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/*
* TriCore emulation for qemu: main translation routines.
*
* Copyright (c) 2012-2014 Bastian Koppelmann C-Lab/University Paderborn
*
* 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 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/>.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "cpu.h"
#include "qemu-common.h"
#include "exec/exec-all.h"
static inline void set_feature(CPUTriCoreState *env, int feature)
{
env->features |= 1ULL << feature;
}
static void tricore_cpu_set_pc(CPUState *cs, vaddr value)
{
TriCoreCPU *cpu = TRICORE_CPU(cs);
CPUTriCoreState *env = &cpu->env;
env->PC = value & ~(target_ulong)1;
}
static void tricore_cpu_synchronize_from_tb(CPUState *cs,
TranslationBlock *tb)
{
TriCoreCPU *cpu = TRICORE_CPU(cs);
CPUTriCoreState *env = &cpu->env;
env->PC = tb->pc;
}
static void tricore_cpu_reset(CPUState *s)
{
TriCoreCPU *cpu = TRICORE_CPU(s);
TriCoreCPUClass *tcc = TRICORE_CPU_GET_CLASS(cpu);
CPUTriCoreState *env = &cpu->env;
tcc->parent_reset(s);
tlb_flush(s, 1);
cpu_state_reset(env);
}
static bool tricore_cpu_has_work(CPUState *cs)
{
return true;
}
static void tricore_cpu_realizefn(DeviceState *dev, Error **errp)
{
CPUState *cs = CPU(dev);
TriCoreCPU *cpu = TRICORE_CPU(dev);
TriCoreCPUClass *tcc = TRICORE_CPU_GET_CLASS(dev);
CPUTriCoreState *env = &cpu->env;
/* Some features automatically imply others */
if (tricore_feature(env, TRICORE_FEATURE_161)) {
set_feature(env, TRICORE_FEATURE_16);
}
if (tricore_feature(env, TRICORE_FEATURE_16)) {
set_feature(env, TRICORE_FEATURE_131);
}
if (tricore_feature(env, TRICORE_FEATURE_131)) {
set_feature(env, TRICORE_FEATURE_13);
}
cpu_reset(cs);
qemu_init_vcpu(cs);
tcc->parent_realize(dev, errp);
}
static void tricore_cpu_initfn(Object *obj)
{
CPUState *cs = CPU(obj);
TriCoreCPU *cpu = TRICORE_CPU(obj);
CPUTriCoreState *env = &cpu->env;
cs->env_ptr = env;
cpu_exec_init(cs, &error_abort);
if (tcg_enabled()) {
tricore_tcg_init();
}
}
static ObjectClass *tricore_cpu_class_by_name(const char *cpu_model)
{
ObjectClass *oc;
char *typename;
if (!cpu_model) {
return NULL;
}
typename = g_strdup_printf("%s-" TYPE_TRICORE_CPU, cpu_model);
oc = object_class_by_name(typename);
g_free(typename);
if (!oc || !object_class_dynamic_cast(oc, TYPE_TRICORE_CPU) ||
object_class_is_abstract(oc)) {
return NULL;
}
return oc;
}
static void tc1796_initfn(Object *obj)
{
TriCoreCPU *cpu = TRICORE_CPU(obj);
set_feature(&cpu->env, TRICORE_FEATURE_13);
}
static void tc1797_initfn(Object *obj)
{
TriCoreCPU *cpu = TRICORE_CPU(obj);
set_feature(&cpu->env, TRICORE_FEATURE_131);
}
static void tc27x_initfn(Object *obj)
{
TriCoreCPU *cpu = TRICORE_CPU(obj);
set_feature(&cpu->env, TRICORE_FEATURE_161);
}
typedef struct TriCoreCPUInfo {
const char *name;
void (*initfn)(Object *obj);
void (*class_init)(ObjectClass *oc, void *data);
} TriCoreCPUInfo;
static const TriCoreCPUInfo tricore_cpus[] = {
{ .name = "tc1796", .initfn = tc1796_initfn },
{ .name = "tc1797", .initfn = tc1797_initfn },
{ .name = "tc27x", .initfn = tc27x_initfn },
{ .name = NULL }
};
static void tricore_cpu_class_init(ObjectClass *c, void *data)
{
TriCoreCPUClass *mcc = TRICORE_CPU_CLASS(c);
CPUClass *cc = CPU_CLASS(c);
DeviceClass *dc = DEVICE_CLASS(c);
mcc->parent_realize = dc->realize;
dc->realize = tricore_cpu_realizefn;
mcc->parent_reset = cc->reset;
cc->reset = tricore_cpu_reset;
cc->class_by_name = tricore_cpu_class_by_name;
cc->has_work = tricore_cpu_has_work;
cc->dump_state = tricore_cpu_dump_state;
cc->set_pc = tricore_cpu_set_pc;
cc->synchronize_from_tb = tricore_cpu_synchronize_from_tb;
/*
* Reason: tricore_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 cpu_register(const TriCoreCPUInfo *info)
{
TypeInfo type_info = {
.parent = TYPE_TRICORE_CPU,
.instance_size = sizeof(TriCoreCPU),
.instance_init = info->initfn,
.class_size = sizeof(TriCoreCPUClass),
.class_init = info->class_init,
};
type_info.name = g_strdup_printf("%s-" TYPE_TRICORE_CPU, info->name);
type_register(&type_info);
g_free((void *)type_info.name);
}
static const TypeInfo tricore_cpu_type_info = {
.name = TYPE_TRICORE_CPU,
.parent = TYPE_CPU,
.instance_size = sizeof(TriCoreCPU),
.instance_init = tricore_cpu_initfn,
.abstract = true,
.class_size = sizeof(TriCoreCPUClass),
.class_init = tricore_cpu_class_init,
};
static void tricore_cpu_register_types(void)
{
const TriCoreCPUInfo *info = tricore_cpus;
type_register_static(&tricore_cpu_type_info);
while (info->name) {
cpu_register(info);
info++;
}
}
type_init(tricore_cpu_register_types)
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