unicorn/qemu/target/m68k/cpu.c
Laurent Vivier f7ef6b49a8
target-m68k: add FPCR and FPSR
Backports commit ba62494483ab51ee31c70952b6ce5171a31860b1 from qemu
2018-03-03 19:51:31 -05:00

308 lines
8.7 KiB
C

/*
* QEMU Motorola 68k 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 "qapi/error.h"
#include "hw/m68k/m68k.h"
#include "cpu.h"
#include "qemu-common.h"
#include "exec/exec-all.h"
static void m68k_cpu_set_pc(CPUState *cs, vaddr value)
{
M68kCPU *cpu = M68K_CPU(cs->uc, cs);
cpu->env.pc = value;
}
static bool m68k_cpu_has_work(CPUState *cs)
{
return cs->interrupt_request & CPU_INTERRUPT_HARD;
}
static void m68k_set_feature(CPUM68KState *env, int feature)
{
env->features |= (1u << feature);
}
/* CPUClass::reset() */
static void m68k_cpu_reset(CPUState *s)
{
M68kCPU *cpu = M68K_CPU(s->uc, s);
M68kCPUClass *mcc = M68K_CPU_GET_CLASS(s->uc, cpu);
CPUM68KState *env = &cpu->env;
floatx80 nan = floatx80_default_nan(NULL);
int i;
mcc->parent_reset(s);
memset(env, 0, offsetof(CPUM68KState, end_reset_fields));
#if !defined(CONFIG_USER_ONLY)
env->sr = 0x2700;
#endif
m68k_switch_sp(env);
for (i = 0; i < 8; i++) {
env->fregs[i].d = nan;
}
cpu_m68k_set_fpcr(env, 0);
env->fpsr = 0;
cpu_m68k_set_ccr(env, 0);
/* TODO: We should set PC from the interrupt vector. */
env->pc = 0;
}
/* CPU models */
static ObjectClass *m68k_cpu_class_by_name(struct uc_struct *uc, const char *cpu_model)
{
ObjectClass *oc;
char *typename;
if (cpu_model == NULL) {
return NULL;
}
typename = g_strdup_printf("%s-" TYPE_M68K_CPU, cpu_model);
oc = object_class_by_name(uc, typename);
g_free(typename);
if (oc != NULL && (object_class_dynamic_cast(uc, oc, TYPE_M68K_CPU) == NULL ||
object_class_is_abstract(oc))) {
return NULL;
}
return oc;
}
static void m5206_cpu_initfn(struct uc_struct *uc, Object *obj, void *opaque)
{
M68kCPU *cpu = M68K_CPU(uc, obj);
CPUM68KState *env = &cpu->env;
m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
}
static void m68000_cpu_initfn(struct uc_struct *uc, Object *obj, void *opaque)
{
M68kCPU *cpu = M68K_CPU(uc, obj);
CPUM68KState *env = &cpu->env;
m68k_set_feature(env, M68K_FEATURE_M68000);
m68k_set_feature(env, M68K_FEATURE_USP);
m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
}
static void m68020_cpu_initfn(struct uc_struct *uc, Object *obj, void *opaque)
{
M68kCPU *cpu = M68K_CPU(uc, obj);
CPUM68KState *env = &cpu->env;
m68k_set_feature(env, M68K_FEATURE_M68000);
m68k_set_feature(env, M68K_FEATURE_USP);
m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
m68k_set_feature(env, M68K_FEATURE_QUAD_MULDIV);
m68k_set_feature(env, M68K_FEATURE_BRAL);
m68k_set_feature(env, M68K_FEATURE_BCCL);
m68k_set_feature(env, M68K_FEATURE_BITFIELD);
m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
m68k_set_feature(env, M68K_FEATURE_FPU);
m68k_set_feature(env, M68K_FEATURE_CAS);
m68k_set_feature(env, M68K_FEATURE_BKPT);
m68k_set_feature(env, M68K_FEATURE_RTD);
}
#define m68030_cpu_initfn m68020_cpu_initfn
#define m68040_cpu_initfn m68020_cpu_initfn
static void m68060_cpu_initfn(struct uc_struct *uc, Object *obj, void *opaque)
{
M68kCPU *cpu = M68K_CPU(uc, obj);
CPUM68KState *env = &cpu->env;
m68k_set_feature(env, M68K_FEATURE_M68000);
m68k_set_feature(env, M68K_FEATURE_USP);
m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
m68k_set_feature(env, M68K_FEATURE_BRAL);
m68k_set_feature(env, M68K_FEATURE_BCCL);
m68k_set_feature(env, M68K_FEATURE_BITFIELD);
m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
m68k_set_feature(env, M68K_FEATURE_FPU);
m68k_set_feature(env, M68K_FEATURE_CAS);
m68k_set_feature(env, M68K_FEATURE_BKPT);
m68k_set_feature(env, M68K_FEATURE_RTD);
}
static void m5208_cpu_initfn(struct uc_struct *uc, Object *obj, void *opaque)
{
M68kCPU *cpu = M68K_CPU(uc, obj);
CPUM68KState *env = &cpu->env;
m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
m68k_set_feature(env, M68K_FEATURE_BRAL);
m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
m68k_set_feature(env, M68K_FEATURE_USP);
}
static void cfv4e_cpu_initfn(struct uc_struct *uc, Object *obj, void *opaque)
{
M68kCPU *cpu = M68K_CPU(uc, obj);
CPUM68KState *env = &cpu->env;
m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
m68k_set_feature(env, M68K_FEATURE_BRAL);
m68k_set_feature(env, M68K_FEATURE_CF_FPU);
m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
m68k_set_feature(env, M68K_FEATURE_USP);
}
static void any_cpu_initfn(struct uc_struct *uc, Object *obj, void *opaque)
{
M68kCPU *cpu = M68K_CPU(uc, obj);
CPUM68KState *env = &cpu->env;
m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
m68k_set_feature(env, M68K_FEATURE_BRAL);
m68k_set_feature(env, M68K_FEATURE_CF_FPU);
/* MAC and EMAC are mututally exclusive, so pick EMAC.
It's mostly backwards compatible. */
m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B);
m68k_set_feature(env, M68K_FEATURE_USP);
m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
}
typedef struct M68kCPUInfo {
const char *name;
void (*instance_init)(struct uc_struct *uc, Object *obj, void *opaque);
} M68kCPUInfo;
static const M68kCPUInfo m68k_cpus[] = {
{ "m68000", m68000_cpu_initfn },
{ "m68020", m68020_cpu_initfn },
{ "m68030", m68030_cpu_initfn },
{ "m68040", m68040_cpu_initfn },
{ "m68060", m68060_cpu_initfn },
{ "m5206", m5206_cpu_initfn },
{ "m5208", m5208_cpu_initfn },
{ "cfv4e", cfv4e_cpu_initfn },
{ "any", any_cpu_initfn },
};
static int m68k_cpu_realizefn(struct uc_struct *uc, DeviceState *dev, Error **errp)
{
CPUState *cs = CPU(dev);
M68kCPUClass *mcc = M68K_CPU_GET_CLASS(uc, dev);
cpu_reset(cs);
qemu_init_vcpu(cs);
mcc->parent_realize(cs->uc, dev, errp);
return 0;
}
static void m68k_cpu_initfn(struct uc_struct *uc, Object *obj, void *opaque)
{
CPUState *cs = CPU(obj);
M68kCPU *cpu = M68K_CPU(uc, obj);
CPUM68KState *env = &cpu->env;
cs->env_ptr = env;
cpu_exec_init(cs, opaque);
if (tcg_enabled(uc)) {
m68k_tcg_init(uc);
}
}
static void m68k_cpu_class_init(struct uc_struct *uc, ObjectClass *c, void *data)
{
M68kCPUClass *mcc = M68K_CPU_CLASS(uc, c);
CPUClass *cc = CPU_CLASS(uc, c);
DeviceClass *dc = DEVICE_CLASS(uc, c);
mcc->parent_realize = dc->realize;
dc->realize = m68k_cpu_realizefn;
mcc->parent_reset = cc->reset;
cc->reset = m68k_cpu_reset;
cc->class_by_name = m68k_cpu_class_by_name;
cc->has_work = m68k_cpu_has_work;
cc->do_interrupt = m68k_cpu_do_interrupt;
cc->cpu_exec_interrupt = m68k_cpu_exec_interrupt;
cc->set_pc = m68k_cpu_set_pc;
#ifdef CONFIG_USER_ONLY
cc->handle_mmu_fault = m68k_cpu_handle_mmu_fault;
#else
cc->get_phys_page_debug = m68k_cpu_get_phys_page_debug;
#endif
}
static void register_cpu_type(void *opaque, const M68kCPUInfo *info)
{
TypeInfo type_info = {0};
type_info.parent = TYPE_M68K_CPU,
type_info.instance_init = info->instance_init,
type_info.name = g_strdup_printf("%s-" TYPE_M68K_CPU, info->name);
type_register(opaque, &type_info);
g_free((void *)type_info.name);
}
void m68k_cpu_register_types(void *opaque)
{
const TypeInfo m68k_cpu_type_info = {
TYPE_M68K_CPU,
TYPE_CPU,
sizeof(M68kCPUClass),
sizeof(M68kCPU),
opaque,
m68k_cpu_initfn,
NULL,
NULL,
NULL,
m68k_cpu_class_init,
NULL,
NULL,
true,
};
int i;
type_register_static(opaque, &m68k_cpu_type_info);
for (i = 0; i < ARRAY_SIZE(m68k_cpus); i++) {
register_cpu_type(opaque, &m68k_cpus[i]);
}
}