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/*
* QEMU Motorola 68k CPU
*
* 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 "cpu.h"
#include "qemu-common.h"
#include "migration/vmstate.h"
static void m68k_cpu_set_pc(CPUState *cs, vaddr value)
{
M68kCPU *cpu = M68K_CPU(cs);
cpu->env.pc = value;
}
static void m68k_set_feature(CPUM68KState *env, int feature)
{
env->features |= (1u << feature);
}
/* CPUClass::reset() */
static void m68k_cpu_reset(CPUState *s)
{
M68kCPU *cpu = M68K_CPU(s);
M68kCPUClass *mcc = M68K_CPU_GET_CLASS(cpu);
CPUM68KState *env = &cpu->env;
mcc->parent_reset(s);
memset(env, 0, offsetof(CPUM68KState, breakpoints));
#if !defined(CONFIG_USER_ONLY)
env->sr = 0x2700;
#endif
m68k_switch_sp(env);
/* ??? FP regs should be initialized to NaN. */
env->cc_op = CC_OP_FLAGS;
/* TODO: We should set PC from the interrupt vector. */
env->pc = 0;
tlb_flush(env, 1);
}
/* CPU models */
static ObjectClass *m68k_cpu_class_by_name(const char *cpu_model)
{
ObjectClass *oc;
char *typename;
if (cpu_model == NULL) {
return NULL;
}
typename = g_strdup_printf("%s-" TYPE_M68K_CPU, cpu_model);
oc = object_class_by_name(typename);
g_free(typename);
if (oc != NULL && (object_class_dynamic_cast(oc, TYPE_M68K_CPU) == NULL ||
object_class_is_abstract(oc))) {
return NULL;
}
return oc;
}
static void m5206_cpu_initfn(Object *obj)
{
M68kCPU *cpu = M68K_CPU(obj);
CPUM68KState *env = &cpu->env;
m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
}
static void m5208_cpu_initfn(Object *obj)
{
M68kCPU *cpu = M68K_CPU(obj);
CPUM68KState *env = &cpu->env;
m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
m68k_set_feature(env, M68K_FEATURE_BRAL);
m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
m68k_set_feature(env, M68K_FEATURE_USP);
}
static void cfv4e_cpu_initfn(Object *obj)
{
M68kCPU *cpu = M68K_CPU(obj);
CPUM68KState *env = &cpu->env;
m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
m68k_set_feature(env, M68K_FEATURE_BRAL);
m68k_set_feature(env, M68K_FEATURE_CF_FPU);
m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
m68k_set_feature(env, M68K_FEATURE_USP);
}
static void any_cpu_initfn(Object *obj)
{
M68kCPU *cpu = M68K_CPU(obj);
CPUM68KState *env = &cpu->env;
m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
m68k_set_feature(env, M68K_FEATURE_BRAL);
m68k_set_feature(env, M68K_FEATURE_CF_FPU);
/* MAC and EMAC are mututally exclusive, so pick EMAC.
It's mostly backwards compatible. */
m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B);
m68k_set_feature(env, M68K_FEATURE_USP);
m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
}
typedef struct M68kCPUInfo {
const char *name;
void (*instance_init)(Object *obj);
} M68kCPUInfo;
static const M68kCPUInfo m68k_cpus[] = {
{ .name = "m5206", .instance_init = m5206_cpu_initfn },
{ .name = "m5208", .instance_init = m5208_cpu_initfn },
{ .name = "cfv4e", .instance_init = cfv4e_cpu_initfn },
{ .name = "any", .instance_init = any_cpu_initfn },
};
static void m68k_cpu_realizefn(DeviceState *dev, Error **errp)
{
M68kCPU *cpu = M68K_CPU(dev);
M68kCPUClass *mcc = M68K_CPU_GET_CLASS(dev);
m68k_cpu_init_gdb(cpu);
cpu_reset(CPU(cpu));
mcc->parent_realize(dev, errp);
}
static void m68k_cpu_initfn(Object *obj)
{
CPUState *cs = CPU(obj);
M68kCPU *cpu = M68K_CPU(obj);
CPUM68KState *env = &cpu->env;
static bool inited;
cs->env_ptr = env;
cpu_exec_init(env);
if (tcg_enabled() && !inited) {
inited = true;
m68k_tcg_init();
}
}
static const VMStateDescription vmstate_m68k_cpu = {
.name = "cpu",
.unmigratable = 1,
};
static void m68k_cpu_class_init(ObjectClass *c, void *data)
{
M68kCPUClass *mcc = M68K_CPU_CLASS(c);
CPUClass *cc = CPU_CLASS(c);
DeviceClass *dc = DEVICE_CLASS(c);
mcc->parent_realize = dc->realize;
dc->realize = m68k_cpu_realizefn;
mcc->parent_reset = cc->reset;
cc->reset = m68k_cpu_reset;
cc->class_by_name = m68k_cpu_class_by_name;
cc->do_interrupt = m68k_cpu_do_interrupt;
cc->dump_state = m68k_cpu_dump_state;
cc->set_pc = m68k_cpu_set_pc;
cc->gdb_read_register = m68k_cpu_gdb_read_register;
cc->gdb_write_register = m68k_cpu_gdb_write_register;
#ifndef CONFIG_USER_ONLY
cc->get_phys_page_debug = m68k_cpu_get_phys_page_debug;
#endif
dc->vmsd = &vmstate_m68k_cpu;
cc->gdb_num_core_regs = 18;
}
static void register_cpu_type(const M68kCPUInfo *info)
{
TypeInfo type_info = {
.parent = TYPE_M68K_CPU,
.instance_init = info->instance_init,
};
type_info.name = g_strdup_printf("%s-" TYPE_M68K_CPU, info->name);
type_register(&type_info);
g_free((void *)type_info.name);
}
static const TypeInfo m68k_cpu_type_info = {
.name = TYPE_M68K_CPU,
.parent = TYPE_CPU,
.instance_size = sizeof(M68kCPU),
.instance_init = m68k_cpu_initfn,
.abstract = true,
.class_size = sizeof(M68kCPUClass),
.class_init = m68k_cpu_class_init,
};
static void m68k_cpu_register_types(void)
{
int i;
type_register_static(&m68k_cpu_type_info);
for (i = 0; i < ARRAY_SIZE(m68k_cpus); i++) {
register_cpu_type(&m68k_cpus[i]);
}
}
type_init(m68k_cpu_register_types)
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