267 lines
7.1 KiB
C
267 lines
7.1 KiB
C
/*
|
|
* 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 "qemu/osdep.h"
|
|
#include "qapi/error.h"
|
|
#include "cpu.h"
|
|
#include "qemu-common.h"
|
|
#include "migration/vmstate.h"
|
|
#include "exec/exec-all.h"
|
|
|
|
|
|
static void m68k_cpu_set_pc(CPUState *cs, vaddr value)
|
|
{
|
|
M68kCPU *cpu = M68K_CPU(cs);
|
|
|
|
cpu->env.pc = value;
|
|
}
|
|
|
|
static bool m68k_cpu_has_work(CPUState *cs)
|
|
{
|
|
return cs->interrupt_request & CPU_INTERRUPT_HARD;
|
|
}
|
|
|
|
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, features));
|
|
#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(s, 1);
|
|
}
|
|
|
|
static void m68k_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
|
|
{
|
|
info->print_insn = print_insn_m68k;
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
CPUState *cs = CPU(dev);
|
|
M68kCPU *cpu = M68K_CPU(dev);
|
|
M68kCPUClass *mcc = M68K_CPU_GET_CLASS(dev);
|
|
|
|
m68k_cpu_init_gdb(cpu);
|
|
|
|
cpu_reset(cs);
|
|
qemu_init_vcpu(cs);
|
|
|
|
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(cs, &error_abort);
|
|
|
|
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->has_work = m68k_cpu_has_work;
|
|
cc->do_interrupt = m68k_cpu_do_interrupt;
|
|
cc->cpu_exec_interrupt = m68k_cpu_exec_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;
|
|
#ifdef CONFIG_USER_ONLY
|
|
cc->handle_mmu_fault = m68k_cpu_handle_mmu_fault;
|
|
#else
|
|
cc->get_phys_page_debug = m68k_cpu_get_phys_page_debug;
|
|
#endif
|
|
cc->cpu_exec_enter = m68k_cpu_exec_enter;
|
|
cc->cpu_exec_exit = m68k_cpu_exec_exit;
|
|
cc->disas_set_info = m68k_cpu_disas_set_info;
|
|
|
|
cc->gdb_num_core_regs = 18;
|
|
cc->gdb_core_xml_file = "cf-core.xml";
|
|
|
|
dc->vmsd = &vmstate_m68k_cpu;
|
|
|
|
/*
|
|
* Reason: m68k_cpu_initfn() calls cpu_exec_init(), which saves
|
|
* the object in cpus -> dangling pointer after final
|
|
* object_unref().
|
|
*/
|
|
dc->cannot_destroy_with_object_finalize_yet = true;
|
|
}
|
|
|
|
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)
|