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qemu / qemu / b039c9611331ccf61a53b2d26d80a8cfb596e0ce / . / target / riscv / cpu.h
blob: c3a03f878bab419003bbd724648a7cb1cad9eac0 [file] [log] [blame]
/*
* QEMU RISC-V CPU
*
* Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
* Copyright (c) 2017-2018 SiFive, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef RISCV_CPU_H
#define RISCV_CPU_H
#include "hw/core/cpu.h"
#include "hw/registerfields.h"
#include "hw/qdev-properties.h"
#include "exec/cpu-defs.h"
#include "exec/gdbstub.h"
#include "qemu/cpu-float.h"
#include "qom/object.h"
#include "qemu/int128.h"
#include "cpu_bits.h"
#include "cpu_cfg.h"
#include "qapi/qapi-types-common.h"
#include "cpu-qom.h"
typedef struct CPUArchState CPURISCVState;
#define CPU_RESOLVING_TYPE TYPE_RISCV_CPU
#if defined(TARGET_RISCV32)
# define TYPE_RISCV_CPU_BASE TYPE_RISCV_CPU_BASE32
#elif defined(TARGET_RISCV64)
# define TYPE_RISCV_CPU_BASE TYPE_RISCV_CPU_BASE64
#endif
/*
* RISC-V-specific extra insn start words:
* 1: Original instruction opcode
*/
#define TARGET_INSN_START_EXTRA_WORDS 1
#define RV(x) ((target_ulong)1 << (x - 'A'))
/*
* Update misa_bits[], misa_ext_info_arr[] and misa_ext_cfgs[]
* when adding new MISA bits here.
*/
#define RVI RV('I')
#define RVE RV('E') /* E and I are mutually exclusive */
#define RVM RV('M')
#define RVA RV('A')
#define RVF RV('F')
#define RVD RV('D')
#define RVV RV('V')
#define RVC RV('C')
#define RVS RV('S')
#define RVU RV('U')
#define RVH RV('H')
#define RVJ RV('J')
#define RVG RV('G')
#define RVB RV('B')
extern const uint32_t misa_bits[];
const char *riscv_get_misa_ext_name(uint32_t bit);
const char *riscv_get_misa_ext_description(uint32_t bit);
#define CPU_CFG_OFFSET(_prop) offsetof(struct RISCVCPUConfig, _prop)
typedef struct riscv_cpu_profile {
struct riscv_cpu_profile *parent;
const char *name;
uint32_t misa_ext;
bool enabled;
bool user_set;
int priv_spec;
int satp_mode;
const int32_t ext_offsets[];
} RISCVCPUProfile;
#define RISCV_PROFILE_EXT_LIST_END -1
#define RISCV_PROFILE_ATTR_UNUSED -1
extern RISCVCPUProfile *riscv_profiles[];
/* Privileged specification version */
#define PRIV_VER_1_10_0_STR "v1.10.0"
#define PRIV_VER_1_11_0_STR "v1.11.0"
#define PRIV_VER_1_12_0_STR "v1.12.0"
#define PRIV_VER_1_13_0_STR "v1.13.0"
enum {
PRIV_VERSION_1_10_0 = 0,
PRIV_VERSION_1_11_0,
PRIV_VERSION_1_12_0,
PRIV_VERSION_1_13_0,
PRIV_VERSION_LATEST = PRIV_VERSION_1_13_0,
};
#define VEXT_VERSION_1_00_0 0x00010000
#define VEXT_VER_1_00_0_STR "v1.0"
enum {
TRANSLATE_SUCCESS,
TRANSLATE_FAIL,
TRANSLATE_PMP_FAIL,
TRANSLATE_G_STAGE_FAIL
};
/* Extension context status */
typedef enum {
EXT_STATUS_DISABLED = 0,
EXT_STATUS_INITIAL,
EXT_STATUS_CLEAN,
EXT_STATUS_DIRTY,
} RISCVExtStatus;
typedef struct riscv_cpu_implied_exts_rule {
#ifndef CONFIG_USER_ONLY
/*
* Bitmask indicates the rule enabled status for the harts.
* This enhancement is only available in system-mode QEMU,
* as we don't have a good way (e.g. mhartid) to distinguish
* the SMP cores in user-mode QEMU.
*/
unsigned long *enabled;
#endif
/* True if this is a MISA implied rule. */
bool is_misa;
/* ext is MISA bit if is_misa flag is true, else multi extension offset. */
const uint32_t ext;
const uint32_t implied_misa_exts;
const uint32_t implied_multi_exts[];
} RISCVCPUImpliedExtsRule;
extern RISCVCPUImpliedExtsRule *riscv_misa_ext_implied_rules[];
extern RISCVCPUImpliedExtsRule *riscv_multi_ext_implied_rules[];
#define RISCV_IMPLIED_EXTS_RULE_END -1
#define MMU_USER_IDX 3
#define MAX_RISCV_PMPS (16)
#if !defined(CONFIG_USER_ONLY)
#include "pmp.h"
#include "debug.h"
#endif
#define RV_VLEN_MAX 1024
#define RV_MAX_MHPMEVENTS 32
#define RV_MAX_MHPMCOUNTERS 32
FIELD(VTYPE, VLMUL, 0, 3)
FIELD(VTYPE, VSEW, 3, 3)
FIELD(VTYPE, VTA, 6, 1)
FIELD(VTYPE, VMA, 7, 1)
FIELD(VTYPE, VEDIV, 8, 2)
FIELD(VTYPE, RESERVED, 10, sizeof(target_ulong) * 8 - 11)
typedef struct PMUCTRState {
/* Current value of a counter */
target_ulong mhpmcounter_val;
/* Current value of a counter in RV32 */
target_ulong mhpmcounterh_val;
/* Snapshot values of counter */
target_ulong mhpmcounter_prev;
/* Snapshort value of a counter in RV32 */
target_ulong mhpmcounterh_prev;
/* Value beyond UINT32_MAX/UINT64_MAX before overflow interrupt trigger */
target_ulong irq_overflow_left;
} PMUCTRState;
typedef struct PMUFixedCtrState {
/* Track cycle and icount for each privilege mode */
uint64_t counter[4];
uint64_t counter_prev[4];
/* Track cycle and icount for each privilege mode when V = 1*/
uint64_t counter_virt[2];
uint64_t counter_virt_prev[2];
} PMUFixedCtrState;
struct CPUArchState {
target_ulong gpr[32];
target_ulong gprh[32]; /* 64 top bits of the 128-bit registers */
/* vector coprocessor state. */
uint64_t vreg[32 * RV_VLEN_MAX / 64] QEMU_ALIGNED(16);
target_ulong vxrm;
target_ulong vxsat;
target_ulong vl;
target_ulong vstart;
target_ulong vtype;
bool vill;
target_ulong pc;
target_ulong load_res;
target_ulong load_val;
/* Floating-Point state */
uint64_t fpr[32]; /* assume both F and D extensions */
target_ulong frm;
float_status fp_status;
target_ulong badaddr;
target_ulong bins;
target_ulong guest_phys_fault_addr;
target_ulong priv_ver;
target_ulong vext_ver;
/* RISCVMXL, but uint32_t for vmstate migration */
uint32_t misa_mxl; /* current mxl */
uint32_t misa_ext; /* current extensions */
uint32_t misa_ext_mask; /* max ext for this cpu */
uint32_t xl; /* current xlen */
/* 128-bit helpers upper part return value */
target_ulong retxh;
target_ulong jvt;
/* elp state for zicfilp extension */
bool elp;
/* sw check code for sw check exception */
target_ulong sw_check_code;
#ifdef CONFIG_USER_ONLY
uint32_t elf_flags;
#endif
target_ulong priv;
/* CSRs for execution environment configuration */
uint64_t menvcfg;
target_ulong senvcfg;
#ifndef CONFIG_USER_ONLY
/* This contains QEMU specific information about the virt state. */
bool virt_enabled;
target_ulong geilen;
uint64_t resetvec;
target_ulong mhartid;
/*
* For RV32 this is 32-bit mstatus and 32-bit mstatush.
* For RV64 this is a 64-bit mstatus.
*/
uint64_t mstatus;
uint64_t mip;
/*
* MIP contains the software writable version of SEIP ORed with the
* external interrupt value. The MIP register is always up-to-date.
* To keep track of the current source, we also save booleans of the values
* here.
*/
bool external_seip;
bool software_seip;
uint64_t miclaim;
uint64_t mie;
uint64_t mideleg;
/*
* When mideleg[i]=0 and mvien[i]=1, sie[i] is no more
* alias of mie[i] and needs to be maintained separately.
*/
uint64_t sie;
/*
* When hideleg[i]=0 and hvien[i]=1, vsie[i] is no more
* alias of sie[i] (mie[i]) and needs to be maintained separately.
*/
uint64_t vsie;
target_ulong satp; /* since: priv-1.10.0 */
target_ulong stval;
target_ulong medeleg;
target_ulong stvec;
target_ulong sepc;
target_ulong scause;
target_ulong mtvec;
target_ulong mepc;
target_ulong mcause;
target_ulong mtval; /* since: priv-1.10.0 */
/* Machine and Supervisor interrupt priorities */
uint8_t miprio[64];
uint8_t siprio[64];
/* AIA CSRs */
target_ulong miselect;
target_ulong siselect;
uint64_t mvien;
uint64_t mvip;
/* Hypervisor CSRs */
target_ulong hstatus;
target_ulong hedeleg;
uint64_t hideleg;
uint32_t hcounteren;
target_ulong htval;
target_ulong htinst;
target_ulong hgatp;
target_ulong hgeie;
target_ulong hgeip;
uint64_t htimedelta;
uint64_t hvien;
/*
* Bits VSSIP, VSTIP and VSEIP in hvip are maintained in mip. Other bits
* from 0:12 are reserved. Bits 13:63 are not aliased and must be separately
* maintain in hvip.
*/
uint64_t hvip;
/* Hypervisor controlled virtual interrupt priorities */
target_ulong hvictl;
uint8_t hviprio[64];
/* Upper 64-bits of 128-bit CSRs */
uint64_t mscratchh;
uint64_t sscratchh;
/* Virtual CSRs */
/*
* For RV32 this is 32-bit vsstatus and 32-bit vsstatush.
* For RV64 this is a 64-bit vsstatus.
*/
uint64_t vsstatus;
target_ulong vstvec;
target_ulong vsscratch;
target_ulong vsepc;
target_ulong vscause;
target_ulong vstval;
target_ulong vsatp;
/* AIA VS-mode CSRs */
target_ulong vsiselect;
target_ulong mtval2;
target_ulong mtinst;
/* HS Backup CSRs */
target_ulong stvec_hs;
target_ulong sscratch_hs;
target_ulong sepc_hs;
target_ulong scause_hs;
target_ulong stval_hs;
target_ulong satp_hs;
uint64_t mstatus_hs;
/*
* Signals whether the current exception occurred with two-stage address
* translation active.
*/
bool two_stage_lookup;
/*
* Signals whether the current exception occurred while doing two-stage
* address translation for the VS-stage page table walk.
*/
bool two_stage_indirect_lookup;
uint32_t scounteren;
uint32_t mcounteren;
uint32_t mcountinhibit;
/* PMU cycle & instret privilege mode filtering */
target_ulong mcyclecfg;
target_ulong mcyclecfgh;
target_ulong minstretcfg;
target_ulong minstretcfgh;
/* PMU counter state */
PMUCTRState pmu_ctrs[RV_MAX_MHPMCOUNTERS];
/* PMU event selector configured values. First three are unused */
target_ulong mhpmevent_val[RV_MAX_MHPMEVENTS];
/* PMU event selector configured values for RV32 */
target_ulong mhpmeventh_val[RV_MAX_MHPMEVENTS];
PMUFixedCtrState pmu_fixed_ctrs[2];
target_ulong sscratch;
target_ulong mscratch;
/* Sstc CSRs */
uint64_t stimecmp;
uint64_t vstimecmp;
/* physical memory protection */
pmp_table_t pmp_state;
target_ulong mseccfg;
/* trigger module */
target_ulong trigger_cur;
target_ulong tdata1[RV_MAX_TRIGGERS];
target_ulong tdata2[RV_MAX_TRIGGERS];
target_ulong tdata3[RV_MAX_TRIGGERS];
target_ulong mcontext;
struct CPUBreakpoint *cpu_breakpoint[RV_MAX_TRIGGERS];
struct CPUWatchpoint *cpu_watchpoint[RV_MAX_TRIGGERS];
QEMUTimer *itrigger_timer[RV_MAX_TRIGGERS];
int64_t last_icount;
bool itrigger_enabled;
/* machine specific rdtime callback */
uint64_t (*rdtime_fn)(void *);
void *rdtime_fn_arg;
/* machine specific AIA ireg read-modify-write callback */
#define AIA_MAKE_IREG(__isel, __priv, __virt, __vgein, __xlen) \
((((__xlen) & 0xff) << 24) | \
(((__vgein) & 0x3f) << 20) | \
(((__virt) & 0x1) << 18) | \
(((__priv) & 0x3) << 16) | \
(__isel & 0xffff))
#define AIA_IREG_ISEL(__ireg) ((__ireg) & 0xffff)
#define AIA_IREG_PRIV(__ireg) (((__ireg) >> 16) & 0x3)
#define AIA_IREG_VIRT(__ireg) (((__ireg) >> 18) & 0x1)
#define AIA_IREG_VGEIN(__ireg) (((__ireg) >> 20) & 0x3f)
#define AIA_IREG_XLEN(__ireg) (((__ireg) >> 24) & 0xff)
int (*aia_ireg_rmw_fn[4])(void *arg, target_ulong reg,
target_ulong *val, target_ulong new_val, target_ulong write_mask);
void *aia_ireg_rmw_fn_arg[4];
/* True if in debugger mode. */
bool debugger;
/*
* CSRs for PointerMasking extension
*/
target_ulong mmte;
target_ulong mpmmask;
target_ulong mpmbase;
target_ulong spmmask;
target_ulong spmbase;
target_ulong upmmask;
target_ulong upmbase;
uint64_t mstateen[SMSTATEEN_MAX_COUNT];
uint64_t hstateen[SMSTATEEN_MAX_COUNT];
uint64_t sstateen[SMSTATEEN_MAX_COUNT];
uint64_t henvcfg;
#endif
target_ulong cur_pmmask;
target_ulong cur_pmbase;
/* Fields from here on are preserved across CPU reset. */
QEMUTimer *stimer; /* Internal timer for S-mode interrupt */
QEMUTimer *vstimer; /* Internal timer for VS-mode interrupt */
bool vstime_irq;
hwaddr kernel_addr;
hwaddr fdt_addr;
#ifdef CONFIG_KVM
/* kvm timer */
bool kvm_timer_dirty;
uint64_t kvm_timer_time;
uint64_t kvm_timer_compare;
uint64_t kvm_timer_state;
uint64_t kvm_timer_frequency;
#endif /* CONFIG_KVM */
};
/*
* RISCVCPU:
* @env: #CPURISCVState
*
* A RISCV CPU.
*/
struct ArchCPU {
CPUState parent_obj;
CPURISCVState env;
GDBFeature dyn_csr_feature;
GDBFeature dyn_vreg_feature;
/* Configuration Settings */
RISCVCPUConfig cfg;
QEMUTimer *pmu_timer;
/* A bitmask of Available programmable counters */
uint32_t pmu_avail_ctrs;
/* Mapping of events to counters */
GHashTable *pmu_event_ctr_map;
const GPtrArray *decoders;
};
/**
* RISCVCPUClass:
* @parent_realize: The parent class' realize handler.
* @parent_phases: The parent class' reset phase handlers.
*
* A RISCV CPU model.
*/
struct RISCVCPUClass {
CPUClass parent_class;
DeviceRealize parent_realize;
ResettablePhases parent_phases;
uint32_t misa_mxl_max; /* max mxl for this cpu */
};
static inline int riscv_has_ext(CPURISCVState *env, target_ulong ext)
{
return (env->misa_ext & ext) != 0;
}
#include "cpu_user.h"
extern const char * const riscv_int_regnames[];
extern const char * const riscv_int_regnamesh[];
extern const char * const riscv_fpr_regnames[];
const char *riscv_cpu_get_trap_name(target_ulong cause, bool async);
int riscv_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
int cpuid, DumpState *s);
int riscv_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs,
int cpuid, DumpState *s);
int riscv_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg);
int riscv_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
int riscv_cpu_hviprio_index2irq(int index, int *out_irq, int *out_rdzero);
uint8_t riscv_cpu_default_priority(int irq);
uint64_t riscv_cpu_all_pending(CPURISCVState *env);
int riscv_cpu_mirq_pending(CPURISCVState *env);
int riscv_cpu_sirq_pending(CPURISCVState *env);
int riscv_cpu_vsirq_pending(CPURISCVState *env);
bool riscv_cpu_fp_enabled(CPURISCVState *env);
target_ulong riscv_cpu_get_geilen(CPURISCVState *env);
void riscv_cpu_set_geilen(CPURISCVState *env, target_ulong geilen);
bool riscv_cpu_vector_enabled(CPURISCVState *env);
void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable);
int riscv_env_mmu_index(CPURISCVState *env, bool ifetch);
bool cpu_get_fcfien(CPURISCVState *env);
G_NORETURN void riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
MMUAccessType access_type,
int mmu_idx, uintptr_t retaddr);
bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
MMUAccessType access_type, int mmu_idx,
bool probe, uintptr_t retaddr);
char *riscv_isa_string(RISCVCPU *cpu);
int riscv_cpu_max_xlen(RISCVCPUClass *mcc);
bool riscv_cpu_option_set(const char *optname);
#ifndef CONFIG_USER_ONLY
void riscv_cpu_do_interrupt(CPUState *cpu);
void riscv_isa_write_fdt(RISCVCPU *cpu, void *fdt, char *nodename);
void riscv_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr,
vaddr addr, unsigned size,
MMUAccessType access_type,
int mmu_idx, MemTxAttrs attrs,
MemTxResult response, uintptr_t retaddr);
hwaddr riscv_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
bool riscv_cpu_exec_interrupt(CPUState *cs, int interrupt_request);
void riscv_cpu_swap_hypervisor_regs(CPURISCVState *env);
int riscv_cpu_claim_interrupts(RISCVCPU *cpu, uint64_t interrupts);
uint64_t riscv_cpu_update_mip(CPURISCVState *env, uint64_t mask,
uint64_t value);
void riscv_cpu_interrupt(CPURISCVState *env);
#define BOOL_TO_MASK(x) (-!!(x)) /* helper for riscv_cpu_update_mip value */
void riscv_cpu_set_rdtime_fn(CPURISCVState *env, uint64_t (*fn)(void *),
void *arg);
void riscv_cpu_set_aia_ireg_rmw_fn(CPURISCVState *env, uint32_t priv,
int (*rmw_fn)(void *arg,
target_ulong reg,
target_ulong *val,
target_ulong new_val,
target_ulong write_mask),
void *rmw_fn_arg);
RISCVException smstateen_acc_ok(CPURISCVState *env, int index, uint64_t bit);
#endif /* !CONFIG_USER_ONLY */
void riscv_cpu_set_mode(CPURISCVState *env, target_ulong newpriv, bool virt_en);
void riscv_translate_init(void);
G_NORETURN void riscv_raise_exception(CPURISCVState *env,
uint32_t exception, uintptr_t pc);
target_ulong riscv_cpu_get_fflags(CPURISCVState *env);
void riscv_cpu_set_fflags(CPURISCVState *env, target_ulong);
#include "exec/cpu-all.h"
FIELD(TB_FLAGS, MEM_IDX, 0, 3)
FIELD(TB_FLAGS, FS, 3, 2)
/* Vector flags */
FIELD(TB_FLAGS, VS, 5, 2)
FIELD(TB_FLAGS, LMUL, 7, 3)
FIELD(TB_FLAGS, SEW, 10, 3)
FIELD(TB_FLAGS, VL_EQ_VLMAX, 13, 1)
FIELD(TB_FLAGS, VILL, 14, 1)
FIELD(TB_FLAGS, VSTART_EQ_ZERO, 15, 1)
/* The combination of MXL/SXL/UXL that applies to the current cpu mode. */
FIELD(TB_FLAGS, XL, 16, 2)
/* If PointerMasking should be applied */
FIELD(TB_FLAGS, PM_MASK_ENABLED, 18, 1)
FIELD(TB_FLAGS, PM_BASE_ENABLED, 19, 1)
FIELD(TB_FLAGS, VTA, 20, 1)
FIELD(TB_FLAGS, VMA, 21, 1)
/* Native debug itrigger */
FIELD(TB_FLAGS, ITRIGGER, 22, 1)
/* Virtual mode enabled */
FIELD(TB_FLAGS, VIRT_ENABLED, 23, 1)
FIELD(TB_FLAGS, PRIV, 24, 2)
FIELD(TB_FLAGS, AXL, 26, 2)
/* zicfilp needs a TB flag to track indirect branches */
FIELD(TB_FLAGS, FCFI_ENABLED, 28, 1)
FIELD(TB_FLAGS, FCFI_LP_EXPECTED, 29, 1)
#ifdef TARGET_RISCV32
#define riscv_cpu_mxl(env) ((void)(env), MXL_RV32)
#else
static inline RISCVMXL riscv_cpu_mxl(CPURISCVState *env)
{
return env->misa_mxl;
}
#endif
#define riscv_cpu_mxl_bits(env) (1UL << (4 + riscv_cpu_mxl(env)))
static inline const RISCVCPUConfig *riscv_cpu_cfg(CPURISCVState *env)
{
return &env_archcpu(env)->cfg;
}
#if !defined(CONFIG_USER_ONLY)
static inline int cpu_address_mode(CPURISCVState *env)
{
int mode = env->priv;
if (mode == PRV_M && get_field(env->mstatus, MSTATUS_MPRV)) {
mode = get_field(env->mstatus, MSTATUS_MPP);
}
return mode;
}
static inline RISCVMXL cpu_get_xl(CPURISCVState *env, target_ulong mode)
{
RISCVMXL xl = env->misa_mxl;
/*
* When emulating a 32-bit-only cpu, use RV32.
* When emulating a 64-bit cpu, and MXL has been reduced to RV32,
* MSTATUSH doesn't have UXL/SXL, therefore XLEN cannot be widened
* back to RV64 for lower privs.
*/
if (xl != MXL_RV32) {
switch (mode) {
case PRV_M:
break;
case PRV_U:
xl = get_field(env->mstatus, MSTATUS64_UXL);
break;
default: /* PRV_S */
xl = get_field(env->mstatus, MSTATUS64_SXL);
break;
}
}
return xl;
}
#endif
#if defined(TARGET_RISCV32)
#define cpu_recompute_xl(env) ((void)(env), MXL_RV32)
#else
static inline RISCVMXL cpu_recompute_xl(CPURISCVState *env)
{
#if !defined(CONFIG_USER_ONLY)
return cpu_get_xl(env, env->priv);
#else
return env->misa_mxl;
#endif
}
#endif
#if defined(TARGET_RISCV32)
#define cpu_address_xl(env) ((void)(env), MXL_RV32)
#else
static inline RISCVMXL cpu_address_xl(CPURISCVState *env)
{
#ifdef CONFIG_USER_ONLY
return env->xl;
#else
int mode = cpu_address_mode(env);
return cpu_get_xl(env, mode);
#endif
}
#endif
static inline int riscv_cpu_xlen(CPURISCVState *env)
{
return 16 << env->xl;
}
#ifdef TARGET_RISCV32
#define riscv_cpu_sxl(env) ((void)(env), MXL_RV32)
#else
static inline RISCVMXL riscv_cpu_sxl(CPURISCVState *env)
{
#ifdef CONFIG_USER_ONLY
return env->misa_mxl;
#else
if (env->misa_mxl != MXL_RV32) {
return get_field(env->mstatus, MSTATUS64_SXL);
}
#endif
return MXL_RV32;
}
#endif
/*
* Encode LMUL to lmul as follows:
* LMUL vlmul lmul
* 1 000 0
* 2 001 1
* 4 010 2
* 8 011 3
* - 100 -
* 1/8 101 -3
* 1/4 110 -2
* 1/2 111 -1
*
* then, we can calculate VLMAX = vlen >> (vsew + 3 - lmul)
* e.g. vlen = 256 bits, SEW = 16, LMUL = 1/8
* => VLMAX = vlen >> (1 + 3 - (-3))
* = 256 >> 7
* = 2
*/
static inline uint32_t vext_get_vlmax(uint32_t vlenb, uint32_t vsew,
int8_t lmul)
{
uint32_t vlen = vlenb << 3;
/*
* We need to use 'vlen' instead of 'vlenb' to
* preserve the '+ 3' in the formula. Otherwise
* we risk a negative shift if vsew < lmul.
*/
return vlen >> (vsew + 3 - lmul);
}
void cpu_get_tb_cpu_state(CPURISCVState *env, vaddr *pc,
uint64_t *cs_base, uint32_t *pflags);
void riscv_cpu_update_mask(CPURISCVState *env);
bool riscv_cpu_is_32bit(RISCVCPU *cpu);
RISCVException riscv_csrr(CPURISCVState *env, int csrno,
target_ulong *ret_value);
RISCVException riscv_csrrw(CPURISCVState *env, int csrno,
target_ulong *ret_value,
target_ulong new_value, target_ulong write_mask);
RISCVException riscv_csrrw_debug(CPURISCVState *env, int csrno,
target_ulong *ret_value,
target_ulong new_value,
target_ulong write_mask);
static inline void riscv_csr_write(CPURISCVState *env, int csrno,
target_ulong val)
{
riscv_csrrw(env, csrno, NULL, val, MAKE_64BIT_MASK(0, TARGET_LONG_BITS));
}
static inline target_ulong riscv_csr_read(CPURISCVState *env, int csrno)
{
target_ulong val = 0;
riscv_csrrw(env, csrno, &val, 0, 0);
return val;
}
typedef RISCVException (*riscv_csr_predicate_fn)(CPURISCVState *env,
int csrno);
typedef RISCVException (*riscv_csr_read_fn)(CPURISCVState *env, int csrno,
target_ulong *ret_value);
typedef RISCVException (*riscv_csr_write_fn)(CPURISCVState *env, int csrno,
target_ulong new_value);
typedef RISCVException (*riscv_csr_op_fn)(CPURISCVState *env, int csrno,
target_ulong *ret_value,
target_ulong new_value,
target_ulong write_mask);
RISCVException riscv_csrr_i128(CPURISCVState *env, int csrno,
Int128 *ret_value);
RISCVException riscv_csrrw_i128(CPURISCVState *env, int csrno,
Int128 *ret_value,
Int128 new_value, Int128 write_mask);
typedef RISCVException (*riscv_csr_read128_fn)(CPURISCVState *env, int csrno,
Int128 *ret_value);
typedef RISCVException (*riscv_csr_write128_fn)(CPURISCVState *env, int csrno,
Int128 new_value);
typedef struct {
const char *name;
riscv_csr_predicate_fn predicate;
riscv_csr_read_fn read;
riscv_csr_write_fn write;
riscv_csr_op_fn op;
riscv_csr_read128_fn read128;
riscv_csr_write128_fn write128;
/* The default priv spec version should be PRIV_VERSION_1_10_0 (i.e 0) */
uint32_t min_priv_ver;
} riscv_csr_operations;
/* CSR function table constants */
enum {
CSR_TABLE_SIZE = 0x1000
};
/*
* The event id are encoded based on the encoding specified in the
* SBI specification v0.3
*/
enum riscv_pmu_event_idx {
RISCV_PMU_EVENT_HW_CPU_CYCLES = 0x01,
RISCV_PMU_EVENT_HW_INSTRUCTIONS = 0x02,
RISCV_PMU_EVENT_CACHE_DTLB_READ_MISS = 0x10019,
RISCV_PMU_EVENT_CACHE_DTLB_WRITE_MISS = 0x1001B,
RISCV_PMU_EVENT_CACHE_ITLB_PREFETCH_MISS = 0x10021,
};
/* used by tcg/tcg-cpu.c*/
void isa_ext_update_enabled(RISCVCPU *cpu, uint32_t ext_offset, bool en);
bool isa_ext_is_enabled(RISCVCPU *cpu, uint32_t ext_offset);
void riscv_cpu_set_misa_ext(CPURISCVState *env, uint32_t ext);
bool riscv_cpu_is_vendor(Object *cpu_obj);
typedef struct RISCVCPUMultiExtConfig {
const char *name;
uint32_t offset;
bool enabled;
} RISCVCPUMultiExtConfig;
extern const RISCVCPUMultiExtConfig riscv_cpu_extensions[];
extern const RISCVCPUMultiExtConfig riscv_cpu_vendor_exts[];
extern const RISCVCPUMultiExtConfig riscv_cpu_experimental_exts[];
extern const RISCVCPUMultiExtConfig riscv_cpu_named_features[];
extern const RISCVCPUMultiExtConfig riscv_cpu_deprecated_exts[];
typedef struct isa_ext_data {
const char *name;
int min_version;
int ext_enable_offset;
} RISCVIsaExtData;
extern const RISCVIsaExtData isa_edata_arr[];
char *riscv_cpu_get_name(RISCVCPU *cpu);
void riscv_cpu_finalize_features(RISCVCPU *cpu, Error **errp);
void riscv_add_satp_mode_properties(Object *obj);
bool riscv_cpu_accelerator_compatible(RISCVCPU *cpu);
/* CSR function table */
extern riscv_csr_operations csr_ops[CSR_TABLE_SIZE];
extern const bool valid_vm_1_10_32[], valid_vm_1_10_64[];
void riscv_get_csr_ops(int csrno, riscv_csr_operations *ops);
void riscv_set_csr_ops(int csrno, riscv_csr_operations *ops);
void riscv_cpu_register_gdb_regs_for_features(CPUState *cs);
target_ulong riscv_new_csr_seed(target_ulong new_value,
target_ulong write_mask);
uint8_t satp_mode_max_from_map(uint32_t map);
const char *satp_mode_str(uint8_t satp_mode, bool is_32_bit);
/* Implemented in th_csr.c */
void th_register_custom_csrs(RISCVCPU *cpu);
const char *priv_spec_to_str(int priv_version);
#endif /* RISCV_CPU_H */