qemu/target-cris/cpu.c

316 lines
7.9 KiB
C

/*
* QEMU CRIS CPU
*
* Copyright (c) 2008 AXIS Communications AB
* Written by Edgar E. Iglesias.
*
* 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 "cpu.h"
#include "qemu-common.h"
#include "mmu.h"
static void cris_cpu_set_pc(CPUState *cs, vaddr value)
{
CRISCPU *cpu = CRIS_CPU(cs);
cpu->env.pc = value;
}
static bool cris_cpu_has_work(CPUState *cs)
{
return cs->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_NMI);
}
/* CPUClass::reset() */
static void cris_cpu_reset(CPUState *s)
{
CRISCPU *cpu = CRIS_CPU(s);
CRISCPUClass *ccc = CRIS_CPU_GET_CLASS(cpu);
CPUCRISState *env = &cpu->env;
uint32_t vr;
ccc->parent_reset(s);
vr = env->pregs[PR_VR];
memset(env, 0, offsetof(CPUCRISState, load_info));
env->pregs[PR_VR] = vr;
tlb_flush(s, 1);
#if defined(CONFIG_USER_ONLY)
/* start in user mode with interrupts enabled. */
env->pregs[PR_CCS] |= U_FLAG | I_FLAG | P_FLAG;
#else
cris_mmu_init(env);
env->pregs[PR_CCS] = 0;
#endif
}
static ObjectClass *cris_cpu_class_by_name(const char *cpu_model)
{
ObjectClass *oc;
char *typename;
if (cpu_model == NULL) {
return NULL;
}
#if defined(CONFIG_USER_ONLY)
if (strcasecmp(cpu_model, "any") == 0) {
return object_class_by_name("crisv32-" TYPE_CRIS_CPU);
}
#endif
typename = g_strdup_printf("%s-" TYPE_CRIS_CPU, cpu_model);
oc = object_class_by_name(typename);
g_free(typename);
if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_CRIS_CPU) ||
object_class_is_abstract(oc))) {
oc = NULL;
}
return oc;
}
CRISCPU *cpu_cris_init(const char *cpu_model)
{
return CRIS_CPU(cpu_generic_init(TYPE_CRIS_CPU, cpu_model));
}
/* Sort alphabetically by VR. */
static gint cris_cpu_list_compare(gconstpointer a, gconstpointer b)
{
CRISCPUClass *ccc_a = CRIS_CPU_CLASS(a);
CRISCPUClass *ccc_b = CRIS_CPU_CLASS(b);
/* */
if (ccc_a->vr > ccc_b->vr) {
return 1;
} else if (ccc_a->vr < ccc_b->vr) {
return -1;
} else {
return 0;
}
}
static void cris_cpu_list_entry(gpointer data, gpointer user_data)
{
ObjectClass *oc = data;
CPUListState *s = user_data;
const char *typename = object_class_get_name(oc);
char *name;
name = g_strndup(typename, strlen(typename) - strlen("-" TYPE_CRIS_CPU));
(*s->cpu_fprintf)(s->file, " %s\n", name);
g_free(name);
}
void cris_cpu_list(FILE *f, fprintf_function cpu_fprintf)
{
CPUListState s = {
.file = f,
.cpu_fprintf = cpu_fprintf,
};
GSList *list;
list = object_class_get_list(TYPE_CRIS_CPU, false);
list = g_slist_sort(list, cris_cpu_list_compare);
(*cpu_fprintf)(f, "Available CPUs:\n");
g_slist_foreach(list, cris_cpu_list_entry, &s);
g_slist_free(list);
}
static void cris_cpu_realizefn(DeviceState *dev, Error **errp)
{
CPUState *cs = CPU(dev);
CRISCPUClass *ccc = CRIS_CPU_GET_CLASS(dev);
cpu_reset(cs);
qemu_init_vcpu(cs);
ccc->parent_realize(dev, errp);
}
#ifndef CONFIG_USER_ONLY
static void cris_cpu_set_irq(void *opaque, int irq, int level)
{
CRISCPU *cpu = opaque;
CPUState *cs = CPU(cpu);
int type = irq == CRIS_CPU_IRQ ? CPU_INTERRUPT_HARD : CPU_INTERRUPT_NMI;
if (level) {
cpu_interrupt(cs, type);
} else {
cpu_reset_interrupt(cs, type);
}
}
#endif
static void cris_cpu_initfn(Object *obj)
{
CPUState *cs = CPU(obj);
CRISCPU *cpu = CRIS_CPU(obj);
CRISCPUClass *ccc = CRIS_CPU_GET_CLASS(obj);
CPUCRISState *env = &cpu->env;
static bool tcg_initialized;
cs->env_ptr = env;
cpu_exec_init(env);
env->pregs[PR_VR] = ccc->vr;
#ifndef CONFIG_USER_ONLY
/* IRQ and NMI lines. */
qdev_init_gpio_in(DEVICE(cpu), cris_cpu_set_irq, 2);
#endif
if (tcg_enabled() && !tcg_initialized) {
tcg_initialized = true;
if (env->pregs[PR_VR] < 32) {
cris_initialize_crisv10_tcg();
} else {
cris_initialize_tcg();
}
}
}
static void crisv8_cpu_class_init(ObjectClass *oc, void *data)
{
CPUClass *cc = CPU_CLASS(oc);
CRISCPUClass *ccc = CRIS_CPU_CLASS(oc);
ccc->vr = 8;
cc->do_interrupt = crisv10_cpu_do_interrupt;
cc->gdb_read_register = crisv10_cpu_gdb_read_register;
}
static void crisv9_cpu_class_init(ObjectClass *oc, void *data)
{
CPUClass *cc = CPU_CLASS(oc);
CRISCPUClass *ccc = CRIS_CPU_CLASS(oc);
ccc->vr = 9;
cc->do_interrupt = crisv10_cpu_do_interrupt;
cc->gdb_read_register = crisv10_cpu_gdb_read_register;
}
static void crisv10_cpu_class_init(ObjectClass *oc, void *data)
{
CPUClass *cc = CPU_CLASS(oc);
CRISCPUClass *ccc = CRIS_CPU_CLASS(oc);
ccc->vr = 10;
cc->do_interrupt = crisv10_cpu_do_interrupt;
cc->gdb_read_register = crisv10_cpu_gdb_read_register;
}
static void crisv11_cpu_class_init(ObjectClass *oc, void *data)
{
CPUClass *cc = CPU_CLASS(oc);
CRISCPUClass *ccc = CRIS_CPU_CLASS(oc);
ccc->vr = 11;
cc->do_interrupt = crisv10_cpu_do_interrupt;
cc->gdb_read_register = crisv10_cpu_gdb_read_register;
}
static void crisv32_cpu_class_init(ObjectClass *oc, void *data)
{
CRISCPUClass *ccc = CRIS_CPU_CLASS(oc);
ccc->vr = 32;
}
#define TYPE(model) model "-" TYPE_CRIS_CPU
static const TypeInfo cris_cpu_model_type_infos[] = {
{
.name = TYPE("crisv8"),
.parent = TYPE_CRIS_CPU,
.class_init = crisv8_cpu_class_init,
}, {
.name = TYPE("crisv9"),
.parent = TYPE_CRIS_CPU,
.class_init = crisv9_cpu_class_init,
}, {
.name = TYPE("crisv10"),
.parent = TYPE_CRIS_CPU,
.class_init = crisv10_cpu_class_init,
}, {
.name = TYPE("crisv11"),
.parent = TYPE_CRIS_CPU,
.class_init = crisv11_cpu_class_init,
}, {
.name = TYPE("crisv32"),
.parent = TYPE_CRIS_CPU,
.class_init = crisv32_cpu_class_init,
}
};
#undef TYPE
static void cris_cpu_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
CPUClass *cc = CPU_CLASS(oc);
CRISCPUClass *ccc = CRIS_CPU_CLASS(oc);
ccc->parent_realize = dc->realize;
dc->realize = cris_cpu_realizefn;
ccc->parent_reset = cc->reset;
cc->reset = cris_cpu_reset;
cc->class_by_name = cris_cpu_class_by_name;
cc->has_work = cris_cpu_has_work;
cc->do_interrupt = cris_cpu_do_interrupt;
cc->dump_state = cris_cpu_dump_state;
cc->set_pc = cris_cpu_set_pc;
cc->gdb_read_register = cris_cpu_gdb_read_register;
cc->gdb_write_register = cris_cpu_gdb_write_register;
#ifdef CONFIG_USER_ONLY
cc->handle_mmu_fault = cris_cpu_handle_mmu_fault;
#else
cc->get_phys_page_debug = cris_cpu_get_phys_page_debug;
#endif
cc->gdb_num_core_regs = 49;
}
static const TypeInfo cris_cpu_type_info = {
.name = TYPE_CRIS_CPU,
.parent = TYPE_CPU,
.instance_size = sizeof(CRISCPU),
.instance_init = cris_cpu_initfn,
.abstract = true,
.class_size = sizeof(CRISCPUClass),
.class_init = cris_cpu_class_init,
};
static void cris_cpu_register_types(void)
{
int i;
type_register_static(&cris_cpu_type_info);
for (i = 0; i < ARRAY_SIZE(cris_cpu_model_type_infos); i++) {
type_register_static(&cris_cpu_model_type_infos[i]);
}
}
type_init(cris_cpu_register_types)