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/*
* QEMU UniCore32 CPU
*
* Copyright (c) 2010-2012 Guan Xuetao
* Copyright (c) 2012 SUSE LINUX Products GmbH
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Contributions from 2012-04-01 on are considered under GPL version 2,
* or (at your option) any later version.
*/
#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 uc32_cpu_set_pc(CPUState *cs, vaddr value)
{
UniCore32CPU *cpu = UNICORE32_CPU(cs);
cpu->env.regs[31] = value;
}
static bool uc32_cpu_has_work(CPUState *cs)
{
return cs->interrupt_request &
(CPU_INTERRUPT_HARD | CPU_INTERRUPT_EXITTB);
}
static inline void set_feature(CPUUniCore32State *env, int feature)
{
env->features |= feature;
}
/* CPU models */
static ObjectClass *uc32_cpu_class_by_name(const char *cpu_model)
{
ObjectClass *oc;
char *typename;
if (cpu_model == NULL) {
return NULL;
}
typename = g_strdup_printf("%s-" TYPE_UNICORE32_CPU, cpu_model);
oc = object_class_by_name(typename);
g_free(typename);
if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_UNICORE32_CPU) ||
object_class_is_abstract(oc))) {
oc = NULL;
}
return oc;
}
typedef struct UniCore32CPUInfo {
const char *name;
void (*instance_init)(Object *obj);
} UniCore32CPUInfo;
static void unicore_ii_cpu_initfn(Object *obj)
{
UniCore32CPU *cpu = UNICORE32_CPU(obj);
CPUUniCore32State *env = &cpu->env;
env->cp0.c0_cpuid = 0x4d000863;
env->cp0.c0_cachetype = 0x0d152152;
env->cp0.c1_sys = 0x2000;
env->cp0.c2_base = 0x0;
env->cp0.c3_faultstatus = 0x0;
env->cp0.c4_faultaddr = 0x0;
env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;
set_feature(env, UC32_HWCAP_CMOV);
set_feature(env, UC32_HWCAP_UCF64);
set_snan_bit_is_one(1, &env->ucf64.fp_status);
}
static void uc32_any_cpu_initfn(Object *obj)
{
UniCore32CPU *cpu = UNICORE32_CPU(obj);
CPUUniCore32State *env = &cpu->env;
env->cp0.c0_cpuid = 0xffffffff;
env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;
set_feature(env, UC32_HWCAP_CMOV);
set_feature(env, UC32_HWCAP_UCF64);
set_snan_bit_is_one(1, &env->ucf64.fp_status);
}
static const UniCore32CPUInfo uc32_cpus[] = {
{ .name = "UniCore-II", .instance_init = unicore_ii_cpu_initfn },
{ .name = "any", .instance_init = uc32_any_cpu_initfn },
};
static void uc32_cpu_realizefn(DeviceState *dev, Error **errp)
{
UniCore32CPUClass *ucc = UNICORE32_CPU_GET_CLASS(dev);
qemu_init_vcpu(CPU(dev));
ucc->parent_realize(dev, errp);
}
static void uc32_cpu_initfn(Object *obj)
{
CPUState *cs = CPU(obj);
UniCore32CPU *cpu = UNICORE32_CPU(obj);
CPUUniCore32State *env = &cpu->env;
static bool inited;
cs->env_ptr = env;
cpu_exec_init(cs, &error_abort);
#ifdef CONFIG_USER_ONLY
env->uncached_asr = ASR_MODE_USER;
env->regs[31] = 0;
#else
env->uncached_asr = ASR_MODE_PRIV;
env->regs[31] = 0x03000000;
#endif
tlb_flush(cs, 1);
if (tcg_enabled() && !inited) {
inited = true;
uc32_translate_init();
}
}
static const VMStateDescription vmstate_uc32_cpu = {
.name = "cpu",
.unmigratable = 1,
};
static void uc32_cpu_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
CPUClass *cc = CPU_CLASS(oc);
UniCore32CPUClass *ucc = UNICORE32_CPU_CLASS(oc);
ucc->parent_realize = dc->realize;
dc->realize = uc32_cpu_realizefn;
cc->class_by_name = uc32_cpu_class_by_name;
cc->has_work = uc32_cpu_has_work;
cc->do_interrupt = uc32_cpu_do_interrupt;
cc->cpu_exec_interrupt = uc32_cpu_exec_interrupt;
cc->dump_state = uc32_cpu_dump_state;
cc->set_pc = uc32_cpu_set_pc;
#ifdef CONFIG_USER_ONLY
cc->handle_mmu_fault = uc32_cpu_handle_mmu_fault;
#else
cc->get_phys_page_debug = uc32_cpu_get_phys_page_debug;
#endif
dc->vmsd = &vmstate_uc32_cpu;
/*
* Reason: uc32_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 uc32_register_cpu_type(const UniCore32CPUInfo *info)
{
TypeInfo type_info = {
.parent = TYPE_UNICORE32_CPU,
.instance_init = info->instance_init,
};
type_info.name = g_strdup_printf("%s-" TYPE_UNICORE32_CPU, info->name);
type_register(&type_info);
g_free((void *)type_info.name);
}
static const TypeInfo uc32_cpu_type_info = {
.name = TYPE_UNICORE32_CPU,
.parent = TYPE_CPU,
.instance_size = sizeof(UniCore32CPU),
.instance_init = uc32_cpu_initfn,
.abstract = true,
.class_size = sizeof(UniCore32CPUClass),
.class_init = uc32_cpu_class_init,
};
static void uc32_cpu_register_types(void)
{
int i;
type_register_static(&uc32_cpu_type_info);
for (i = 0; i < ARRAY_SIZE(uc32_cpus); i++) {
uc32_register_cpu_type(&uc32_cpus[i]);
}
}
type_init(uc32_cpu_register_types)
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