qemu/target/alpha/cpu.c

267 lines
7.9 KiB
C

/*
* 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)
{
AlphaCPU *cpu = ALPHA_CPU(cs);
cpu->env.pc = value;
}
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 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;
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);
}
static void alpha_cpu_list_entry(gpointer data, gpointer user_data)
{
ObjectClass *oc = data;
qemu_printf(" %s\n", object_class_get_name(oc));
}
void alpha_cpu_list(void)
{
GSList *list;
list = object_class_get_list_sorted(TYPE_ALPHA_CPU, false);
qemu_printf("Available CPUs:\n");
g_slist_foreach(list, alpha_cpu_list_entry, NULL);
g_slist_free(list);
}
/* 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 &&
!object_class_is_abstract(oc)) {
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);
if (oc != NULL && object_class_is_abstract(oc)) {
oc = NULL;
}
/* TODO: remove match everything nonsense */
/* Default to ev67; no reason not to emulate insns by default. */
if (!oc) {
oc = object_class_by_name(ALPHA_CPU_TYPE_NAME("ev67"));
}
return oc;
}
static void ev4_cpu_initfn(Object *obj)
{
AlphaCPU *cpu = ALPHA_CPU(obj);
CPUAlphaState *env = &cpu->env;
env->implver = IMPLVER_2106x;
}
static void ev5_cpu_initfn(Object *obj)
{
AlphaCPU *cpu = ALPHA_CPU(obj);
CPUAlphaState *env = &cpu->env;
env->implver = IMPLVER_21164;
}
static void ev56_cpu_initfn(Object *obj)
{
AlphaCPU *cpu = ALPHA_CPU(obj);
CPUAlphaState *env = &cpu->env;
env->amask |= AMASK_BWX;
}
static void pca56_cpu_initfn(Object *obj)
{
AlphaCPU *cpu = ALPHA_CPU(obj);
CPUAlphaState *env = &cpu->env;
env->amask |= AMASK_MVI;
}
static void ev6_cpu_initfn(Object *obj)
{
AlphaCPU *cpu = ALPHA_CPU(obj);
CPUAlphaState *env = &cpu->env;
env->implver = IMPLVER_21264;
env->amask = AMASK_BWX | AMASK_FIX | AMASK_MVI | AMASK_TRAP;
}
static void ev67_cpu_initfn(Object *obj)
{
AlphaCPU *cpu = ALPHA_CPU(obj);
CPUAlphaState *env = &cpu->env;
env->amask |= AMASK_CIX | AMASK_PREFETCH;
}
static void alpha_cpu_initfn(Object *obj)
{
AlphaCPU *cpu = ALPHA_CPU(obj);
CPUAlphaState *env = &cpu->env;
cpu_set_cpustate_pointers(cpu);
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
}
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->do_interrupt = alpha_cpu_do_interrupt;
cc->cpu_exec_interrupt = alpha_cpu_exec_interrupt;
cc->dump_state = alpha_cpu_dump_state;
cc->set_pc = alpha_cpu_set_pc;
cc->gdb_read_register = alpha_cpu_gdb_read_register;
cc->gdb_write_register = alpha_cpu_gdb_write_register;
cc->tlb_fill = alpha_cpu_tlb_fill;
#ifndef CONFIG_USER_ONLY
cc->do_transaction_failed = alpha_cpu_do_transaction_failed;
cc->do_unaligned_access = alpha_cpu_do_unaligned_access;
cc->get_phys_page_debug = alpha_cpu_get_phys_page_debug;
dc->vmsd = &vmstate_alpha_cpu;
#endif
cc->disas_set_info = alpha_cpu_disas_set_info;
cc->tcg_initialize = alpha_translate_init;
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_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)