qemu/target/tricore/cpu.c
Alex Bennée 1f5c00cfdb qom/cpu: move tlb_flush to cpu_common_reset
It is a common thing amongst the various cpu reset functions want to
flush the SoftMMU's TLB entries. This is done either by calling
tlb_flush directly or by way of a general memset of the CPU
structure (sometimes both).

This moves the tlb_flush call to the common reset function and
additionally ensures it is only done for the CONFIG_SOFTMMU case and
when tcg is enabled.

In some target cases we add an empty end_of_reset_fields structure to the
target vCPU structure so have a clear end point for any memset which
is resetting value in the structure before CPU_COMMON (where the TLB
structures are).

While this is a nice clean-up in general it is also a precursor for
changes coming to cputlb for MTTCG where the clearing of entries
can't be done arbitrarily across vCPUs. Currently the cpu_reset
function is usually called from the context of another vCPU as the
architectural power up sequence is run. By using the cputlb API
functions we can ensure the right behaviour in the future.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
2017-01-13 14:24:31 +00:00

219 lines
5.5 KiB
C

/*
* 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);
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;
Error *local_err = NULL;
cpu_exec_realizefn(cs, &local_err);
if (local_err != NULL) {
error_propagate(errp, local_err);
return;
}
/* 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;
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;
}
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)