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 "fpu/softfloat.h"
  27
  28static void m68k_cpu_set_pc(CPUState *cs, vaddr value)
  29{
  30    M68kCPU *cpu = M68K_CPU(cs);
  31
  32    cpu->env.pc = value;
  33}
  34
  35static bool m68k_cpu_has_work(CPUState *cs)
  36{
  37    return cs->interrupt_request & CPU_INTERRUPT_HARD;
  38}
  39
  40static void m68k_set_feature(CPUM68KState *env, int feature)
  41{
  42    env->features |= (1u << feature);
  43}
  44
  45/* CPUClass::reset() */
  46static void m68k_cpu_reset(CPUState *s)
  47{
  48    M68kCPU *cpu = M68K_CPU(s);
  49    M68kCPUClass *mcc = M68K_CPU_GET_CLASS(cpu);
  50    CPUM68KState *env = &cpu->env;
  51    floatx80 nan = floatx80_default_nan(NULL);
  52    int i;
  53
  54    mcc->parent_reset(s);
  55
  56    memset(env, 0, offsetof(CPUM68KState, end_reset_fields));
  57#ifdef CONFIG_SOFTMMU
  58    cpu_m68k_set_sr(env, SR_S | SR_I);
  59#else
  60    cpu_m68k_set_sr(env, 0);
  61#endif
  62    for (i = 0; i < 8; i++) {
  63        env->fregs[i].d = nan;
  64    }
  65    cpu_m68k_set_fpcr(env, 0);
  66    env->fpsr = 0;
  67
  68    /* TODO: We should set PC from the interrupt vector.  */
  69    env->pc = 0;
  70}
  71
  72static void m68k_cpu_disas_set_info(CPUState *s, disassemble_info *info)
  73{
  74    M68kCPU *cpu = M68K_CPU(s);
  75    CPUM68KState *env = &cpu->env;
  76    info->print_insn = print_insn_m68k;
  77    if (m68k_feature(env, M68K_FEATURE_M68000)) {
  78        info->mach = bfd_mach_m68040;
  79    }
  80}
  81
  82/* CPU models */
  83
  84static ObjectClass *m68k_cpu_class_by_name(const char *cpu_model)
  85{
  86    ObjectClass *oc;
  87    char *typename;
  88
  89    typename = g_strdup_printf(M68K_CPU_TYPE_NAME("%s"), cpu_model);
  90    oc = object_class_by_name(typename);
  91    g_free(typename);
  92    if (oc != NULL && (object_class_dynamic_cast(oc, TYPE_M68K_CPU) == NULL ||
  93                       object_class_is_abstract(oc))) {
  94        return NULL;
  95    }
  96    return oc;
  97}
  98
  99static void m5206_cpu_initfn(Object *obj)
 100{
 101    M68kCPU *cpu = M68K_CPU(obj);
 102    CPUM68KState *env = &cpu->env;
 103
 104    m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 105}
 106
 107static void m68000_cpu_initfn(Object *obj)
 108{
 109    M68kCPU *cpu = M68K_CPU(obj);
 110    CPUM68KState *env = &cpu->env;
 111
 112    m68k_set_feature(env, M68K_FEATURE_M68000);
 113    m68k_set_feature(env, M68K_FEATURE_USP);
 114    m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 115    m68k_set_feature(env, M68K_FEATURE_MOVEP);
 116}
 117
 118static void m68020_cpu_initfn(Object *obj)
 119{
 120    M68kCPU *cpu = M68K_CPU(obj);
 121    CPUM68KState *env = &cpu->env;
 122
 123    m68k_set_feature(env, M68K_FEATURE_M68000);
 124    m68k_set_feature(env, M68K_FEATURE_USP);
 125    m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 126    m68k_set_feature(env, M68K_FEATURE_QUAD_MULDIV);
 127    m68k_set_feature(env, M68K_FEATURE_BRAL);
 128    m68k_set_feature(env, M68K_FEATURE_BCCL);
 129    m68k_set_feature(env, M68K_FEATURE_BITFIELD);
 130    m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
 131    m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
 132    m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
 133    m68k_set_feature(env, M68K_FEATURE_FPU);
 134    m68k_set_feature(env, M68K_FEATURE_CAS);
 135    m68k_set_feature(env, M68K_FEATURE_BKPT);
 136    m68k_set_feature(env, M68K_FEATURE_RTD);
 137    m68k_set_feature(env, M68K_FEATURE_CHK2);
 138    m68k_set_feature(env, M68K_FEATURE_MOVEP);
 139}
 140#define m68030_cpu_initfn m68020_cpu_initfn
 141
 142static void m68040_cpu_initfn(Object *obj)
 143{
 144    M68kCPU *cpu = M68K_CPU(obj);
 145    CPUM68KState *env = &cpu->env;
 146
 147    m68020_cpu_initfn(obj);
 148    m68k_set_feature(env, M68K_FEATURE_M68040);
 149}
 150
 151static void m68060_cpu_initfn(Object *obj)
 152{
 153    M68kCPU *cpu = M68K_CPU(obj);
 154    CPUM68KState *env = &cpu->env;
 155
 156    m68k_set_feature(env, M68K_FEATURE_M68000);
 157    m68k_set_feature(env, M68K_FEATURE_USP);
 158    m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 159    m68k_set_feature(env, M68K_FEATURE_BRAL);
 160    m68k_set_feature(env, M68K_FEATURE_BCCL);
 161    m68k_set_feature(env, M68K_FEATURE_BITFIELD);
 162    m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
 163    m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
 164    m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
 165    m68k_set_feature(env, M68K_FEATURE_FPU);
 166    m68k_set_feature(env, M68K_FEATURE_CAS);
 167    m68k_set_feature(env, M68K_FEATURE_BKPT);
 168    m68k_set_feature(env, M68K_FEATURE_RTD);
 169    m68k_set_feature(env, M68K_FEATURE_CHK2);
 170}
 171
 172static void m5208_cpu_initfn(Object *obj)
 173{
 174    M68kCPU *cpu = M68K_CPU(obj);
 175    CPUM68KState *env = &cpu->env;
 176
 177    m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 178    m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
 179    m68k_set_feature(env, M68K_FEATURE_BRAL);
 180    m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
 181    m68k_set_feature(env, M68K_FEATURE_USP);
 182}
 183
 184static void cfv4e_cpu_initfn(Object *obj)
 185{
 186    M68kCPU *cpu = M68K_CPU(obj);
 187    CPUM68KState *env = &cpu->env;
 188
 189    m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 190    m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
 191    m68k_set_feature(env, M68K_FEATURE_BRAL);
 192    m68k_set_feature(env, M68K_FEATURE_CF_FPU);
 193    m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
 194    m68k_set_feature(env, M68K_FEATURE_USP);
 195}
 196
 197static void any_cpu_initfn(Object *obj)
 198{
 199    M68kCPU *cpu = M68K_CPU(obj);
 200    CPUM68KState *env = &cpu->env;
 201
 202    m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 203    m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
 204    m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
 205    m68k_set_feature(env, M68K_FEATURE_BRAL);
 206    m68k_set_feature(env, M68K_FEATURE_CF_FPU);
 207    /* MAC and EMAC are mututally exclusive, so pick EMAC.
 208       It's mostly backwards compatible.  */
 209    m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
 210    m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B);
 211    m68k_set_feature(env, M68K_FEATURE_USP);
 212    m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
 213    m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 214}
 215
 216static void m68k_cpu_realizefn(DeviceState *dev, Error **errp)
 217{
 218    CPUState *cs = CPU(dev);
 219    M68kCPU *cpu = M68K_CPU(dev);
 220    M68kCPUClass *mcc = M68K_CPU_GET_CLASS(dev);
 221    Error *local_err = NULL;
 222
 223    register_m68k_insns(&cpu->env);
 224
 225    cpu_exec_realizefn(cs, &local_err);
 226    if (local_err != NULL) {
 227        error_propagate(errp, local_err);
 228        return;
 229    }
 230
 231    m68k_cpu_init_gdb(cpu);
 232
 233    cpu_reset(cs);
 234    qemu_init_vcpu(cs);
 235
 236    mcc->parent_realize(dev, errp);
 237}
 238
 239static void m68k_cpu_initfn(Object *obj)
 240{
 241    CPUState *cs = CPU(obj);
 242    M68kCPU *cpu = M68K_CPU(obj);
 243    CPUM68KState *env = &cpu->env;
 244
 245    cs->env_ptr = env;
 246}
 247
 248static const VMStateDescription vmstate_m68k_cpu = {
 249    .name = "cpu",
 250    .unmigratable = 1,
 251};
 252
 253static void m68k_cpu_class_init(ObjectClass *c, void *data)
 254{
 255    M68kCPUClass *mcc = M68K_CPU_CLASS(c);
 256    CPUClass *cc = CPU_CLASS(c);
 257    DeviceClass *dc = DEVICE_CLASS(c);
 258
 259    device_class_set_parent_realize(dc, m68k_cpu_realizefn,
 260                                    &mcc->parent_realize);
 261    mcc->parent_reset = cc->reset;
 262    cc->reset = m68k_cpu_reset;
 263
 264    cc->class_by_name = m68k_cpu_class_by_name;
 265    cc->has_work = m68k_cpu_has_work;
 266    cc->do_interrupt = m68k_cpu_do_interrupt;
 267    cc->cpu_exec_interrupt = m68k_cpu_exec_interrupt;
 268    cc->dump_state = m68k_cpu_dump_state;
 269    cc->set_pc = m68k_cpu_set_pc;
 270    cc->gdb_read_register = m68k_cpu_gdb_read_register;
 271    cc->gdb_write_register = m68k_cpu_gdb_write_register;
 272    cc->handle_mmu_fault = m68k_cpu_handle_mmu_fault;
 273#if defined(CONFIG_SOFTMMU)
 274    cc->do_unassigned_access = m68k_cpu_unassigned_access;
 275    cc->get_phys_page_debug = m68k_cpu_get_phys_page_debug;
 276#endif
 277    cc->disas_set_info = m68k_cpu_disas_set_info;
 278    cc->tcg_initialize = m68k_tcg_init;
 279
 280    cc->gdb_num_core_regs = 18;
 281    cc->gdb_core_xml_file = "cf-core.xml";
 282
 283    dc->vmsd = &vmstate_m68k_cpu;
 284}
 285
 286#define DEFINE_M68K_CPU_TYPE(cpu_model, initfn) \
 287    {                                           \
 288        .name = M68K_CPU_TYPE_NAME(cpu_model),  \
 289        .instance_init = initfn,                \
 290        .parent = TYPE_M68K_CPU,                \
 291    }
 292
 293static const TypeInfo m68k_cpus_type_infos[] = {
 294    { /* base class should be registered first */
 295        .name = TYPE_M68K_CPU,
 296        .parent = TYPE_CPU,
 297        .instance_size = sizeof(M68kCPU),
 298        .instance_init = m68k_cpu_initfn,
 299        .abstract = true,
 300        .class_size = sizeof(M68kCPUClass),
 301        .class_init = m68k_cpu_class_init,
 302    },
 303    DEFINE_M68K_CPU_TYPE("m68000", m68000_cpu_initfn),
 304    DEFINE_M68K_CPU_TYPE("m68020", m68020_cpu_initfn),
 305    DEFINE_M68K_CPU_TYPE("m68030", m68030_cpu_initfn),
 306    DEFINE_M68K_CPU_TYPE("m68040", m68040_cpu_initfn),
 307    DEFINE_M68K_CPU_TYPE("m68060", m68060_cpu_initfn),
 308    DEFINE_M68K_CPU_TYPE("m5206", m5206_cpu_initfn),
 309    DEFINE_M68K_CPU_TYPE("m5208", m5208_cpu_initfn),
 310    DEFINE_M68K_CPU_TYPE("cfv4e", cfv4e_cpu_initfn),
 311    DEFINE_M68K_CPU_TYPE("any", any_cpu_initfn),
 312};
 313
 314DEFINE_TYPES(m68k_cpus_type_infos)
 315
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