328 lines
8.2 KiB
C
328 lines
8.2 KiB
C
/*
|
|
* QEMU LatticeMico32 CPU
|
|
*
|
|
* 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 "qemu/osdep.h"
|
|
#include "cpu.h"
|
|
#include "qemu-common.h"
|
|
|
|
|
|
static void lm32_cpu_set_pc(CPUState *cs, vaddr value)
|
|
{
|
|
LM32CPU *cpu = LM32_CPU(cs);
|
|
|
|
cpu->env.pc = value;
|
|
}
|
|
|
|
/* Sort alphabetically by type name. */
|
|
static gint lm32_cpu_list_compare(gconstpointer a, gconstpointer b)
|
|
{
|
|
ObjectClass *class_a = (ObjectClass *)a;
|
|
ObjectClass *class_b = (ObjectClass *)b;
|
|
const char *name_a, *name_b;
|
|
|
|
name_a = object_class_get_name(class_a);
|
|
name_b = object_class_get_name(class_b);
|
|
return strcmp(name_a, name_b);
|
|
}
|
|
|
|
static void lm32_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_LM32_CPU));
|
|
(*s->cpu_fprintf)(s->file, " %s\n", name);
|
|
g_free(name);
|
|
}
|
|
|
|
|
|
void lm32_cpu_list(FILE *f, fprintf_function cpu_fprintf)
|
|
{
|
|
CPUListState s = {
|
|
.file = f,
|
|
.cpu_fprintf = cpu_fprintf,
|
|
};
|
|
GSList *list;
|
|
|
|
list = object_class_get_list(TYPE_LM32_CPU, false);
|
|
list = g_slist_sort(list, lm32_cpu_list_compare);
|
|
(*cpu_fprintf)(f, "Available CPUs:\n");
|
|
g_slist_foreach(list, lm32_cpu_list_entry, &s);
|
|
g_slist_free(list);
|
|
}
|
|
|
|
static void lm32_cpu_init_cfg_reg(LM32CPU *cpu)
|
|
{
|
|
CPULM32State *env = &cpu->env;
|
|
uint32_t cfg = 0;
|
|
|
|
if (cpu->features & LM32_FEATURE_MULTIPLY) {
|
|
cfg |= CFG_M;
|
|
}
|
|
|
|
if (cpu->features & LM32_FEATURE_DIVIDE) {
|
|
cfg |= CFG_D;
|
|
}
|
|
|
|
if (cpu->features & LM32_FEATURE_SHIFT) {
|
|
cfg |= CFG_S;
|
|
}
|
|
|
|
if (cpu->features & LM32_FEATURE_SIGN_EXTEND) {
|
|
cfg |= CFG_X;
|
|
}
|
|
|
|
if (cpu->features & LM32_FEATURE_I_CACHE) {
|
|
cfg |= CFG_IC;
|
|
}
|
|
|
|
if (cpu->features & LM32_FEATURE_D_CACHE) {
|
|
cfg |= CFG_DC;
|
|
}
|
|
|
|
if (cpu->features & LM32_FEATURE_CYCLE_COUNT) {
|
|
cfg |= CFG_CC;
|
|
}
|
|
|
|
cfg |= (cpu->num_interrupts << CFG_INT_SHIFT);
|
|
cfg |= (cpu->num_breakpoints << CFG_BP_SHIFT);
|
|
cfg |= (cpu->num_watchpoints << CFG_WP_SHIFT);
|
|
cfg |= (cpu->revision << CFG_REV_SHIFT);
|
|
|
|
env->cfg = cfg;
|
|
}
|
|
|
|
static bool lm32_cpu_has_work(CPUState *cs)
|
|
{
|
|
return cs->interrupt_request & CPU_INTERRUPT_HARD;
|
|
}
|
|
|
|
/* CPUClass::reset() */
|
|
static void lm32_cpu_reset(CPUState *s)
|
|
{
|
|
LM32CPU *cpu = LM32_CPU(s);
|
|
LM32CPUClass *lcc = LM32_CPU_GET_CLASS(cpu);
|
|
CPULM32State *env = &cpu->env;
|
|
|
|
lcc->parent_reset(s);
|
|
|
|
/* reset cpu state */
|
|
memset(env, 0, offsetof(CPULM32State, eba));
|
|
|
|
lm32_cpu_init_cfg_reg(cpu);
|
|
tlb_flush(s, 1);
|
|
}
|
|
|
|
static void lm32_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
|
|
{
|
|
info->mach = bfd_mach_lm32;
|
|
info->print_insn = print_insn_lm32;
|
|
}
|
|
|
|
static void lm32_cpu_realizefn(DeviceState *dev, Error **errp)
|
|
{
|
|
CPUState *cs = CPU(dev);
|
|
LM32CPUClass *lcc = LM32_CPU_GET_CLASS(dev);
|
|
|
|
cpu_reset(cs);
|
|
|
|
qemu_init_vcpu(cs);
|
|
|
|
lcc->parent_realize(dev, errp);
|
|
}
|
|
|
|
static void lm32_cpu_initfn(Object *obj)
|
|
{
|
|
CPUState *cs = CPU(obj);
|
|
LM32CPU *cpu = LM32_CPU(obj);
|
|
CPULM32State *env = &cpu->env;
|
|
static bool tcg_initialized;
|
|
|
|
cs->env_ptr = env;
|
|
cpu_exec_init(cs, &error_abort);
|
|
|
|
env->flags = 0;
|
|
|
|
if (tcg_enabled() && !tcg_initialized) {
|
|
tcg_initialized = true;
|
|
lm32_translate_init();
|
|
}
|
|
}
|
|
|
|
static void lm32_basic_cpu_initfn(Object *obj)
|
|
{
|
|
LM32CPU *cpu = LM32_CPU(obj);
|
|
|
|
cpu->revision = 3;
|
|
cpu->num_interrupts = 32;
|
|
cpu->num_breakpoints = 4;
|
|
cpu->num_watchpoints = 4;
|
|
cpu->features = LM32_FEATURE_SHIFT
|
|
| LM32_FEATURE_SIGN_EXTEND
|
|
| LM32_FEATURE_CYCLE_COUNT;
|
|
}
|
|
|
|
static void lm32_standard_cpu_initfn(Object *obj)
|
|
{
|
|
LM32CPU *cpu = LM32_CPU(obj);
|
|
|
|
cpu->revision = 3;
|
|
cpu->num_interrupts = 32;
|
|
cpu->num_breakpoints = 4;
|
|
cpu->num_watchpoints = 4;
|
|
cpu->features = LM32_FEATURE_MULTIPLY
|
|
| LM32_FEATURE_DIVIDE
|
|
| LM32_FEATURE_SHIFT
|
|
| LM32_FEATURE_SIGN_EXTEND
|
|
| LM32_FEATURE_I_CACHE
|
|
| LM32_FEATURE_CYCLE_COUNT;
|
|
}
|
|
|
|
static void lm32_full_cpu_initfn(Object *obj)
|
|
{
|
|
LM32CPU *cpu = LM32_CPU(obj);
|
|
|
|
cpu->revision = 3;
|
|
cpu->num_interrupts = 32;
|
|
cpu->num_breakpoints = 4;
|
|
cpu->num_watchpoints = 4;
|
|
cpu->features = LM32_FEATURE_MULTIPLY
|
|
| LM32_FEATURE_DIVIDE
|
|
| LM32_FEATURE_SHIFT
|
|
| LM32_FEATURE_SIGN_EXTEND
|
|
| LM32_FEATURE_I_CACHE
|
|
| LM32_FEATURE_D_CACHE
|
|
| LM32_FEATURE_CYCLE_COUNT;
|
|
}
|
|
|
|
typedef struct LM32CPUInfo {
|
|
const char *name;
|
|
void (*initfn)(Object *obj);
|
|
} LM32CPUInfo;
|
|
|
|
static const LM32CPUInfo lm32_cpus[] = {
|
|
{
|
|
.name = "lm32-basic",
|
|
.initfn = lm32_basic_cpu_initfn,
|
|
},
|
|
{
|
|
.name = "lm32-standard",
|
|
.initfn = lm32_standard_cpu_initfn,
|
|
},
|
|
{
|
|
.name = "lm32-full",
|
|
.initfn = lm32_full_cpu_initfn,
|
|
},
|
|
};
|
|
|
|
static ObjectClass *lm32_cpu_class_by_name(const char *cpu_model)
|
|
{
|
|
ObjectClass *oc;
|
|
char *typename;
|
|
|
|
if (cpu_model == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
typename = g_strdup_printf("%s-" TYPE_LM32_CPU, cpu_model);
|
|
oc = object_class_by_name(typename);
|
|
g_free(typename);
|
|
if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_LM32_CPU) ||
|
|
object_class_is_abstract(oc))) {
|
|
oc = NULL;
|
|
}
|
|
return oc;
|
|
}
|
|
|
|
static void lm32_cpu_class_init(ObjectClass *oc, void *data)
|
|
{
|
|
LM32CPUClass *lcc = LM32_CPU_CLASS(oc);
|
|
CPUClass *cc = CPU_CLASS(oc);
|
|
DeviceClass *dc = DEVICE_CLASS(oc);
|
|
|
|
lcc->parent_realize = dc->realize;
|
|
dc->realize = lm32_cpu_realizefn;
|
|
|
|
lcc->parent_reset = cc->reset;
|
|
cc->reset = lm32_cpu_reset;
|
|
|
|
cc->class_by_name = lm32_cpu_class_by_name;
|
|
cc->has_work = lm32_cpu_has_work;
|
|
cc->do_interrupt = lm32_cpu_do_interrupt;
|
|
cc->cpu_exec_interrupt = lm32_cpu_exec_interrupt;
|
|
cc->dump_state = lm32_cpu_dump_state;
|
|
cc->set_pc = lm32_cpu_set_pc;
|
|
cc->gdb_read_register = lm32_cpu_gdb_read_register;
|
|
cc->gdb_write_register = lm32_cpu_gdb_write_register;
|
|
#ifdef CONFIG_USER_ONLY
|
|
cc->handle_mmu_fault = lm32_cpu_handle_mmu_fault;
|
|
#else
|
|
cc->get_phys_page_debug = lm32_cpu_get_phys_page_debug;
|
|
cc->vmsd = &vmstate_lm32_cpu;
|
|
#endif
|
|
cc->gdb_num_core_regs = 32 + 7;
|
|
cc->gdb_stop_before_watchpoint = true;
|
|
cc->debug_excp_handler = lm32_debug_excp_handler;
|
|
cc->disas_set_info = lm32_cpu_disas_set_info;
|
|
|
|
/*
|
|
* Reason: lm32_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 lm32_register_cpu_type(const LM32CPUInfo *info)
|
|
{
|
|
TypeInfo type_info = {
|
|
.parent = TYPE_LM32_CPU,
|
|
.instance_init = info->initfn,
|
|
};
|
|
|
|
type_info.name = g_strdup_printf("%s-" TYPE_LM32_CPU, info->name);
|
|
type_register(&type_info);
|
|
g_free((void *)type_info.name);
|
|
}
|
|
|
|
static const TypeInfo lm32_cpu_type_info = {
|
|
.name = TYPE_LM32_CPU,
|
|
.parent = TYPE_CPU,
|
|
.instance_size = sizeof(LM32CPU),
|
|
.instance_init = lm32_cpu_initfn,
|
|
.abstract = true,
|
|
.class_size = sizeof(LM32CPUClass),
|
|
.class_init = lm32_cpu_class_init,
|
|
};
|
|
|
|
static void lm32_cpu_register_types(void)
|
|
{
|
|
int i;
|
|
|
|
type_register_static(&lm32_cpu_type_info);
|
|
for (i = 0; i < ARRAY_SIZE(lm32_cpus); i++) {
|
|
lm32_register_cpu_type(&lm32_cpus[i]);
|
|
}
|
|
}
|
|
|
|
type_init(lm32_cpu_register_types)
|