_nvic_acknowledge_irq(env->nvic);
/* Switch to target security state -- must do this before writing SPSEL */
switch_v7m_security_state(env, targets_secure);
write_v7m_control_spsel(env, 0);
arm_clear_exclusive(env);
/* Clear IT bits */
env->condexec_bits = 0;
env->regs[14] = lr;
env->regs[15] = addr & 0xfffffffe;
env->thumb = addr & 1;
}
static bool v7m_push_stack(ARMCPU *cpu)
{
/* Do the "set up stack frame" part of exception entry,
* similar to pseudocode PushStack().
* Return true if we generate a derived exception (and so
* should ignore further stack faults trying to process
* that derived exception.)
*/
bool stacked_ok;
CPUARMState *env = &cpu->env;
uint32_t xpsr = xpsr_read(env);
uint32_t frameptr = env->regs[13];
ARMMMUIdx mmu_idx = core_to_arm_mmu_idx(env, cpu_mmu_index(env, false));
/* Align stack pointer if the guest wants that */
if ((frameptr & 4) &&
(env->v7m.ccr[env->v7m.secure] & R_V7M_CCR_STKALIGN_MASK)) {
frameptr -= 4;
xpsr |= XPSR_SPREALIGN;
}
frameptr -= 0x20;
/* Write as much of the stack frame as we can. If we fail a stack
* write this will result in a derived exception being pended
* (which may be taken in preference to the one we started with
* if it has higher priority).
*/
stacked_ok =
v7m_stack_write(cpu, frameptr, env->regs[0], mmu_idx, false) &&
v7m_stack_write(cpu, frameptr + 4, env->regs[1], mmu_idx, false) &&
v7m_stack_write(cpu, frameptr + 8, env->regs[2], mmu_idx, false) &&
v7m_stack_write(cpu, frameptr + 12, env->regs[3], mmu_idx, false) &&
v7m_stack_write(cpu, frameptr + 16, env->regs[12], mmu_idx, false) &&
v7m_stack_write(cpu, frameptr + 20, env->regs[14], mmu_idx, false) &&
v7m_stack_write(cpu, frameptr + 24, env->regs[15], mmu_idx, false) &&
v7m_stack_write(cpu, frameptr + 28, xpsr, mmu_idx, false);
/* Update SP regardless of whether any of the stack accesses failed.
* When we implement v8M stack limit checking then this attempt to
* update SP might also fail and result in a derived exception.
*/
env->regs[13] = frameptr;
return !stacked_ok;
}
static void do_v7m_exception_exit(ARMCPU *cpu)
{
CPUARMState *env = &cpu->env;
uint32_t excret;
uint32_t xpsr;
bool ufault = false;
bool sfault = false;
bool return_to_sp_process;
bool return_to_handler;
bool rettobase = false;
bool exc_secure = false;
bool return_to_secure;
/* If we're not in Handler mode then jumps to magic exception-exit
* addresses don't have magic behaviour. However for the v8M
* security extensions the magic secure-function-return has to
* work in thread mode too, so to avoid doing an extra check in
* the generated code we allow exception-exit magic to also cause the
* internal exception and bring us here in thread mode. Correct code
* will never try to do this (the following insn fetch will always
* fault) so we the overhead of having taken an unnecessary exception
* doesn't matter.
*/
if (!arm_v7m_is_handler_mode(env)) {
return;
}
/* In the spec pseudocode ExceptionReturn() is called directly
* from BXWritePC() and gets the full target PC value including
* bit zero. In QEMU's implementation we treat it as a normal
* jump-to-register (which is then caught later on), and so split
* the target value up between env->regs[15] and env->thumb in
* gen_bx(). Reconstitute it.
*/
excret = env->regs[15];
if (env->thumb) {
excret |= 1;
}
qemu_log_mask(CPU_LOG_INT, "Exception return: magic PC %" PRIx32
" previous exception %d\n",
excret, env->v7m.exception);
if ((excret & R_V7M_EXCRET_RES1_MASK) != R_V7M_EXCRET_RES1_MASK) {
qemu_log_mask(LOG_GUEST_ERROR, "M profile: zero high bits in exception "
"exit PC value 0x%" PRIx32 " are UNPREDICTABLE\n",
excret);
}
if (arm_feature(env, ARM_FEATURE_M_SECURITY)) {
/* EXC_RETURN.ES validation check (R_SMFL). We must do this before
* we pick which FAULTMASK to clear.
*/
if (!env->v7m.secure &&
((excret & R_V7M_EXCRET_ES_MASK) ||
!(excret & R_V7M_EXCRET_DCRS_MASK))) {
sfault = 1;
/* For all other purposes, treat ES as 0 (R_HXSR) */
excret &= ~R_V7M_EXCRET_ES_MASK;
}
}
if (env->v7m.exception != ARMV7M_EXCP_NMI) {
/* Auto-clear FAULTMASK on return from other than NMI.
* If the security extension is implemented then this only
* happens if the raw execution priority is >= 0; the
* value of the ES bit in the exception return value indicates
* which security state's faultmask to clear. (v8M ARM ARM R_KBNF.)
*/
if (arm_feature(env, ARM_FEATURE_M_SECURITY)) {
exc_secure = excret & R_V7M_EXCRET_ES_MASK;
if (armv7m_nvic_raw_execution_priority(env->nvic) >= 0) {
env->v7m.faultmask[exc_secure] = 0;
}
} else {
env->v7m.faultmask[M_REG_NS] = 0;
}
}
switch (armv7m_nvic_complete_irq(env->nvic, env->v7m.exception,
exc_secure)) {
case -1:
/* attempt to exit an exception that isn't active */
ufault = true;
break;
case 0:
/* still an irq active now */
break;
case 1:
/* we returned to base exception level, no nesting.
* (In the pseudocode this is written using "NestedActivation != 1"
* where we have 'rettobase == false'.)
*/
rettobase = true;
break;
default:
g_assert_not_reached();
}
return_to_handler = !(excret & R_V7M_EXCRET_MODE_MASK);
return_to_sp_process = excret & R_V7M_EXCRET_SPSEL_MASK;
return_to_secure = arm_feature(env, ARM_FEATURE_M_SECURITY) &&
(excret & R_V7M_EXCRET_S_MASK);
if (arm_feature(env, ARM_FEATURE_V8)) {
if (!arm_feature(env, ARM_FEATURE_M_SECURITY)) {
/* UNPREDICTABLE if S == 1 or DCRS == 0 or ES == 1 (R_XLCP);
* we choose to take the UsageFault.
*/
if ((excret & R_V7M_EXCRET_S_MASK) ||
(excret & R_V7M_EXCRET_ES_MASK) ||
!(excret & R_V7M_EXCRET_DCRS_MASK)) {
ufault = true;
}
}
if (excret & R_V7M_EXCRET_RES0_MASK) {
ufault = true;
}
} else {
/* For v7M we only recognize certain combinations of the low bits */
switch (excret & 0xf) {
case 1: /* Return to Handler */
break;
case 13: /* Return to Thread using Process stack */
case 9: /* Return to Thread using Main stack */
/* We only need to check NONBASETHRDENA for v7M, because in
* v8M this bit does not exist (it is RES1).
*/
if (!rettobase &&
!(env->v7m.ccr[env->v7m.secure] &
R_V7M_CCR_NONBASETHRDENA_MASK)) {
ufault = true;
}
break;
default:
ufault = true;
}
}
if (sfault) {
env->v7m.sfsr |= R_V7M_SFSR_INVER_MASK;
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_SECURE, false);
v7m_exception_taken(cpu, excret, true, false);
qemu_log_mask(CPU_LOG_INT, "...taking SecureFault on existing "
"stackframe: failed EXC_RETURN.ES validity check\n");
return;
}
if (ufault) {
/* Bad exception return: instead of popping the exception
* stack, directly take a usage fault on the current stack.
*/
env->v7m.cfsr[env->v7m.secure] |= R_V7M_CFSR_INVPC_MASK;
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE, env->v7m.secure);
v7m_exception_taken(cpu, excret, true, false);
qemu_log_mask(CPU_LOG_INT, "...taking UsageFault on existing "
"stackframe: failed exception return integrity check\n");
return;
}
/* Set CONTROL.SPSEL from excret.SPSEL. Since we're still in
* Handler mode (and will be until we write the new XPSR.Interrupt
* field) this does not switch around the current stack pointer.
*/
write_v7m_control_spsel_for_secstate(env, return_to_sp_process, exc_secure);
switch_v7m_security_state(env, return_to_secure);
{
/* The stack pointer we should be reading the exception frame from
* depends on bits in the magic exception return type value (and
* for v8M isn't necessarily the stack pointer we will eventually
* end up resuming execution with). Get a pointer to the location
* in the CPU state struct where the SP we need is currently being
* stored; we will use and modify it in place.
* We use this limited C variable scope so we don't accidentally
* use 'frame_sp_p' after we do something that makes it invalid.
*/
uint32_t *frame_sp_p = get_v7m_sp_ptr(env,
return_to_secure,
!return_to_handler,
return_to_sp_process);
uint32_t frameptr = *frame_sp_p;
bool pop_ok = true;
ARMMMUIdx mmu_idx;
mmu_idx = arm_v7m_mmu_idx_for_secstate_and_priv(env, return_to_secure,
!return_to_handler);
if (!QEMU_IS_ALIGNED(frameptr, 8) &&
arm_feature(env, ARM_FEATURE_V8)) {
qemu_log_mask(LOG_GUEST_ERROR,
"M profile exception return with non-8-aligned SP "
"for destination state is UNPREDICTABLE\n");
}
/* Do we need to pop callee-saved registers? */
if (return_to_secure &&
((excret & R_V7M_EXCRET_ES_MASK) == 0 ||
(excret & R_V7M_EXCRET_DCRS_MASK) == 0)) {
uint32_t expected_sig = 0xfefa125b;
uint32_t actual_sig;
pop_ok = v7m_stack_read(cpu, &actual_sig, frameptr, mmu_idx);
if (pop_ok && expected_sig != actual_sig) {
/* Take a SecureFault on the current stack */
env->v7m.sfsr |= R_V7M_SFSR_INVIS_MASK;
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_SECURE, false);
v7m_exception_taken(cpu, excret, true, false);
qemu_log_mask(CPU_LOG_INT, "...taking SecureFault on existing "
"stackframe: failed exception return integrity "
"signature check\n");
return;
}
pop_ok = pop_ok &&
v7m_stack_read(cpu, &env->regs[4], frameptr + 0x8, mmu_idx) &&
v7m_stack_read(cpu, &env->regs[4], frameptr + 0x8, mmu_idx) &&
v7m_stack_read(cpu, &env->regs[5], frameptr + 0xc, mmu_idx) &&
v7m_stack_read(cpu, &env->regs[6], frameptr + 0x10, mmu_idx) &&
v7m_stack_read(cpu, &env->regs[7], frameptr + 0x14, mmu_idx) &&
v7m_stack_read(cpu, &env->regs[8], frameptr + 0x18, mmu_idx) &&
v7m_stack_read(cpu, &env->regs[9], frameptr + 0x1c, mmu_idx) &&
v7m_stack_read(cpu, &env->regs[10], frameptr + 0x20, mmu_idx) &&
v7m_stack_read(cpu, &env->regs[11], frameptr + 0x24, mmu_idx);
frameptr += 0x28;
}
/* Pop registers */
pop_ok = pop_ok &&
v7m_stack_read(cpu, &env->regs[0], frameptr, mmu_idx) &&
v7m_stack_read(cpu, &env->regs[1], frameptr + 0x4, mmu_idx) &&
v7m_stack_read(cpu, &env->regs[2], frameptr + 0x8, mmu_idx) &&
v7m_stack_read(cpu, &env->regs[3], frameptr + 0xc, mmu_idx) &&
v7m_stack_read(cpu, &env->regs[12], frameptr + 0x10, mmu_idx) &&
v7m_stack_read(cpu, &env->regs[14], frameptr + 0x14, mmu_idx) &&
v7m_stack_read(cpu, &env->regs[15], frameptr + 0x18, mmu_idx) &&
v7m_stack_read(cpu, &xpsr, frameptr + 0x1c, mmu_idx);
if (!pop_ok) {
/* v7m_stack_read() pended a fault, so take it (as a tail
* chained exception on the same stack frame)
*/
v7m_exception_taken(cpu, excret, true, false);
return;
}
/* Returning from an exception with a PC with bit 0 set is defined
* behaviour on v8M (bit 0 is ignored), but for v7M it was specified
* to be UNPREDICTABLE. In practice actual v7M hardware seems to ignore
* the lsbit, and there are several RTOSes out there which incorrectly
* assume the r15 in the stack frame should be a Thumb-style "lsbit
* indicates ARM/Thumb" value, so ignore the bit on v7M as well, but
* complain about the badly behaved guest.
*/
if (env->regs[15] & 1) {
env->regs[15] &= ~1U;
if (!arm_feature(env, ARM_FEATURE_V8)) {
qemu_log_mask(LOG_GUEST_ERROR,
"M profile return from interrupt with misaligned "
"PC is UNPREDICTABLE on v7M\n");
}
}
if (arm_feature(env, ARM_FEATURE_V8)) {
/* For v8M we have to check whether the xPSR exception field
* matches the EXCRET value for return to handler/thread
* before we commit to changing the SP and xPSR.
*/
bool will_be_handler = (xpsr & XPSR_EXCP) != 0;
if (return_to_handler != will_be_handler) {
/* Take an INVPC UsageFault on the current stack.
* By this point we will have switched to the security state
* for the background state, so this UsageFault will target
* that state.
*/
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE,
env->v7m.secure);
env->v7m.cfsr[env->v7m.secure] |= R_V7M_CFSR_INVPC_MASK;
v7m_exception_taken(cpu, excret, true, false);
qemu_log_mask(CPU_LOG_INT, "...taking UsageFault on existing "
"stackframe: failed exception return integrity "
"check\n");
return;
}
}
/* Commit to consuming the stack frame */
frameptr += 0x20;
/* Undo stack alignment (the SPREALIGN bit indicates that the original
* pre-exception SP was not 8-aligned and we added a padding word to
* align it, so we undo this by ORing in the bit that increases it
* from the current 8-aligned value to the 8-unaligned value. (Adding 4
* would work too but a logical OR is how the pseudocode specifies it.)
*/
if (xpsr & XPSR_SPREALIGN) {
frameptr |= 4;
}
*frame_sp_p = frameptr;
}
/* This xpsr_write() will invalidate frame_sp_p as it may switch stack */
xpsr_write(env, xpsr, ~XPSR_SPREALIGN);
/* The restored xPSR exception field will be zero if we're
* resuming in Thread mode. If that doesn't match what the
* exception return excret specified then this is a UsageFault.
* v7M requires we make this check here; v8M did it earlier.
*/
if (return_to_handler != arm_v7m_is_handler_mode(env)) {
/* Take an INVPC UsageFault by pushing the stack again;
* we know we're v7M so this is never a Secure UsageFault.
*/
bool ignore_stackfaults;
assert(!arm_feature(env, ARM_FEATURE_V8));
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE, false);
env->v7m.cfsr[env->v7m.secure] |= R_V7M_CFSR_INVPC_MASK;
ignore_stackfaults = v7m_push_stack(cpu);
v7m_exception_taken(cpu, excret, false, ignore_stackfaults);
qemu_log_mask(CPU_LOG_INT, "...taking UsageFault on new stackframe: "
"failed exception return integrity check\n");
return;
}
/* Otherwise, we have a successful exception exit. */
arm_clear_exclusive(env);
qemu_log_mask(CPU_LOG_INT, "...successful exception return\n");
}
static bool do_v7m_function_return(ARMCPU *cpu)
{
/* v8M security extensions magic function return.
* We may either:
* (1) throw an exception (longjump)
* (2) return true if we successfully handled the function return
* (3) return false if we failed a consistency check and have
* pended a UsageFault that needs to be taken now
*
* At this point the magic return value is split between env->regs[15]
* and env->thumb. We don't bother to reconstitute it because we don't
* need it (all values are handled the same way).
*/
CPUARMState *env = &cpu->env;
uint32_t newpc, newpsr, newpsr_exc;
qemu_log_mask(CPU_LOG_INT, "...really v7M secure function return\n");
{
bool threadmode, spsel;
TCGMemOpIdx oi;
ARMMMUIdx mmu_idx;
uint32_t *frame_sp_p;
uint32_t frameptr;
/* Pull the return address and IPSR from the Secure stack */
threadmode = !arm_v7m_is_handler_mode(env);
spsel = env->v7m.control[M_REG_S] & R_V7M_CONTROL_SPSEL_MASK;
frame_sp_p = get_v7m_sp_ptr(env, true, threadmode, spsel);
frameptr = *frame_sp_p;
/* These loads may throw an exception (for MPU faults). We want to
* do them as secure, so work out what MMU index that is.
*/
mmu_idx = arm_v7m_mmu_idx_for_secstate(env, true);
oi = make_memop_idx(MO_LE, arm_to_core_mmu_idx(mmu_idx));
newpc = helper_le_ldul_mmu(env, frameptr, oi, 0);
newpsr = helper_le_ldul_mmu(env, frameptr + 4, oi, 0);
/* Consistency checks on new IPSR */
newpsr_exc = newpsr & XPSR_EXCP;
if (!((env->v7m.exception == 0 && newpsr_exc == 0) ||
(env->v7m.exception == 1 && newpsr_exc != 0))) {
/* Pend the fault and tell our caller to take it */
env->v7m.cfsr[env->v7m.secure] |= R_V7M_CFSR_INVPC_MASK;
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE,
env->v7m.secure);
qemu_log_mask(CPU_LOG_INT,
"...taking INVPC UsageFault: "
"IPSR consistency check failed\n");
return false;
}
*frame_sp_p = frameptr + 8;
}
/* This invalidates frame_sp_p */
switch_v7m_security_state(env, true);
env->v7m.exception = newpsr_exc;
env->v7m.control[M_REG_S] &= ~R_V7M_CONTROL_SFPA_MASK;
if (newpsr & XPSR_SFPA) {
env->v7m.control[M_REG_S] |= R_V7M_CONTROL_SFPA_MASK;
}
xpsr_write(env, 0, XPSR_IT);
env->thumb = newpc & 1;
env->regs[15] = newpc & ~1;
qemu_log_mask(CPU_LOG_INT, "...function return successful\n");
return true;
}
static void arm_log_exception(int idx)
{
if (qemu_loglevel_mask(CPU_LOG_INT)) {
const char *exc = NULL;
static const char * const excnames[] = {
[EXCP_UDEF] = "Undefined Instruction",
[EXCP_SWI] = "SVC",
[EXCP_PREFETCH_ABORT] = "Prefetch Abort",
[EXCP_DATA_ABORT] = "Data Abort",
[EXCP_IRQ] = "IRQ",
[EXCP_FIQ] = "FIQ",
[EXCP_BKPT] = "Breakpoint",
[EXCP_EXCEPTION_EXIT] = "QEMU v7M exception exit",
[EXCP_KERNEL_TRAP] = "QEMU intercept of kernel commpage",
[EXCP_HVC] = "Hypervisor Call",
[EXCP_HYP_TRAP] = "Hypervisor Trap",
[EXCP_SMC] = "Secure Monitor Call",
[EXCP_VIRQ] = "Virtual IRQ",
[EXCP_VFIQ] = "Virtual FIQ",
[EXCP_SEMIHOST] = "Semihosting call",
[EXCP_NOCP] = "v7M NOCP UsageFault",
[EXCP_INVSTATE] = "v7M INVSTATE UsageFault",
};
if (idx >= 0 && idx < ARRAY_SIZE(excnames)) {
exc = excnames[idx];
}
if (!exc) {
exc = "unknown";
}
qemu_log_mask(CPU_LOG_INT, "Taking exception %d [%s]\n", idx, exc);
}
}
static bool v7m_read_half_insn(ARMCPU *cpu, ARMMMUIdx mmu_idx,
uint32_t addr, uint16_t *insn)
{
/* Load a 16-bit portion of a v7M instruction, returning true on success,
* or false on failure (in which case we will have pended the appropriate
* exception).
* We need to do the instruction fetch's MPU and SAU checks
* like this because there is no MMU index that would allow
* doing the load with a single function call. Instead we must
* first check that the security attributes permit the load
* and that they don't mismatch on the two halves of the instruction,
* and then we do the load as a secure load (ie using the security
* attributes of the address, not the CPU, as architecturally required).
*/
CPUState *cs = CPU(cpu);
CPUARMState *env = &cpu->env;
V8M_SAttributes sattrs = {};
MemTxAttrs attrs = {};
ARMMMUFaultInfo fi = {};
MemTxResult txres;
target_ulong page_size;
hwaddr physaddr;
int prot;
v8m_security_lookup(env, addr, MMU_INST_FETCH, mmu_idx, &sattrs);
if (!sattrs.nsc || sattrs.ns) {
/* This must be the second half of the insn, and it straddles a
* region boundary with the second half not being S&NSC.
*/
env->v7m.sfsr |= R_V7M_SFSR_INVEP_MASK;
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_SECURE, false);
qemu_log_mask(CPU_LOG_INT,
"...really SecureFault with SFSR.INVEP\n");
return false;
}
if (get_phys_addr(env, addr, MMU_INST_FETCH, mmu_idx,
&physaddr, &attrs, &prot, &page_size, &fi, NULL)) {
/* the MPU lookup failed */
env->v7m.cfsr[env->v7m.secure] |= R_V7M_CFSR_IACCVIOL_MASK;
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_MEM, env->v7m.secure);
qemu_log_mask(CPU_LOG_INT, "...really MemManage with CFSR.IACCVIOL\n");
return false;
}
*insn = address_space_lduw_le(arm_addressspace(cs, attrs), physaddr,
attrs, &txres);
if (txres != MEMTX_OK) {
env->v7m.cfsr[M_REG_NS] |= R_V7M_CFSR_IBUSERR_MASK;
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_BUS, false);
qemu_log_mask(CPU_LOG_INT, "...really BusFault with CFSR.IBUSERR\n");
return false;
}
return true;
}
static bool v7m_handle_execute_nsc(ARMCPU *cpu)
{
/* Check whether this attempt to execute code in a Secure & NS-Callable
* memory region is for an SG instruction; if so, then emulate the
* effect of the SG instruction and return true. Otherwise pend
* the correct kind of exception and return false.
*/
CPUARMState *env = &cpu->env;
ARMMMUIdx mmu_idx;
uint16_t insn;
/* We should never get here unless get_phys_addr_pmsav8() caused
* an exception for NS executing in S&NSC memory.
*/
assert(!env->v7m.secure);
assert(arm_feature(env, ARM_FEATURE_M_SECURITY));
/* We want to do the MPU lookup as secure; work out what mmu_idx that is */
mmu_idx = arm_v7m_mmu_idx_for_secstate(env, true);
if (!v7m_read_half_insn(cpu, mmu_idx, env->regs[15], &insn)) {
return false;
}
if (!env->thumb) {
goto gen_invep;
}
if (insn != 0xe97f) {
/* Not an SG instruction first half (we choose the IMPDEF
* early-SG-check option).
*/
goto gen_invep;
}
if (!v7m_read_half_insn(cpu, mmu_idx, env->regs[15] + 2, &insn)) {
return false;
}
if (insn != 0xe97f) {
/* Not an SG instruction second half (yes, both halves of the SG
* insn have the same hex value)
*/
goto gen_invep;
}
/* OK, we have confirmed that we really have an SG instruction.
* We know we're NS in S memory so don't need to repeat those checks.
*/
qemu_log_mask(CPU_LOG_INT, "...really an SG instruction at 0x%08" PRIx32
", executing it\n", env->regs[15]);
env->regs[14] &= ~1;
switch_v7m_security_state(env, true);
xpsr_write(env, 0, XPSR_IT);
env->regs[15] += 4;
return true;
gen_invep:
env->v7m.sfsr |= R_V7M_SFSR_INVEP_MASK;
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_SECURE, false);
qemu_log_mask(CPU_LOG_INT,
"...really SecureFault with SFSR.INVEP\n");
return false;
}
void arm_v7m_cpu_do_interrupt(CPUState *cs)
{
ARMCPU *cpu = ARM_CPU(cs);
CPUARMState *env = &cpu->env;
uint32_t lr;
bool ignore_stackfaults;
arm_log_exception(cs->exception_index);
/* For exceptions we just mark as pending on the NVIC, and let that
handle it. */
switch (cs->exception_index) {
case EXCP_UDEF:
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE, env->v7m.secure);
env->v7m.cfsr[env->v7m.secure] |= R_V7M_CFSR_UNDEFINSTR_MASK;
break;
case EXCP_NOCP:
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE, env->v7m.secure);
env->v7m.cfsr[env->v7m.secure] |= R_V7M_CFSR_NOCP_MASK;
break;
case EXCP_INVSTATE:
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE, env->v7m.secure);
env->v7m.cfsr[env->v7m.secure] |= R_V7M_CFSR_INVSTATE_MASK;
break;
case EXCP_SWI:
/* The PC already points to the next instruction. */
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_SVC, env->v7m.secure);
break;
case EXCP_PREFETCH_ABORT:
case EXCP_DATA_ABORT:
/* Note that for M profile we don't have a guest facing FSR, but
* the env->exception.fsr will be populated by the code that
* raises the fault, in the A profile short-descriptor format.
*/
switch (env->exception.fsr & 0xf) {
case M_FAKE_FSR_NSC_EXEC:
/* Exception generated when we try to execute code at an address
* which is marked as Secure & Non-Secure Callable and the CPU
* is in the Non-Secure state. The only instruction which can
* be executed like this is SG (and that only if both halves of
* the SG instruction have the same security attributes.)
* Everything else must generate an INVEP SecureFault, so we
* emulate the SG instruction here.
*/
if (v7m_handle_execute_nsc(cpu)) {
return;
}
break;
case M_FAKE_FSR_SFAULT:
/* Various flavours of SecureFault for attempts to execute or
* access data in the wrong security state.
*/
switch (cs->exception_index) {
case EXCP_PREFETCH_ABORT:
if (env->v7m.secure) {
env->v7m.sfsr |= R_V7M_SFSR_INVTRAN_MASK;
qemu_log_mask(CPU_LOG_INT,
"...really SecureFault with SFSR.INVTRAN\n");
} else {
env->v7m.sfsr |= R_V7M_SFSR_INVEP_MASK;
qemu_log_mask(CPU_LOG_INT,
"...really SecureFault with SFSR.INVEP\n");
}
break;
case EXCP_DATA_ABORT:
/* This must be an NS access to S memory */
env->v7m.sfsr |= R_V7M_SFSR_AUVIOL_MASK;
qemu_log_mask(CPU_LOG_INT,
"...really SecureFault with SFSR.AUVIOL\n");
break;
}
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_SECURE, false);
break;
case 0x8: /* External Abort */
switch (cs->exception_index) {
case EXCP_PREFETCH_ABORT:
env->v7m.cfsr[M_REG_NS] |= R_V7M_CFSR_IBUSERR_MASK;
qemu_log_mask(CPU_LOG_INT, "...with CFSR.IBUSERR\n");
break;
case EXCP_DATA_ABORT:
env->v7m.cfsr[M_REG_NS] |=
(R_V7M_CFSR_PRECISERR_MASK | R_V7M_CFSR_BFARVALID_MASK);
env->v7m.bfar = env->exception.vaddress;
qemu_log_mask(CPU_LOG_INT,
"...with CFSR.PRECISERR and BFAR 0x%x\n",
env->v7m.bfar);
break;
}
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_BUS, false);
break;
default:
/* All other FSR values are either MPU faults or "can't happen
* for M profile" cases.
*/
switch (cs->exception_index) {
case EXCP_PREFETCH_ABORT:
env->v7m.cfsr[env->v7m.secure] |= R_V7M_CFSR_IACCVIOL_MASK;
qemu_log_mask(CPU_LOG_INT, "...with CFSR.IACCVIOL\n");
break;
case EXCP_DATA_ABORT:
env->v7m.cfsr[env->v7m.secure] |=
(R_V7M_CFSR_DACCVIOL_MASK | R_V7M_CFSR_MMARVALID_MASK);
env->v7m.mmfar[env->v7m.secure] = env->exception.vaddress;
qemu_log_mask(CPU_LOG_INT,
"...with CFSR.DACCVIOL and MMFAR 0x%x\n",
env->v7m.mmfar[env->v7m.secure]);
break;
}
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_MEM,
env->v7m.secure);
break;
}
break;
case EXCP_BKPT:
if (semihosting_enabled()) {
int nr;
nr = arm_lduw_code(env, env->regs[15], arm_sctlr_b(env)) & 0xff;
if (nr == 0xab) {
env->regs[15] += 2;
qemu_log_mask(CPU_LOG_INT,
"...handling as semihosting call 0x%x\n",
env->regs[0]);
env->regs[0] = do_arm_semihosting(env);
return;
}
}
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_DEBUG, false);
break;
case EXCP_IRQ:
break;
case EXCP_EXCEPTION_EXIT:
if (env->regs[15] < EXC_RETURN_MIN_MAGIC) {
/* Must be v8M security extension function return */
assert(env->regs[15] >= FNC_RETURN_MIN_MAGIC);
assert(arm_feature(env, ARM_FEATURE_M_SECURITY));
if (do_v7m_function_return(cpu)) {
return;
}
} else {
do_v7m_exception_exit(cpu);
return;
}
break;
default:
cpu_abort(cs, "Unhandled exception 0x%x\n", cs->exception_index);
return; /* Never happens. Keep compiler happy. */
}
if (arm_feature(env, ARM_FEATURE_V8)) {
lr = R_V7M_EXCRET_RES1_MASK |
R_V7M_EXCRET_DCRS_MASK |
R_V7M_EXCRET_FTYPE_MASK;
/* The S bit indicates whether we should return to Secure
* or NonSecure (ie our current state).
* The ES bit indicates whether we're taking this exception
* to Secure or NonSecure (ie our target state). We set it
* later, in v7m_exception_taken().
* The SPSEL bit is also set in v7m_exception_taken() for v8M.
* This corresponds to the ARM ARM pseudocode for v8M setting
* some LR bits in PushStack() and some in ExceptionTaken();
* the distinction matters for the tailchain cases where we
* can take an exception without pushing the stack.
*/
if (env->v7m.secure) {
lr |= R_V7M_EXCRET_S_MASK;
}
} else {
lr = R_V7M_EXCRET_RES1_MASK |
R_V7M_EXCRET_S_MASK |
R_V7M_EXCRET_DCRS_MASK |
R_V7M_EXCRET_FTYPE_MASK |
R_V7M_EXCRET_ES_MASK;
if (env->v7m.control[M_REG_NS] & R_V7M_CONTROL_SPSEL_MASK) {
lr |= R_V7M_EXCRET_SPSEL_MASK;
}
}
if (!arm_v7m_is_handler_mode(env)) {
lr |= R_V7M_EXCRET_MODE_MASK;
}
ignore_stackfaults = v7m_push_stack(cpu);
v7m_exception_taken(cpu, lr, false, ignore_stackfaults);
qemu_log_mask(CPU_LOG_INT, "... as %d\n", env->v7m.exception);
}
/* Function used to synchronize QEMU's AArch64 register set with AArch32
* register set. This is necessary when switching between AArch32 and AArch64
* execution state.
*/
void aarch64_sync_32_to_64(CPUARMState *env)
{
int i;
uint32_t mode = env->uncached_cpsr & CPSR_M;
/* We can blanket copy R[0:7] to X[0:7] */
for (i = 0; i < 8; i++) {
env->xregs[i] = env->regs[i];
}
/* Unless we are in FIQ mode, x8-x12 come from the user registers r8-r12.
* Otherwise, they come from the banked user regs.
*/
if (mode == ARM_CPU_MODE_FIQ) {
for (i = 8; i < 13; i++) {
env->xregs[i] = env->usr_regs[i - 8];
}
} else {
for (i = 8; i < 13; i++) {
env->xregs[i] = env->regs[i];
}
}
/* Registers x13-x23 are the various mode SP and FP registers. Registers
* r13 and r14 are only copied if we are in that mode, otherwise we copy
* from the mode banked register.
*/
if (mode == ARM_CPU_MODE_USR || mode == ARM_CPU_MODE_SYS) {
env->xregs[13] = env->regs[13];
env->xregs[14] = env->regs[14];
} else {
env->xregs[13] = env->banked_r13[bank_number(ARM_CPU_MODE_USR)];
/* HYP is an exception in that it is copied from r14 */
if (mode == ARM_CPU_MODE_HYP) {
env->xregs[14] = env->regs[14];
} else {
env->xregs[14] = env->banked_r14[bank_number(ARM_CPU_MODE_USR)];
}
}
if (mode == ARM_CPU_MODE_HYP) {
env->xregs[15] = env->regs[13];
} else {
env->xregs[15] = env->banked_r13[bank_number(ARM_CPU_MODE_HYP)];
}
if (mode == ARM_CPU_MODE_IRQ) {
env->xregs[16] = env->regs[14];
env->xregs[17] = env->regs[13];
} else {
env->xregs[16] = env->banked_r14[bank_number(ARM_CPU_MODE_IRQ)];
env->xregs[17] = env->banked_r13[bank_number(ARM_CPU_MODE_IRQ)];
}
if (mode == ARM_CPU_MODE_SVC) {
env->xregs[18] = env->regs[14];
env->xregs[19] = env->regs[13];
} else {
env->xregs[18] = env->banked_r14[bank_number(ARM_CPU_MODE_SVC)];
env->xregs[19] = env->banked_r13[bank_number(ARM_CPU_MODE_SVC)];
}
if (mode == ARM_CPU_MODE_ABT) {
env->xregs[20] = env->regs[14];
env->xregs[21] = env->regs[13];
} else {
env->xregs[20] = env->banked_r14[bank_number(ARM_CPU_MODE_ABT)];
env->xregs[21] = env->banked_r13[bank_number(ARM_CPU_MODE_ABT)];
}
if (mode == ARM_CPU_MODE_UND) {
env->xregs[22] = env->regs[14];
env->xregs[23] = env->regs[13];
} else {
env->xregs[22] = env->banked_r14[bank_number(ARM_CPU_MODE_UND)];
env->xregs[23] = env->banked_r13[bank_number(ARM_CPU_MODE_UND)];
}
/* Registers x24-x30 are mapped to r8-r14 in FIQ mode. If we are in FIQ
* mode, then we can copy from r8-r14. Otherwise, we copy from the
* FIQ bank for r8-r14.
*/
if (mode == ARM_CPU_MODE_FIQ) {
for (i = 24; i < 31; i++) {
env->xregs[i] = env->regs[i - 16]; /* X[24:30] <- R[8:14] */
}
} else {
for (i = 24; i < 29; i++) {
env->xregs[i] = env->fiq_regs[i - 24];
}
env->xregs[29] = env->banked_r13[bank_number(ARM_CPU_MODE_FIQ)];
env->xregs[30] = env->banked_r14[bank_number(ARM_CPU_MODE_FIQ)];
}
env->pc = env->regs[15];
}
/* Function used to synchronize QEMU's AArch32 register set with AArch64
* register set. This is necessary when switching between AArch32 and AArch64
* execution state.
*/
void aarch64_sync_64_to_32(CPUARMState *env)
{
int i;
uint32_t mode = env->uncached_cpsr & CPSR_M;
/* We can blanket copy X[0:7] to R[0:7] */
for (i = 0; i < 8; i++) {
env->regs[i] = env->xregs[i];
}
/* Unless we are in FIQ mode, r8-r12 come from the user registers x8-x12.
* Otherwise, we copy x8-x12 into the banked user regs.
*/
if (mode == ARM_CPU_MODE_FIQ) {
for (i = 8; i < 13; i++) {
env->usr_regs[i - 8] = env->xregs[i];
}
} else {
for (i = 8; i < 13; i++) {
env->regs[i] = env->xregs[i];
}
}
/* Registers r13 & r14 depend on the current mode.
* If we are in a given mode, we copy the corresponding x registers to r13
* and r14. Otherwise, we copy the x register to the banked r13 and r14
* for the mode.
*/
if (mode == ARM_CPU_MODE_USR || mode == ARM_CPU_MODE_SYS) {
env->regs[13] = env->xregs[13];
env->regs[14] = env->xregs[14];
} else {
env->banked_r13[bank_number(ARM_CPU_MODE_USR)] = env->xregs[13];
/* HYP is an exception in that it does not have its own banked r14 but
* shares the USR r14
*/
if (mode == ARM_CPU_MODE_HYP) {
env->regs[14] = env->xregs[14];
} else {
env->banked_r14[bank_number(ARM_CPU_MODE_USR)] = env->xregs[14];
}
}
if (mode == ARM_CPU_MODE_HYP) {
env->regs[13] = env->xregs[15];
} else {
env->banked_r13[bank_number(ARM_CPU_MODE_HYP)] = env->xregs[15];
}
if (mode == ARM_CPU_MODE_IRQ) {
env->regs[14] = env->xregs[16];
env->regs[13] = env->xregs[17];
} else {
env->banked_r14[bank_number(ARM_CPU_MODE_IRQ)] = env->xregs[16];
env->banked_r13[bank_number(ARM_CPU_MODE_IRQ)] = env->xregs[17];
}
if (mode == ARM_CPU_MODE_SVC) {
env->regs[14] = env->xregs[18];
env->regs[13] = env->xregs[19];
} else {
env->banked_r14[bank_number(ARM_CPU_MODE_SVC)] = env->xregs[18];
env->banked_r13[bank_number(ARM_CPU_MODE_SVC)] = env->xregs[19];
}
if (mode == ARM_CPU_MODE_ABT) {
env->regs[14] = env->xregs[20];
env->regs[13] = env->xregs[21];
} else {
env->banked_r14[bank_number(ARM_CPU_MODE_ABT)] = env->xregs[20];
env->banked_r13[bank_number(ARM_CPU_MODE_ABT)] = env->xregs[21];
}
if (mode == ARM_CPU_MODE_UND) {
env->regs[14] = env->xregs[22];
env->regs[13] = env->xregs[23];
} else {
env->banked_r14[bank_number(ARM_CPU_MODE_UND)] = env->xregs[22];
env->banked_r13[bank_number(ARM_CPU_MODE_UND)] = env->xregs[23];
}
/* Registers x24-x30 are mapped to r8-r14 in FIQ mode. If we are in FIQ
* mode, then we can copy to r8-r14. Otherwise, we copy to the
* FIQ bank for r8-r14.
*/
if (mode == ARM_CPU_MODE_FIQ) {
for (i = 24; i < 31; i++) {
env->regs[i - 16] = env->xregs[i]; /* X[24:30] -> R[8:14] */
}
} else {
for (i = 24; i < 29; i++) {
env->fiq_regs[i - 24] = env->xregs[i];
}
env->banked_r13[bank_number(ARM_CPU_MODE_FIQ)] = env->xregs[29];
env->banked_r14[bank_number(ARM_CPU_MODE_FIQ)] = env->xregs[30];
}
env->regs[15] = env->pc;
}
static void arm_cpu_do_interrupt_aarch32(CPUState *cs)
{
ARMCPU *cpu = ARM_CPU(cs);
CPUARMState *env = &cpu->env;
uint32_t addr;
uint32_t mask;
int new_mode;
uint32_t offset;
uint32_t moe;
/* If this is a debug exception we must update the DBGDSCR.MOE bits */
switch (env->exception.syndrome >> ARM_EL_EC_SHIFT) {
case EC_BREAKPOINT:
case EC_BREAKPOINT_SAME_EL:
moe = 1;
break;
case EC_WATCHPOINT:
case EC_WATCHPOINT_SAME_EL:
moe = 10;
break;
case EC_AA32_BKPT:
moe = 3;
break;
case EC_VECTORCATCH:
moe = 5;
break;
default:
moe = 0;
break;
}
if (moe) {
env->cp15.mdscr_el1 = deposit64(env->cp15.mdscr_el1, 2, 4, moe);
}
/* TODO: Vectored interrupt controller. */
switch (cs->exception_index) {
case EXCP_UDEF:
new_mode = ARM_CPU_MODE_UND;
addr = 0x04;
mask = CPSR_I;
if (env->thumb)
offset = 2;
else
offset = 4;
break;
case EXCP_SWI:
new_mode = ARM_CPU_MODE_SVC;
addr = 0x08;
mask = CPSR_I;
/* The PC already points to the next instruction. */
offset = 0;
break;
case EXCP_BKPT:
/* Fall through to prefetch abort. */
case EXCP_PREFETCH_ABORT:
A32_BANKED_CURRENT_REG_SET(env, ifsr, env->exception.fsr);
A32_BANKED_CURRENT_REG_SET(env, ifar, env->exception.vaddress);
qemu_log_mask(CPU_LOG_INT, "...with IFSR 0x%x IFAR 0x%x\n",
env->exception.fsr, (uint32_t)env->exception.vaddress);
new_mode = ARM_CPU_MODE_ABT;
addr = 0x0c;
mask = CPSR_A | CPSR_I;
offset = 4;
break;
case EXCP_DATA_ABORT:
A32_BANKED_CURRENT_REG_SET(env, dfsr, env->exception.fsr);
A32_BANKED_CURRENT_REG_SET(env, dfar, env->exception.vaddress);
qemu_log_mask(CPU_LOG_INT, "...with DFSR 0x%x DFAR 0x%x\n",
env->exception.fsr,
(uint32_t)env->exception.vaddress);
new_mode = ARM_CPU_MODE_ABT;
addr = 0x10;
mask = CPSR_A | CPSR_I;
offset = 8;
break;
case EXCP_IRQ:
new_mode = ARM_CPU_MODE_IRQ;
addr = 0x18;
/* Disable IRQ and imprecise data aborts. */
mask = CPSR_A | CPSR_I;
offset = 4;
if (env->cp15.scr_el3 & SCR_IRQ) {
/* IRQ routed to monitor mode */
new_mode = ARM_CPU_MODE_MON;
mask |= CPSR_F;
}
break;
case EXCP_FIQ:
new_mode = ARM_CPU_MODE_FIQ;
addr = 0x1c;
/* Disable FIQ, IRQ and imprecise data aborts. */
mask = CPSR_A | CPSR_I | CPSR_F;
if (env->cp15.scr_el3 & SCR_FIQ) {
/* FIQ routed to monitor mode */
new_mode = ARM_CPU_MODE_MON;
}
offset = 4;
break;
case EXCP_VIRQ:
new_mode = ARM_CPU_MODE_IRQ;
addr = 0x18;
/* Disable IRQ and imprecise data aborts. */
mask = CPSR_A | CPSR_I;
offset = 4;
break;
case EXCP_VFIQ:
new_mode = ARM_CPU_MODE_FIQ;
addr = 0x1c;
/* Disable FIQ, IRQ and imprecise data aborts. */
mask = CPSR_A | CPSR_I | CPSR_F;
offset = 4;
break;
case EXCP_SMC:
new_mode = ARM_CPU_MODE_MON;
addr = 0x08;
mask = CPSR_A | CPSR_I | CPSR_F;
offset = 0;
break;
default:
cpu_abort(cs, "Unhandled exception 0x%x\n", cs->exception_index);
return; /* Never happens. Keep compiler happy. */
}
if (new_mode == ARM_CPU_MODE_MON) {
addr += env->cp15.mvbar;
} else if (A32_BANKED_CURRENT_REG_GET(env, sctlr) & SCTLR_V) {
/* High vectors. When enabled, base address cannot be remapped. */
addr += 0xffff0000;
} else {
/* ARM v7 architectures provide a vector base address register to remap
* the interrupt vector table.
* This register is only followed in non-monitor mode, and is banked.
* Note: only bits 31:5 are valid.
*/
addr += A32_BANKED_CURRENT_REG_GET(env, vbar);
}
if ((env->uncached_cpsr & CPSR_M) == ARM_CPU_MODE_MON) {
env->cp15.scr_el3 &= ~SCR_NS;
}
switch_mode (env, new_mode);
/* For exceptions taken to AArch32 we must clear the SS bit in both
* PSTATE and in the old-state value we save to SPSR_<mode>, so zero it now.
*/
env->uncached_cpsr &= ~PSTATE_SS;
env->spsr = cpsr_read(env);
/* Clear IT bits. */
env->condexec_bits = 0;
/* Switch to the new mode, and to the correct instruction set. */
env->uncached_cpsr = (env->uncached_cpsr & ~CPSR_M) | new_mode;
/* Set new mode endianness */
env->uncached_cpsr &= ~CPSR_E;
if (env->cp15.sctlr_el[arm_current_el(env)] & SCTLR_EE) {
env->uncached_cpsr |= CPSR_E;
}
env->daif |= mask;
/* this is a lie, as the was no c1_sys on V4T/V5, but who cares
* and we should just guard the thumb mode on V4 */
if (arm_feature(env, ARM_FEATURE_V4T)) {
env->thumb = (A32_BANKED_CURRENT_REG_GET(env, sctlr) & SCTLR_TE) != 0;
}
env->regs[14] = env->regs[15] + offset;
env->regs[15] = addr;
}
/* Handle exception entry to a target EL which is using AArch64 */
static void arm_cpu_do_interrupt_aarch64(CPUState *cs)
{
ARMCPU *cpu = ARM_CPU(cs);
CPUARMState *env = &cpu->env;
unsigned int new_el = env->exception.target_el;
target_ulong addr = env->cp15.vbar_el[new_el];
unsigned int new_mode = aarch64_pstate_mode(new_el, true);
if (arm_current_el(env) < new_el) {
/* Entry vector offset depends on whether the implemented EL
* immediately lower than the target level is using AArch32 or AArch64
*/
bool is_aa64;
switch (new_el) {
case 3:
is_aa64 = (env->cp15.scr_el3 & SCR_RW) != 0;
break;
case 2:
is_aa64 = (env->cp15.hcr_el2 & HCR_RW) != 0;
break;
case 1:
is_aa64 = is_a64(env);
break;
default:
g_assert_not_reached();
}
if (is_aa64) {
addr += 0x400;
} else {
addr += 0x600;
}
} else if (pstate_read(env) & PSTATE_SP) {
addr += 0x200;
}
switch (cs->exception_index) {
case EXCP_PREFETCH_ABORT:
case EXCP_DATA_ABORT:
env->cp15.far_el[new_el] = env->exception.vaddress;
qemu_log_mask(CPU_LOG_INT, "...with FAR 0x%" PRIx64 "\n",
env->cp15.far_el[new_el]);
/* fall through */
case EXCP_BKPT:
case EXCP_UDEF:
case EXCP_SWI:
case EXCP_HVC:
case EXCP_HYP_TRAP:
case EXCP_SMC:
env->cp15.esr_el[new_el] = env->exception.syndrome;
break;
case EXCP_IRQ:
case EXCP_VIRQ:
addr += 0x80;
break;
case EXCP_FIQ:
case EXCP_VFIQ:
addr += 0x100;
break;
case EXCP_SEMIHOST:
qemu_log_mask(CPU_LOG_INT,
"...handling as semihosting call 0x%" PRIx64 "\n",
env->xregs[0]);
env->xregs[0] = do_arm_semihosting(env);
return;
default:
cpu_abort(cs, "Unhandled exception 0x%x\n", cs->exception_index);
}
if (is_a64(env)) {
env->banked_spsr[aarch64_banked_spsr_index(new_el)] = pstate_read(env);
aarch64_save_sp(env, arm_current_el(env));
env->elr_el[new_el] = env->pc;
} else {
env->banked_spsr[aarch64_banked_spsr_index(new_el)] = cpsr_read(env);
env->elr_el[new_el] = env->regs[15];
aarch64_sync_32_to_64(env);
env->condexec_bits = 0;
}
qemu_log_mask(CPU_LOG_INT, "...with ELR 0x%" PRIx64 "\n",
env->elr_el[new_el]);
pstate_write(env, PSTATE_DAIF | new_mode);
env->aarch64 = 1;
aarch64_restore_sp(env, new_el);
env->pc = addr;
qemu_log_mask(CPU_LOG_INT, "...to EL%d PC 0x%" PRIx64 " PSTATE 0x%x\n",
new_el, env->pc, pstate_read(env));
}
static inline bool check_for_semihosting(CPUState *cs)
{
/* Check whether this exception is a semihosting call; if so
* then handle it and return true; otherwise return false.
*/
ARMCPU *cpu = ARM_CPU(cs);
CPUARMState *env = &cpu->env;
if (is_a64(env)) {
if (cs->exception_index == EXCP_SEMIHOST) {
/* This is always the 64-bit semihosting exception.
* The "is this usermode" and "is semihosting enabled"
* checks have been done at translate time.
*/
qemu_log_mask(CPU_LOG_INT,
"...handling as semihosting call 0x%" PRIx64 "\n",
env->xregs[0]);
env->xregs[0] = do_arm_semihosting(env);
return true;
}
return false;
} else {
uint32_t imm;
/* Only intercept calls from privileged modes, to provide some
* semblance of security.
*/
if (cs->exception_index != EXCP_SEMIHOST &&
(!semihosting_enabled() ||
((env->uncached_cpsr & CPSR_M) == ARM_CPU_MODE_USR))) {
return false;
}
switch (cs->exception_index) {
case EXCP_SEMIHOST:
/* This is always a semihosting call; the "is this usermode"
* and "is semihosting enabled" checks have been done at
* translate time.
*/
break;
case EXCP_SWI:
/* Check for semihosting interrupt. */
if (env->thumb) {
imm = arm_lduw_code(env, env->regs[15] - 2, arm_sctlr_b(env))
& 0xff;
if (imm == 0xab) {
break;
}
} else {
imm = arm_ldl_code(env, env->regs[15] - 4, arm_sctlr_b(env))
& 0xffffff;
if (imm == 0x123456) {
break;
}
}
return false;
case EXCP_BKPT:
/* See if this is a semihosting syscall. */
if (env->thumb) {
imm = arm_lduw_code(env, env->regs[15], arm_sctlr_b(env))
& 0xff;
if (imm == 0xab) {
env->regs[15] += 2;
break;
}
}
return false;
default:
return false;
}
qemu_log_mask(CPU_LOG_INT,
"...handling as semihosting call 0x%x\n",
env->regs[0]);
env->regs[0] = do_arm_semihosting(env);
return true;
}
}
/* Handle a CPU exception for A and R profile CPUs.
* Do any appropriate logging, handle PSCI calls, and then hand off
* to the AArch64-entry or AArch32-entry function depending on the
* target exception level's register width.
*/
void arm_cpu_do_interrupt(CPUState *cs)
{
ARMCPU *cpu = ARM_CPU(cs);
CPUARMState *env = &cpu->env;
unsigned int new_el = env->exception.target_el;
assert(!arm_feature(env, ARM_FEATURE_M));
arm_log_exception(cs->exception_index);
qemu_log_mask(CPU_LOG_INT, "...from EL%d to EL%d\n", arm_current_el(env),
new_el);
if (qemu_loglevel_mask(CPU_LOG_INT)
&& !excp_is_internal(cs->exception_index)) {
qemu_log_mask(CPU_LOG_INT, "...with ESR 0x%x/0x%" PRIx32 "\n",
env->exception.syndrome >> ARM_EL_EC_SHIFT,
env->exception.syndrome);
}
if (arm_is_psci_call(cpu, cs->exception_index)) {
arm_handle_psci_call(cpu);
qemu_log_mask(CPU_LOG_INT, "...handled as PSCI call\n");
return;
}
/* Semihosting semantics depend on the register width of the
* code that caused the exception, not the target exception level,
* so must be handled here.
*/
if (check_for_semihosting(cs)) {
return;
}
/* Hooks may change global state so BQL should be held, also the
* BQL needs to be held for any modification of
* cs->interrupt_request.
*/
g_assert(qemu_mutex_iothread_locked());
arm_call_pre_el_change_hook(cpu);
assert(!excp_is_internal(cs->exception_index));
if (arm_el_is_aa64(env, new_el)) {
arm_cpu_do_interrupt_aarch64(cs);
} else {
arm_cpu_do_interrupt_aarch32(cs);
}
arm_call_el_change_hook(cpu);
if (!kvm_enabled()) {
cs->interrupt_request |= CPU_INTERRUPT_EXITTB;
}
}
/* Return the exception level which controls this address translation regime */
static inline uint32_t regime_el(CPUARMState *env, ARMMMUIdx mmu_idx)
{
switch (mmu_idx) {
case ARMMMUIdx_S2NS:
case ARMMMUIdx_S1E2:
return 2;
case ARMMMUIdx_S1E3:
return 3;
case ARMMMUIdx_S1SE0:
return arm_el_is_aa64(env, 3) ? 1 : 3;
case ARMMMUIdx_S1SE1:
case ARMMMUIdx_S1NSE0:
case ARMMMUIdx_S1NSE1:
case ARMMMUIdx_MPrivNegPri:
case ARMMMUIdx_MUserNegPri:
case ARMMMUIdx_MPriv:
case ARMMMUIdx_MUser:
case ARMMMUIdx_MSPrivNegPri:
case ARMMMUIdx_MSUserNegPri:
case ARMMMUIdx_MSPriv:
case ARMMMUIdx_MSUser:
return 1;
default:
g_assert_not_reached();
}
}
/* Return the SCTLR value which controls this address translation regime */
static inline uint32_t regime_sctlr(CPUARMState *env, ARMMMUIdx mmu_idx)
{
return env->cp15.sctlr_el[regime_el(env, mmu_idx)];
}
/* Return true if the specified stage of address translation is disabled */
static inline bool regime_translation_disabled(CPUARMState *env,
ARMMMUIdx mmu_idx)
{
if (arm_feature(env, ARM_FEATURE_M)) {
switch (env->v7m.mpu_ctrl[regime_is_secure(env, mmu_idx)] &
(R_V7M_MPU_CTRL_ENABLE_MASK | R_V7M_MPU_CTRL_HFNMIENA_MASK)) {
case R_V7M_MPU_CTRL_ENABLE_MASK:
/* Enabled, but not for HardFault and NMI */
return mmu_idx & ARM_MMU_IDX_M_NEGPRI;
case R_V7M_MPU_CTRL_ENABLE_MASK | R_V7M_MPU_CTRL_HFNMIENA_MASK:
/* Enabled for all cases */
return false;
case 0:
default:
/* HFNMIENA set and ENABLE clear is UNPREDICTABLE, but
* we warned about that in armv7m_nvic.c when the guest set it.
*/
return true;
}
}
if (mmu_idx == ARMMMUIdx_S2NS) {
return (env->cp15.hcr_el2 & HCR_VM) == 0;
}
return (regime_sctlr(env, mmu_idx) & SCTLR_M) == 0;
}
static inline bool regime_translation_big_endian(CPUARMState *env,
ARMMMUIdx mmu_idx)
{
return (regime_sctlr(env, mmu_idx) & SCTLR_EE) != 0;
}
/* Return the TCR controlling this translation regime */
static inline TCR *regime_tcr(CPUARMState *env, ARMMMUIdx mmu_idx)
{
if (mmu_idx == ARMMMUIdx_S2NS) {
return &env->cp15.vtcr_el2;
}
return &env->cp15.tcr_el[regime_el(env, mmu_idx)];
}
/* Convert a possible stage1+2 MMU index into the appropriate
* stage 1 MMU index
*/
static inline ARMMMUIdx stage_1_mmu_idx(ARMMMUIdx mmu_idx)
{
if (mmu_idx == ARMMMUIdx_S12NSE0 || mmu_idx == ARMMMUIdx_S12NSE1) {
mmu_idx += (ARMMMUIdx_S1NSE0 - ARMMMUIdx_S12NSE0);
}
return mmu_idx;
}
/* Returns TBI0 value for current regime el */
uint32_t arm_regime_tbi0(CPUARMState *env, ARMMMUIdx mmu_idx)
{
TCR *tcr;
uint32_t el;
/* For EL0 and EL1, TBI is controlled by stage 1's TCR, so convert
* a stage 1+2 mmu index into the appropriate stage 1 mmu index.
*/
mmu_idx = stage_1_mmu_idx(mmu_idx);
tcr = regime_tcr(env, mmu_idx);
el = regime_el(env, mmu_idx);
if (el > 1) {
return extract64(tcr->raw_tcr, 20, 1);
} else {
return extract64(tcr->raw_tcr, 37, 1);
}
}
/* Returns TBI1 value for current regime el */
uint32_t arm_regime_tbi1(CPUARMState *env, ARMMMUIdx mmu_idx)
{
TCR *tcr;
uint32_t el;
/* For EL0 and EL1, TBI is controlled by stage 1's TCR, so convert
* a stage 1+2 mmu index into the appropriate stage 1 mmu index.
*/
mmu_idx = stage_1_mmu_idx(mmu_idx);
tcr = regime_tcr(env, mmu_idx);
el = regime_el(env, mmu_idx);
if (el > 1) {
return 0;
} else {
return extract64(tcr->raw_tcr, 38, 1);
}
}
/* Return the TTBR associated with this translation regime */
static inline uint64_t regime_ttbr(CPUARMState *env, ARMMMUIdx mmu_idx,
int ttbrn)
{
if (mmu_idx == ARMMMUIdx_S2NS) {
return env->cp15.vttbr_el2;
}
if (ttbrn == 0) {
return env->cp15.ttbr0_el[regime_el(env, mmu_idx)];
} else {
return env->cp15.ttbr1_el[regime_el(env, mmu_idx)];
}
}
/* Return true if the translation regime is using LPAE format page tables */
static inline bool regime_using_lpae_format(CPUARMState *env,
ARMMMUIdx mmu_idx)
{
int el = regime_el(env, mmu_idx);
if (el == 2 || arm_el_is_aa64(env, el)) {
return true;
}
if (arm_feature(env, ARM_FEATURE_LPAE)
&& (regime_tcr(env, mmu_idx)->raw_tcr & TTBCR_EAE)) {
return true;
}
return false;
}
/* Returns true if the stage 1 translation regime is using LPAE format page
* tables. Used when raising alignment exceptions, whose FSR changes depending
* on whether the long or short descriptor format is in use. */
bool arm_s1_regime_using_lpae_format(CPUARMState *env, ARMMMUIdx mmu_idx)
{
mmu_idx = stage_1_mmu_idx(mmu_idx);
return regime_using_lpae_format(env, mmu_idx);
}
static inline bool regime_is_user(CPUARMState *env, ARMMMUIdx mmu_idx)
{
switch (mmu_idx) {
case ARMMMUIdx_S1SE0:
case ARMMMUIdx_S1NSE0:
case ARMMMUIdx_MUser:
case ARMMMUIdx_MSUser:
case ARMMMUIdx_MUserNegPri:
case ARMMMUIdx_MSUserNegPri:
return true;
default:
return false;
case ARMMMUIdx_S12NSE0:
case ARMMMUIdx_S12NSE1:
g_assert_not_reached();
}
}
/* Translate section/page access permissions to page
* R/W protection flags
*
* @env: CPUARMState
* @mmu_idx: MMU index indicating required translation regime
* @ap: The 3-bit access permissions (AP[2:0])
* @domain_prot: The 2-bit domain access permissions
*/
static inline int ap_to_rw_prot(CPUARMState *env, ARMMMUIdx mmu_idx,
int ap, int domain_prot)
{
bool is_user = regime_is_user(env, mmu_idx);
if (domain_prot == 3) {
return PAGE_READ | PAGE_WRITE;
}
switch (ap) {
case 0:
if (arm_feature(env, ARM_FEATURE_V7)) {
return 0;
}
switch (regime_sctlr(env, mmu_idx) & (SCTLR_S | SCTLR_R)) {
case SCTLR_S:
return is_user ? 0 : PAGE_READ;
case SCTLR_R:
return PAGE_READ;
default:
return 0;
}
case 1:
return is_user ? 0 : PAGE_READ | PAGE_WRITE;
case 2:
if (is_user) {
return PAGE_READ;
} else {
return PAGE_READ | PAGE_WRITE;
}
case 3:
return PAGE_READ | PAGE_WRITE;
case 4: /* Reserved. */
return 0;
case 5:
return is_user ? 0 : PAGE_READ;
case 6:
return PAGE_READ;
case 7:
if (!arm_feature(env, ARM_FEATURE_V6K)) {
return 0;
}
return PAGE_READ;
default:
g_assert_not_reached();
}
}
/* Translate section/page access permissions to page
* R/W protection flags.
*
* @ap: The 2-bit simple AP (AP[2:1])
* @is_user: TRUE if accessing from PL0
*/
static inline int simple_ap_to_rw_prot_is_user(int ap, bool is_user)
{
switch (ap) {
case 0:
return is_user ? 0 : PAGE_READ | PAGE_WRITE;
case 1:
return PAGE_READ | PAGE_WRITE;
case 2:
return is_user ? 0 : PAGE_READ;
case 3:
return PAGE_READ;
default:
g_assert_not_reached();
}
}
static inline int
simple_ap_to_rw_prot(CPUARMState *env, ARMMMUIdx mmu_idx, int ap)
{
return simple_ap_to_rw_prot_is_user(ap, regime_is_user(env, mmu_idx));
}
/* Translate S2 section/page access permissions to protection flags
*
* @env: CPUARMState
* @s2ap: The 2-bit stage2 access permissions (S2AP)
* @xn: XN (execute-never) bit
*/
static int get_S2prot(CPUARMState *env, int s2ap, int xn)
{
int prot = 0;
if (s2ap & 1) {
prot |= PAGE_READ;
}
if (s2ap & 2) {
prot |= PAGE_WRITE;
}
if (!xn) {
if (arm_el_is_aa64(env, 2) || prot & PAGE_READ) {
prot |= PAGE_EXEC;
}
}
return prot;
}
/* Translate section/page access permissions to protection flags
*
* @env: CPUARMState
* @mmu_idx: MMU index indicating required translation regime
* @is_aa64: TRUE if AArch64
* @ap: The 2-bit simple AP (AP[2:1])
* @ns: NS (non-secure) bit
* @xn: XN (execute-never) bit
* @pxn: PXN (privileged execute-never) bit
*/
static int get_S1prot(CPUARMState *env, ARMMMUIdx mmu_idx, bool is_aa64,
int ap, int ns, int xn, int pxn)
{
bool is_user = regime_is_user(env, mmu_idx);
int prot_rw, user_rw;
bool have_wxn;
int wxn = 0;
assert(mmu_idx != ARMMMUIdx_S2NS);
user_rw = simple_ap_to_rw_prot_is_user(ap, true);
if (is_user) {
prot_rw = user_rw;
} else {
prot_rw = simple_ap_to_rw_prot_is_user(ap, false);
}
if (ns && arm_is_secure(env) && (env->cp15.scr_el3 & SCR_SIF)) {
return prot_rw;
}
/* TODO have_wxn should be replaced with
* ARM_FEATURE_V8 || (ARM_FEATURE_V7 && ARM_FEATURE_EL2)
* when ARM_FEATURE_EL2 starts getting set. For now we assume all LPAE
* compatible processors have EL2, which is required for [U]WXN.
*/
have_wxn = arm_feature(env, ARM_FEATURE_LPAE);
if (have_wxn) {
wxn = regime_sctlr(env, mmu_idx) & SCTLR_WXN;
}
if (is_aa64) {
switch (regime_el(env, mmu_idx)) {
case 1:
if (!is_user) {
xn = pxn || (user_rw & PAGE_WRITE);
}
break;
case 2:
case 3:
break;
}
} else if (arm_feature(env, ARM_FEATURE_V7)) {
switch (regime_el(env, mmu_idx)) {
case 1:
case 3:
if (is_user) {
xn = xn || !(user_rw & PAGE_READ);
} else {
int uwxn = 0;
if (have_wxn) {
uwxn = regime_sctlr(env, mmu_idx) & SCTLR_UWXN;
}
xn = xn || !(prot_rw & PAGE_READ) || pxn ||
(uwxn && (user_rw & PAGE_WRITE));
}
break;
case 2:
break;
}
} else {
xn = wxn = 0;
}
if (xn || (wxn && (prot_rw & PAGE_WRITE))) {
return prot_rw;
}
return prot_rw | PAGE_EXEC;
}
static bool get_level1_table_address(CPUARMState *env, ARMMMUIdx mmu_idx,
uint32_t *table, uint32_t address)
{
/* Note that we can only get here for an AArch32 PL0/PL1 lookup */
TCR *tcr = regime_tcr(env, mmu_idx);
if (address & tcr->mask) {
if (tcr->raw_tcr & TTBCR_PD1) {
/* Translation table walk disabled for TTBR1 */
return false;
}
*table = regime_ttbr(env, mmu_idx, 1) & 0xffffc000;
} else {
if (tcr->raw_tcr & TTBCR_PD0) {
/* Translation table walk disabled for TTBR0 */
return false;
}
*table = regime_ttbr(env, mmu_idx, 0) & tcr->base_mask;
}
*table |= (address >> 18) & 0x3ffc;
return true;
}
/* Translate a S1 pagetable walk through S2 if needed. */
static hwaddr S1_ptw_translate(CPUARMState *env, ARMMMUIdx mmu_idx,
hwaddr addr, MemTxAttrs txattrs,
ARMMMUFaultInfo *fi)
{
if ((mmu_idx == ARMMMUIdx_S1NSE0 || mmu_idx == ARMMMUIdx_S1NSE1) &&
!regime_translation_disabled(env, ARMMMUIdx_S2NS)) {
target_ulong s2size;
hwaddr s2pa;
int s2prot;
int ret;
ret = get_phys_addr_lpae(env, addr, 0, ARMMMUIdx_S2NS, &s2pa,
&txattrs, &s2prot, &s2size, fi, NULL);
if (ret) {
assert(fi->type != ARMFault_None);
fi->s2addr = addr;
fi->stage2 = true;
fi->s1ptw = true;
return ~0;
}
addr = s2pa;
}
return addr;
}
/* All loads done in the course of a page table walk go through here. */
static uint32_t arm_ldl_ptw(CPUState *cs, hwaddr addr, bool is_secure,
ARMMMUIdx mmu_idx, ARMMMUFaultInfo *fi)
{
ARMCPU *cpu = ARM_CPU(cs);
CPUARMState *env = &cpu->env;
MemTxAttrs attrs = {};
MemTxResult result = MEMTX_OK;
AddressSpace *as;
uint32_t data;
attrs.secure = is_secure;
as = arm_addressspace(cs, attrs);
addr = S1_ptw_translate(env, mmu_idx, addr, attrs, fi);
if (fi->s1ptw) {
return 0;
}
if (regime_translation_big_endian(env, mmu_idx)) {
data = address_space_ldl_be(as, addr, attrs, &result);
} else {
data = address_space_ldl_le(as, addr, attrs, &result);
}
if (result == MEMTX_OK) {
return data;
}
fi->type = ARMFault_SyncExternalOnWalk;
fi->ea = arm_extabort_type(result);
return 0;
}
static uint64_t arm_ldq_ptw(CPUState *cs, hwaddr addr, bool is_secure,
ARMMMUIdx mmu_idx, ARMMMUFaultInfo *fi)
{
ARMCPU *cpu = ARM_CPU(cs);
CPUARMState *env = &cpu->env;
MemTxAttrs attrs = {};
MemTxResult result = MEMTX_OK;
AddressSpace *as;
uint64_t data;
attrs.secure = is_secure;
as = arm_addressspace(cs, attrs);
addr = S1_ptw_translate(env, mmu_idx, addr, attrs, fi);
if (fi->s1ptw) {
return 0;
}
if (regime_translation_big_endian(env, mmu_idx)) {
data = address_space_ldq_be(as, addr, attrs, &result);
} else {
data = address_space_ldq_le(as, addr, attrs, &result);
}
if (result == MEMTX_OK) {
return data;
}
fi->type = ARMFault_SyncExternalOnWalk;
fi->ea = arm_extabort_type(result);
return 0;
}
static bool get_phys_addr_v5(CPUARMState *env, uint32_t address,
MMUAccessType access_type, ARMMMUIdx mmu_idx,
hwaddr *phys_ptr, int *prot,
target_ulong *page_size,
ARMMMUFaultInfo *fi)
{
CPUState *cs = CPU(arm_env_get_cpu(env));
int level = 1;
uint32_t table;
uint32_t desc;
int type;
int ap;
int domain = 0;
int domain_prot;
hwaddr phys_addr;
uint32_t dacr;
/* Pagetable walk. */
/* Lookup l1 descriptor. */
if (!get_level1_table_address(env, mmu_idx, &table, address)) {
/* Section translation fault if page walk is disabled by PD0 or PD1 */
fi->type = ARMFault_Translation;
goto do_fault;
}
desc = arm_ldl_ptw(cs, table, regime_is_secure(env, mmu_idx),
mmu_idx, fi);
if (fi->type != ARMFault_None) {
goto do_fault;
}
type = (desc & 3);
domain = (desc >> 5) & 0x0f;
if (regime_el(env, mmu_idx) == 1) {
dacr = env->cp15.dacr_ns;
} else {
dacr = env->cp15.dacr_s;
}
domain_prot = (dacr >> (domain * 2)) & 3;
if (type == 0) {
/* Section translation fault. */
fi->type = ARMFault_Translation;
goto do_fault;
}
if (type != 2) {
level = 2;
}
if (domain_prot == 0 || domain_prot == 2) {
fi->type = ARMFault_Domain;
goto do_fault;
}
if (type == 2) {
/* 1Mb section. */
phys_addr = (desc & 0xfff00000) | (address & 0x000fffff);
ap = (desc >> 10) & 3;
*page_size = 1024 * 1024;
} else {
/* Lookup l2 entry. */
if (type == 1) {
/* Coarse pagetable. */
table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc);
} else {
/* Fine pagetable. */
table = (desc & 0xfffff000) | ((address >> 8) & 0xffc);
}
desc = arm_ldl_ptw(cs, table, regime_is_secure(env, mmu_idx),
mmu_idx, fi);
if (fi->type != ARMFault_None) {
goto do_fault;
}
switch (desc & 3) {
case 0: /* Page translation fault. */
fi->type = ARMFault_Translation;
goto do_fault;
case 1: /* 64k page. */
phys_addr = (desc & 0xffff0000) | (address & 0xffff);
ap = (desc >> (4 + ((address >> 13) & 6))) & 3;
*page_size = 0x10000;
break;
case 2: /* 4k page. */
phys_addr = (desc & 0xfffff000) | (address & 0xfff);
ap = (desc >> (4 + ((address >> 9) & 6))) & 3;
*page_size = 0x1000;
break;
case 3: /* 1k page, or ARMv6/XScale "extended small (4k) page" */
if (type == 1) {
/* ARMv6/XScale extended small page format */
if (arm_feature(env, ARM_FEATURE_XSCALE)
|| arm_feature(env, ARM_FEATURE_V6)) {
phys_addr = (desc & 0xfffff000) | (address & 0xfff);
*page_size = 0x1000;
} else {
/* UNPREDICTABLE in ARMv5; we choose to take a
* page translation fault.
*/
fi->type = ARMFault_Translation;
goto do_fault;
}
} else {
phys_addr = (desc & 0xfffffc00) | (address & 0x3ff);
*page_size = 0x400;
}
ap = (desc >> 4) & 3;
break;
default:
/* Never happens, but compiler isn't smart enough to tell. */
abort();
}
}
*prot = ap_to_rw_prot(env, mmu_idx, ap, domain_prot);
*prot |= *prot ? PAGE_EXEC : 0;
if (!(*prot & (1 << access_type))) {
/* Access permission fault. */
fi->type = ARMFault_Permission;
goto do_fault;
}
*phys_ptr = phys_addr;
return false;
do_fault:
fi->domain = domain;
fi->level = level;
return true;
}
static bool get_phys_addr_v6(CPUARMState *env, uint32_t address,
MMUAccessType access_type, ARMMMUIdx mmu_idx,
hwaddr *phys_ptr, MemTxAttrs *attrs, int *prot,
target_ulong *page_size, ARMMMUFaultInfo *fi)
{
CPUState *cs = CPU(arm_env_get_cpu(env));
int level = 1;
uint32_t table;
uint32_t desc;
uint32_t xn;
uint32_t pxn = 0;
int type;
int ap;
int domain = 0;
int domain_prot;
hwaddr phys_addr;
uint32_t dacr;
bool ns;
/* Pagetable walk. */
/* Lookup l1 descriptor. */
if (!get_level1_table_address(env, mmu_idx, &table, address)) {
/* Section translation fault if page walk is disabled by PD0 or PD1 */
fi->type = ARMFault_Translation;
goto do_fault;
}
desc = arm_ldl_ptw(cs, table, regime_is_secure(env, mmu_idx),
mmu_idx, fi);
if (fi->type != ARMFault_None) {
goto do_fault;
}
type = (desc & 3);
if (type == 0 || (type == 3 && !arm_feature(env, ARM_FEATURE_PXN))) {
/* Section translation fault, or attempt to use the encoding
* which is Reserved on implementations without PXN.
*/
fi->type = ARMFault_Translation;
goto do_fault;
}
if ((type == 1) || !(desc & (1 << 18))) {
/* Page or Section. */
domain = (desc >> 5) & 0x0f;
}
if (regime_el(env, mmu_idx) == 1) {
dacr = env->cp15.dacr_ns;
} else {
dacr = env->cp15.dacr_s;
}
if (type == 1) {
level = 2;
}
domain_prot = (dacr >> (domain * 2)) & 3;
if (domain_prot == 0 || domain_prot == 2) {
/* Section or Page domain fault */
fi->type = ARMFault_Domain;
goto do_fault;
}
if (type != 1) {
if (desc & (1 << 18)) {
/* Supersection. */
phys_addr = (desc & 0xff000000) | (address & 0x00ffffff);
phys_addr |= (uint64_t)extract32(desc, 20, 4) << 32;
phys_addr |= (uint64_t)extract32(desc, 5, 4) << 36;
*page_size = 0x1000000;
} else {
/* Section. */
phys_addr = (desc & 0xfff00000) | (address & 0x000fffff);
*page_size = 0x100000;
}
ap = ((desc >> 10) & 3) | ((desc >> 13) & 4);
xn = desc & (1 << 4);
pxn = desc & 1;
ns = extract32(desc, 19, 1);
} else {
if (arm_feature(env, ARM_FEATURE_PXN)) {
pxn = (desc >> 2) & 1;
}
ns = extract32(desc, 3, 1);
/* Lookup l2 entry. */
table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc);
desc = arm_ldl_ptw(cs, table, regime_is_secure(env, mmu_idx),
mmu_idx, fi);
if (fi->type != ARMFault_None) {
goto do_fault;
}
ap = ((desc >> 4) & 3) | ((desc >> 7) & 4);
switch (desc & 3) {
case 0: /* Page translation fault. */
fi->type = ARMFault_Translation;
goto do_fault;
case 1: /* 64k page. */
phys_addr = (desc & 0xffff0000) | (address & 0xffff);
xn = desc & (1 << 15);
*page_size = 0x10000;
break;
case 2: case 3: /* 4k page. */
phys_addr = (desc & 0xfffff000) | (address & 0xfff);
xn = desc & 1;
*page_size = 0x1000;
break;
default:
/* Never happens, but compiler isn't smart enough to tell. */
abort();
}
}
if (domain_prot == 3) {
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
} else {
if (pxn && !regime_is_user(env, mmu_idx)) {
xn = 1;
}
if (xn && access_type == MMU_INST_FETCH) {
fi->type = ARMFault_Permission;
goto do_fault;
}
if (arm_feature(env, ARM_FEATURE_V6K) &&
(regime_sctlr(env, mmu_idx) & SCTLR_AFE)) {
/* The simplified model uses AP[0] as an access control bit. */
if ((ap & 1) == 0) {
/* Access flag fault. */
fi->type = ARMFault_AccessFlag;
goto do_fault;
}
*prot = simple_ap_to_rw_prot(env, mmu_idx, ap >> 1);
} else {
*prot = ap_to_rw_prot(env, mmu_idx, ap, domain_prot);
}
if (*prot && !xn) {
*prot |= PAGE_EXEC;
}
if (!(*prot & (1 << access_type))) {
/* Access permission fault. */
fi->type = ARMFault_Permission;
goto do_fault;
}
}
if (ns) {
/* The NS bit will (as required by the architecture) have no effect if
* the CPU doesn't support TZ or this is a non-secure translation
* regime, because the attribute will already be non-secure.
*/
attrs->secure = false;
}
*phys_ptr = phys_addr;
return false;
do_fault:
fi->domain = domain;
fi->level = level;
return true;
}
/*
* check_s2_mmu_setup
* @cpu: ARMCPU
* @is_aa64: True if the translation regime is in AArch64 state
* @startlevel: Suggested starting level
* @inputsize: Bitsize of IPAs
* @stride: Page-table stride (See the ARM ARM)
*
* Returns true if the suggested S2 translation parameters are OK and
* false otherwise.
*/
static bool check_s2_mmu_setup(ARMCPU *cpu, bool is_aa64, int level,
int inputsize, int stride)
{
const int grainsize = stride + 3;
int startsizecheck;
/* Negative levels are never allowed. */
if (level < 0) {
return false;
}
startsizecheck = inputsize - ((3 - level) * stride + grainsize);
if (startsizecheck < 1 || startsizecheck > stride + 4) {
return false;
}
if (is_aa64) {
CPUARMState *env = &cpu->env;
unsigned int pamax = arm_pamax(cpu);
switch (stride) {
case 13: /* 64KB Pages. */
if (level == 0 || (level == 1 && pamax <= 42)) {
return false;
}
break;
case 11: /* 16KB Pages. */
if (level == 0 || (level == 1 && pamax <= 40)) {
return false;
}
break;
case 9: /* 4KB Pages. */
if (level == 0 && pamax <= 42) {
return false;
}
break;
default:
g_assert_not_reached();
}
/* Inputsize checks. */
if (inputsize > pamax &&
(arm_el_is_aa64(env, 1) || inputsize > 40)) {
/* This is CONSTRAINED UNPREDICTABLE and we choose to fault. */
return false;
}
} else {
/* AArch32 only supports 4KB pages. Assert on that. */
assert(stride == 9);
if (level == 0) {
return false;
}
}
return true;
}
/* Translate from the 4-bit stage 2 representation of
* memory attributes (without cache-allocation hints) to
* the 8-bit representation of the stage 1 MAIR registers
* (which includes allocation hints).
*
* ref: shared/translation/attrs/S2AttrDecode()
* .../S2ConvertAttrsHints()
*/
static uint8_t convert_stage2_attrs(CPUARMState *env, uint8_t s2attrs)
{
uint8_t hiattr = extract32(s2attrs, 2, 2);
uint8_t loattr = extract32(s2attrs, 0, 2);
uint8_t hihint = 0, lohint = 0;
if (hiattr != 0) { /* normal memory */
if ((env->cp15.hcr_el2 & HCR_CD) != 0) { /* cache disabled */
hiattr = loattr = 1; /* non-cacheable */
} else {
if (hiattr != 1) { /* Write-through or write-back */
hihint = 3; /* RW allocate */
}
if (loattr != 1) { /* Write-through or write-back */
lohint = 3; /* RW allocate */
}
}
}
return (hiattr << 6) | (hihint << 4) | (loattr << 2) | lohint;
}
static bool get_phys_addr_lpae(CPUARMState *env, target_ulong address,
MMUAccessType access_type, ARMMMUIdx mmu_idx,
hwaddr *phys_ptr, MemTxAttrs *txattrs, int *prot,
target_ulong *page_size_ptr,
ARMMMUFaultInfo *fi, ARMCacheAttrs *cacheattrs)
{
ARMCPU *cpu = arm_env_get_cpu(env);
CPUState *cs = CPU(cpu);
/* Read an LPAE long-descriptor translation table. */
ARMFaultType fault_type = ARMFault_Translation;
uint32_t level;
uint32_t epd = 0;
int32_t t0sz, t1sz;
uint32_t tg;
uint64_t ttbr;
int ttbr_select;
hwaddr descaddr, indexmask, indexmask_grainsize;
uint32_t tableattrs;
target_ulong page_size;
uint32_t attrs;
int32_t stride = 9;
int32_t addrsize;
int inputsize;
int32_t tbi = 0;
TCR *tcr = regime_tcr(env, mmu_idx);
int ap, ns, xn, pxn;
uint32_t el = regime_el(env, mmu_idx);
bool ttbr1_valid = true;
uint64_t descaddrmask;
bool aarch64 = arm_el_is_aa64(env, el);
/* TODO:
* This code does not handle the different format TCR for VTCR_EL2.
* This code also does not support shareability levels.
* Attribute and permission bit handling should also be checked when adding
* support for those page table walks.
*/
if (aarch64) {
level = 0;
addrsize = 64;
if (el > 1) {
if (mmu_idx != ARMMMUIdx_S2NS) {
tbi = extract64(tcr->raw_tcr, 20, 1);
}
} else {
if (extract64(address, 55, 1)) {
tbi = extract64(tcr->raw_tcr, 38, 1);
} else {
tbi = extract64(tcr->raw_tcr, 37, 1);
}
}
tbi *= 8;
/* If we are in 64-bit EL2 or EL3 then there is no TTBR1, so mark it
* invalid.
*/
if (el > 1) {
ttbr1_valid = false;
}
} else {
level = 1;
addrsize = 32;
/* There is no TTBR1 for EL2 */
if (el == 2) {
ttbr1_valid = false;
}
}
/* Determine whether this address is in the region controlled by
* TTBR0 or TTBR1 (or if it is in neither region and should fault).
* This is a Non-secure PL0/1 stage 1 translation, so controlled by
* TTBCR/TTBR0/TTBR1 in accordance with ARM ARM DDI0406C table B-32:
*/
if (aarch64) {
/* AArch64 translation. */
t0sz = extract32(tcr->raw_tcr, 0, 6);
t0sz = MIN(t0sz, 39);
t0sz = MAX(t0sz, 16);
} else if (mmu_idx != ARMMMUIdx_S2NS) {
/* AArch32 stage 1 translation. */
t0sz = extract32(tcr->raw_tcr, 0, 3);
} else {
/* AArch32 stage 2 translation. */
bool sext = extract32(tcr->raw_tcr, 4, 1);
bool sign = extract32(tcr->raw_tcr, 3, 1);
/* Address size is 40-bit for a stage 2 translation,
* and t0sz can be negative (from -8 to 7),
* so we need to adjust it to use the TTBR selecting logic below.
*/
addrsize = 40;
t0sz = sextract32(tcr->raw_tcr, 0, 4) + 8;
/* If the sign-extend bit is not the same as t0sz[3], the result
* is unpredictable. Flag this as a guest error. */
if (sign != sext) {
qemu_log_mask(LOG_GUEST_ERROR,
"AArch32: VTCR.S / VTCR.T0SZ[3] mismatch\n");
}
}
t1sz = extract32(tcr->raw_tcr, 16, 6);
if (aarch64) {
t1sz = MIN(t1sz, 39);
t1sz = MAX(t1sz, 16);
}
if (t0sz && !extract64(address, addrsize - t0sz, t0sz - tbi)) {
/* there is a ttbr0 region and we are in it (high bits all zero) */
ttbr_select = 0;
} else if (ttbr1_valid && t1sz &&
!extract64(~address, addrsize - t1sz, t1sz - tbi)) {
/* there is a ttbr1 region and we are in it (high bits all one) */
ttbr_select = 1;
} else if (!t0sz) {
/* ttbr0 region is "everything not in the ttbr1 region" */
ttbr_select = 0;
} else if (!t1sz && ttbr1_valid) {
/* ttbr1 region is "everything not in the ttbr0 region" */
ttbr_select = 1;
} else {
/* in the gap between the two regions, this is a Translation fault */
fault_type = ARMFault_Translation;
goto do_fault;
}
/* Note that QEMU ignores shareability and cacheability attributes,
* so we don't need to do anything with the SH, ORGN, IRGN fields
* in the TTBCR. Similarly, TTBCR:A1 selects whether we get the
* ASID from TTBR0 or TTBR1, but QEMU's TLB doesn't currently
* implement any ASID-like capability so we can ignore it (instead
* we will always flush the TLB any time the ASID is changed).
*/
if (ttbr_select == 0) {
ttbr = regime_ttbr(env, mmu_idx, 0);
if (el < 2) {
epd = extract32(tcr->raw_tcr, 7, 1);
}
inputsize = addrsize - t0sz;
tg = extract32(tcr->raw_tcr, 14, 2);
if (tg == 1) { /* 64KB pages */
stride = 13;
}
if (tg == 2) { /* 16KB pages */
stride = 11;
}
} else {
/* We should only be here if TTBR1 is valid */
assert(ttbr1_valid);
ttbr = regime_ttbr(env, mmu_idx, 1);
epd = extract32(tcr->raw_tcr, 23, 1);
inputsize = addrsize - t1sz;
tg = extract32(tcr->raw_tcr, 30, 2);
if (tg == 3) { /* 64KB pages */
stride = 13;
}
if (tg == 1) { /* 16KB pages */
stride = 11;
}
}
/* Here we should have set up all the parameters for the translation:
* inputsize, ttbr, epd, stride, tbi
*/
if (epd) {
/* Translation table walk disabled => Translation fault on TLB miss
* Note: This is always 0 on 64-bit EL2 and EL3.
*/
goto do_fault;
}
if (mmu_idx != ARMMMUIdx_S2NS) {
/* The starting level depends on the virtual address size (which can
* be up to 48 bits) and the translation granule size. It indicates
* the number of strides (stride bits at a time) needed to
* consume the bits of the input address. In the pseudocode this is:
* level = 4 - RoundUp((inputsize - grainsize) / stride)
* where their 'inputsize' is our 'inputsize', 'grainsize' is
* our 'stride + 3' and 'stride' is our 'stride'.
* Applying the usual "rounded up m/n is (m+n-1)/n" and simplifying:
* = 4 - (inputsize - stride - 3 + stride - 1) / stride
* = 4 - (inputsize - 4) / stride;
*/
level = 4 - (inputsize - 4) / stride;
} else {
/* For stage 2 translations the starting level is specified by the
* VTCR_EL2.SL0 field (whose interpretation depends on the page size)
*/
uint32_t sl0 = extract32(tcr->raw_tcr, 6, 2);
uint32_t startlevel;
bool ok;
if (!aarch64 || stride == 9) {
/* AArch32 or 4KB pages */
startlevel = 2 - sl0;
} else {
/* 16KB or 64KB pages */
startlevel = 3 - sl0;
}
/* Check that the starting level is valid. */
ok = check_s2_mmu_setup(cpu, aarch64, startlevel,
inputsize, stride);
if (!ok) {
fault_type = ARMFault_Translation;
goto do_fault;
}
level = startlevel;
}
indexmask_grainsize = (1ULL << (stride + 3)) - 1;
indexmask = (1ULL << (inputsize - (stride * (4 - level)))) - 1;
/* Now we can extract the actual base address from the TTBR */
descaddr = extract64(ttbr, 0, 48);
descaddr &= ~indexmask;
/* The address field in the descriptor goes up to bit 39 for ARMv7
* but up to bit 47 for ARMv8, but we use the descaddrmask
* up to bit 39 for AArch32, because we don't need other bits in that case
* to construct next descriptor address (anyway they should be all zeroes).
*/
descaddrmask = ((1ull << (aarch64 ? 48 : 40)) - 1) &
~indexmask_grainsize;
/* Secure accesses start with the page table in secure memory and
* can be downgraded to non-secure at any step. Non-secure accesses
* remain non-secure. We implement this by just ORing in the NSTable/NS
* bits at each step.
*/
tableattrs = regime_is_secure(env, mmu_idx) ? 0 : (1 << 4);
for (;;) {
uint64_t descriptor;
bool nstable;
descaddr |= (address >> (stride * (4 - level))) & indexmask;
descaddr &= ~7ULL;
nstable = extract32(tableattrs, 4, 1);
descriptor = arm_ldq_ptw(cs, descaddr, !nstable, mmu_idx, fi);
if (fi->type != ARMFault_None) {
goto do_fault;
}
if (!(descriptor & 1) ||
(!(descriptor & 2) && (level == 3))) {
/* Invalid, or the Reserved level 3 encoding */
goto do_fault;
}
descaddr = descriptor & descaddrmask;
if ((descriptor & 2) && (level < 3)) {
/* Table entry. The top five bits are attributes which may
* propagate down through lower levels of the table (and
* which are all arranged so that 0 means "no effect", so
* we can gather them up by ORing in the bits at each level).
*/
tableattrs |= extract64(descriptor, 59, 5);
level++;
indexmask = indexmask_grainsize;
continue;
}
/* Block entry at level 1 or 2, or page entry at level 3.
* These are basically the same thing, although the number
* of bits we pull in from the vaddr varies.
*/
page_size = (1ULL << ((stride * (4 - level)) + 3));
descaddr |= (address & (page_size - 1));
/* Extract attributes from the descriptor */
attrs = extract64(descriptor, 2, 10)
| (extract64(descriptor, 52, 12) << 10);
if (mmu_idx == ARMMMUIdx_S2NS) {
/* Stage 2 table descriptors do not include any attribute fields */
break;
}
/* Merge in attributes from table descriptors */
attrs |= extract32(tableattrs, 0, 2) << 11; /* XN, PXN */
attrs |= extract32(tableattrs, 3, 1) << 5; /* APTable[1] => AP[2] */
/* The sense of AP[1] vs APTable[0] is reversed, as APTable[0] == 1
* means "force PL1 access only", which means forcing AP[1] to 0.
*/
if (extract32(tableattrs, 2, 1)) {
attrs &= ~(1 << 4);
}
attrs |= nstable << 3; /* NS */
break;
}
/* Here descaddr is the final physical address, and attributes
* are all in attrs.
*/
fault_type = ARMFault_AccessFlag;
if ((attrs & (1 << 8)) == 0) {
/* Access flag */
goto do_fault;
}
ap = extract32(attrs, 4, 2);
xn = extract32(attrs, 12, 1);
if (mmu_idx == ARMMMUIdx_S2NS) {
ns = true;
*prot = get_S2prot(env, ap, xn);
} else {
ns = extract32(attrs, 3, 1);
pxn = extract32(attrs, 11, 1);
*prot = get_S1prot(env, mmu_idx, aarch64, ap, ns, xn, pxn);
}
fault_type = ARMFault_Permission;
if (!(*prot & (1 << access_type))) {
goto do_fault;
}
if (ns) {
/* The NS bit will (as required by the architecture) have no effect if
* the CPU doesn't support TZ or this is a non-secure translation
* regime, because the attribute will already be non-secure.
*/
txattrs->secure = false;
}
if (cacheattrs != NULL) {
if (mmu_idx == ARMMMUIdx_S2NS) {
cacheattrs->attrs = convert_stage2_attrs(env,
extract32(attrs, 0, 4));
} else {
/* Index into MAIR registers for cache attributes */
uint8_t attrindx = extract32(attrs, 0, 3);
uint64_t mair = env->cp15.mair_el[regime_el(env, mmu_idx)];
assert(attrindx <= 7);
cacheattrs->attrs = extract64(mair, attrindx * 8, 8);
}
cacheattrs->shareability = extract32(attrs, 6, 2);
}
*phys_ptr = descaddr;
*page_size_ptr = page_size;
return false;
do_fault:
fi->type = fault_type;
fi->level = level;
/* Tag the error as S2 for failed S1 PTW at S2 or ordinary S2. */
fi->stage2 = fi->s1ptw || (mmu_idx == ARMMMUIdx_S2NS);
return true;
}
static inline void get_phys_addr_pmsav7_default(CPUARMState *env,
ARMMMUIdx mmu_idx,
int32_t address, int *prot)
{
if (!arm_feature(env, ARM_FEATURE_M)) {
*prot = PAGE_READ | PAGE_WRITE;
switch (address) {
case 0xF0000000 ... 0xFFFFFFFF:
if (regime_sctlr(env, mmu_idx) & SCTLR_V) {
/* hivecs execing is ok */
*prot |= PAGE_EXEC;
}
break;
case 0x00000000 ... 0x7FFFFFFF:
*prot |= PAGE_EXEC;
break;
}
} else {
/* Default system address map for M profile cores.
* The architecture specifies which regions are execute-never;
* at the MPU level no other checks are defined.
*/
switch (address) {
case 0x00000000 ... 0x1fffffff: /* ROM */
case 0x20000000 ... 0x3fffffff: /* SRAM */
case 0x60000000 ... 0x7fffffff: /* RAM */
case 0x80000000 ... 0x9fffffff: /* RAM */
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
break;
case 0x40000000 ... 0x5fffffff: /* Peripheral */
case 0xa0000000 ... 0xbfffffff: /* Device */
case 0xc0000000 ... 0xdfffffff: /* Device */
case 0xe0000000 ... 0xffffffff: /* System */
*prot = PAGE_READ | PAGE_WRITE;
break;
default:
g_assert_not_reached();
}
}
}
static bool pmsav7_use_background_region(ARMCPU *cpu,
ARMMMUIdx mmu_idx, bool is_user)
{
/* Return true if we should use the default memory map as a
* "background" region if there are no hits against any MPU regions.
*/
CPUARMState *env = &cpu->env;
if (is_user) {
return false;
}
if (arm_feature(env, ARM_FEATURE_M)) {
return env->v7m.mpu_ctrl[regime_is_secure(env, mmu_idx)]
& R_V7M_MPU_CTRL_PRIVDEFENA_MASK;
} else {
return regime_sctlr(env, mmu_idx) & SCTLR_BR;
}
}
static inline bool m_is_ppb_region(CPUARMState *env, uint32_t address)
{
/* True if address is in the M profile PPB region 0xe0000000 - 0xe00fffff */
return arm_feature(env, ARM_FEATURE_M) &&
extract32(address, 20, 12) == 0xe00;
}
static inline bool m_is_system_region(CPUARMState *env, uint32_t address)
{
/* True if address is in the M profile system region
* 0xe0000000 - 0xffffffff
*/
return arm_feature(env, ARM_FEATURE_M) && extract32(address, 29, 3) == 0x7;
}
static bool get_phys_addr_pmsav7(CPUARMState *env, uint32_t address,
MMUAccessType access_type, ARMMMUIdx mmu_idx,
hwaddr *phys_ptr, int *prot,
target_ulong *page_size,
ARMMMUFaultInfo *fi)
{
ARMCPU *cpu = arm_env_get_cpu(env);
int n;
bool is_user = regime_is_user(env, mmu_idx);
*phys_ptr = address;
*page_size = TARGET_PAGE_SIZE;
*prot = 0;
if (regime_translation_disabled(env, mmu_idx) ||
m_is_ppb_region(env, address)) {
/* MPU disabled or M profile PPB access: use default memory map.
* The other case which uses the default memory map in the
* v7M ARM ARM pseudocode is exception vector reads from the vector
* table. In QEMU those accesses are done in arm_v7m_load_vector(),
* which always does a direct read using address_space_ldl(), rather
* than going via this function, so we don't need to check that here.
*/
get_phys_addr_pmsav7_default(env, mmu_idx, address, prot);
} else { /* MPU enabled */
for (n = (int)cpu->pmsav7_dregion - 1; n >= 0; n--) {
/* region search */
uint32_t base = env->pmsav7.drbar[n];
uint32_t rsize = extract32(env->pmsav7.drsr[n], 1, 5);
uint32_t rmask;
bool srdis = false;
if (!(env->pmsav7.drsr[n] & 0x1)) {
continue;
}
if (!rsize) {
qemu_log_mask(LOG_GUEST_ERROR,
"DRSR[%d]: Rsize field cannot be 0\n", n);
continue;
}
rsize++;
rmask = (1ull << rsize) - 1;
if (base & rmask) {
qemu_log_mask(LOG_GUEST_ERROR,
"DRBAR[%d]: 0x%" PRIx32 " misaligned "
"to DRSR region size, mask = 0x%" PRIx32 "\n",
n, base, rmask);
continue;
}
if (address < base || address > base + rmask) {
continue;
}
/* Region matched */
if (rsize >= 8) { /* no subregions for regions < 256 bytes */
int i, snd;
uint32_t srdis_mask;
rsize -= 3; /* sub region size (power of 2) */
snd = ((address - base) >> rsize) & 0x7;
srdis = extract32(env->pmsav7.drsr[n], snd + 8, 1);
srdis_mask = srdis ? 0x3 : 0x0;
for (i = 2; i <= 8 && rsize < TARGET_PAGE_BITS; i *= 2) {
/* This will check in groups of 2, 4 and then 8, whether
* the subregion bits are consistent. rsize is incremented
* back up to give the region size, considering consistent
* adjacent subregions as one region. Stop testing if rsize
* is already big enough for an entire QEMU page.
*/
int snd_rounded = snd & ~(i - 1);
uint32_t srdis_multi = extract32(env->pmsav7.drsr[n],
snd_rounded + 8, i);
if (srdis_mask ^ srdis_multi) {
break;
}
srdis_mask = (srdis_mask << i) | srdis_mask;
rsize++;
}
}
if (srdis) {
continue;
}
if (rsize < TARGET_PAGE_BITS) {
*page_size = 1 << rsize;
}
break;
}
if (n == -1) { /* no hits */
if (!pmsav7_use_background_region(cpu, mmu_idx, is_user)) {
/* background fault */
fi->type = ARMFault_Background;
return true;
}
get_phys_addr_pmsav7_default(env, mmu_idx, address, prot);
} else { /* a MPU hit! */
uint32_t ap = extract32(env->pmsav7.dracr[n], 8, 3);
uint32_t xn = extract32(env->pmsav7.dracr[n], 12, 1);
if (m_is_system_region(env, address)) {
/* System space is always execute never */
xn = 1;
}
if (is_user) { /* User mode AP bit decoding */
switch (ap) {
case 0:
case 1:
case 5:
break; /* no access */
case 3:
*prot |= PAGE_WRITE;
/* fall through */
case 2:
case 6:
*prot |= PAGE_READ | PAGE_EXEC;
break;
case 7:
/* for v7M, same as 6; for R profile a reserved value */
if (arm_feature(env, ARM_FEATURE_M)) {
*prot |= PAGE_READ | PAGE_EXEC;
break;
}
/* fall through */
default:
qemu_log_mask(LOG_GUEST_ERROR,
"DRACR[%d]: Bad value for AP bits: 0x%"
PRIx32 "\n", n, ap);
}
} else { /* Priv. mode AP bits decoding */
switch (ap) {
case 0:
break; /* no access */
case 1:
case 2:
case 3:
*prot |= PAGE_WRITE;
/* fall through */
case 5:
case 6:
*prot |= PAGE_READ | PAGE_EXEC;
break;
case 7:
/* for v7M, same as 6; for R profile a reserved value */
if (arm_feature(env, ARM_FEATURE_M)) {
*prot |= PAGE_READ | PAGE_EXEC;
break;
}
/* fall through */
default:
qemu_log_mask(LOG_GUEST_ERROR,
"DRACR[%d]: Bad value for AP bits: 0x%"
PRIx32 "\n", n, ap);
}
}
/* execute never */
if (xn) {
*prot &= ~PAGE_EXEC;
}
}
}
fi->type = ARMFault_Permission;
fi->level = 1;
/*
* Core QEMU code can't handle execution from small pages yet, so
* don't try it. This way we'll get an MPU exception, rather than
* eventually causing QEMU to exit in get_page_addr_code().
*/
if (*page_size < TARGET_PAGE_SIZE && (*prot & PAGE_EXEC)) {
qemu_log_mask(LOG_UNIMP,
"MPU: No support for execution from regions "
"smaller than 1K\n");
*prot &= ~PAGE_EXEC;
}
return !(*prot & (1 << access_type));
}
static bool v8m_is_sau_exempt(CPUARMState *env,
uint32_t address, MMUAccessType access_type)
{
/* The architecture specifies that certain address ranges are
* exempt from v8M SAU/IDAU checks.
*/
return
(access_type == MMU_INST_FETCH && m_is_system_region(env, address)) ||
(address >= 0xe0000000 && address <= 0xe0002fff) ||
(address >= 0xe000e000 && address <= 0xe000efff) ||
(address >= 0xe002e000 && address <= 0xe002efff) ||
(address >= 0xe0040000 && address <= 0xe0041fff) ||
(address >= 0xe00ff000 && address <= 0xe00fffff);
}
static void v8m_security_lookup(CPUARMState *env, uint32_t address,
MMUAccessType access_type, ARMMMUIdx mmu_idx,
V8M_SAttributes *sattrs)
{
/* Look up the security attributes for this address. Compare the
* pseudocode SecurityCheck() function.
* We assume the caller has zero-initialized *sattrs.
*/
ARMCPU *cpu = arm_env_get_cpu(env);
int r;
bool idau_exempt = false, idau_ns = true, idau_nsc = true;
int idau_region = IREGION_NOTVALID;
uint32_t addr_page_base = address & TARGET_PAGE_MASK;
uint32_t addr_page_limit = addr_page_base + (TARGET_PAGE_SIZE - 1);
if (cpu->idau) {
IDAUInterfaceClass *iic = IDAU_INTERFACE_GET_CLASS(cpu->idau);
IDAUInterface *ii = IDAU_INTERFACE(cpu->idau);
iic->check(ii, address, &idau_region, &idau_exempt, &idau_ns,
&idau_nsc);
}
if (access_type == MMU_INST_FETCH && extract32(address, 28, 4) == 0xf) {
/* 0xf0000000..0xffffffff is always S for insn fetches */
return;
}
if (idau_exempt || v8m_is_sau_exempt(env, address, access_type)) {
sattrs->ns = !regime_is_secure(env, mmu_idx);
return;
}
if (idau_region != IREGION_NOTVALID) {
sattrs->irvalid = true;
sattrs->iregion = idau_region;
}
switch (env->sau.ctrl & 3) {
case 0: /* SAU.ENABLE == 0, SAU.ALLNS == 0 */
break;
case 2: /* SAU.ENABLE == 0, SAU.ALLNS == 1 */
sattrs->ns = true;
break;
default: /* SAU.ENABLE == 1 */
for (r = 0; r < cpu->sau_sregion; r++) {
if (env->sau.rlar[r] & 1) {
uint32_t base = env->sau.rbar[r] & ~0x1f;
uint32_t limit = env->sau.rlar[r] | 0x1f;
if (base <= address && limit >= address) {
if (base > addr_page_base || limit < addr_page_limit) {
sattrs->subpage = true;
}
if (sattrs->srvalid) {
/* If we hit in more than one region then we must report
* as Secure, not NS-Callable, with no valid region
* number info.
*/
sattrs->ns = false;
sattrs->nsc = false;
sattrs->sregion = 0;
sattrs->srvalid = false;
break;
} else {
if (env->sau.rlar[r] & 2) {
sattrs->nsc = true;
} else {
sattrs->ns = true;
}
sattrs->srvalid = true;
sattrs->sregion = r;
}
}
}
}
/* The IDAU will override the SAU lookup results if it specifies
* higher security than the SAU does.
*/
if (!idau_ns) {
if (sattrs->ns || (!idau_nsc && sattrs->nsc)) {
sattrs->ns = false;
sattrs->nsc = idau_nsc;
}
}
break;
}
}
static bool pmsav8_mpu_lookup(CPUARMState *env, uint32_t address,
MMUAccessType access_type, ARMMMUIdx mmu_idx,
hwaddr *phys_ptr, MemTxAttrs *txattrs,
int *prot, bool *is_subpage,
ARMMMUFaultInfo *fi, uint32_t *mregion)
{
/* Perform a PMSAv8 MPU lookup (without also doing the SAU check
* that a full phys-to-virt translation does).
* mregion is (if not NULL) set to the region number which matched,
* or -1 if no region number is returned (MPU off, address did not
* hit a region, address hit in multiple regions).
* We set is_subpage to true if the region hit doesn't cover the
* entire TARGET_PAGE the address is within.
*/
ARMCPU *cpu = arm_env_get_cpu(env);
bool is_user = regime_is_user(env, mmu_idx);
uint32_t secure = regime_is_secure(env, mmu_idx);
int n;
int matchregion = -1;
bool hit = false;
uint32_t addr_page_base = address & TARGET_PAGE_MASK;
uint32_t addr_page_limit = addr_page_base + (TARGET_PAGE_SIZE - 1);
*is_subpage = false;
*phys_ptr = address;
*prot = 0;
if (mregion) {
*mregion = -1;
}
/* Unlike the ARM ARM pseudocode, we don't need to check whether this
* was an exception vector read from the vector table (which is always
* done using the default system address map), because those accesses
* are done in arm_v7m_load_vector(), which always does a direct
* read using address_space_ldl(), rather than going via this function.
*/
if (regime_translation_disabled(env, mmu_idx)) { /* MPU disabled */
hit = true;
} else if (m_is_ppb_region(env, address)) {
hit = true;
} else if (pmsav7_use_background_region(cpu, mmu_idx, is_user)) {
hit = true;
} else {
for (n = (int)cpu->pmsav7_dregion - 1; n >= 0; n--) {
/* region search */
/* Note that the base address is bits [31:5] from the register
* with bits [4:0] all zeroes, but the limit address is bits
* [31:5] from the register with bits [4:0] all ones.
*/
uint32_t base = env->pmsav8.rbar[secure][n] & ~0x1f;
uint32_t limit = env->pmsav8.rlar[secure][n] | 0x1f;
if (!(env->pmsav8.rlar[secure][n] & 0x1)) {
/* Region disabled */
continue;
}
if (address < base || address > limit) {
continue;
}
if (base > addr_page_base || limit < addr_page_limit) {
*is_subpage = true;
}
if (hit) {
/* Multiple regions match -- always a failure (unlike
* PMSAv7 where highest-numbered-region wins)
*/
fi->type = ARMFault_Permission;
fi->level = 1;
return true;
}
matchregion = n;
hit = true;
}
}
if (!hit) {
/* background fault */
fi->type = ARMFault_Background;
return true;
}
if (matchregion == -1) {
/* hit using the background region */
get_phys_addr_pmsav7_default(env, mmu_idx, address, prot);
} else {
uint32_t ap = extract32(env->pmsav8.rbar[secure][matchregion], 1, 2);
uint32_t xn = extract32(env->pmsav8.rbar[secure][matchregion], 0, 1);
if (m_is_system_region(env, address)) {
/* System space is always execute never */
xn = 1;
}
*prot = simple_ap_to_rw_prot(env, mmu_idx, ap);
if (*prot && !xn) {
*prot |= PAGE_EXEC;
}
/* We don't need to look the attribute up in the MAIR0/MAIR1
* registers because that only tells us about cacheability.
*/
if (mregion) {
*mregion = matchregion;
}
}
fi->type = ARMFault_Permission;
fi->level = 1;
/*
* Core QEMU code can't handle execution from small pages yet, so
* don't try it. This means any attempted execution will generate
* an MPU exception, rather than eventually causing QEMU to exit in
* get_page_addr_code().
*/
if (*is_subpage && (*prot & PAGE_EXEC)) {
qemu_log_mask(LOG_UNIMP,
"MPU: No support for execution from regions "
"smaller than 1K\n");
*prot &= ~PAGE_EXEC;
}
return !(*prot & (1 << access_type));
}
static bool get_phys_addr_pmsav8(CPUARMState *env, uint32_t address,
MMUAccessType access_type, ARMMMUIdx mmu_idx,
hwaddr *phys_ptr, MemTxAttrs *txattrs,
int *prot, target_ulong *page_size,
ARMMMUFaultInfo *fi)
{
uint32_t secure = regime_is_secure(env, mmu_idx);
V8M_SAttributes sattrs = {};
bool ret;
bool mpu_is_subpage;
if (arm_feature(env, ARM_FEATURE_M_SECURITY)) {
v8m_security_lookup(env, address, access_type, mmu_idx, &sattrs);
if (access_type == MMU_INST_FETCH) {
/* Instruction fetches always use the MMU bank and the
* transaction attribute determined by the fetch address,
* regardless of CPU state. This is painful for QEMU
* to handle, because it would mean we need to encode
* into the mmu_idx not just the (user, negpri) information
* for the current security state but also that for the
* other security state, which would balloon the number
* of mmu_idx values needed alarmingly.
* Fortunately we can avoid this because it's not actually
* possible to arbitrarily execute code from memory with
* the wrong security attribute: it will always generate
* an exception of some kind or another, apart from the
* special case of an NS CPU executing an SG instruction
* in S&NSC memory. So we always just fail the translation
* here and sort things out in the exception handler
* (including possibly emulating an SG instruction).
*/
if (sattrs.ns != !secure) {
if (sattrs.nsc) {
fi->type = ARMFault_QEMU_NSCExec;
} else {
fi->type = ARMFault_QEMU_SFault;
}
*page_size = sattrs.subpage ? 1 : TARGET_PAGE_SIZE;
*phys_ptr = address;
*prot = 0;
return true;
}
} else {
/* For data accesses we always use the MMU bank indicated
* by the current CPU state, but the security attributes
* might downgrade a secure access to nonsecure.
*/
if (sattrs.ns) {
txattrs->secure = false;
} else if (!secure) {
/* NS access to S memory must fault.
* Architecturally we should first check whether the
* MPU information for this address indicates that we
* are doing an unaligned access to Device memory, which
* should generate a UsageFault instead. QEMU does not
* currently check for that kind of unaligned access though.
* If we added it we would need to do so as a special case
* for M_FAKE_FSR_SFAULT in arm_v7m_cpu_do_interrupt().
*/
fi->type = ARMFault_QEMU_SFault;
*page_size = sattrs.subpage ? 1 : TARGET_PAGE_SIZE;
*phys_ptr = address;
*prot = 0;
return true;
}
}
}
ret = pmsav8_mpu_lookup(env, address, access_type, mmu_idx, phys_ptr,
txattrs, prot, &mpu_is_subpage, fi, NULL);
/*
* TODO: this is a temporary hack to ignore the fact that the SAU region
* is smaller than a page if this is an executable region. We never
* supported small MPU regions, but we did (accidentally) allow small
* SAU regions, and if we now made small SAU regions not be executable
* then this would break previously working guest code. We can't
* remove this until/unless we implement support for execution from
* small regions.
*/
if (*prot & PAGE_EXEC) {
sattrs.subpage = false;
}
*page_size = sattrs.subpage || mpu_is_subpage ? 1 : TARGET_PAGE_SIZE;
return ret;
}
static bool get_phys_addr_pmsav5(CPUARMState *env, uint32_t address,
MMUAccessType access_type, ARMMMUIdx mmu_idx,
hwaddr *phys_ptr, int *prot,
ARMMMUFaultInfo *fi)
{
int n;
uint32_t mask;
uint32_t base;
bool is_user = regime_is_user(env, mmu_idx);
if (regime_translation_disabled(env, mmu_idx)) {
/* MPU disabled. */
*phys_ptr = address;
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
return false;
}
*phys_ptr = address;
for (n = 7; n >= 0; n--) {
base = env->cp15.c6_region[n];
if ((base & 1) == 0) {
continue;
}
mask = 1 << ((base >> 1) & 0x1f);
/* Keep this shift separate from the above to avoid an
(undefined) << 32. */
mask = (mask << 1) - 1;
if (((base ^ address) & ~mask) == 0) {
break;
}
}
if (n < 0) {
fi->type = ARMFault_Background;
return true;
}
if (access_type == MMU_INST_FETCH) {
mask = env->cp15.pmsav5_insn_ap;
} else {
mask = env->cp15.pmsav5_data_ap;
}
mask = (mask >> (n * 4)) & 0xf;
switch (mask) {
case 0:
fi->type = ARMFault_Permission;
fi->level = 1;
return true;
case 1:
if (is_user) {
fi->type = ARMFault_Permission;
fi->level = 1;
return true;
}
*prot = PAGE_READ | PAGE_WRITE;
break;
case 2:
*prot = PAGE_READ;
if (!is_user) {
*prot |= PAGE_WRITE;
}
break;
case 3:
*prot = PAGE_READ | PAGE_WRITE;
break;
case 5:
if (is_user) {
fi->type = ARMFault_Permission;
fi->level = 1;
return true;
}
*prot = PAGE_READ;
break;
case 6:
*prot = PAGE_READ;
break;
default:
/* Bad permission. */
fi->type = ARMFault_Permission;
fi->level = 1;
return true;
}
*prot |= PAGE_EXEC;
return false;
}
/* Combine either inner or outer cacheability attributes for normal
* memory, according to table D4-42 and pseudocode procedure
* CombineS1S2AttrHints() of ARM DDI 0487B.b (the ARMv8 ARM).
*
* NB: only stage 1 includes allocation hints (RW bits), leading to
* some asymmetry.
*/
static uint8_t combine_cacheattr_nibble(uint8_t s1, uint8_t s2)
{
if (s1 == 4 || s2 == 4) {
/* non-cacheable has precedence */
return 4;
} else if (extract32(s1, 2, 2) == 0 || extract32(s1, 2, 2) == 2) {
/* stage 1 write-through takes precedence */
return s1;
} else if (extract32(s2, 2, 2) == 2) {
/* stage 2 write-through takes precedence, but the allocation hint
* is still taken from stage 1
*/
return (2 << 2) | extract32(s1, 0, 2);
} else { /* write-back */
return s1;
}
}
/* Combine S1 and S2 cacheability/shareability attributes, per D4.5.4
* and CombineS1S2Desc()
*
* @s1: Attributes from stage 1 walk
* @s2: Attributes from stage 2 walk
*/
static ARMCacheAttrs combine_cacheattrs(ARMCacheAttrs s1, ARMCacheAttrs s2)
{
uint8_t s1lo = extract32(s1.attrs, 0, 4), s2lo = extract32(s2.attrs, 0, 4);
uint8_t s1hi = extract32(s1.attrs, 4, 4), s2hi = extract32(s2.attrs, 4, 4);
ARMCacheAttrs ret;
/* Combine shareability attributes (table D4-43) */
if (s1.shareability == 2 || s2.shareability == 2) {
/* if either are outer-shareable, the result is outer-shareable */
ret.shareability = 2;
} else if (s1.shareability == 3 || s2.shareability == 3) {
/* if either are inner-shareable, the result is inner-shareable */
ret.shareability = 3;
} else {
/* both non-shareable */
ret.shareability = 0;
}
/* Combine memory type and cacheability attributes */
if (s1hi == 0 || s2hi == 0) {
/* Device has precedence over normal */
if (s1lo == 0 || s2lo == 0) {
/* nGnRnE has precedence over anything */
ret.attrs = 0;
} else if (s1lo == 4 || s2lo == 4) {
/* non-Reordering has precedence over Reordering */
ret.attrs = 4; /* nGnRE */
} else if (s1lo == 8 || s2lo == 8) {
/* non-Gathering has precedence over Gathering */
ret.attrs = 8; /* nGRE */
} else {
ret.attrs = 0xc; /* GRE */
}
/* Any location for which the resultant memory type is any
* type of Device memory is always treated as Outer Shareable.
*/
ret.shareability = 2;
} else { /* Normal memory */
/* Outer/inner cacheability combine independently */
ret.attrs = combine_cacheattr_nibble(s1hi, s2hi) << 4
| combine_cacheattr_nibble(s1lo, s2lo);
if (ret.attrs == 0x44) {
/* Any location for which the resultant memory type is Normal
* Inner Non-cacheable, Outer Non-cacheable is always treated
* as Outer Shareable.
*/
ret.shareability = 2;
}
}
return ret;
}
/* get_phys_addr - get the physical address for this virtual address
*
* Find the physical address corresponding to the given virtual address,
* by doing a translation table walk on MMU based systems or using the
* MPU state on MPU based systems.
*
* Returns false if the translation was successful. Otherwise, phys_ptr, attrs,
* prot and page_size may not be filled in, and the populated fsr value provides
* information on why the translation aborted, in the format of a
* DFSR/IFSR fault register, with the following caveats:
* * we honour the short vs long DFSR format differences.
* * the WnR bit is never set (the caller must do this).
* * for PSMAv5 based systems we don't bother to return a full FSR format
* value.
*
* @env: CPUARMState
* @address: virtual address to get physical address for
* @access_type: 0 for read, 1 for write, 2 for execute
* @mmu_idx: MMU index indicating required translation regime
* @phys_ptr: set to the physical address corresponding to the virtual address
* @attrs: set to the memory transaction attributes to use
* @prot: set to the permissions for the page containing phys_ptr
* @page_size: set to the size of the page containing phys_ptr
* @fi: set to fault info if the translation fails
* @cacheattrs: (if non-NULL) set to the cacheability/shareability attributes
*/
static bool get_phys_addr(CPUARMState *env, target_ulong address,
MMUAccessType access_type, ARMMMUIdx mmu_idx,
hwaddr *phys_ptr, MemTxAttrs *attrs, int *prot,
target_ulong *page_size,
ARMMMUFaultInfo *fi, ARMCacheAttrs *cacheattrs)
{
if (mmu_idx == ARMMMUIdx_S12NSE0 || mmu_idx == ARMMMUIdx_S12NSE1) {
/* Call ourselves recursively to do the stage 1 and then stage 2
* translations.
*/
if (arm_feature(env, ARM_FEATURE_EL2)) {
hwaddr ipa;
int s2_prot;
int ret;
ARMCacheAttrs cacheattrs2 = {};
ret = get_phys_addr(env, address, access_type,
stage_1_mmu_idx(mmu_idx), &ipa, attrs,
prot, page_size, fi, cacheattrs);
/* If S1 fails or S2 is disabled, return early. */
if (ret || regime_translation_disabled(env, ARMMMUIdx_S2NS)) {
*phys_ptr = ipa;
return ret;
}
/* S1 is done. Now do S2 translation. */
ret = get_phys_addr_lpae(env, ipa, access_type, ARMMMUIdx_S2NS,
phys_ptr, attrs, &s2_prot,
page_size, fi,
cacheattrs != NULL ? &cacheattrs2 : NULL);
fi->s2addr = ipa;
/* Combine the S1 and S2 perms. */
*prot &= s2_prot;
/* Combine the S1 and S2 cache attributes, if needed */
if (!ret && cacheattrs != NULL) {
*cacheattrs = combine_cacheattrs(*cacheattrs, cacheattrs2);
}
return ret;
} else {
/*
* For non-EL2 CPUs a stage1+stage2 translation is just stage 1.
*/
mmu_idx = stage_1_mmu_idx(mmu_idx);
}
}
/* The page table entries may downgrade secure to non-secure, but
* cannot upgrade an non-secure translation regime's attributes
* to secure.
*/
attrs->secure = regime_is_secure(env, mmu_idx);
attrs->user = regime_is_user(env, mmu_idx);
/* Fast Context Switch Extension. This doesn't exist at all in v8.
* In v7 and earlier it affects all stage 1 translations.
*/
if (address < 0x02000000 && mmu_idx != ARMMMUIdx_S2NS
&& !arm_feature(env, ARM_FEATURE_V8)) {
if (regime_el(env, mmu_idx) == 3) {
address += env->cp15.fcseidr_s;
} else {
address += env->cp15.fcseidr_ns;
}
}
if (arm_feature(env, ARM_FEATURE_PMSA)) {
bool ret;
*page_size = TARGET_PAGE_SIZE;
if (arm_feature(env, ARM_FEATURE_V8)) {
/* PMSAv8 */
ret = get_phys_addr_pmsav8(env, address, access_type, mmu_idx,
phys_ptr, attrs, prot, page_size, fi);
} else if (arm_feature(env, ARM_FEATURE_V7)) {
/* PMSAv7 */
ret = get_phys_addr_pmsav7(env, address, access_type, mmu_idx,
phys_ptr, prot, page_size, fi);
} else {
/* Pre-v7 MPU */
ret = get_phys_addr_pmsav5(env, address, access_type, mmu_idx,
phys_ptr, prot, fi);
}
qemu_log_mask(CPU_LOG_MMU, "PMSA MPU lookup for %s at 0x%08" PRIx32
" mmu_idx %u -> %s (prot %c%c%c)\n",
access_type == MMU_DATA_LOAD ? "reading" :
(access_type == MMU_DATA_STORE ? "writing" : "execute"),
(uint32_t)address, mmu_idx,
ret ? "Miss" : "Hit",
*prot & PAGE_READ ? 'r' : '-',
*prot & PAGE_WRITE ? 'w' : '-',
*prot & PAGE_EXEC ? 'x' : '-');
return ret;
}
/* Definitely a real MMU, not an MPU */
if (regime_translation_disabled(env, mmu_idx)) {
/* MMU disabled. */
*phys_ptr = address;
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
*page_size = TARGET_PAGE_SIZE;
return 0;
}
if (regime_using_lpae_format(env, mmu_idx)) {
return get_phys_addr_lpae(env, address, access_type, mmu_idx,
phys_ptr, attrs, prot, page_size,
fi, cacheattrs);
} else if (regime_sctlr(env, mmu_idx) & SCTLR_XP) {
return get_phys_addr_v6(env, address, access_type, mmu_idx,
phys_ptr, attrs, prot, page_size, fi);
} else {
return get_phys_addr_v5(env, address, access_type, mmu_idx,
phys_ptr, prot, page_size, fi);
}
}
/* Walk the page table and (if the mapping exists) add the page
* to the TLB. Return false on success, or true on failure. Populate
* fsr with ARM DFSR/IFSR fault register format value on failure.
*/
bool arm_tlb_fill(CPUState *cs, vaddr address,
MMUAccessType access_type, int mmu_idx,
ARMMMUFaultInfo *fi)
{
ARMCPU *cpu = ARM_CPU(cs);
CPUARMState *env = &cpu->env;
hwaddr phys_addr;
target_ulong page_size;
int prot;
int ret;
MemTxAttrs attrs = {};
ret = get_phys_addr(env, address, access_type,
core_to_arm_mmu_idx(env, mmu_idx), &phys_addr,
&attrs, &prot, &page_size, fi, NULL);
if (!ret) {
/*
* Map a single [sub]page. Regions smaller than our declared
* target page size are handled specially, so for those we
* pass in the exact addresses.
*/
if (page_size >= TARGET_PAGE_SIZE) {
phys_addr &= TARGET_PAGE_MASK;
address &= TARGET_PAGE_MASK;
}
tlb_set_page_with_attrs(cs, address, phys_addr, attrs,
prot, mmu_idx, page_size);
return 0;
}
return ret;
}
hwaddr arm_cpu_get_phys_page_attrs_debug(CPUState *cs, vaddr addr,
MemTxAttrs *attrs)
{
ARMCPU *cpu = ARM_CPU(cs);
CPUARMState *env = &cpu->env;
hwaddr phys_addr;
target_ulong page_size;
int prot;
bool ret;
ARMMMUFaultInfo fi = {};
ARMMMUIdx mmu_idx = core_to_arm_mmu_idx(env, cpu_mmu_index(env, false));
*attrs = (MemTxAttrs) {};
ret = get_phys_addr(env, addr, 0, mmu_idx, &phys_addr,
attrs, &prot, &page_size, &fi, NULL);
if (ret) {
return -1;
}
return phys_addr;
}
uint32_t HELPER(v7m_mrs)(CPUARMState *env, uint32_t reg)
{
uint32_t mask;
unsigned el = arm_current_el(env);
/* First handle registers which unprivileged can read */
switch (reg) {
case 0 ... 7: /* xPSR sub-fields */
mask = 0;
if ((reg & 1) && el) {
mask |= XPSR_EXCP; /* IPSR (unpriv. reads as zero) */
}
if (!(reg & 4)) {
mask |= XPSR_NZCV | XPSR_Q; /* APSR */
}
/* EPSR reads as zero */
return xpsr_read(env) & mask;
break;
case 20: /* CONTROL */
return env->v7m.control[env->v7m.secure];
case 0x94: /* CONTROL_NS */
/* We have to handle this here because unprivileged Secure code
* can read the NS CONTROL register.
*/
if (!env->v7m.secure) {
return 0;
}
return env->v7m.control[M_REG_NS];
}
if (el == 0) {
return 0; /* unprivileged reads others as zero */
}
if (arm_feature(env, ARM_FEATURE_M_SECURITY)) {
switch (reg) {
case 0x88: /* MSP_NS */
if (!env->v7m.secure) {
return 0;
}
return env->v7m.other_ss_msp;
case 0x89: /* PSP_NS */
if (!env->v7m.secure) {
return 0;
}
return env->v7m.other_ss_psp;
case 0x8a: /* MSPLIM_NS */
if (!env->v7m.secure) {
return 0;
}
return env->v7m.msplim[M_REG_NS];
case 0x8b: /* PSPLIM_NS */
if (!env->v7m.secure) {
return 0;
}
return env->v7m.psplim[M_REG_NS];
case 0x90: /* PRIMASK_NS */
if (!env->v7m.secure) {
return 0;
}
return env->v7m.primask[M_REG_NS];
case 0x91: /* BASEPRI_NS */
if (!env->v7m.secure) {
return 0;
}
return env->v7m.basepri[M_REG_NS];
case 0x93: /* FAULTMASK_NS */
if (!env->v7m.secure) {
return 0;
}
return env->v7m.faultmask[M_REG_NS];
case 0x98: /* SP_NS */
{
/* This gives the non-secure SP selected based on whether we're
* currently in handler mode or not, using the NS CONTROL.SPSEL.
*/
bool spsel = env->v7m.control[M_REG_NS] & R_V7M_CONTROL_SPSEL_MASK;
if (!env->v7m.secure) {
return 0;
}
if (!arm_v7m_is_handler_mode(env) && spsel) {
return env->v7m.other_ss_psp;
} else {
return env->v7m.other_ss_msp;
}
}
default:
break;
}
}
switch (reg) {
case 8: /* MSP */
return v7m_using_psp(env) ? env->v7m.other_sp : env->regs[13];
case 9: /* PSP */
return v7m_using_psp(env) ? env->regs[13] : env->v7m.other_sp;
case 10: /* MSPLIM */
if (!arm_feature(env, ARM_FEATURE_V8)) {
goto bad_reg;
}
return env->v7m.msplim[env->v7m.secure];
case 11: /* PSPLIM */
if (!arm_feature(env, ARM_FEATURE_V8)) {
goto bad_reg;
}
return env->v7m.psplim[env->v7m.secure];
case 16: /* PRIMASK */
return env->v7m.primask[env->v7m.secure];
case 17: /* BASEPRI */
case 18: /* BASEPRI_MAX */
return env->v7m.basepri[env->v7m.secure];
case 19: /* FAULTMASK */
return env->v7m.faultmask[env->v7m.secure];
default:
bad_reg:
qemu_log_mask(LOG_GUEST_ERROR, "Attempt to read unknown special"
" register %d\n", reg);
return 0;
}
}
void HELPER(v7m_msr)(CPUARMState *env, uint32_t maskreg, uint32_t val)
{
/* We're passed bits [11..0] of the instruction; extract
* SYSm and the mask bits.
* Invalid combinations of SYSm and mask are UNPREDICTABLE;
* we choose to treat them as if the mask bits were valid.
* NB that the pseudocode 'mask' variable is bits [11..10],
* whereas ours is [11..8].
*/
uint32_t mask = extract32(maskreg, 8, 4);
uint32_t reg = extract32(maskreg, 0, 8);
if (arm_current_el(env) == 0 && reg > 7) {
/* only xPSR sub-fields may be written by unprivileged */
return;
}
if (arm_feature(env, ARM_FEATURE_M_SECURITY)) {
switch (reg) {
case 0x88: /* MSP_NS */
if (!env->v7m.secure) {
return;
}
env->v7m.other_ss_msp = val;
return;
case 0x89: /* PSP_NS */
if (!env->v7m.secure) {
return;
}
env->v7m.other_ss_psp = val;
return;
case 0x8a: /* MSPLIM_NS */
if (!env->v7m.secure) {
return;
}
env->v7m.msplim[M_REG_NS] = val & ~7;
return;
case 0x8b: /* PSPLIM_NS */
if (!env->v7m.secure) {
return;
}
env->v7m.psplim[M_REG_NS] = val & ~7;
return;
case 0x90: /* PRIMASK_NS */
if (!env->v7m.secure) {
return;
}
env->v7m.primask[M_REG_NS] = val & 1;
return;
case 0x91: /* BASEPRI_NS */
if (!env->v7m.secure) {
return;
}
env->v7m.basepri[M_REG_NS] = val & 0xff;
return;
case 0x93: /* FAULTMASK_NS */
if (!env->v7m.secure) {
return;
}
env->v7m.faultmask[M_REG_NS] = val & 1;
return;
case 0x94: /* CONTROL_NS */
if (!env->v7m.secure) {
return;
}
write_v7m_control_spsel_for_secstate(env,
val & R_V7M_CONTROL_SPSEL_MASK,
M_REG_NS);
env->v7m.control[M_REG_NS] &= ~R_V7M_CONTROL_NPRIV_MASK;
env->v7m.control[M_REG_NS] |= val & R_V7M_CONTROL_NPRIV_MASK;
return;
case 0x98: /* SP_NS */
{
/* This gives the non-secure SP selected based on whether we're
* currently in handler mode or not, using the NS CONTROL.SPSEL.
*/
bool spsel = env->v7m.control[M_REG_NS] & R_V7M_CONTROL_SPSEL_MASK;
if (!env->v7m.secure) {
return;
}
if (!arm_v7m_is_handler_mode(env) && spsel) {
env->v7m.other_ss_psp = val;
} else {
env->v7m.other_ss_msp = val;
}
return;
}
default:
break;
}
}
switch (reg) {
case 0 ... 7: /* xPSR sub-fields */
/* only APSR is actually writable */
if (!(reg & 4)) {
uint32_t apsrmask = 0;
if (mask & 8) {
apsrmask |= XPSR_NZCV | XPSR_Q;
}
if ((mask & 4) && arm_feature(env, ARM_FEATURE_THUMB_DSP)) {
apsrmask |= XPSR_GE;
}
xpsr_write(env, val, apsrmask);
}
break;
case 8: /* MSP */
if (v7m_using_psp(env)) {
env->v7m.other_sp = val;
} else {
env->regs[13] = val;
}
break;
case 9: /* PSP */
if (v7m_using_psp(env)) {
env->regs[13] = val;
} else {
env->v7m.other_sp = val;
}
break;
case 10: /* MSPLIM */
if (!arm_feature(env, ARM_FEATURE_V8)) {
goto bad_reg;
}
env->v7m.msplim[env->v7m.secure] = val & ~7;
break;
case 11: /* PSPLIM */
if (!arm_feature(env, ARM_FEATURE_V8)) {
goto bad_reg;
}
env->v7m.psplim[env->v7m.secure] = val & ~7;
break;
case 16: /* PRIMASK */
env->v7m.primask[env->v7m.secure] = val & 1;
break;
case 17: /* BASEPRI */
env->v7m.basepri[env->v7m.secure] = val & 0xff;
break;
case 18: /* BASEPRI_MAX */
val &= 0xff;
if (val != 0 && (val < env->v7m.basepri[env->v7m.secure]
|| env->v7m.basepri[env->v7m.secure] == 0)) {
env->v7m.basepri[env->v7m.secure] = val;
}
break;
case 19: /* FAULTMASK */
env->v7m.faultmask[env->v7m.secure] = val & 1;
break;
case 20: /* CONTROL */
/* Writing to the SPSEL bit only has an effect if we are in
* thread mode; other bits can be updated by any privileged code.
* write_v7m_control_spsel() deals with updating the SPSEL bit in
* env->v7m.control, so we only need update the others.
* For v7M, we must just ignore explicit writes to SPSEL in handler
* mode; for v8M the write is permitted but will have no effect.
*/
if (arm_feature(env, ARM_FEATURE_V8) ||
!arm_v7m_is_handler_mode(env)) {
write_v7m_control_spsel(env, (val & R_V7M_CONTROL_SPSEL_MASK) != 0);
}
env->v7m.control[env->v7m.secure] &= ~R_V7M_CONTROL_NPRIV_MASK;
env->v7m.control[env->v7m.secure] |= val & R_V7M_CONTROL_NPRIV_MASK;
break;
default:
bad_reg:
qemu_log_mask(LOG_GUEST_ERROR, "Attempt to write unknown special"
" register %d\n", reg);
return;
}
}
uint32_t HELPER(v7m_tt)(CPUARMState *env, uint32_t addr, uint32_t op)
{
/* Implement the TT instruction. op is bits [7:6] of the insn. */
bool forceunpriv = op & 1;
bool alt = op & 2;
V8M_SAttributes sattrs = {};
uint32_t tt_resp;
bool r, rw, nsr, nsrw, mrvalid;
int prot;
ARMMMUFaultInfo fi = {};
MemTxAttrs attrs = {};
hwaddr phys_addr;
ARMMMUIdx mmu_idx;
uint32_t mregion;
bool targetpriv;
bool targetsec = env->v7m.secure;
bool is_subpage;
/* Work out what the security state and privilege level we're
* interested in is...
*/
if (alt) {
targetsec = !targetsec;
}
if (forceunpriv) {
targetpriv = false;
} else {
targetpriv = arm_v7m_is_handler_mode(env) ||
!(env->v7m.control[targetsec] & R_V7M_CONTROL_NPRIV_MASK);
}
/* ...and then figure out which MMU index this is */
mmu_idx = arm_v7m_mmu_idx_for_secstate_and_priv(env, targetsec, targetpriv);
/* We know that the MPU and SAU don't care about the access type
* for our purposes beyond that we don't want to claim to be
* an insn fetch, so we arbitrarily call this a read.
*/
/* MPU region info only available for privileged or if
* inspecting the other MPU state.
*/
if (arm_current_el(env) != 0 || alt) {
/* We can ignore the return value as prot is always set */
pmsav8_mpu_lookup(env, addr, MMU_DATA_LOAD, mmu_idx,
&phys_addr, &attrs, &prot, &is_subpage,
&fi, &mregion);
if (mregion == -1) {
mrvalid = false;
mregion = 0;
} else {
mrvalid = true;
}
r = prot & PAGE_READ;
rw = prot & PAGE_WRITE;
} else {
r = false;
rw = false;
mrvalid = false;
mregion = 0;
}
if (env->v7m.secure) {
v8m_security_lookup(env, addr, MMU_DATA_LOAD, mmu_idx, &sattrs);
nsr = sattrs.ns && r;
nsrw = sattrs.ns && rw;
} else {
sattrs.ns = true;
nsr = false;
nsrw = false;
}
tt_resp = (sattrs.iregion << 24) |
(sattrs.irvalid << 23) |
((!sattrs.ns) << 22) |
(nsrw << 21) |
(nsr << 20) |
(rw << 19) |
(r << 18) |
(sattrs.srvalid << 17) |
(mrvalid << 16) |
(sattrs.sregion << 8) |
mregion;
return tt_resp;
}
#endif
void HELPER(dc_zva)(CPUARMState *env, uint64_t vaddr_in)
{
/* Implement DC ZVA, which zeroes a fixed-length block of memory.
* Note that we do not implement the (architecturally mandated)
* alignment fault for attempts to use this on Device memory
* (which matches the usual QEMU behaviour of not implementing either
* alignment faults or any memory attribute handling).
*/
ARMCPU *cpu = arm_env_get_cpu(env);
uint64_t blocklen = 4 << cpu->dcz_blocksize;
uint64_t vaddr = vaddr_in & ~(blocklen - 1);
#ifndef CONFIG_USER_ONLY
{
/* Slightly awkwardly, QEMU's TARGET_PAGE_SIZE may be less than
* the block size so we might have to do more than one TLB lookup.
* We know that in fact for any v8 CPU the page size is at least 4K
* and the block size must be 2K or less, but TARGET_PAGE_SIZE is only
* 1K as an artefact of legacy v5 subpage support being present in the
* same QEMU executable.
*/
int maxidx = DIV_ROUND_UP(blocklen, TARGET_PAGE_SIZE);
void *hostaddr[maxidx];
int try, i;
unsigned mmu_idx = cpu_mmu_index(env, false);
TCGMemOpIdx oi = make_memop_idx(MO_UB, mmu_idx);
for (try = 0; try < 2; try++) {
for (i = 0; i < maxidx; i++) {
hostaddr[i] = tlb_vaddr_to_host(env,
vaddr + TARGET_PAGE_SIZE * i,
1, mmu_idx);
if (!hostaddr[i]) {
break;
}
}
if (i == maxidx) {
/* If it's all in the TLB it's fair game for just writing to;
* we know we don't need to update dirty status, etc.
*/
for (i = 0; i < maxidx - 1; i++) {
memset(hostaddr[i], 0, TARGET_PAGE_SIZE);
}
memset(hostaddr[i], 0, blocklen - (i * TARGET_PAGE_SIZE));
return;
}
/* OK, try a store and see if we can populate the tlb. This
* might cause an exception if the memory isn't writable,
* in which case we will longjmp out of here. We must for
* this purpose use the actual register value passed to us
* so that we get the fault address right.
*/
helper_ret_stb_mmu(env, vaddr_in, 0, oi, GETPC());
/* Now we can populate the other TLB entries, if any */
for (i = 0; i < maxidx; i++) {
uint64_t va = vaddr + TARGET_PAGE_SIZE * i;
if (va != (vaddr_in & TARGET_PAGE_MASK)) {
helper_ret_stb_mmu(env, va, 0, oi, GETPC());
}
}
}
/* Slow path (probably attempt to do this to an I/O device or
* similar, or clearing of a block of code we have translations
* cached for). Just do a series of byte writes as the architecture
* demands. It's not worth trying to use a cpu_physical_memory_map(),
* memset(), unmap() sequence here because:
* + we'd need to account for the blocksize being larger than a page
* + the direct-RAM access case is almost always going to be dealt
* with in the fastpath code above, so there's no speed benefit
* + we would have to deal with the map returning NULL because the
* bounce buffer was in use
*/
for (i = 0; i < blocklen; i++) {
helper_ret_stb_mmu(env, vaddr + i, 0, oi, GETPC());
}
}
#else
memset(g2h(vaddr), 0, blocklen);
#endif
}
/* Note that signed overflow is undefined in C. The following routines are
careful to use unsigned types where modulo arithmetic is required.
Failure to do so _will_ break on newer gcc. */
/* Signed saturating arithmetic. */
/* Perform 16-bit signed saturating addition. */
static inline uint16_t add16_sat(uint16_t a, uint16_t b)
{
uint16_t res;
res = a + b;
if (((res ^ a) & 0x8000) && !((a ^ b) & 0x8000)) {
if (a & 0x8000)
res = 0x8000;
else
res = 0x7fff;
}
return res;
}
/* Perform 8-bit signed saturating addition. */
static inline uint8_t add8_sat(uint8_t a, uint8_t b)
{
uint8_t res;
res = a + b;
if (((res ^ a) & 0x80) && !((a ^ b) & 0x80)) {
if (a & 0x80)
res = 0x80;
else
res = 0x7f;
}
return res;
}
/* Perform 16-bit signed saturating subtraction. */
static inline uint16_t sub16_sat(uint16_t a, uint16_t b)
{
uint16_t res;
res = a - b;
if (((res ^ a) & 0x8000) && ((a ^ b) & 0x8000)) {
if (a & 0x8000)
res = 0x8000;
else
res = 0x7fff;
}
return res;
}
/* Perform 8-bit signed saturating subtraction. */
static inline uint8_t sub8_sat(uint8_t a, uint8_t b)
{
uint8_t res;
res = a - b;
if (((res ^ a) & 0x80) && ((a ^ b) & 0x80)) {
if (a & 0x80)
res = 0x80;
else
res = 0x7f;
}
return res;
}
#define ADD16(a, b, n) RESULT(add16_sat(a, b), n, 16);
#define SUB16(a, b, n) RESULT(sub16_sat(a, b), n, 16);
#define ADD8(a, b, n) RESULT(add8_sat(a, b), n, 8);
#define SUB8(a, b, n) RESULT(sub8_sat(a, b), n, 8);
#define PFX q
#include "op_addsub.h"
/* Unsigned saturating arithmetic. */
static inline uint16_t add16_usat(uint16_t a, uint16_t b)
{
uint16_t res;
res = a + b;
if (res < a)
res = 0xffff;
return res;
}
static inline uint16_t sub16_usat(uint16_t a, uint16_t b)
{
if (a > b)
return a - b;
else
return 0;
}
static inline uint8_t add8_usat(uint8_t a, uint8_t b)
{
uint8_t res;
res = a + b;
if (res < a)
res = 0xff;
return res;
}
static inline uint8_t sub8_usat(uint8_t a, uint8_t b)
{
if (a > b)
return a - b;
else
return 0;
}
#define ADD16(a, b, n) RESULT(add16_usat(a, b), n, 16);
#define SUB16(a, b, n) RESULT(sub16_usat(a, b), n, 16);
#define ADD8(a, b, n) RESULT(add8_usat(a, b), n, 8);
#define SUB8(a, b, n) RESULT(sub8_usat(a, b), n, 8);
#define PFX uq
#include "op_addsub.h"
/* Signed modulo arithmetic. */
#define SARITH16(a, b, n, op) do { \
int32_t sum; \
sum = (int32_t)(int16_t)(a) op (int32_t)(int16_t)(b); \
RESULT(sum, n, 16); \
if (sum >= 0) \
ge |= 3 << (n * 2); \
} while(0)
#define SARITH8(a, b, n, op) do { \
int32_t sum; \
sum = (int32_t)(int8_t)(a) op (int32_t)(int8_t)(b); \
RESULT(sum, n, 8); \
if (sum >= 0) \
ge |= 1 << n; \
} while(0)
#define ADD16(a, b, n) SARITH16(a, b, n, +)
#define SUB16(a, b, n) SARITH16(a, b, n, -)
#define ADD8(a, b, n) SARITH8(a, b, n, +)
#define SUB8(a, b, n) SARITH8(a, b, n, -)
#define PFX s
#define ARITH_GE
#include "op_addsub.h"
/* Unsigned modulo arithmetic. */
#define ADD16(a, b, n) do { \
uint32_t sum; \
sum = (uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b); \
RESULT(sum, n, 16); \
if ((sum >> 16) == 1) \
ge |= 3 << (n * 2); \
} while(0)
#define ADD8(a, b, n) do { \
uint32_t sum; \
sum = (uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b); \
RESULT(sum, n, 8); \
if ((sum >> 8) == 1) \
ge |= 1 << n; \
} while(0)
#define SUB16(a, b, n) do { \
uint32_t sum; \
sum = (uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b); \
RESULT(sum, n, 16); \
if ((sum >> 16) == 0) \
ge |= 3 << (n * 2); \
} while(0)
#define SUB8(a, b, n) do { \
uint32_t sum; \
sum = (uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b); \
RESULT(sum, n, 8); \
if ((sum >> 8) == 0) \
ge |= 1 << n; \
} while(0)
#define PFX u
#define ARITH_GE
#include "op_addsub.h"
/* Halved signed arithmetic. */
#define ADD16(a, b, n) \
RESULT(((int32_t)(int16_t)(a) + (int32_t)(int16_t)(b)) >> 1, n, 16)
#define SUB16(a, b, n) \
RESULT(((int32_t)(int16_t)(a) - (int32_t)(int16_t)(b)) >> 1, n, 16)
#define ADD8(a, b, n) \
RESULT(((int32_t)(int8_t)(a) + (int32_t)(int8_t)(b)) >> 1, n, 8)
#define SUB8(a, b, n) \
RESULT(((int32_t)(int8_t)(a) - (int32_t)(int8_t)(b)) >> 1, n, 8)
#define PFX sh
#include "op_addsub.h"
/* Halved unsigned arithmetic. */
#define ADD16(a, b, n) \
RESULT(((uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b)) >> 1, n, 16)
#define SUB16(a, b, n) \
RESULT(((uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b)) >> 1, n, 16)
#define ADD8(a, b, n) \
RESULT(((uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b)) >> 1, n, 8)
#define SUB8(a, b, n) \
RESULT(((uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b)) >> 1, n, 8)
#define PFX uh
#include "op_addsub.h"
static inline uint8_t do_usad(uint8_t a, uint8_t b)
{
if (a > b)
return a - b;
else
return b - a;
}
/* Unsigned sum of absolute byte differences. */
uint32_t HELPER(usad8)(uint32_t a, uint32_t b)
{
uint32_t sum;
sum = do_usad(a, b);
sum += do_usad(a >> 8, b >> 8);
sum += do_usad(a >> 16, b >>16);
sum += do_usad(a >> 24, b >> 24);
return sum;
}
/* For ARMv6 SEL instruction. */
uint32_t HELPER(sel_flags)(uint32_t flags, uint32_t a, uint32_t b)
{
uint32_t mask;
mask = 0;
if (flags & 1)
mask |= 0xff;
if (flags & 2)
mask |= 0xff00;
if (flags & 4)
mask |= 0xff0000;
if (flags & 8)
mask |= 0xff000000;
return (a & mask) | (b & ~mask);
}
/* VFP support. We follow the convention used for VFP instructions:
Single precision routines have a "s" suffix, double precision a
"d" suffix. */
/* Convert host exception flags to vfp form. */
static inline int vfp_exceptbits_from_host(int host_bits)
{
int target_bits = 0;
if (host_bits & float_flag_invalid)
target_bits |= 1;
if (host_bits & float_flag_divbyzero)
target_bits |= 2;
if (host_bits & float_flag_overflow)
target_bits |= 4;
if (host_bits & (float_flag_underflow | float_flag_output_denormal))
target_bits |= 8;
if (host_bits & float_flag_inexact)
target_bits |= 0x10;
if (host_bits & float_flag_input_denormal)
target_bits |= 0x80;
return target_bits;
}
uint32_t HELPER(vfp_get_fpscr)(CPUARMState *env)
{
int i;
uint32_t fpscr;
fpscr = (env->vfp.xregs[ARM_VFP_FPSCR] & 0xffc8ffff)
| (env->vfp.vec_len << 16)
| (env->vfp.vec_stride << 20);
i = get_float_exception_flags(&env->vfp.fp_status);
i |= get_float_exception_flags(&env->vfp.standard_fp_status);
i |= get_float_exception_flags(&env->vfp.fp_status_f16);
fpscr |= vfp_exceptbits_from_host(i);
return fpscr;
}
uint32_t vfp_get_fpscr(CPUARMState *env)
{
return HELPER(vfp_get_fpscr)(env);
}
/* Convert vfp exception flags to target form. */
static inline int vfp_exceptbits_to_host(int target_bits)
{
int host_bits = 0;
if (target_bits & 1)
host_bits |= float_flag_invalid;
if (target_bits & 2)
host_bits |= float_flag_divbyzero;
if (target_bits & 4)
host_bits |= float_flag_overflow;
if (target_bits & 8)
host_bits |= float_flag_underflow;
if (target_bits & 0x10)
host_bits |= float_flag_inexact;
if (target_bits & 0x80)
host_bits |= float_flag_input_denormal;
return host_bits;
}
void HELPER(vfp_set_fpscr)(CPUARMState *env, uint32_t val)
{
int i;
uint32_t changed;
changed = env->vfp.xregs[ARM_VFP_FPSCR];
env->vfp.xregs[ARM_VFP_FPSCR] = (val & 0xffc8ffff);
env->vfp.vec_len = (val >> 16) & 7;
env->vfp.vec_stride = (val >> 20) & 3;
changed ^= val;
if (changed & (3 << 22)) {
i = (val >> 22) & 3;
switch (i) {
case FPROUNDING_TIEEVEN:
i = float_round_nearest_even;
break;
case FPROUNDING_POSINF:
i = float_round_up;
break;
case FPROUNDING_NEGINF:
i = float_round_down;
break;
case FPROUNDING_ZERO:
i = float_round_to_zero;
break;
}
set_float_rounding_mode(i, &env->vfp.fp_status);
set_float_rounding_mode(i, &env->vfp.fp_status_f16);
}
if (changed & FPCR_FZ16) {
bool ftz_enabled = val & FPCR_FZ16;
set_flush_to_zero(ftz_enabled, &env->vfp.fp_status_f16);
set_flush_inputs_to_zero(ftz_enabled, &env->vfp.fp_status_f16);
}
if (changed & FPCR_FZ) {
bool ftz_enabled = val & FPCR_FZ;
set_flush_to_zero(ftz_enabled, &env->vfp.fp_status);
set_flush_inputs_to_zero(ftz_enabled, &env->vfp.fp_status);
}
if (changed & FPCR_DN) {
bool dnan_enabled = val & FPCR_DN;
set_default_nan_mode(dnan_enabled, &env->vfp.fp_status);
set_default_nan_mode(dnan_enabled, &env->vfp.fp_status_f16);
}
/* The exception flags are ORed together when we read fpscr so we
* only need to preserve the current state in one of our
* float_status values.
*/
i = vfp_exceptbits_to_host(val);
set_float_exception_flags(i, &env->vfp.fp_status);
set_float_exception_flags(0, &env->vfp.fp_status_f16);
set_float_exception_flags(0, &env->vfp.standard_fp_status);
}
void vfp_set_fpscr(CPUARMState *env, uint32_t val)
{
HELPER(vfp_set_fpscr)(env, val);
}
#define VFP_HELPER(name, p) HELPER(glue(glue(vfp_,name),p))
#define VFP_BINOP(name) \
float32 VFP_HELPER(name, s)(float32 a, float32 b, void *fpstp) \
{ \
float_status *fpst = fpstp; \
return float32_ ## name(a, b, fpst); \
} \
float64 VFP_HELPER(name, d)(float64 a, float64 b, void *fpstp) \
{ \
float_status *fpst = fpstp; \
return float64_ ## name(a, b, fpst); \
}
VFP_BINOP(add)
VFP_BINOP(sub)
VFP_BINOP(mul)
VFP_BINOP(div)
VFP_BINOP(min)
VFP_BINOP(max)
VFP_BINOP(minnum)
VFP_BINOP(maxnum)
#undef VFP_BINOP
float32 VFP_HELPER(neg, s)(float32 a)
{
return float32_chs(a);
}
float64 VFP_HELPER(neg, d)(float64 a)
{
return float64_chs(a);
}
float32 VFP_HELPER(abs, s)(float32 a)
{
return float32_abs(a);
}
float64 VFP_HELPER(abs, d)(float64 a)
{
return float64_abs(a);
}
float32 VFP_HELPER(sqrt, s)(float32 a, CPUARMState *env)
{
return float32_sqrt(a, &env->vfp.fp_status);
}
float64 VFP_HELPER(sqrt, d)(float64 a, CPUARMState *env)
{
return float64_sqrt(a, &env->vfp.fp_status);
}
/* XXX: check quiet/signaling case */
#define DO_VFP_cmp(p, type) \
void VFP_HELPER(cmp, p)(type a, type b, CPUARMState *env) \
{ \
uint32_t flags; \
switch(type ## _compare_quiet(a, b, &env->vfp.fp_status)) { \
case 0: flags = 0x6; break; \
case -1: flags = 0x8; break; \
case 1: flags = 0x2; break; \
default: case 2: flags = 0x3; break; \
} \
env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
| (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
} \
void VFP_HELPER(cmpe, p)(type a, type b, CPUARMState *env) \
{ \
uint32_t flags; \
switch(type ## _compare(a, b, &env->vfp.fp_status)) { \
case 0: flags = 0x6; break; \
case -1: flags = 0x8; break; \
case 1: flags = 0x2; break; \
default: case 2: flags = 0x3; break; \
} \
env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
| (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
}
DO_VFP_cmp(s, float32)
DO_VFP_cmp(d, float64)
#undef DO_VFP_cmp
/* Integer to float and float to integer conversions */
#define CONV_ITOF(name, ftype, fsz, sign) \
ftype HELPER(name)(uint32_t x, void *fpstp) \
{ \
float_status *fpst = fpstp; \
return sign##int32_to_##float##fsz((sign##int32_t)x, fpst); \
}
#define CONV_FTOI(name, ftype, fsz, sign, round) \
sign##int32_t HELPER(name)(ftype x, void *fpstp) \
{ \
float_status *fpst = fpstp; \
if (float##fsz##_is_any_nan(x)) { \
float_raise(float_flag_invalid, fpst); \
return 0; \
} \
return float##fsz##_to_##sign##int32##round(x, fpst); \
}
#define FLOAT_CONVS(name, p, ftype, fsz, sign) \
CONV_ITOF(vfp_##name##to##p, ftype, fsz, sign) \
CONV_FTOI(vfp_to##name##p, ftype, fsz, sign, ) \
CONV_FTOI(vfp_to##name##z##p, ftype, fsz, sign, _round_to_zero)
FLOAT_CONVS(si, h, uint32_t, 16, )
FLOAT_CONVS(si, s, float32, 32, )
FLOAT_CONVS(si, d, float64, 64, )
FLOAT_CONVS(ui, h, uint32_t, 16, u)
FLOAT_CONVS(ui, s, float32, 32, u)
FLOAT_CONVS(ui, d, float64, 64, u)
#undef CONV_ITOF
#undef CONV_FTOI
#undef FLOAT_CONVS
/* floating point conversion */
float64 VFP_HELPER(fcvtd, s)(float32 x, CPUARMState *env)
{
return float32_to_float64(x, &env->vfp.fp_status);
}
float32 VFP_HELPER(fcvts, d)(float64 x, CPUARMState *env)
{
return float64_to_float32(x, &env->vfp.fp_status);
}
/* VFP3 fixed point conversion. */
#define VFP_CONV_FIX_FLOAT(name, p, fsz, isz, itype) \
float##fsz HELPER(vfp_##name##to##p)(uint##isz##_t x, uint32_t shift, \
void *fpstp) \
{ \
float_status *fpst = fpstp; \
float##fsz tmp; \
tmp = itype##_to_##float##fsz(x, fpst); \
return float##fsz##_scalbn(tmp, -(int)shift, fpst); \
}
/* Notice that we want only input-denormal exception flags from the
* scalbn operation: the other possible flags (overflow+inexact if
* we overflow to infinity, output-denormal) aren't correct for the
* complete scale-and-convert operation.
*/
#define VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, round) \
uint##isz##_t HELPER(vfp_to##name##p##round)(float##fsz x, \
uint32_t shift, \
void *fpstp) \
{ \
float_status *fpst = fpstp; \
int old_exc_flags = get_float_exception_flags(fpst); \
float##fsz tmp; \
if (float##fsz##_is_any_nan(x)) { \
float_raise(float_flag_invalid, fpst); \
return 0; \
} \
tmp = float##fsz##_scalbn(x, shift, fpst); \
old_exc_flags |= get_float_exception_flags(fpst) \
& float_flag_input_denormal; \
set_float_exception_flags(old_exc_flags, fpst); \
return float##fsz##_to_##itype##round(tmp, fpst); \
}
#define VFP_CONV_FIX(name, p, fsz, isz, itype) \
VFP_CONV_FIX_FLOAT(name, p, fsz, isz, itype) \
VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, _round_to_zero) \
VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, )
#define VFP_CONV_FIX_A64(name, p, fsz, isz, itype) \
VFP_CONV_FIX_FLOAT(name, p, fsz, isz, itype) \
VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, )
VFP_CONV_FIX(sh, d, 64, 64, int16)
VFP_CONV_FIX(sl, d, 64, 64, int32)
VFP_CONV_FIX_A64(sq, d, 64, 64, int64)
VFP_CONV_FIX(uh, d, 64, 64, uint16)
VFP_CONV_FIX(ul, d, 64, 64, uint32)
VFP_CONV_FIX_A64(uq, d, 64, 64, uint64)
VFP_CONV_FIX(sh, s, 32, 32, int16)
VFP_CONV_FIX(sl, s, 32, 32, int32)
VFP_CONV_FIX_A64(sq, s, 32, 64, int64)
VFP_CONV_FIX(uh, s, 32, 32, uint16)
VFP_CONV_FIX(ul, s, 32, 32, uint32)
VFP_CONV_FIX_A64(uq, s, 32, 64, uint64)
#undef VFP_CONV_FIX
#undef VFP_CONV_FIX_FLOAT
#undef VFP_CONV_FLOAT_FIX_ROUND
#undef VFP_CONV_FIX_A64
/* Conversion to/from f16 can overflow to infinity before/after scaling.
* Therefore we convert to f64, scale, and then convert f64 to f16; or
* vice versa for conversion to integer.
*
* For 16- and 32-bit integers, the conversion to f64 never rounds.
* For 64-bit integers, any integer that would cause rounding will also
* overflow to f16 infinity, so there is no double rounding problem.
*/
static float16 do_postscale_fp16(float64 f, int shift, float_status *fpst)
{
return float64_to_float16(float64_scalbn(f, -shift, fpst), true, fpst);
}
uint32_t HELPER(vfp_sltoh)(uint32_t x, uint32_t shift, void *fpst)
{
return do_postscale_fp16(int32_to_float64(x, fpst), shift, fpst);
}
uint32_t HELPER(vfp_ultoh)(uint32_t x, uint32_t shift, void *fpst)
{
return do_postscale_fp16(uint32_to_float64(x, fpst), shift, fpst);
}
uint32_t HELPER(vfp_sqtoh)(uint64_t x, uint32_t shift, void *fpst)
{
return do_postscale_fp16(int64_to_float64(x, fpst), shift, fpst);
}
uint32_t HELPER(vfp_uqtoh)(uint64_t x, uint32_t shift, void *fpst)
{
return do_postscale_fp16(uint64_to_float64(x, fpst), shift, fpst);
}
static float64 do_prescale_fp16(float16 f, int shift, float_status *fpst)
{
if (unlikely(float16_is_any_nan(f))) {
float_raise(float_flag_invalid, fpst);
return 0;
} else {
int old_exc_flags = get_float_exception_flags(fpst);
float64 ret;
ret = float16_to_float64(f, true, fpst);
ret = float64_scalbn(ret, shift, fpst);
old_exc_flags |= get_float_exception_flags(fpst)
& float_flag_input_denormal;
set_float_exception_flags(old_exc_flags, fpst);
return ret;
}
}
uint32_t HELPER(vfp_toshh)(uint32_t x, uint32_t shift, void *fpst)
{
return float64_to_int16(do_prescale_fp16(x, shift, fpst), fpst);
}
uint32_t HELPER(vfp_touhh)(uint32_t x, uint32_t shift, void *fpst)
{
return float64_to_uint16(do_prescale_fp16(x, shift, fpst), fpst);
}
uint32_t HELPER(vfp_toslh)(uint32_t x, uint32_t shift, void *fpst)
{
return float64_to_int32(do_prescale_fp16(x, shift, fpst), fpst);
}
uint32_t HELPER(vfp_toulh)(uint32_t x, uint32_t shift, void *fpst)
{
return float64_to_uint32(do_prescale_fp16(x, shift, fpst), fpst);
}
uint64_t HELPER(vfp_tosqh)(uint32_t x, uint32_t shift, void *fpst)
{
return float64_to_int64(do_prescale_fp16(x, shift, fpst), fpst);
}
uint64_t HELPER(vfp_touqh)(uint32_t x, uint32_t shift, void *fpst)
{
return float64_to_uint64(do_prescale_fp16(x, shift, fpst), fpst);
}
/* Set the current fp rounding mode and return the old one.
* The argument is a softfloat float_round_ value.
*/
uint32_t HELPER(set_rmode)(uint32_t rmode, void *fpstp)
{
float_status *fp_status = fpstp;
uint32_t prev_rmode = get_float_rounding_mode(fp_status);
set_float_rounding_mode(rmode, fp_status);
return prev_rmode;
}
/* Set the current fp rounding mode in the standard fp status and return
* the old one. This is for NEON instructions that need to change the
* rounding mode but wish to use the standard FPSCR values for everything
* else. Always set the rounding mode back to the correct value after
* modifying it.
* The argument is a softfloat float_round_ value.
*/
uint32_t HELPER(set_neon_rmode)(uint32_t rmode, CPUARMState *env)
{
float_status *fp_status = &env->vfp.standard_fp_status;
uint32_t prev_rmode = get_float_rounding_mode(fp_status);
set_float_rounding_mode(rmode, fp_status);
return prev_rmode;
}
/* Half precision conversions. */
float32 HELPER(vfp_fcvt_f16_to_f32)(uint32_t a, void *fpstp, uint32_t ahp_mode)
{
/* Squash FZ16 to 0 for the duration of conversion. In this case,
* it would affect flushing input denormals.
*/
float_status *fpst = fpstp;
flag save = get_flush_inputs_to_zero(fpst);
set_flush_inputs_to_zero(false, fpst);
float32 r = float16_to_float32(a, !ahp_mode, fpst);
set_flush_inputs_to_zero(save, fpst);
return r;
}
uint32_t HELPER(vfp_fcvt_f32_to_f16)(float32 a, void *fpstp, uint32_t ahp_mode)
{
/* Squash FZ16 to 0 for the duration of conversion. In this case,
* it would affect flushing output denormals.
*/
float_status *fpst = fpstp;
flag save = get_flush_to_zero(fpst);
set_flush_to_zero(false, fpst);
float16 r = float32_to_float16(a, !ahp_mode, fpst);
set_flush_to_zero(save, fpst);
return r;
}
float64 HELPER(vfp_fcvt_f16_to_f64)(uint32_t a, void *fpstp, uint32_t ahp_mode)
{
/* Squash FZ16 to 0 for the duration of conversion. In this case,
* it would affect flushing input denormals.
*/
float_status *fpst = fpstp;
flag save = get_flush_inputs_to_zero(fpst);
set_flush_inputs_to_zero(false, fpst);
float64 r = float16_to_float64(a, !ahp_mode, fpst);
set_flush_inputs_to_zero(save, fpst);
return r;
}
uint32_t HELPER(vfp_fcvt_f64_to_f16)(float64 a, void *fpstp, uint32_t ahp_mode)
{
/* Squash FZ16 to 0 for the duration of conversion. In this case,
* it would affect flushing output denormals.
*/
float_status *fpst = fpstp;
flag save = get_flush_to_zero(fpst);
set_flush_to_zero(false, fpst);
float16 r = float64_to_float16(a, !ahp_mode, fpst);
set_flush_to_zero(save, fpst);
return r;
}
#define float32_two make_float32(0x40000000)
#define float32_three make_float32(0x40400000)
#define float32_one_point_five make_float32(0x3fc00000)
float32 HELPER(recps_f32)(float32 a, float32 b, CPUARMState *env)
{
float_status *s = &env->vfp.standard_fp_status;
if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) ||
(float32_is_infinity(b) && float32_is_zero_or_denormal(a))) {
if (!(float32_is_zero(a) || float32_is_zero(b))) {
float_raise(float_flag_input_denormal, s);
}
return float32_two;
}
return float32_sub(float32_two, float32_mul(a, b, s), s);
}
float32 HELPER(rsqrts_f32)(float32 a, float32 b, CPUARMState *env)
{
float_status *s = &env->vfp.standard_fp_status;
float32 product;
if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) ||
(float32_is_infinity(b) && float32_is_zero_or_denormal(a))) {
if (!(float32_is_zero(a) || float32_is_zero(b))) {
float_raise(float_flag_input_denormal, s);
}
return float32_one_point_five;
}
product = float32_mul(a, b, s);
return float32_div(float32_sub(float32_three, product, s), float32_two, s);
}
/* NEON helpers. */
/* Constants 256 and 512 are used in some helpers; we avoid relying on
* int->float conversions at run-time. */
#define float64_256 make_float64(0x4070000000000000LL)
#define float64_512 make_float64(0x4080000000000000LL)
#define float16_maxnorm make_float16(0x7bff)
#define float32_maxnorm make_float32(0x7f7fffff)
#define float64_maxnorm make_float64(0x7fefffffffffffffLL)
/* Reciprocal functions
*
* The algorithm that must be used to calculate the estimate
* is specified by the ARM ARM, see FPRecipEstimate()/RecipEstimate
*/
/* See RecipEstimate()
*
* input is a 9 bit fixed point number
* input range 256 .. 511 for a number from 0.5 <= x < 1.0.
* result range 256 .. 511 for a number from 1.0 to 511/256.
*/
static int recip_estimate(int input)
{
int a, b, r;
assert(256 <= input && input < 512);
a = (input * 2) + 1;
b = (1 << 19) / a;
r = (b + 1) >> 1;
assert(256 <= r && r < 512);
return r;
}
/*
* Common wrapper to call recip_estimate
*
* The parameters are exponent and 64 bit fraction (without implicit
* bit) where the binary point is nominally at bit 52. Returns a
* float64 which can then be rounded to the appropriate size by the
* callee.
*/
static uint64_t call_recip_estimate(int *exp, int exp_off, uint64_t frac)
{
uint32_t scaled, estimate;
uint64_t result_frac;
int result_exp;
/* Handle sub-normals */
if (*exp == 0) {
if (extract64(frac, 51, 1) == 0) {
*exp = -1;
frac <<= 2;
} else {
frac <<= 1;
}
}
/* scaled = UInt('1':fraction<51:44>) */
scaled = deposit32(1 << 8, 0, 8, extract64(frac, 44, 8));
estimate = recip_estimate(scaled);
result_exp = exp_off - *exp;
result_frac = deposit64(0, 44, 8, estimate);
if (result_exp == 0) {
result_frac = deposit64(result_frac >> 1, 51, 1, 1);
} else if (result_exp == -1) {
result_frac = deposit64(result_frac >> 2, 50, 2, 1);
result_exp = 0;
}
*exp = result_exp;
return result_frac;
}
static bool round_to_inf(float_status *fpst, bool sign_bit)
{
switch (fpst->float_rounding_mode) {
case float_round_nearest_even: /* Round to Nearest */
return true;
case float_round_up: /* Round to +Inf */
return !sign_bit;
case float_round_down: /* Round to -Inf */
return sign_bit;
case float_round_to_zero: /* Round to Zero */
return false;
}
g_assert_not_reached();
}
uint32_t HELPER(recpe_f16)(uint32_t input, void *fpstp)
{
float_status *fpst = fpstp;
float16 f16 = float16_squash_input_denormal(input, fpst);
uint32_t f16_val = float16_val(f16);
uint32_t f16_sign = float16_is_neg(f16);
int f16_exp = extract32(f16_val, 10, 5);
uint32_t f16_frac = extract32(f16_val, 0, 10);
uint64_t f64_frac;
if (float16_is_any_nan(f16)) {
float16 nan = f16;
if (float16_is_signaling_nan(f16, fpst)) {
float_raise(float_flag_invalid, fpst);
nan = float16_silence_nan(f16, fpst);
}
if (fpst->default_nan_mode) {
nan = float16_default_nan(fpst);
}
return nan;
} else if (float16_is_infinity(f16)) {
return float16_set_sign(float16_zero, float16_is_neg(f16));
} else if (float16_is_zero(f16)) {
float_raise(float_flag_divbyzero, fpst);
return float16_set_sign(float16_infinity, float16_is_neg(f16));
} else if (float16_abs(f16) < (1 << 8)) {
/* Abs(value) < 2.0^-16 */
float_raise(float_flag_overflow | float_flag_inexact, fpst);
if (round_to_inf(fpst, f16_sign)) {
return float16_set_sign(float16_infinity, f16_sign);
} else {
return float16_set_sign(float16_maxnorm, f16_sign);
}
} else if (f16_exp >= 29 && fpst->flush_to_zero) {
float_raise(float_flag_underflow, fpst);
return float16_set_sign(float16_zero, float16_is_neg(f16));
}
f64_frac = call_recip_estimate(&f16_exp, 29,
((uint64_t) f16_frac) << (52 - 10));
/* result = sign : result_exp<4:0> : fraction<51:42> */
f16_val = deposit32(0, 15, 1, f16_sign);
f16_val = deposit32(f16_val, 10, 5, f16_exp);
f16_val = deposit32(f16_val, 0, 10, extract64(f64_frac, 52 - 10, 10));
return make_float16(f16_val);
}
float32 HELPER(recpe_f32)(float32 input, void *fpstp)
{
float_status *fpst = fpstp;
float32 f32 = float32_squash_input_denormal(input, fpst);
uint32_t f32_val = float32_val(f32);
bool f32_sign = float32_is_neg(f32);
int f32_exp = extract32(f32_val, 23, 8);
uint32_t f32_frac = extract32(f32_val, 0, 23);
uint64_t f64_frac;
if (float32_is_any_nan(f32)) {
float32 nan = f32;
if (float32_is_signaling_nan(f32, fpst)) {
float_raise(float_flag_invalid, fpst);
nan = float32_silence_nan(f32, fpst);
}
if (fpst->default_nan_mode) {
nan = float32_default_nan(fpst);
}
return nan;
} else if (float32_is_infinity(f32)) {
return float32_set_sign(float32_zero, float32_is_neg(f32));
} else if (float32_is_zero(f32)) {
float_raise(float_flag_divbyzero, fpst);
return float32_set_sign(float32_infinity, float32_is_neg(f32));
} else if (float32_abs(f32) < (1ULL << 21)) {
/* Abs(value) < 2.0^-128 */
float_raise(float_flag_overflow | float_flag_inexact, fpst);
if (round_to_inf(fpst, f32_sign)) {
return float32_set_sign(float32_infinity, f32_sign);
} else {
return float32_set_sign(float32_maxnorm, f32_sign);
}
} else if (f32_exp >= 253 && fpst->flush_to_zero) {
float_raise(float_flag_underflow, fpst);
return float32_set_sign(float32_zero, float32_is_neg(f32));
}
f64_frac = call_recip_estimate(&f32_exp, 253,
((uint64_t) f32_frac) << (52 - 23));
/* result = sign : result_exp<7:0> : fraction<51:29> */
f32_val = deposit32(0, 31, 1, f32_sign);
f32_val = deposit32(f32_val, 23, 8, f32_exp);
f32_val = deposit32(f32_val, 0, 23, extract64(f64_frac, 52 - 23, 23));
return make_float32(f32_val);
}
float64 HELPER(recpe_f64)(float64 input, void *fpstp)
{
float_status *fpst = fpstp;
float64 f64 = float64_squash_input_denormal(input, fpst);
uint64_t f64_val = float64_val(f64);
bool f64_sign = float64_is_neg(f64);
int f64_exp = extract64(f64_val, 52, 11);
uint64_t f64_frac = extract64(f64_val, 0, 52);
/* Deal with any special cases */
if (float64_is_any_nan(f64)) {
float64 nan = f64;
if (float64_is_signaling_nan(f64, fpst)) {
float_raise(float_flag_invalid, fpst);
nan = float64_silence_nan(f64, fpst);
}
if (fpst->default_nan_mode) {
nan = float64_default_nan(fpst);
}
return nan;
} else if (float64_is_infinity(f64)) {
return float64_set_sign(float64_zero, float64_is_neg(f64));
} else if (float64_is_zero(f64)) {
float_raise(float_flag_divbyzero, fpst);
return float64_set_sign(float64_infinity, float64_is_neg(f64));
} else if ((f64_val & ~(1ULL << 63)) < (1ULL << 50)) {
/* Abs(value) < 2.0^-1024 */
float_raise(float_flag_overflow | float_flag_inexact, fpst);
if (round_to_inf(fpst, f64_sign)) {
return float64_set_sign(float64_infinity, f64_sign);
} else {
return float64_set_sign(float64_maxnorm, f64_sign);
}
} else if (f64_exp >= 2045 && fpst->flush_to_zero) {
float_raise(float_flag_underflow, fpst);
return float64_set_sign(float64_zero, float64_is_neg(f64));
}
f64_frac = call_recip_estimate(&f64_exp, 2045, f64_frac);
/* result = sign : result_exp<10:0> : fraction<51:0>; */
f64_val = deposit64(0, 63, 1, f64_sign);
f64_val = deposit64(f64_val, 52, 11, f64_exp);
f64_val = deposit64(f64_val, 0, 52, f64_frac);
return make_float64(f64_val);
}
/* The algorithm that must be used to calculate the estimate
* is specified by the ARM ARM.
*/
static int do_recip_sqrt_estimate(int a)
{
int b, estimate;
assert(128 <= a && a < 512);
if (a < 256) {
a = a * 2 + 1;
} else {
a = (a >> 1) << 1;
a = (a + 1) * 2;
}
b = 512;
while (a * (b + 1) * (b + 1) < (1 << 28)) {
b += 1;
}
estimate = (b + 1) / 2;
assert(256 <= estimate && estimate < 512);
return estimate;
}
static uint64_t recip_sqrt_estimate(int *exp , int exp_off, uint64_t frac)
{
int estimate;
uint32_t scaled;
if (*exp == 0) {
while (extract64(frac, 51, 1) == 0) {
frac = frac << 1;
*exp -= 1;
}
frac = extract64(frac, 0, 51) << 1;
}
if (*exp & 1) {
/* scaled = UInt('01':fraction<51:45>) */
scaled = deposit32(1 << 7, 0, 7, extract64(frac, 45, 7));
} else {
/* scaled = UInt('1':fraction<51:44>) */
scaled = deposit32(1 << 8, 0, 8, extract64(frac, 44, 8));
}
estimate = do_recip_sqrt_estimate(scaled);
*exp = (exp_off - *exp) / 2;
return extract64(estimate, 0, 8) << 44;
}
uint32_t HELPER(rsqrte_f16)(uint32_t input, void *fpstp)
{
float_status *s = fpstp;
float16 f16 = float16_squash_input_denormal(input, s);
uint16_t val = float16_val(f16);
bool f16_sign = float16_is_neg(f16);
int f16_exp = extract32(val, 10, 5);
uint16_t f16_frac = extract32(val, 0, 10);
uint64_t f64_frac;
if (float16_is_any_nan(f16)) {
float16 nan = f16;
if (float16_is_signaling_nan(f16, s)) {
float_raise(float_flag_invalid, s);
nan = float16_silence_nan(f16, s);
}
if (s->default_nan_mode) {
nan = float16_default_nan(s);
}
return nan;
} else if (float16_is_zero(f16)) {
float_raise(float_flag_divbyzero, s);
return float16_set_sign(float16_infinity, f16_sign);
} else if (f16_sign) {
float_raise(float_flag_invalid, s);
return float16_default_nan(s);
} else if (float16_is_infinity(f16)) {
return float16_zero;
}
/* Scale and normalize to a double-precision value between 0.25 and 1.0,
* preserving the parity of the exponent. */
f64_frac = ((uint64_t) f16_frac) << (52 - 10);
f64_frac = recip_sqrt_estimate(&f16_exp, 44, f64_frac);
/* result = sign : result_exp<4:0> : estimate<7:0> : Zeros(2) */
val = deposit32(0, 15, 1, f16_sign);
val = deposit32(val, 10, 5, f16_exp);
val = deposit32(val, 2, 8, extract64(f64_frac, 52 - 8, 8));
return make_float16(val);
}
float32 HELPER(rsqrte_f32)(float32 input, void *fpstp)
{
float_status *s = fpstp;
float32 f32 = float32_squash_input_denormal(input, s);
uint32_t val = float32_val(f32);
uint32_t f32_sign = float32_is_neg(f32);
int f32_exp = extract32(val, 23, 8);
uint32_t f32_frac = extract32(val, 0, 23);
uint64_t f64_frac;
if (float32_is_any_nan(f32)) {
float32 nan = f32;
if (float32_is_signaling_nan(f32, s)) {
float_raise(float_flag_invalid, s);
nan = float32_silence_nan(f32, s);
}
if (s->default_nan_mode) {
nan = float32_default_nan(s);
}
return nan;
} else if (float32_is_zero(f32)) {
float_raise(float_flag_divbyzero, s);
return float32_set_sign(float32_infinity, float32_is_neg(f32));
} else if (float32_is_neg(f32)) {
float_raise(float_flag_invalid, s);
return float32_default_nan(s);
} else if (float32_is_infinity(f32)) {
return float32_zero;
}
/* Scale and normalize to a double-precision value between 0.25 and 1.0,
* preserving the parity of the exponent. */
f64_frac = ((uint64_t) f32_frac) << 29;
f64_frac = recip_sqrt_estimate(&f32_exp, 380, f64_frac);
/* result = sign : result_exp<4:0> : estimate<7:0> : Zeros(15) */
val = deposit32(0, 31, 1, f32_sign);
val = deposit32(val, 23, 8, f32_exp);
val = deposit32(val, 15, 8, extract64(f64_frac, 52 - 8, 8));
return make_float32(val);
}
float64 HELPER(rsqrte_f64)(float64 input, void *fpstp)
{
float_status *s = fpstp;
float64 f64 = float64_squash_input_denormal(input, s);
uint64_t val = float64_val(f64);
bool f64_sign = float64_is_neg(f64);
int f64_exp = extract64(val, 52, 11);
uint64_t f64_frac = extract64(val, 0, 52);
if (float64_is_any_nan(f64)) {
float64 nan = f64;
if (float64_is_signaling_nan(f64, s)) {
float_raise(float_flag_invalid, s);
nan = float64_silence_nan(f64, s);
}
if (s->default_nan_mode) {
nan = float64_default_nan(s);
}
return nan;
} else if (float64_is_zero(f64)) {
float_raise(float_flag_divbyzero, s);
return float64_set_sign(float64_infinity, float64_is_neg(f64));
} else if (float64_is_neg(f64)) {
float_raise(float_flag_invalid, s);
return float64_default_nan(s);
} else if (float64_is_infinity(f64)) {
return float64_zero;
}
f64_frac = recip_sqrt_estimate(&f64_exp, 3068, f64_frac);
/* result = sign : result_exp<4:0> : estimate<7:0> : Zeros(44) */
val = deposit64(0, 61, 1, f64_sign);
val = deposit64(val, 52, 11, f64_exp);
val = deposit64(val, 44, 8, extract64(f64_frac, 52 - 8, 8));
return make_float64(val);
}
uint32_t HELPER(recpe_u32)(uint32_t a, void *fpstp)
{
/* float_status *s = fpstp; */
int input, estimate;
if ((a & 0x80000000) == 0) {
return 0xffffffff;
}
input = extract32(a, 23, 9);
estimate = recip_estimate(input);
return deposit32(0, (32 - 9), 9, estimate);
}
uint32_t HELPER(rsqrte_u32)(uint32_t a, void *fpstp)
{
int estimate;
if ((a & 0xc0000000) == 0) {
return 0xffffffff;
}
estimate = do_recip_sqrt_estimate(extract32(a, 23, 9));
return deposit32(0, 23, 9, estimate);
}
/* VFPv4 fused multiply-accumulate */
float32 VFP_HELPER(muladd, s)(float32 a, float32 b, float32 c, void *fpstp)
{
float_status *fpst = fpstp;
return float32_muladd(a, b, c, 0, fpst);
}
float64 VFP_HELPER(muladd, d)(float64 a, float64 b, float64 c, void *fpstp)
{
float_status *fpst = fpstp;
return float64_muladd(a, b, c, 0, fpst);
}
/* ARMv8 round to integral */
float32 HELPER(rints_exact)(float32 x, void *fp_status)
{
return float32_round_to_int(x, fp_status);
}
float64 HELPER(rintd_exact)(float64 x, void *fp_status)
{
return float64_round_to_int(x, fp_status);
}
float32 HELPER(rints)(float32 x, void *fp_status)
{
int old_flags = get_float_exception_flags(fp_status), new_flags;
float32 ret;
ret = float32_round_to_int(x, fp_status);
/* Suppress any inexact exceptions the conversion produced */
if (!(old_flags & float_flag_inexact)) {
new_flags = get_float_exception_flags(fp_status);
set_float_exception_flags(new_flags & ~float_flag_inexact, fp_status);
}
return ret;
}
float64 HELPER(rintd)(float64 x, void *fp_status)
{
int old_flags = get_float_exception_flags(fp_status), new_flags;
float64 ret;
ret = float64_round_to_int(x, fp_status);
new_flags = get_float_exception_flags(fp_status);
/* Suppress any inexact exceptions the conversion produced */
if (!(old_flags & float_flag_inexact)) {
new_flags = get_float_exception_flags(fp_status);
set_float_exception_flags(new_flags & ~float_flag_inexact, fp_status);
}
return ret;
}
/* Convert ARM rounding mode to softfloat */
int arm_rmode_to_sf(int rmode)
{
switch (rmode) {
case FPROUNDING_TIEAWAY:
rmode = float_round_ties_away;
break;
case FPROUNDING_ODD:
/* FIXME: add support for TIEAWAY and ODD */
qemu_log_mask(LOG_UNIMP, "arm: unimplemented rounding mode: %d\n",
rmode);
case FPROUNDING_TIEEVEN:
default:
rmode = float_round_nearest_even;
break;
case FPROUNDING_POSINF:
rmode = float_round_up;
break;
case FPROUNDING_NEGINF:
rmode = float_round_down;
break;
case FPROUNDING_ZERO:
rmode = float_round_to_zero;
break;
}
return rmode;
}
/* CRC helpers.
* The upper bytes of val (above the number specified by 'bytes') must have
* been zeroed out by the caller.
*/
uint32_t HELPER(crc32)(uint32_t acc, uint32_t val, uint32_t bytes)
{
uint8_t buf[4];
stl_le_p(buf, val);
/* zlib crc32 converts the accumulator and output to one's complement. */
return crc32(acc ^ 0xffffffff, buf, bytes) ^ 0xffffffff;
}
uint32_t HELPER(crc32c)(uint32_t acc, uint32_t val, uint32_t bytes)
{
uint8_t buf[4];
stl_le_p(buf, val);
/* Linux crc32c converts the output to one's complement. */
return crc32c(acc, buf, bytes) ^ 0xffffffff;
}
/* Return the exception level to which FP-disabled exceptions should
* be taken, or 0 if FP is enabled.
*/
static inline int fp_exception_el(CPUARMState *env)
{
#ifndef CONFIG_USER_ONLY
int fpen;
int cur_el = arm_current_el(env);
/* CPACR and the CPTR registers don't exist before v6, so FP is
* always accessible
*/
if (!arm_feature(env, ARM_FEATURE_V6)) {
return 0;
}
/* The CPACR controls traps to EL1, or PL1 if we're 32 bit:
* 0, 2 : trap EL0 and EL1/PL1 accesses
* 1 : trap only EL0 accesses
* 3 : trap no accesses
*/
fpen = extract32(env->cp15.cpacr_el1, 20, 2);
switch (fpen) {
case 0:
case 2:
if (cur_el == 0 || cur_el == 1) {
/* Trap to PL1, which might be EL1 or EL3 */
if (arm_is_secure(env) && !arm_el_is_aa64(env, 3)) {
return 3;
}
return 1;
}
if (cur_el == 3 && !is_a64(env)) {
/* Secure PL1 running at EL3 */
return 3;
}
break;
case 1:
if (cur_el == 0) {
return 1;
}
break;
case 3:
break;
}
/* For the CPTR registers we don't need to guard with an ARM_FEATURE
* check because zero bits in the registers mean "don't trap".
*/
/* CPTR_EL2 : present in v7VE or v8 */
if (cur_el <= 2 && extract32(env->cp15.cptr_el[2], 10, 1)
&& !arm_is_secure_below_el3(env)) {
/* Trap FP ops at EL2, NS-EL1 or NS-EL0 to EL2 */
return 2;
}
/* CPTR_EL3 : present in v8 */
if (extract32(env->cp15.cptr_el[3], 10, 1)) {
/* Trap all FP ops to EL3 */
return 3;
}
#endif
return 0;
}
void cpu_get_tb_cpu_state(CPUARMState *env, target_ulong *pc,
target_ulong *cs_base, uint32_t *pflags)
{
ARMMMUIdx mmu_idx = core_to_arm_mmu_idx(env, cpu_mmu_index(env, false));
int fp_el = fp_exception_el(env);
uint32_t flags;
if (is_a64(env)) {
int sve_el = sve_exception_el(env);
uint32_t zcr_len;
*pc = env->pc;
flags = ARM_TBFLAG_AARCH64_STATE_MASK;
/* Get control bits for tagged addresses */
flags |= (arm_regime_tbi0(env, mmu_idx) << ARM_TBFLAG_TBI0_SHIFT);
flags |= (arm_regime_tbi1(env, mmu_idx) << ARM_TBFLAG_TBI1_SHIFT);
flags |= sve_el << ARM_TBFLAG_SVEEXC_EL_SHIFT;
/* If SVE is disabled, but FP is enabled,
then the effective len is 0. */
if (sve_el != 0 && fp_el == 0) {
zcr_len = 0;
} else {
int current_el = arm_current_el(env);
zcr_len = env->vfp.zcr_el[current_el <= 1 ? 1 : current_el];
zcr_len &= 0xf;
if (current_el < 2 && arm_feature(env, ARM_FEATURE_EL2)) {
zcr_len = MIN(zcr_len, 0xf & (uint32_t)env->vfp.zcr_el[2]);
}
if (current_el < 3 && arm_feature(env, ARM_FEATURE_EL3)) {
zcr_len = MIN(zcr_len, 0xf & (uint32_t)env->vfp.zcr_el[3]);
}
}
flags |= zcr_len << ARM_TBFLAG_ZCR_LEN_SHIFT;
} else {
*pc = env->regs[15];
flags = (env->thumb << ARM_TBFLAG_THUMB_SHIFT)
| (env->vfp.vec_len << ARM_TBFLAG_VECLEN_SHIFT)
| (env->vfp.vec_stride << ARM_TBFLAG_VECSTRIDE_SHIFT)
| (env->condexec_bits << ARM_TBFLAG_CONDEXEC_SHIFT)
| (arm_sctlr_b(env) << ARM_TBFLAG_SCTLR_B_SHIFT);
if (!(access_secure_reg(env))) {
flags |= ARM_TBFLAG_NS_MASK;
}
if (env->vfp.xregs[ARM_VFP_FPEXC] & (1 << 30)
|| arm_el_is_aa64(env, 1)) {
flags |= ARM_TBFLAG_VFPEN_MASK;
}
flags |= (extract32(env->cp15.c15_cpar, 0, 2)
<< ARM_TBFLAG_XSCALE_CPAR_SHIFT);
}
flags |= (arm_to_core_mmu_idx(mmu_idx) << ARM_TBFLAG_MMUIDX_SHIFT);
/* The SS_ACTIVE and PSTATE_SS bits correspond to the state machine
* states defined in the ARM ARM for software singlestep:
* SS_ACTIVE PSTATE.SS State
* 0 x Inactive (the TB flag for SS is always 0)
* 1 0 Active-pending
* 1 1 Active-not-pending
*/
if (arm_singlestep_active(env)) {
flags |= ARM_TBFLAG_SS_ACTIVE_MASK;
if (is_a64(env)) {
if (env->pstate & PSTATE_SS) {
flags |= ARM_TBFLAG_PSTATE_SS_MASK;
}
} else {
if (env->uncached_cpsr & PSTATE_SS) {
flags |= ARM_TBFLAG_PSTATE_SS_MASK;
}
}
}
if (arm_cpu_data_is_big_endian(env)) {
flags |= ARM_TBFLAG_BE_DATA_MASK;
}
flags |= fp_el << ARM_TBFLAG_FPEXC_EL_SHIFT;
if (arm_v7m_is_handler_mode(env)) {
flags |= ARM_TBFLAG_HANDLER_MASK;
}
*pflags = flags;
*cs_base = 0;
}