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qemu/target/m68k/cpu.c

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/*
* 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 "cpu.h"
#include "migration/vmstate.h"
#include "fpu/softfloat.h"
static void m68k_cpu_set_pc(CPUState *cs, vaddr value)
{
M68kCPU *cpu = M68K_CPU(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);
}
static void m68k_unset_feature(CPUM68KState *env, int feature)
{
env->features &= (-1u - (1u << feature));
}
static void m68k_cpu_reset(DeviceState *dev)
{
CPUState *s = CPU(dev);
M68kCPU *cpu = M68K_CPU(s);
M68kCPUClass *mcc = M68K_CPU_GET_CLASS(cpu);
CPUM68KState *env = &cpu->env;
floatx80 nan = floatx80_default_nan(NULL);
int i;
mcc->parent_reset(dev);
memset(env, 0, offsetof(CPUM68KState, end_reset_fields));
#ifdef CONFIG_SOFTMMU
cpu_m68k_set_sr(env, SR_S | SR_I);
#else
cpu_m68k_set_sr(env, 0);
#endif
for (i = 0; i < 8; i++) {
env->fregs[i].d = nan;
}
cpu_m68k_set_fpcr(env, 0);
env->fpsr = 0;
/* TODO: We should set PC from the interrupt vector. */
env->pc = 0;
}
static void m68k_cpu_disas_set_info(CPUState *s, disassemble_info *info)
{
M68kCPU *cpu = M68K_CPU(s);
CPUM68KState *env = &cpu->env;
info->print_insn = print_insn_m68k;
if (m68k_feature(env, M68K_FEATURE_M68000)) {
info->mach = bfd_mach_m68040;
}
}
/* CPU models */
static ObjectClass *m68k_cpu_class_by_name(const char *cpu_model)
{
ObjectClass *oc;
char *typename;
typename = g_strdup_printf(M68K_CPU_TYPE_NAME("%s"), cpu_model);
oc = object_class_by_name(typename);
g_free(typename);
if (oc != NULL && (object_class_dynamic_cast(oc, TYPE_M68K_CPU) == NULL ||
object_class_is_abstract(oc))) {
return NULL;
}
return oc;
}
static void m5206_cpu_initfn(Object *obj)
{
M68kCPU *cpu = M68K_CPU(obj);
CPUM68KState *env = &cpu->env;
m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
}
/* Base feature set, including isns. for m68k family */
static void m68000_cpu_initfn(Object *obj)
{
M68kCPU *cpu = M68K_CPU(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_MOVEP);
}
/*
* Adds BKPT, MOVE-from-SR *now priv instr, and MOVEC, MOVES, RTD
*/
static void m68010_cpu_initfn(Object *obj)
{
M68kCPU *cpu = M68K_CPU(obj);
CPUM68KState *env = &cpu->env;
m68000_cpu_initfn(obj);
m68k_set_feature(env, M68K_FEATURE_M68010);
m68k_set_feature(env, M68K_FEATURE_RTD);
m68k_set_feature(env, M68K_FEATURE_BKPT);
m68k_set_feature(env, M68K_FEATURE_MOVEC);
}
/*
* Adds BFCHG, BFCLR, BFEXTS, BFEXTU, BFFFO, BFINS, BFSET, BFTST, CAS, CAS2,
* CHK2, CMP2, DIVSL, DIVUL, EXTB, PACK, TRAPcc, UNPK.
*
* 68020/30 only:
* CALLM, cpBcc, cpDBcc, cpGEN, cpRESTORE, cpSAVE, cpScc, cpTRAPcc
*/
static void m68020_cpu_initfn(Object *obj)
{
M68kCPU *cpu = M68K_CPU(obj);
CPUM68KState *env = &cpu->env;
m68010_cpu_initfn(obj);
m68k_unset_feature(env, M68K_FEATURE_M68010);
m68k_set_feature(env, M68K_FEATURE_M68020);
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_CHK2);
m68k_set_feature(env, M68K_FEATURE_MSP);
m68k_set_feature(env, M68K_FEATURE_UNALIGNED_DATA);
}
/*
* Adds: PFLUSH (*5)
* 68030 Only: PFLUSHA (*5), PLOAD (*5), PMOVE
* 68030/40 Only: PTEST
*
* NOTES:
* 5. Not valid on MC68EC030
*/
static void m68030_cpu_initfn(Object *obj)
{
M68kCPU *cpu = M68K_CPU(obj);
CPUM68KState *env = &cpu->env;
m68020_cpu_initfn(obj);
m68k_unset_feature(env, M68K_FEATURE_M68020);
m68k_set_feature(env, M68K_FEATURE_M68030);
}
/*
* Adds: CINV, CPUSH
* Adds all with Note *2: FABS, FSABS, FDABS, FADD, FSADD, FDADD, FBcc, FCMP,
* FDBcc, FDIV, FSDIV, FDDIV, FMOVE, FSMOVE, FDMOVE,
* FMOVEM, FMUL, FSMUL, FDMUL, FNEG, FSNEG, FDNEG, FNOP,
* FRESTORE, FSAVE, FScc, FSQRT, FSSQRT, FDSQRT, FSUB,
* FSSUB, FDSUB, FTRAPcc, FTST
*
* Adds with Notes *2, and *3: FACOS, FASIN, FATAN, FATANH, FCOS, FCOSH, FETOX,
* FETOXM, FGETEXP, FGETMAN, FINT, FINTRZ, FLOG10,
* FLOG2, FLOGN, FLOGNP1, FMOD, FMOVECR, FREM,
* FSCALE, FSGLDIV, FSGLMUL, FSIN, FSINCOS, FSINH,
* FTAN, FTANH, FTENTOX, FTWOTOX
* NOTES:
* 2. Not applicable to the MC68EC040, MC68LC040, MC68EC060, and MC68LC060.
* 3. These are software-supported instructions on the MC68040 and MC68060.
*/
static void m68040_cpu_initfn(Object *obj)
{
M68kCPU *cpu = M68K_CPU(obj);
CPUM68KState *env = &cpu->env;
m68030_cpu_initfn(obj);
m68k_unset_feature(env, M68K_FEATURE_M68030);
m68k_set_feature(env, M68K_FEATURE_M68040);
}
/*
* Adds: PLPA
* Adds all with Note *2: CAS, CAS2, MULS, MULU, CHK2, CMP2, DIVS, DIVU
* All Fxxxx instructions are as per m68040 with exception to; FMOVEM NOTE3
*
* Does NOT implement MOVEP
*
* NOTES:
* 2. Not applicable to the MC68EC040, MC68LC040, MC68EC060, and MC68LC060.
* 3. These are software-supported instructions on the MC68040 and MC68060.
*/
static void m68060_cpu_initfn(Object *obj)
{
M68kCPU *cpu = M68K_CPU(obj);
CPUM68KState *env = &cpu->env;
m68040_cpu_initfn(obj);
m68k_unset_feature(env, M68K_FEATURE_M68040);
m68k_set_feature(env, M68K_FEATURE_M68060);
m68k_unset_feature(env, M68K_FEATURE_MOVEP);
/* Implemented as a software feature */
m68k_unset_feature(env, M68K_FEATURE_QUAD_MULDIV);
}
static void m5208_cpu_initfn(Object *obj)
{
M68kCPU *cpu = M68K_CPU(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(Object *obj)
{
M68kCPU *cpu = M68K_CPU(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(Object *obj)
{
M68kCPU *cpu = M68K_CPU(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);
}
static void m68k_cpu_realizefn(DeviceState *dev, Error **errp)
{
CPUState *cs = CPU(dev);
M68kCPU *cpu = M68K_CPU(dev);
M68kCPUClass *mcc = M68K_CPU_GET_CLASS(dev);
Error *local_err = NULL;
register_m68k_insns(&cpu->env);
cpu_exec_realizefn(cs, &local_err);
if (local_err != NULL) {
error_propagate(errp, local_err);
return;
}
m68k_cpu_init_gdb(cpu);
cpu_reset(cs);
qemu_init_vcpu(cs);
mcc->parent_realize(dev, errp);
}
static void m68k_cpu_initfn(Object *obj)
{
M68kCPU *cpu = M68K_CPU(obj);
cpu_set_cpustate_pointers(cpu);
}
#if defined(CONFIG_SOFTMMU)
static bool fpu_needed(void *opaque)
{
M68kCPU *s = opaque;
return m68k_feature(&s->env, M68K_FEATURE_CF_FPU) ||
m68k_feature(&s->env, M68K_FEATURE_FPU);
}
typedef struct m68k_FPReg_tmp {
FPReg *parent;
uint64_t tmp_mant;
uint16_t tmp_exp;
} m68k_FPReg_tmp;
static void cpu_get_fp80(uint64_t *pmant, uint16_t *pexp, floatx80 f)
{
CPU_LDoubleU temp;
temp.d = f;
*pmant = temp.l.lower;
*pexp = temp.l.upper;
}
static floatx80 cpu_set_fp80(uint64_t mant, uint16_t upper)
{
CPU_LDoubleU temp;
temp.l.upper = upper;
temp.l.lower = mant;
return temp.d;
}
static int freg_pre_save(void *opaque)
{
m68k_FPReg_tmp *tmp = opaque;
cpu_get_fp80(&tmp->tmp_mant, &tmp->tmp_exp, tmp->parent->d);
return 0;
}
static int freg_post_load(void *opaque, int version)
{
m68k_FPReg_tmp *tmp = opaque;
tmp->parent->d = cpu_set_fp80(tmp->tmp_mant, tmp->tmp_exp);
return 0;
}
static const VMStateDescription vmstate_freg_tmp = {
.name = "freg_tmp",
.post_load = freg_post_load,
.pre_save = freg_pre_save,
.fields = (VMStateField[]) {
VMSTATE_UINT64(tmp_mant, m68k_FPReg_tmp),
VMSTATE_UINT16(tmp_exp, m68k_FPReg_tmp),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_freg = {
.name = "freg",
.fields = (VMStateField[]) {
VMSTATE_WITH_TMP(FPReg, m68k_FPReg_tmp, vmstate_freg_tmp),
VMSTATE_END_OF_LIST()
}
};
static int fpu_post_load(void *opaque, int version)
{
M68kCPU *s = opaque;
cpu_m68k_restore_fp_status(&s->env);
return 0;
}
const VMStateDescription vmmstate_fpu = {
.name = "cpu/fpu",
.version_id = 1,
.minimum_version_id = 1,
.needed = fpu_needed,
.post_load = fpu_post_load,
.fields = (VMStateField[]) {
VMSTATE_UINT32(env.fpcr, M68kCPU),
VMSTATE_UINT32(env.fpsr, M68kCPU),
VMSTATE_STRUCT_ARRAY(env.fregs, M68kCPU, 8, 0, vmstate_freg, FPReg),
VMSTATE_STRUCT(env.fp_result, M68kCPU, 0, vmstate_freg, FPReg),
VMSTATE_END_OF_LIST()
}
};
static bool cf_spregs_needed(void *opaque)
{
M68kCPU *s = opaque;
return m68k_feature(&s->env, M68K_FEATURE_CF_ISA_A);
}
const VMStateDescription vmstate_cf_spregs = {
.name = "cpu/cf_spregs",
.version_id = 1,
.minimum_version_id = 1,
.needed = cf_spregs_needed,
.fields = (VMStateField[]) {
VMSTATE_UINT64_ARRAY(env.macc, M68kCPU, 4),
VMSTATE_UINT32(env.macsr, M68kCPU),
VMSTATE_UINT32(env.mac_mask, M68kCPU),
VMSTATE_UINT32(env.rambar0, M68kCPU),
VMSTATE_UINT32(env.mbar, M68kCPU),
VMSTATE_END_OF_LIST()
}
};
static bool cpu_68040_mmu_needed(void *opaque)
{
M68kCPU *s = opaque;
return m68k_feature(&s->env, M68K_FEATURE_M68040);
}
const VMStateDescription vmstate_68040_mmu = {
.name = "cpu/68040_mmu",
.version_id = 1,
.minimum_version_id = 1,
.needed = cpu_68040_mmu_needed,
.fields = (VMStateField[]) {
VMSTATE_UINT32(env.mmu.ar, M68kCPU),
VMSTATE_UINT32(env.mmu.ssw, M68kCPU),
VMSTATE_UINT16(env.mmu.tcr, M68kCPU),
VMSTATE_UINT32(env.mmu.urp, M68kCPU),
VMSTATE_UINT32(env.mmu.srp, M68kCPU),
VMSTATE_BOOL(env.mmu.fault, M68kCPU),
VMSTATE_UINT32_ARRAY(env.mmu.ttr, M68kCPU, 4),
VMSTATE_UINT32(env.mmu.mmusr, M68kCPU),
VMSTATE_END_OF_LIST()
}
};
static bool cpu_68040_spregs_needed(void *opaque)
{
M68kCPU *s = opaque;
return m68k_feature(&s->env, M68K_FEATURE_M68040);
}
const VMStateDescription vmstate_68040_spregs = {
.name = "cpu/68040_spregs",
.version_id = 1,
.minimum_version_id = 1,
.needed = cpu_68040_spregs_needed,
.fields = (VMStateField[]) {
VMSTATE_UINT32(env.vbr, M68kCPU),
VMSTATE_UINT32(env.cacr, M68kCPU),
VMSTATE_UINT32(env.sfc, M68kCPU),
VMSTATE_UINT32(env.dfc, M68kCPU),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_m68k_cpu = {
.name = "cpu",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32_ARRAY(env.dregs, M68kCPU, 8),
VMSTATE_UINT32_ARRAY(env.aregs, M68kCPU, 8),
VMSTATE_UINT32(env.pc, M68kCPU),
VMSTATE_UINT32(env.sr, M68kCPU),
VMSTATE_INT32(env.current_sp, M68kCPU),
VMSTATE_UINT32_ARRAY(env.sp, M68kCPU, 3),
VMSTATE_UINT32(env.cc_op, M68kCPU),
VMSTATE_UINT32(env.cc_x, M68kCPU),
VMSTATE_UINT32(env.cc_n, M68kCPU),
VMSTATE_UINT32(env.cc_v, M68kCPU),
VMSTATE_UINT32(env.cc_c, M68kCPU),
VMSTATE_UINT32(env.cc_z, M68kCPU),
VMSTATE_INT32(env.pending_vector, M68kCPU),
VMSTATE_INT32(env.pending_level, M68kCPU),
VMSTATE_END_OF_LIST()
},
.subsections = (const VMStateDescription * []) {
&vmmstate_fpu,
&vmstate_cf_spregs,
&vmstate_68040_mmu,
&vmstate_68040_spregs,
NULL
},
};
#endif
#ifndef CONFIG_USER_ONLY
#include "hw/core/sysemu-cpu-ops.h"
static const struct SysemuCPUOps m68k_sysemu_ops = {
.get_phys_page_debug = m68k_cpu_get_phys_page_debug,
};
#endif
#include "hw/core/tcg-cpu-ops.h"
static const struct TCGCPUOps m68k_tcg_ops = {
.initialize = m68k_tcg_init,
.tlb_fill = m68k_cpu_tlb_fill,
#ifndef CONFIG_USER_ONLY
.cpu_exec_interrupt = m68k_cpu_exec_interrupt,
.do_interrupt = m68k_cpu_do_interrupt,
.do_transaction_failed = m68k_cpu_transaction_failed,
#endif /* !CONFIG_USER_ONLY */
};
static void m68k_cpu_class_init(ObjectClass *c, void *data)
{
M68kCPUClass *mcc = M68K_CPU_CLASS(c);
CPUClass *cc = CPU_CLASS(c);
DeviceClass *dc = DEVICE_CLASS(c);
device_class_set_parent_realize(dc, m68k_cpu_realizefn,
&mcc->parent_realize);
device_class_set_parent_reset(dc, m68k_cpu_reset, &mcc->parent_reset);
cc->class_by_name = m68k_cpu_class_by_name;
cc->has_work = m68k_cpu_has_work;
cc->dump_state = m68k_cpu_dump_state;
cc->set_pc = m68k_cpu_set_pc;
cc->gdb_read_register = m68k_cpu_gdb_read_register;
cc->gdb_write_register = m68k_cpu_gdb_write_register;
#if defined(CONFIG_SOFTMMU)
dc->vmsd = &vmstate_m68k_cpu;
cc->sysemu_ops = &m68k_sysemu_ops;
#endif
cc->disas_set_info = m68k_cpu_disas_set_info;
cc->gdb_num_core_regs = 18;
cc->tcg_ops = &m68k_tcg_ops;
}
static void m68k_cpu_class_init_cf_core(ObjectClass *c, void *data)
{
CPUClass *cc = CPU_CLASS(c);
cc->gdb_core_xml_file = "cf-core.xml";
}
#define DEFINE_M68K_CPU_TYPE_CF(model) \
{ \
.name = M68K_CPU_TYPE_NAME(#model), \
.instance_init = model##_cpu_initfn, \
.parent = TYPE_M68K_CPU, \
.class_init = m68k_cpu_class_init_cf_core \
}
static void m68k_cpu_class_init_m68k_core(ObjectClass *c, void *data)
{
CPUClass *cc = CPU_CLASS(c);
cc->gdb_core_xml_file = "m68k-core.xml";
}
#define DEFINE_M68K_CPU_TYPE_M68K(model) \
{ \
.name = M68K_CPU_TYPE_NAME(#model), \
.instance_init = model##_cpu_initfn, \
.parent = TYPE_M68K_CPU, \
.class_init = m68k_cpu_class_init_m68k_core \
}
static const TypeInfo m68k_cpus_type_infos[] = {
{ /* base class should be registered first */
.name = TYPE_M68K_CPU,
.parent = TYPE_CPU,
.instance_size = sizeof(M68kCPU),
.instance_init = m68k_cpu_initfn,
.abstract = true,
.class_size = sizeof(M68kCPUClass),
.class_init = m68k_cpu_class_init,
},
DEFINE_M68K_CPU_TYPE_M68K(m68000),
DEFINE_M68K_CPU_TYPE_M68K(m68010),
DEFINE_M68K_CPU_TYPE_M68K(m68020),
DEFINE_M68K_CPU_TYPE_M68K(m68030),
DEFINE_M68K_CPU_TYPE_M68K(m68040),
DEFINE_M68K_CPU_TYPE_M68K(m68060),
DEFINE_M68K_CPU_TYPE_CF(m5206),
DEFINE_M68K_CPU_TYPE_CF(m5208),
DEFINE_M68K_CPU_TYPE_CF(cfv4e),
DEFINE_M68K_CPU_TYPE_CF(any),
};
DEFINE_TYPES(m68k_cpus_type_infos)
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