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/*
* QEMU Moxie CPU
*
* Copyright (c) 2013 Anthony Green
*
* 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 General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "qemu-common.h"
#include "migration/vmstate.h"
#include "machine.h"
static void moxie_cpu_set_pc(CPUState *cs, vaddr value)
{
MoxieCPU *cpu = MOXIE_CPU(cs);
cpu->env.pc = value;
}
static bool moxie_cpu_has_work(CPUState *cs)
{
return cs->interrupt_request & CPU_INTERRUPT_HARD;
}
static void moxie_cpu_reset(CPUState *s)
{
MoxieCPU *cpu = MOXIE_CPU(s);
MoxieCPUClass *mcc = MOXIE_CPU_GET_CLASS(cpu);
CPUMoxieState *env = &cpu->env;
mcc->parent_reset(s);
memset(env, 0, sizeof(CPUMoxieState));
env->pc = 0x1000;
tlb_flush(s, 1);
}
static void moxie_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
{
info->mach = bfd_arch_moxie;
info->print_insn = print_insn_moxie;
}
static void moxie_cpu_realizefn(DeviceState *dev, Error **errp)
{
CPUState *cs = CPU(dev);
MoxieCPUClass *mcc = MOXIE_CPU_GET_CLASS(dev);
qemu_init_vcpu(cs);
cpu_reset(cs);
mcc->parent_realize(dev, errp);
}
static void moxie_cpu_initfn(Object *obj)
{
CPUState *cs = CPU(obj);
MoxieCPU *cpu = MOXIE_CPU(obj);
static int inited;
cs->env_ptr = &cpu->env;
cpu_exec_init(cs, &error_abort);
if (tcg_enabled() && !inited) {
inited = 1;
moxie_translate_init();
}
}
static ObjectClass *moxie_cpu_class_by_name(const char *cpu_model)
{
ObjectClass *oc;
if (cpu_model == NULL) {
return NULL;
}
oc = object_class_by_name(cpu_model);
if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_MOXIE_CPU) ||
object_class_is_abstract(oc))) {
return NULL;
}
return oc;
}
static void moxie_cpu_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
CPUClass *cc = CPU_CLASS(oc);
MoxieCPUClass *mcc = MOXIE_CPU_CLASS(oc);
mcc->parent_realize = dc->realize;
dc->realize = moxie_cpu_realizefn;
mcc->parent_reset = cc->reset;
cc->reset = moxie_cpu_reset;
cc->class_by_name = moxie_cpu_class_by_name;
cc->has_work = moxie_cpu_has_work;
cc->do_interrupt = moxie_cpu_do_interrupt;
cc->dump_state = moxie_cpu_dump_state;
cc->set_pc = moxie_cpu_set_pc;
#ifdef CONFIG_USER_ONLY
cc->handle_mmu_fault = moxie_cpu_handle_mmu_fault;
#else
cc->get_phys_page_debug = moxie_cpu_get_phys_page_debug;
cc->vmsd = &vmstate_moxie_cpu;
#endif
cc->disas_set_info = moxie_cpu_disas_set_info;
/*
* Reason: moxie_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 moxielite_initfn(Object *obj)
{
/* Set cpu feature flags */
}
static void moxie_any_initfn(Object *obj)
{
/* Set cpu feature flags */
}
typedef struct MoxieCPUInfo {
const char *name;
void (*initfn)(Object *obj);
} MoxieCPUInfo;
static const MoxieCPUInfo moxie_cpus[] = {
{ .name = "MoxieLite", .initfn = moxielite_initfn },
{ .name = "any", .initfn = moxie_any_initfn },
};
MoxieCPU *cpu_moxie_init(const char *cpu_model)
{
return MOXIE_CPU(cpu_generic_init(TYPE_MOXIE_CPU, cpu_model));
}
static void cpu_register(const MoxieCPUInfo *info)
{
TypeInfo type_info = {
.parent = TYPE_MOXIE_CPU,
.instance_size = sizeof(MoxieCPU),
.instance_init = info->initfn,
.class_size = sizeof(MoxieCPUClass),
};
type_info.name = g_strdup_printf("%s-" TYPE_MOXIE_CPU, info->name);
type_register(&type_info);
g_free((void *)type_info.name);
}
static const TypeInfo moxie_cpu_type_info = {
.name = TYPE_MOXIE_CPU,
.parent = TYPE_CPU,
.instance_size = sizeof(MoxieCPU),
.instance_init = moxie_cpu_initfn,
.class_size = sizeof(MoxieCPUClass),
.class_init = moxie_cpu_class_init,
};
static void moxie_cpu_register_types(void)
{
int i;
type_register_static(&moxie_cpu_type_info);
for (i = 0; i < ARRAY_SIZE(moxie_cpus); i++) {
cpu_register(&moxie_cpus[i]);
}
}
type_init(moxie_cpu_register_types)
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