target/m68k/cpu.c

   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
  28
  29 static void m68k_cpu_set_pc(CPUState *cs, vaddr value)
  30 {
  31     M68kCPU *cpu = M68K_CPU(cs);
  32
  33     cpu->env.pc = value;
  34 }
  35
  36 static bool m68k_cpu_has_work(CPUState *cs)
  37 {
  38     return cs->interrupt_request & CPU_INTERRUPT_HARD;
  39 }
  40
  41 static void m68k_set_feature(CPUM68KState *env, int feature)
  42 {
  43     env->features |= (1u << feature);
  44 }
  45
  46 /* CPUClass::reset() */
  47 static 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
  53     mcc->parent_reset(s);
  54
  55     memset(env, 0, offsetof(CPUM68KState, end_reset_fields));
  56 #if !defined(CONFIG_USER_ONLY)
  57     env->sr = 0x2700;
  58 #endif
  59     m68k_switch_sp(env);
  60     /* ??? FP regs should be initialized to NaN.  */
  61     cpu_m68k_set_ccr(env, 0);
  62     /* TODO: We should set PC from the interrupt vector.  */
  63     env->pc = 0;
  64 }
  65
  66 static void m68k_cpu_disas_set_info(CPUState *s, disassemble_info *info)
  67 {
  68     M68kCPU *cpu = M68K_CPU(s);
  69     CPUM68KState *env = &cpu->env;
  70     info->print_insn = print_insn_m68k;
  71     if (m68k_feature(env, M68K_FEATURE_M68000)) {
  72         info->mach = bfd_mach_m68040;
  73     }
  74 }
  75
  76 /* CPU models */
  77
  78 static ObjectClass *m68k_cpu_class_by_name(const char *cpu_model)
  79 {
  80     ObjectClass *oc;
  81     char *typename;
  82
  83     if (cpu_model == NULL) {
  84         return NULL;
  85     }
  86
  87     typename = g_strdup_printf("%s-" TYPE_M68K_CPU, cpu_model);
  88     oc = object_class_by_name(typename);
  89     g_free(typename);
  90     if (oc != NULL && (object_class_dynamic_cast(oc, TYPE_M68K_CPU) == NULL ||
  91                        object_class_is_abstract(oc))) {
  92         return NULL;
  93     }
  94     return oc;
  95 }
  96
  97 static void m5206_cpu_initfn(Object *obj)
  98 {
  99     M68kCPU *cpu = M68K_CPU(obj);
 100     CPUM68KState *env = &cpu->env;
 101
 102     m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 103 }
 104
 105 static void m68000_cpu_initfn(Object *obj)
 106 {
 107     M68kCPU *cpu = M68K_CPU(obj);
 108     CPUM68KState *env = &cpu->env;
 109
 110     m68k_set_feature(env, M68K_FEATURE_M68000);
 111     m68k_set_feature(env, M68K_FEATURE_USP);
 112     m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 113 }
 114
 115 static void m68020_cpu_initfn(Object *obj)
 116 {
 117     M68kCPU *cpu = M68K_CPU(obj);
 118     CPUM68KState *env = &cpu->env;
 119
 120     m68k_set_feature(env, M68K_FEATURE_M68000);
 121     m68k_set_feature(env, M68K_FEATURE_USP);
 122     m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 123     m68k_set_feature(env, M68K_FEATURE_QUAD_MULDIV);
 124     m68k_set_feature(env, M68K_FEATURE_BRAL);
 125     m68k_set_feature(env, M68K_FEATURE_BCCL);
 126     m68k_set_feature(env, M68K_FEATURE_BITFIELD);
 127     m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
 128     m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
 129     m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
 130     m68k_set_feature(env, M68K_FEATURE_FPU);
 131     m68k_set_feature(env, M68K_FEATURE_CAS);
 132     m68k_set_feature(env, M68K_FEATURE_BKPT);
 133 }
 134 #define m68030_cpu_initfn m68020_cpu_initfn
 135 #define m68040_cpu_initfn m68020_cpu_initfn
 136
 137 static void m68060_cpu_initfn(Object *obj)
 138 {
 139     M68kCPU *cpu = M68K_CPU(obj);
 140     CPUM68KState *env = &cpu->env;
 141
 142     m68k_set_feature(env, M68K_FEATURE_M68000);
 143     m68k_set_feature(env, M68K_FEATURE_USP);
 144     m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 145     m68k_set_feature(env, M68K_FEATURE_BRAL);
 146     m68k_set_feature(env, M68K_FEATURE_BCCL);
 147     m68k_set_feature(env, M68K_FEATURE_BITFIELD);
 148     m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
 149     m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
 150     m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
 151     m68k_set_feature(env, M68K_FEATURE_FPU);
 152     m68k_set_feature(env, M68K_FEATURE_CAS);
 153     m68k_set_feature(env, M68K_FEATURE_BKPT);
 154 }
 155
 156 static void m5208_cpu_initfn(Object *obj)
 157 {
 158     M68kCPU *cpu = M68K_CPU(obj);
 159     CPUM68KState *env = &cpu->env;
 160
 161     m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 162     m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
 163     m68k_set_feature(env, M68K_FEATURE_BRAL);
 164     m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
 165     m68k_set_feature(env, M68K_FEATURE_USP);
 166 }
 167
 168 static void cfv4e_cpu_initfn(Object *obj)
 169 {
 170     M68kCPU *cpu = M68K_CPU(obj);
 171     CPUM68KState *env = &cpu->env;
 172
 173     m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 174     m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
 175     m68k_set_feature(env, M68K_FEATURE_BRAL);
 176     m68k_set_feature(env, M68K_FEATURE_CF_FPU);
 177     m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
 178     m68k_set_feature(env, M68K_FEATURE_USP);
 179 }
 180
 181 static void any_cpu_initfn(Object *obj)
 182 {
 183     M68kCPU *cpu = M68K_CPU(obj);
 184     CPUM68KState *env = &cpu->env;
 185
 186     m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 187     m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
 188     m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
 189     m68k_set_feature(env, M68K_FEATURE_BRAL);
 190     m68k_set_feature(env, M68K_FEATURE_CF_FPU);
 191     /* MAC and EMAC are mututally exclusive, so pick EMAC.
 192        It's mostly backwards compatible.  */
 193     m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
 194     m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B);
 195     m68k_set_feature(env, M68K_FEATURE_USP);
 196     m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
 197     m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 198 }
 199
 200 typedef struct M68kCPUInfo {
 201     const char *name;
 202     void (*instance_init)(Object *obj);
 203 } M68kCPUInfo;
 204
 205 static const M68kCPUInfo m68k_cpus[] = {
 206     { .name = "m68000", .instance_init = m68000_cpu_initfn },
 207     { .name = "m68020", .instance_init = m68020_cpu_initfn },
 208     { .name = "m68030", .instance_init = m68030_cpu_initfn },
 209     { .name = "m68040", .instance_init = m68040_cpu_initfn },
 210     { .name = "m68060", .instance_init = m68060_cpu_initfn },
 211     { .name = "m5206", .instance_init = m5206_cpu_initfn },
 212     { .name = "m5208", .instance_init = m5208_cpu_initfn },
 213     { .name = "cfv4e", .instance_init = cfv4e_cpu_initfn },
 214     { .name = "any",   .instance_init = any_cpu_initfn },
 215 };
 216
 217 static 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     cpu_exec_realizefn(cs, &local_err);
 225     if (local_err != NULL) {
 226         error_propagate(errp, local_err);
 227         return;
 228     }
 229
 230     m68k_cpu_init_gdb(cpu);
 231
 232     cpu_reset(cs);
 233     qemu_init_vcpu(cs);
 234
 235     mcc->parent_realize(dev, errp);
 236 }
 237
 238 static void m68k_cpu_initfn(Object *obj)
 239 {
 240     CPUState *cs = CPU(obj);
 241     M68kCPU *cpu = M68K_CPU(obj);
 242     CPUM68KState *env = &cpu->env;
 243     static bool inited;
 244
 245     cs->env_ptr = env;
 246
 247     if (tcg_enabled() && !inited) {
 248         inited = true;
 249         m68k_tcg_init();
 250     }
 251 }
 252
 253 static const VMStateDescription vmstate_m68k_cpu = {
 254     .name = "cpu",
 255     .unmigratable = 1,
 256 };
 257
 258 static void m68k_cpu_class_init(ObjectClass *c, void *data)
 259 {
 260     M68kCPUClass *mcc = M68K_CPU_CLASS(c);
 261     CPUClass *cc = CPU_CLASS(c);
 262     DeviceClass *dc = DEVICE_CLASS(c);
 263
 264     mcc->parent_realize = dc->realize;
 265     dc->realize = m68k_cpu_realizefn;
 266
 267     mcc->parent_reset = cc->reset;
 268     cc->reset = m68k_cpu_reset;
 269
 270     cc->class_by_name = m68k_cpu_class_by_name;
 271     cc->has_work = m68k_cpu_has_work;
 272     cc->do_interrupt = m68k_cpu_do_interrupt;
 273     cc->cpu_exec_interrupt = m68k_cpu_exec_interrupt;
 274     cc->dump_state = m68k_cpu_dump_state;
 275     cc->set_pc = m68k_cpu_set_pc;
 276     cc->gdb_read_register = m68k_cpu_gdb_read_register;
 277     cc->gdb_write_register = m68k_cpu_gdb_write_register;
 278 #ifdef CONFIG_USER_ONLY
 279     cc->handle_mmu_fault = m68k_cpu_handle_mmu_fault;
 280 #else
 281     cc->get_phys_page_debug = m68k_cpu_get_phys_page_debug;
 282 #endif
 283     cc->disas_set_info = m68k_cpu_disas_set_info;
 284
 285     cc->gdb_num_core_regs = 18;
 286     cc->gdb_core_xml_file = "cf-core.xml";
 287
 288     dc->vmsd = &vmstate_m68k_cpu;
 289 }
 290
 291 static void register_cpu_type(const M68kCPUInfo *info)
 292 {
 293     TypeInfo type_info = {
 294         .parent = TYPE_M68K_CPU,
 295         .instance_init = info->instance_init,
 296     };
 297
 298     type_info.name = g_strdup_printf("%s-" TYPE_M68K_CPU, info->name);
 299     type_register(&type_info);
 300     g_free((void *)type_info.name);
 301 }
 302
 303 static const TypeInfo m68k_cpu_type_info = {
 304     .name = TYPE_M68K_CPU,
 305     .parent = TYPE_CPU,
 306     .instance_size = sizeof(M68kCPU),
 307     .instance_init = m68k_cpu_initfn,
 308     .abstract = true,
 309     .class_size = sizeof(M68kCPUClass),
 310     .class_init = m68k_cpu_class_init,
 311 };
 312
 313 static void m68k_cpu_register_types(void)
 314 {
 315     int i;
 316
 317     type_register_static(&m68k_cpu_type_info);
 318     for (i = 0; i < ARRAY_SIZE(m68k_cpus); i++) {
 319         register_cpu_type(&m68k_cpus[i]);
 320     }
 321 }
 322
 323 type_init(m68k_cpu_register_types)