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/*
* QEMU Alpha CPU
*
* Copyright (c) 2007 Jocelyn Mayer
* Copyright (c) 2012 SUSE LINUX Products GmbH
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see
* <http://www.gnu.org/licenses/lgpl-2.1.html>
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu/qemu-print.h"
#include "cpu.h"
#include "exec/exec-all.h"
static void alpha_cpu_set_pc(CPUState *cs, vaddr value)
{
CPUAlphaState *env = cpu_env(cs);
env->pc = value;
}
static vaddr alpha_cpu_get_pc(CPUState *cs)
{
CPUAlphaState *env = cpu_env(cs);
return env->pc;
}
static void alpha_cpu_synchronize_from_tb(CPUState *cs,
const TranslationBlock *tb)
{
/* The program counter is always up to date with CF_PCREL. */
if (!(tb_cflags(tb) & CF_PCREL)) {
CPUAlphaState *env = cpu_env(cs);
env->pc = tb->pc;
}
}
static void alpha_restore_state_to_opc(CPUState *cs,
const TranslationBlock *tb,
const uint64_t *data)
{
CPUAlphaState *env = cpu_env(cs);
if (tb_cflags(tb) & CF_PCREL) {
env->pc = (env->pc & TARGET_PAGE_MASK) | data[0];
} else {
env->pc = data[0];
}
}
static bool alpha_cpu_has_work(CPUState *cs)
{
/* Here we are checking to see if the CPU should wake up from HALT.
We will have gotten into this state only for WTINT from PALmode. */
/* ??? I'm not sure how the IPL state works with WTINT to keep a CPU
asleep even if (some) interrupts have been asserted. For now,
assume that if a CPU really wants to stay asleep, it will mask
interrupts at the chipset level, which will prevent these bits
from being set in the first place. */
return cs->interrupt_request & (CPU_INTERRUPT_HARD
| CPU_INTERRUPT_TIMER
| CPU_INTERRUPT_SMP
| CPU_INTERRUPT_MCHK);
}
static int alpha_cpu_mmu_index(CPUState *cs, bool ifetch)
{
return alpha_env_mmu_index(cpu_env(cs));
}
static void alpha_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
{
info->mach = bfd_mach_alpha_ev6;
info->print_insn = print_insn_alpha;
}
static void alpha_cpu_realizefn(DeviceState *dev, Error **errp)
{
CPUState *cs = CPU(dev);
AlphaCPUClass *acc = ALPHA_CPU_GET_CLASS(dev);
Error *local_err = NULL;
#ifndef CONFIG_USER_ONLY
/* Use pc-relative instructions in system-mode */
cs->tcg_cflags |= CF_PCREL;
#endif
cpu_exec_realizefn(cs, &local_err);
if (local_err != NULL) {
error_propagate(errp, local_err);
return;
}
qemu_init_vcpu(cs);
acc->parent_realize(dev, errp);
}
/* Models */
typedef struct AlphaCPUAlias {
const char *alias;
const char *typename;
} AlphaCPUAlias;
static const AlphaCPUAlias alpha_cpu_aliases[] = {
{ "21064", ALPHA_CPU_TYPE_NAME("ev4") },
{ "21164", ALPHA_CPU_TYPE_NAME("ev5") },
{ "21164a", ALPHA_CPU_TYPE_NAME("ev56") },
{ "21164pc", ALPHA_CPU_TYPE_NAME("pca56") },
{ "21264", ALPHA_CPU_TYPE_NAME("ev6") },
{ "21264a", ALPHA_CPU_TYPE_NAME("ev67") },
};
static ObjectClass *alpha_cpu_class_by_name(const char *cpu_model)
{
ObjectClass *oc;
char *typename;
int i;
oc = object_class_by_name(cpu_model);
if (oc != NULL && object_class_dynamic_cast(oc, TYPE_ALPHA_CPU) != NULL) {
return oc;
}
for (i = 0; i < ARRAY_SIZE(alpha_cpu_aliases); i++) {
if (strcmp(cpu_model, alpha_cpu_aliases[i].alias) == 0) {
oc = object_class_by_name(alpha_cpu_aliases[i].typename);
assert(oc != NULL && !object_class_is_abstract(oc));
return oc;
}
}
typename = g_strdup_printf(ALPHA_CPU_TYPE_NAME("%s"), cpu_model);
oc = object_class_by_name(typename);
g_free(typename);
return oc;
}
static void ev4_cpu_initfn(Object *obj)
{
cpu_env(CPU(obj))->implver = IMPLVER_2106x;
}
static void ev5_cpu_initfn(Object *obj)
{
cpu_env(CPU(obj))->implver = IMPLVER_21164;
}
static void ev56_cpu_initfn(Object *obj)
{
cpu_env(CPU(obj))->amask |= AMASK_BWX;
}
static void pca56_cpu_initfn(Object *obj)
{
cpu_env(CPU(obj))->amask |= AMASK_MVI;
}
static void ev6_cpu_initfn(Object *obj)
{
CPUAlphaState *env = cpu_env(CPU(obj));
env->implver = IMPLVER_21264;
env->amask = AMASK_BWX | AMASK_FIX | AMASK_MVI | AMASK_TRAP;
}
static void ev67_cpu_initfn(Object *obj)
{
cpu_env(CPU(obj))->amask |= AMASK_CIX | AMASK_PREFETCH;
}
static void alpha_cpu_initfn(Object *obj)
{
CPUAlphaState *env = cpu_env(CPU(obj));
env->lock_addr = -1;
#if defined(CONFIG_USER_ONLY)
env->flags = ENV_FLAG_PS_USER | ENV_FLAG_FEN;
cpu_alpha_store_fpcr(env, (uint64_t)(FPCR_INVD | FPCR_DZED | FPCR_OVFD
| FPCR_UNFD | FPCR_INED | FPCR_DNOD
| FPCR_DYN_NORMAL) << 32);
#else
env->flags = ENV_FLAG_PAL_MODE | ENV_FLAG_FEN;
#endif
}
#ifndef CONFIG_USER_ONLY
#include "hw/core/sysemu-cpu-ops.h"
static const struct SysemuCPUOps alpha_sysemu_ops = {
.get_phys_page_debug = alpha_cpu_get_phys_page_debug,
};
#endif
#include "hw/core/tcg-cpu-ops.h"
static const TCGCPUOps alpha_tcg_ops = {
.initialize = alpha_translate_init,
.synchronize_from_tb = alpha_cpu_synchronize_from_tb,
.restore_state_to_opc = alpha_restore_state_to_opc,
#ifdef CONFIG_USER_ONLY
.record_sigsegv = alpha_cpu_record_sigsegv,
.record_sigbus = alpha_cpu_record_sigbus,
#else
.tlb_fill = alpha_cpu_tlb_fill,
.cpu_exec_interrupt = alpha_cpu_exec_interrupt,
.do_interrupt = alpha_cpu_do_interrupt,
.do_transaction_failed = alpha_cpu_do_transaction_failed,
.do_unaligned_access = alpha_cpu_do_unaligned_access,
#endif /* !CONFIG_USER_ONLY */
};
static void alpha_cpu_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
CPUClass *cc = CPU_CLASS(oc);
AlphaCPUClass *acc = ALPHA_CPU_CLASS(oc);
device_class_set_parent_realize(dc, alpha_cpu_realizefn,
&acc->parent_realize);
cc->class_by_name = alpha_cpu_class_by_name;
cc->has_work = alpha_cpu_has_work;
cc->mmu_index = alpha_cpu_mmu_index;
cc->dump_state = alpha_cpu_dump_state;
cc->set_pc = alpha_cpu_set_pc;
cc->get_pc = alpha_cpu_get_pc;
cc->gdb_read_register = alpha_cpu_gdb_read_register;
cc->gdb_write_register = alpha_cpu_gdb_write_register;
#ifndef CONFIG_USER_ONLY
dc->vmsd = &vmstate_alpha_cpu;
cc->sysemu_ops = &alpha_sysemu_ops;
#endif
cc->disas_set_info = alpha_cpu_disas_set_info;
cc->tcg_ops = &alpha_tcg_ops;
cc->gdb_num_core_regs = 67;
}
#define DEFINE_ALPHA_CPU_TYPE(base_type, cpu_model, initfn) \
{ \
.parent = base_type, \
.instance_init = initfn, \
.name = ALPHA_CPU_TYPE_NAME(cpu_model), \
}
static const TypeInfo alpha_cpu_type_infos[] = {
{
.name = TYPE_ALPHA_CPU,
.parent = TYPE_CPU,
.instance_size = sizeof(AlphaCPU),
.instance_align = __alignof(AlphaCPU),
.instance_init = alpha_cpu_initfn,
.abstract = true,
.class_size = sizeof(AlphaCPUClass),
.class_init = alpha_cpu_class_init,
},
DEFINE_ALPHA_CPU_TYPE(TYPE_ALPHA_CPU, "ev4", ev4_cpu_initfn),
DEFINE_ALPHA_CPU_TYPE(TYPE_ALPHA_CPU, "ev5", ev5_cpu_initfn),
DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev5"), "ev56", ev56_cpu_initfn),
DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev56"), "pca56",
pca56_cpu_initfn),
DEFINE_ALPHA_CPU_TYPE(TYPE_ALPHA_CPU, "ev6", ev6_cpu_initfn),
DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev6"), "ev67", ev67_cpu_initfn),
DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev67"), "ev68", NULL),
};
DEFINE_TYPES(alpha_cpu_type_infos)