qemu/target/sh4/cpu.c

296 lines
8.2 KiB
C

/*
* QEMU SuperH CPU
*
* Copyright (c) 2005 Samuel Tardieu
* 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 "cpu.h"
#include "qemu-common.h"
#include "migration/vmstate.h"
#include "exec/exec-all.h"
#include "fpu/softfloat.h"
static void superh_cpu_set_pc(CPUState *cs, vaddr value)
{
SuperHCPU *cpu = SUPERH_CPU(cs);
cpu->env.pc = value;
}
static void superh_cpu_synchronize_from_tb(CPUState *cs, TranslationBlock *tb)
{
SuperHCPU *cpu = SUPERH_CPU(cs);
cpu->env.pc = tb->pc;
cpu->env.flags = tb->flags & TB_FLAG_ENVFLAGS_MASK;
}
static bool superh_cpu_has_work(CPUState *cs)
{
return cs->interrupt_request & CPU_INTERRUPT_HARD;
}
/* CPUClass::reset() */
static void superh_cpu_reset(CPUState *s)
{
SuperHCPU *cpu = SUPERH_CPU(s);
SuperHCPUClass *scc = SUPERH_CPU_GET_CLASS(cpu);
CPUSH4State *env = &cpu->env;
scc->parent_reset(s);
memset(env, 0, offsetof(CPUSH4State, end_reset_fields));
env->pc = 0xA0000000;
#if defined(CONFIG_USER_ONLY)
env->fpscr = FPSCR_PR; /* value for userspace according to the kernel */
set_float_rounding_mode(float_round_nearest_even, &env->fp_status); /* ?! */
#else
env->sr = (1u << SR_MD) | (1u << SR_RB) | (1u << SR_BL) |
(1u << SR_I3) | (1u << SR_I2) | (1u << SR_I1) | (1u << SR_I0);
env->fpscr = FPSCR_DN | FPSCR_RM_ZERO; /* CPU reset value according to SH4 manual */
set_float_rounding_mode(float_round_to_zero, &env->fp_status);
set_flush_to_zero(1, &env->fp_status);
#endif
set_default_nan_mode(1, &env->fp_status);
set_snan_bit_is_one(1, &env->fp_status);
}
static void superh_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
{
info->mach = bfd_mach_sh4;
info->print_insn = print_insn_sh;
}
typedef struct SuperHCPUListState {
fprintf_function cpu_fprintf;
FILE *file;
} SuperHCPUListState;
/* Sort alphabetically by type name. */
static gint superh_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);
return strcmp(name_a, name_b);
}
static void superh_cpu_list_entry(gpointer data, gpointer user_data)
{
SuperHCPUListState *s = user_data;
const char *typename = object_class_get_name(OBJECT_CLASS(data));
int len = strlen(typename) - strlen(SUPERH_CPU_TYPE_SUFFIX);
(*s->cpu_fprintf)(s->file, "%.*s\n", len, typename);
}
void sh4_cpu_list(FILE *f, fprintf_function cpu_fprintf)
{
SuperHCPUListState s = {
.cpu_fprintf = cpu_fprintf,
.file = f,
};
GSList *list;
list = object_class_get_list(TYPE_SUPERH_CPU, false);
list = g_slist_sort(list, superh_cpu_list_compare);
g_slist_foreach(list, superh_cpu_list_entry, &s);
g_slist_free(list);
}
static ObjectClass *superh_cpu_class_by_name(const char *cpu_model)
{
ObjectClass *oc;
char *s, *typename = NULL;
s = g_ascii_strdown(cpu_model, -1);
if (strcmp(s, "any") == 0) {
oc = object_class_by_name(TYPE_SH7750R_CPU);
goto out;
}
typename = g_strdup_printf(SUPERH_CPU_TYPE_NAME("%s"), s);
oc = object_class_by_name(typename);
if (oc != NULL && object_class_is_abstract(oc)) {
oc = NULL;
}
out:
g_free(s);
g_free(typename);
return oc;
}
static void sh7750r_cpu_initfn(Object *obj)
{
SuperHCPU *cpu = SUPERH_CPU(obj);
CPUSH4State *env = &cpu->env;
env->id = SH_CPU_SH7750R;
env->features = SH_FEATURE_BCR3_AND_BCR4;
}
static void sh7750r_class_init(ObjectClass *oc, void *data)
{
SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);
scc->pvr = 0x00050000;
scc->prr = 0x00000100;
scc->cvr = 0x00110000;
}
static void sh7751r_cpu_initfn(Object *obj)
{
SuperHCPU *cpu = SUPERH_CPU(obj);
CPUSH4State *env = &cpu->env;
env->id = SH_CPU_SH7751R;
env->features = SH_FEATURE_BCR3_AND_BCR4;
}
static void sh7751r_class_init(ObjectClass *oc, void *data)
{
SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);
scc->pvr = 0x04050005;
scc->prr = 0x00000113;
scc->cvr = 0x00110000; /* Neutered caches, should be 0x20480000 */
}
static void sh7785_cpu_initfn(Object *obj)
{
SuperHCPU *cpu = SUPERH_CPU(obj);
CPUSH4State *env = &cpu->env;
env->id = SH_CPU_SH7785;
env->features = SH_FEATURE_SH4A;
}
static void sh7785_class_init(ObjectClass *oc, void *data)
{
SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);
scc->pvr = 0x10300700;
scc->prr = 0x00000200;
scc->cvr = 0x71440211;
}
static void superh_cpu_realizefn(DeviceState *dev, Error **errp)
{
CPUState *cs = CPU(dev);
SuperHCPUClass *scc = SUPERH_CPU_GET_CLASS(dev);
Error *local_err = NULL;
cpu_exec_realizefn(cs, &local_err);
if (local_err != NULL) {
error_propagate(errp, local_err);
return;
}
cpu_reset(cs);
qemu_init_vcpu(cs);
scc->parent_realize(dev, errp);
}
static void superh_cpu_initfn(Object *obj)
{
CPUState *cs = CPU(obj);
SuperHCPU *cpu = SUPERH_CPU(obj);
CPUSH4State *env = &cpu->env;
cs->env_ptr = env;
env->movcal_backup_tail = &(env->movcal_backup);
}
static const VMStateDescription vmstate_sh_cpu = {
.name = "cpu",
.unmigratable = 1,
};
static void superh_cpu_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
CPUClass *cc = CPU_CLASS(oc);
SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);
device_class_set_parent_realize(dc, superh_cpu_realizefn,
&scc->parent_realize);
scc->parent_reset = cc->reset;
cc->reset = superh_cpu_reset;
cc->class_by_name = superh_cpu_class_by_name;
cc->has_work = superh_cpu_has_work;
cc->do_interrupt = superh_cpu_do_interrupt;
cc->cpu_exec_interrupt = superh_cpu_exec_interrupt;
cc->dump_state = superh_cpu_dump_state;
cc->set_pc = superh_cpu_set_pc;
cc->synchronize_from_tb = superh_cpu_synchronize_from_tb;
cc->gdb_read_register = superh_cpu_gdb_read_register;
cc->gdb_write_register = superh_cpu_gdb_write_register;
#ifdef CONFIG_USER_ONLY
cc->handle_mmu_fault = superh_cpu_handle_mmu_fault;
#else
cc->do_unaligned_access = superh_cpu_do_unaligned_access;
cc->get_phys_page_debug = superh_cpu_get_phys_page_debug;
#endif
cc->disas_set_info = superh_cpu_disas_set_info;
cc->tcg_initialize = sh4_translate_init;
cc->gdb_num_core_regs = 59;
dc->vmsd = &vmstate_sh_cpu;
}
#define DEFINE_SUPERH_CPU_TYPE(type_name, cinit, initfn) \
{ \
.name = type_name, \
.parent = TYPE_SUPERH_CPU, \
.class_init = cinit, \
.instance_init = initfn, \
}
static const TypeInfo superh_cpu_type_infos[] = {
{
.name = TYPE_SUPERH_CPU,
.parent = TYPE_CPU,
.instance_size = sizeof(SuperHCPU),
.instance_init = superh_cpu_initfn,
.abstract = true,
.class_size = sizeof(SuperHCPUClass),
.class_init = superh_cpu_class_init,
},
DEFINE_SUPERH_CPU_TYPE(TYPE_SH7750R_CPU, sh7750r_class_init,
sh7750r_cpu_initfn),
DEFINE_SUPERH_CPU_TYPE(TYPE_SH7751R_CPU, sh7751r_class_init,
sh7751r_cpu_initfn),
DEFINE_SUPERH_CPU_TYPE(TYPE_SH7785_CPU, sh7785_class_init,
sh7785_cpu_initfn),
};
DEFINE_TYPES(superh_cpu_type_infos)