qemu/target/m68k/cpu.c
<<
>>
Prefs 
   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 "migration/vmstate.h"
  25#include "fpu/softfloat.h"
  26
  27static void m68k_cpu_set_pc(CPUState *cs, vaddr value)
  28{
  29    M68kCPU *cpu = M68K_CPU(cs);
  30
  31    cpu->env.pc = value;
  32}
  33
  34static bool m68k_cpu_has_work(CPUState *cs)
  35{
  36    return cs->interrupt_request & CPU_INTERRUPT_HARD;
  37}
  38
  39static void m68k_set_feature(CPUM68KState *env, int feature)
  40{
  41    env->features |= (1u << feature);
  42}
  43
  44/* CPUClass::reset() */
  45static void m68k_cpu_reset(CPUState *s)
  46{
  47    M68kCPU *cpu = M68K_CPU(s);
  48    M68kCPUClass *mcc = M68K_CPU_GET_CLASS(cpu);
  49    CPUM68KState *env = &cpu->env;
  50    floatx80 nan = floatx80_default_nan(NULL);
  51    int i;
  52
  53    mcc->parent_reset(s);
  54
  55    memset(env, 0, offsetof(CPUM68KState, end_reset_fields));
  56#ifdef CONFIG_SOFTMMU
  57    cpu_m68k_set_sr(env, SR_S | SR_I);
  58#else
  59    cpu_m68k_set_sr(env, 0);
  60#endif
  61    for (i = 0; i < 8; i++) {
  62        env->fregs[i].d = nan;
  63    }
  64    cpu_m68k_set_fpcr(env, 0);
  65    env->fpsr = 0;
  66
  67    /* TODO: We should set PC from the interrupt vector.  */
  68    env->pc = 0;
  69}
  70
  71static void m68k_cpu_disas_set_info(CPUState *s, disassemble_info *info)
  72{
  73    M68kCPU *cpu = M68K_CPU(s);
  74    CPUM68KState *env = &cpu->env;
  75    info->print_insn = print_insn_m68k;
  76    if (m68k_feature(env, M68K_FEATURE_M68000)) {
  77        info->mach = bfd_mach_m68040;
  78    }
  79}
  80
  81/* CPU models */
  82
  83static ObjectClass *m68k_cpu_class_by_name(const char *cpu_model)
  84{
  85    ObjectClass *oc;
  86    char *typename;
  87
  88    typename = g_strdup_printf(M68K_CPU_TYPE_NAME("%s"), cpu_model);
  89    oc = object_class_by_name(typename);
  90    g_free(typename);
  91    if (oc != NULL && (object_class_dynamic_cast(oc, TYPE_M68K_CPU) == NULL ||
  92                       object_class_is_abstract(oc))) {
  93        return NULL;
  94    }
  95    return oc;
  96}
  97
  98static void m5206_cpu_initfn(Object *obj)
  99{
 100    M68kCPU *cpu = M68K_CPU(obj);
 101    CPUM68KState *env = &cpu->env;
 102
 103    m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 104}
 105
 106static void m68000_cpu_initfn(Object *obj)
 107{
 108    M68kCPU *cpu = M68K_CPU(obj);
 109    CPUM68KState *env = &cpu->env;
 110
 111    m68k_set_feature(env, M68K_FEATURE_M68000);
 112    m68k_set_feature(env, M68K_FEATURE_USP);
 113    m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 114    m68k_set_feature(env, M68K_FEATURE_MOVEP);
 115}
 116
 117static void m68020_cpu_initfn(Object *obj)
 118{
 119    M68kCPU *cpu = M68K_CPU(obj);
 120    CPUM68KState *env = &cpu->env;
 121
 122    m68k_set_feature(env, M68K_FEATURE_M68000);
 123    m68k_set_feature(env, M68K_FEATURE_USP);
 124    m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 125    m68k_set_feature(env, M68K_FEATURE_QUAD_MULDIV);
 126    m68k_set_feature(env, M68K_FEATURE_BRAL);
 127    m68k_set_feature(env, M68K_FEATURE_BCCL);
 128    m68k_set_feature(env, M68K_FEATURE_BITFIELD);
 129    m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
 130    m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
 131    m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
 132    m68k_set_feature(env, M68K_FEATURE_FPU);
 133    m68k_set_feature(env, M68K_FEATURE_CAS);
 134    m68k_set_feature(env, M68K_FEATURE_BKPT);
 135    m68k_set_feature(env, M68K_FEATURE_RTD);
 136    m68k_set_feature(env, M68K_FEATURE_CHK2);
 137    m68k_set_feature(env, M68K_FEATURE_MOVEP);
 138}
 139#define m68030_cpu_initfn m68020_cpu_initfn
 140
 141static void m68040_cpu_initfn(Object *obj)
 142{
 143    M68kCPU *cpu = M68K_CPU(obj);
 144    CPUM68KState *env = &cpu->env;
 145
 146    m68020_cpu_initfn(obj);
 147    m68k_set_feature(env, M68K_FEATURE_M68040);
 148}
 149
 150static void m68060_cpu_initfn(Object *obj)
 151{
 152    M68kCPU *cpu = M68K_CPU(obj);
 153    CPUM68KState *env = &cpu->env;
 154
 155    m68k_set_feature(env, M68K_FEATURE_M68000);
 156    m68k_set_feature(env, M68K_FEATURE_USP);
 157    m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 158    m68k_set_feature(env, M68K_FEATURE_BRAL);
 159    m68k_set_feature(env, M68K_FEATURE_BCCL);
 160    m68k_set_feature(env, M68K_FEATURE_BITFIELD);
 161    m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
 162    m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
 163    m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
 164    m68k_set_feature(env, M68K_FEATURE_FPU);
 165    m68k_set_feature(env, M68K_FEATURE_CAS);
 166    m68k_set_feature(env, M68K_FEATURE_BKPT);
 167    m68k_set_feature(env, M68K_FEATURE_RTD);
 168    m68k_set_feature(env, M68K_FEATURE_CHK2);
 169}
 170
 171static void m5208_cpu_initfn(Object *obj)
 172{
 173    M68kCPU *cpu = M68K_CPU(obj);
 174    CPUM68KState *env = &cpu->env;
 175
 176    m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 177    m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
 178    m68k_set_feature(env, M68K_FEATURE_BRAL);
 179    m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
 180    m68k_set_feature(env, M68K_FEATURE_USP);
 181}
 182
 183static void cfv4e_cpu_initfn(Object *obj)
 184{
 185    M68kCPU *cpu = M68K_CPU(obj);
 186    CPUM68KState *env = &cpu->env;
 187
 188    m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 189    m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
 190    m68k_set_feature(env, M68K_FEATURE_BRAL);
 191    m68k_set_feature(env, M68K_FEATURE_CF_FPU);
 192    m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
 193    m68k_set_feature(env, M68K_FEATURE_USP);
 194}
 195
 196static void any_cpu_initfn(Object *obj)
 197{
 198    M68kCPU *cpu = M68K_CPU(obj);
 199    CPUM68KState *env = &cpu->env;
 200
 201    m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 202    m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
 203    m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
 204    m68k_set_feature(env, M68K_FEATURE_BRAL);
 205    m68k_set_feature(env, M68K_FEATURE_CF_FPU);
 206    /*
 207     * MAC and EMAC are mututally exclusive, so pick EMAC.
 208     * It's mostly backwards compatible.
 209     */
 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    M68kCPU *cpu = M68K_CPU(obj);
 243
 244    cpu_set_cpustate_pointers(cpu);
 245}
 246
 247static const VMStateDescription vmstate_m68k_cpu = {
 248    .name = "cpu",
 249    .unmigratable = 1,
 250};
 251
 252static void m68k_cpu_class_init(ObjectClass *c, void *data)
 253{
 254    M68kCPUClass *mcc = M68K_CPU_CLASS(c);
 255    CPUClass *cc = CPU_CLASS(c);
 256    DeviceClass *dc = DEVICE_CLASS(c);
 257
 258    device_class_set_parent_realize(dc, m68k_cpu_realizefn,
 259                                    &mcc->parent_realize);
 260    mcc->parent_reset = cc->reset;
 261    cc->reset = m68k_cpu_reset;
 262
 263    cc->class_by_name = m68k_cpu_class_by_name;
 264    cc->has_work = m68k_cpu_has_work;
 265    cc->do_interrupt = m68k_cpu_do_interrupt;
 266    cc->cpu_exec_interrupt = m68k_cpu_exec_interrupt;
 267    cc->dump_state = m68k_cpu_dump_state;
 268    cc->set_pc = m68k_cpu_set_pc;
 269    cc->gdb_read_register = m68k_cpu_gdb_read_register;
 270    cc->gdb_write_register = m68k_cpu_gdb_write_register;
 271    cc->tlb_fill = m68k_cpu_tlb_fill;
 272#if defined(CONFIG_SOFTMMU)
 273    cc->do_transaction_failed = m68k_cpu_transaction_failed;
 274    cc->get_phys_page_debug = m68k_cpu_get_phys_page_debug;
 275#endif
 276    cc->disas_set_info = m68k_cpu_disas_set_info;
 277    cc->tcg_initialize = m68k_tcg_init;
 278
 279    cc->gdb_num_core_regs = 18;
 280    cc->gdb_core_xml_file = "cf-core.xml";
 281
 282    dc->vmsd = &vmstate_m68k_cpu;
 283}
 284
 285#define DEFINE_M68K_CPU_TYPE(cpu_model, initfn) \
 286    {                                           \
 287        .name = M68K_CPU_TYPE_NAME(cpu_model),  \
 288        .instance_init = initfn,                \
 289        .parent = TYPE_M68K_CPU,                \
 290    }
 291
 292static const TypeInfo m68k_cpus_type_infos[] = {
 293    { /* base class should be registered first */
 294        .name = TYPE_M68K_CPU,
 295        .parent = TYPE_CPU,
 296        .instance_size = sizeof(M68kCPU),
 297        .instance_init = m68k_cpu_initfn,
 298        .abstract = true,
 299        .class_size = sizeof(M68kCPUClass),
 300        .class_init = m68k_cpu_class_init,
 301    },
 302    DEFINE_M68K_CPU_TYPE("m68000", m68000_cpu_initfn),
 303    DEFINE_M68K_CPU_TYPE("m68020", m68020_cpu_initfn),
 304    DEFINE_M68K_CPU_TYPE("m68030", m68030_cpu_initfn),
 305    DEFINE_M68K_CPU_TYPE("m68040", m68040_cpu_initfn),
 306    DEFINE_M68K_CPU_TYPE("m68060", m68060_cpu_initfn),
 307    DEFINE_M68K_CPU_TYPE("m5206", m5206_cpu_initfn),
 308    DEFINE_M68K_CPU_TYPE("m5208", m5208_cpu_initfn),
 309    DEFINE_M68K_CPU_TYPE("cfv4e", cfv4e_cpu_initfn),
 310    DEFINE_M68K_CPU_TYPE("any", any_cpu_initfn),
 311};
 312
 313DEFINE_TYPES(m68k_cpus_type_infos)
 314
Hosted by Missing Link Electronics. The original LXR software by the LXR community, this experimental version by lxr@linux.no.