qemu/target/m68k/cpu.c
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   1/*
   2 * QEMU Motorola 68k CPU
   3 *
   4 * Copyright (c) 2012 SUSE LINUX Products GmbH
   5 *
   6 * This library is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU Lesser General Public
   8 * License as published by the Free Software Foundation; either
   9 * version 2.1 of the License, or (at your option) any later version.
  10 *
  11 * This library is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 * Lesser General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU Lesser General Public
  17 * License along with this library; if not, see
  18 * <http://www.gnu.org/licenses/lgpl-2.1.html>
  19 */
  20
  21#include "qemu/osdep.h"
  22#include "qapi/error.h"
  23#include "cpu.h"
  24#include "qemu-common.h"
  25#include "migration/vmstate.h"
  26#include "exec/exec-all.h"
  27#include "fpu/softfloat.h"
  28
  29static void m68k_cpu_set_pc(CPUState *cs, vaddr value)
  30{
  31    M68kCPU *cpu = M68K_CPU(cs);
  32
  33    cpu->env.pc = value;
  34}
  35
  36static bool m68k_cpu_has_work(CPUState *cs)
  37{
  38    return cs->interrupt_request & CPU_INTERRUPT_HARD;
  39}
  40
  41static void m68k_set_feature(CPUM68KState *env, int feature)
  42{
  43    env->features |= (1u << feature);
  44}
  45
  46/* CPUClass::reset() */
  47static void m68k_cpu_reset(CPUState *s)
  48{
  49    M68kCPU *cpu = M68K_CPU(s);
  50    M68kCPUClass *mcc = M68K_CPU_GET_CLASS(cpu);
  51    CPUM68KState *env = &cpu->env;
  52    floatx80 nan = floatx80_default_nan(NULL);
  53    int i;
  54
  55    mcc->parent_reset(s);
  56
  57    memset(env, 0, offsetof(CPUM68KState, end_reset_fields));
  58#ifdef CONFIG_SOFTMMU
  59    cpu_m68k_set_sr(env, SR_S | SR_I);
  60#else
  61    cpu_m68k_set_sr(env, 0);
  62#endif
  63    for (i = 0; i < 8; i++) {
  64        env->fregs[i].d = nan;
  65    }
  66    cpu_m68k_set_fpcr(env, 0);
  67    env->fpsr = 0;
  68
  69    /* TODO: We should set PC from the interrupt vector.  */
  70    env->pc = 0;
  71}
  72
  73static void m68k_cpu_disas_set_info(CPUState *s, disassemble_info *info)
  74{
  75    M68kCPU *cpu = M68K_CPU(s);
  76    CPUM68KState *env = &cpu->env;
  77    info->print_insn = print_insn_m68k;
  78    if (m68k_feature(env, M68K_FEATURE_M68000)) {
  79        info->mach = bfd_mach_m68040;
  80    }
  81}
  82
  83/* CPU models */
  84
  85static ObjectClass *m68k_cpu_class_by_name(const char *cpu_model)
  86{
  87    ObjectClass *oc;
  88    char *typename;
  89
  90    typename = g_strdup_printf(M68K_CPU_TYPE_NAME("%s"), cpu_model);
  91    oc = object_class_by_name(typename);
  92    g_free(typename);
  93    if (oc != NULL && (object_class_dynamic_cast(oc, TYPE_M68K_CPU) == NULL ||
  94                       object_class_is_abstract(oc))) {
  95        return NULL;
  96    }
  97    return oc;
  98}
  99
 100static void m5206_cpu_initfn(Object *obj)
 101{
 102    M68kCPU *cpu = M68K_CPU(obj);
 103    CPUM68KState *env = &cpu->env;
 104
 105    m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 106}
 107
 108static void m68000_cpu_initfn(Object *obj)
 109{
 110    M68kCPU *cpu = M68K_CPU(obj);
 111    CPUM68KState *env = &cpu->env;
 112
 113    m68k_set_feature(env, M68K_FEATURE_M68000);
 114    m68k_set_feature(env, M68K_FEATURE_USP);
 115    m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 116    m68k_set_feature(env, M68K_FEATURE_MOVEP);
 117}
 118
 119static void m68020_cpu_initfn(Object *obj)
 120{
 121    M68kCPU *cpu = M68K_CPU(obj);
 122    CPUM68KState *env = &cpu->env;
 123
 124    m68k_set_feature(env, M68K_FEATURE_M68000);
 125    m68k_set_feature(env, M68K_FEATURE_USP);
 126    m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 127    m68k_set_feature(env, M68K_FEATURE_QUAD_MULDIV);
 128    m68k_set_feature(env, M68K_FEATURE_BRAL);
 129    m68k_set_feature(env, M68K_FEATURE_BCCL);
 130    m68k_set_feature(env, M68K_FEATURE_BITFIELD);
 131    m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
 132    m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
 133    m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
 134    m68k_set_feature(env, M68K_FEATURE_FPU);
 135    m68k_set_feature(env, M68K_FEATURE_CAS);
 136    m68k_set_feature(env, M68K_FEATURE_BKPT);
 137    m68k_set_feature(env, M68K_FEATURE_RTD);
 138    m68k_set_feature(env, M68K_FEATURE_CHK2);
 139    m68k_set_feature(env, M68K_FEATURE_MOVEP);
 140}
 141#define m68030_cpu_initfn m68020_cpu_initfn
 142
 143static void m68040_cpu_initfn(Object *obj)
 144{
 145    M68kCPU *cpu = M68K_CPU(obj);
 146    CPUM68KState *env = &cpu->env;
 147
 148    m68020_cpu_initfn(obj);
 149    m68k_set_feature(env, M68K_FEATURE_M68040);
 150}
 151
 152static void m68060_cpu_initfn(Object *obj)
 153{
 154    M68kCPU *cpu = M68K_CPU(obj);
 155    CPUM68KState *env = &cpu->env;
 156
 157    m68k_set_feature(env, M68K_FEATURE_M68000);
 158    m68k_set_feature(env, M68K_FEATURE_USP);
 159    m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 160    m68k_set_feature(env, M68K_FEATURE_BRAL);
 161    m68k_set_feature(env, M68K_FEATURE_BCCL);
 162    m68k_set_feature(env, M68K_FEATURE_BITFIELD);
 163    m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
 164    m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
 165    m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
 166    m68k_set_feature(env, M68K_FEATURE_FPU);
 167    m68k_set_feature(env, M68K_FEATURE_CAS);
 168    m68k_set_feature(env, M68K_FEATURE_BKPT);
 169    m68k_set_feature(env, M68K_FEATURE_RTD);
 170    m68k_set_feature(env, M68K_FEATURE_CHK2);
 171}
 172
 173static void m5208_cpu_initfn(Object *obj)
 174{
 175    M68kCPU *cpu = M68K_CPU(obj);
 176    CPUM68KState *env = &cpu->env;
 177
 178    m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 179    m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
 180    m68k_set_feature(env, M68K_FEATURE_BRAL);
 181    m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
 182    m68k_set_feature(env, M68K_FEATURE_USP);
 183}
 184
 185static void cfv4e_cpu_initfn(Object *obj)
 186{
 187    M68kCPU *cpu = M68K_CPU(obj);
 188    CPUM68KState *env = &cpu->env;
 189
 190    m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 191    m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
 192    m68k_set_feature(env, M68K_FEATURE_BRAL);
 193    m68k_set_feature(env, M68K_FEATURE_CF_FPU);
 194    m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
 195    m68k_set_feature(env, M68K_FEATURE_USP);
 196}
 197
 198static void any_cpu_initfn(Object *obj)
 199{
 200    M68kCPU *cpu = M68K_CPU(obj);
 201    CPUM68KState *env = &cpu->env;
 202
 203    m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 204    m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
 205    m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
 206    m68k_set_feature(env, M68K_FEATURE_BRAL);
 207    m68k_set_feature(env, M68K_FEATURE_CF_FPU);
 208    /* MAC and EMAC are mututally exclusive, so pick EMAC.
 209       It's mostly backwards compatible.  */
 210    m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
 211    m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B);
 212    m68k_set_feature(env, M68K_FEATURE_USP);
 213    m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
 214    m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 215}
 216
 217static void m68k_cpu_realizefn(DeviceState *dev, Error **errp)
 218{
 219    CPUState *cs = CPU(dev);
 220    M68kCPU *cpu = M68K_CPU(dev);
 221    M68kCPUClass *mcc = M68K_CPU_GET_CLASS(dev);
 222    Error *local_err = NULL;
 223
 224    register_m68k_insns(&cpu->env);
 225
 226    cpu_exec_realizefn(cs, &local_err);
 227    if (local_err != NULL) {
 228        error_propagate(errp, local_err);
 229        return;
 230    }
 231
 232    m68k_cpu_init_gdb(cpu);
 233
 234    cpu_reset(cs);
 235    qemu_init_vcpu(cs);
 236
 237    mcc->parent_realize(dev, errp);
 238}
 239
 240static void m68k_cpu_initfn(Object *obj)
 241{
 242    CPUState *cs = CPU(obj);
 243    M68kCPU *cpu = M68K_CPU(obj);
 244    CPUM68KState *env = &cpu->env;
 245
 246    cs->env_ptr = env;
 247}
 248
 249static const VMStateDescription vmstate_m68k_cpu = {
 250    .name = "cpu",
 251    .unmigratable = 1,
 252};
 253
 254static void m68k_cpu_class_init(ObjectClass *c, void *data)
 255{
 256    M68kCPUClass *mcc = M68K_CPU_CLASS(c);
 257    CPUClass *cc = CPU_CLASS(c);
 258    DeviceClass *dc = DEVICE_CLASS(c);
 259
 260    device_class_set_parent_realize(dc, m68k_cpu_realizefn,
 261                                    &mcc->parent_realize);
 262    mcc->parent_reset = cc->reset;
 263    cc->reset = m68k_cpu_reset;
 264
 265    cc->class_by_name = m68k_cpu_class_by_name;
 266    cc->has_work = m68k_cpu_has_work;
 267    cc->do_interrupt = m68k_cpu_do_interrupt;
 268    cc->cpu_exec_interrupt = m68k_cpu_exec_interrupt;
 269    cc->dump_state = m68k_cpu_dump_state;
 270    cc->set_pc = m68k_cpu_set_pc;
 271    cc->gdb_read_register = m68k_cpu_gdb_read_register;
 272    cc->gdb_write_register = m68k_cpu_gdb_write_register;
 273    cc->handle_mmu_fault = m68k_cpu_handle_mmu_fault;
 274#if defined(CONFIG_SOFTMMU)
 275    cc->do_unassigned_access = m68k_cpu_unassigned_access;
 276    cc->get_phys_page_debug = m68k_cpu_get_phys_page_debug;
 277#endif
 278    cc->disas_set_info = m68k_cpu_disas_set_info;
 279    cc->tcg_initialize = m68k_tcg_init;
 280
 281    cc->gdb_num_core_regs = 18;
 282    cc->gdb_core_xml_file = "cf-core.xml";
 283
 284    dc->vmsd = &vmstate_m68k_cpu;
 285}
 286
 287#define DEFINE_M68K_CPU_TYPE(cpu_model, initfn) \
 288    {                                           \
 289        .name = M68K_CPU_TYPE_NAME(cpu_model),  \
 290        .instance_init = initfn,                \
 291        .parent = TYPE_M68K_CPU,                \
 292    }
 293
 294static const TypeInfo m68k_cpus_type_infos[] = {
 295    { /* base class should be registered first */
 296        .name = TYPE_M68K_CPU,
 297        .parent = TYPE_CPU,
 298        .instance_size = sizeof(M68kCPU),
 299        .instance_init = m68k_cpu_initfn,
 300        .abstract = true,
 301        .class_size = sizeof(M68kCPUClass),
 302        .class_init = m68k_cpu_class_init,
 303    },
 304    DEFINE_M68K_CPU_TYPE("m68000", m68000_cpu_initfn),
 305    DEFINE_M68K_CPU_TYPE("m68020", m68020_cpu_initfn),
 306    DEFINE_M68K_CPU_TYPE("m68030", m68030_cpu_initfn),
 307    DEFINE_M68K_CPU_TYPE("m68040", m68040_cpu_initfn),
 308    DEFINE_M68K_CPU_TYPE("m68060", m68060_cpu_initfn),
 309    DEFINE_M68K_CPU_TYPE("m5206", m5206_cpu_initfn),
 310    DEFINE_M68K_CPU_TYPE("m5208", m5208_cpu_initfn),
 311    DEFINE_M68K_CPU_TYPE("cfv4e", cfv4e_cpu_initfn),
 312    DEFINE_M68K_CPU_TYPE("any", any_cpu_initfn),
 313};
 314
 315DEFINE_TYPES(m68k_cpus_type_infos)
 316
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