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     m68k_set_feature(env, M68K_FEATURE_RTD);
 134 }
 135 #define m68030_cpu_initfn m68020_cpu_initfn
 136 #define m68040_cpu_initfn m68020_cpu_initfn
 137
 138 static void m68060_cpu_initfn(Object *obj)
 139 {
 140     M68kCPU *cpu = M68K_CPU(obj);
 141     CPUM68KState *env = &cpu->env;
 142
 143     m68k_set_feature(env, M68K_FEATURE_M68000);
 144     m68k_set_feature(env, M68K_FEATURE_USP);
 145     m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 146     m68k_set_feature(env, M68K_FEATURE_BRAL);
 147     m68k_set_feature(env, M68K_FEATURE_BCCL);
 148     m68k_set_feature(env, M68K_FEATURE_BITFIELD);
 149     m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
 150     m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
 151     m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
 152     m68k_set_feature(env, M68K_FEATURE_FPU);
 153     m68k_set_feature(env, M68K_FEATURE_CAS);
 154     m68k_set_feature(env, M68K_FEATURE_BKPT);
 155     m68k_set_feature(env, M68K_FEATURE_RTD);
 156 }
 157
 158 static void m5208_cpu_initfn(Object *obj)
 159 {
 160     M68kCPU *cpu = M68K_CPU(obj);
 161     CPUM68KState *env = &cpu->env;
 162
 163     m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 164     m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
 165     m68k_set_feature(env, M68K_FEATURE_BRAL);
 166     m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
 167     m68k_set_feature(env, M68K_FEATURE_USP);
 168 }
 169
 170 static void cfv4e_cpu_initfn(Object *obj)
 171 {
 172     M68kCPU *cpu = M68K_CPU(obj);
 173     CPUM68KState *env = &cpu->env;
 174
 175     m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 176     m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
 177     m68k_set_feature(env, M68K_FEATURE_BRAL);
 178     m68k_set_feature(env, M68K_FEATURE_CF_FPU);
 179     m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
 180     m68k_set_feature(env, M68K_FEATURE_USP);
 181 }
 182
 183 static void any_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_CF_ISA_APLUSC);
 191     m68k_set_feature(env, M68K_FEATURE_BRAL);
 192     m68k_set_feature(env, M68K_FEATURE_CF_FPU);
 193     /* MAC and EMAC are mututally exclusive, so pick EMAC.
 194        It's mostly backwards compatible.  */
 195     m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
 196     m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B);
 197     m68k_set_feature(env, M68K_FEATURE_USP);
 198     m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
 199     m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 200 }
 201
 202 typedef struct M68kCPUInfo {
 203     const char *name;
 204     void (*instance_init)(Object *obj);
 205 } M68kCPUInfo;
 206
 207 static const M68kCPUInfo m68k_cpus[] = {
 208     { .name = "m68000", .instance_init = m68000_cpu_initfn },
 209     { .name = "m68020", .instance_init = m68020_cpu_initfn },
 210     { .name = "m68030", .instance_init = m68030_cpu_initfn },
 211     { .name = "m68040", .instance_init = m68040_cpu_initfn },
 212     { .name = "m68060", .instance_init = m68060_cpu_initfn },
 213     { .name = "m5206", .instance_init = m5206_cpu_initfn },
 214     { .name = "m5208", .instance_init = m5208_cpu_initfn },
 215     { .name = "cfv4e", .instance_init = cfv4e_cpu_initfn },
 216     { .name = "any",   .instance_init = any_cpu_initfn },
 217 };
 218
 219 static void m68k_cpu_realizefn(DeviceState *dev, Error **errp)
 220 {
 221     CPUState *cs = CPU(dev);
 222     M68kCPU *cpu = M68K_CPU(dev);
 223     M68kCPUClass *mcc = M68K_CPU_GET_CLASS(dev);
 224     Error *local_err = NULL;
 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
 240 static void m68k_cpu_initfn(Object *obj)
 241 {
 242     CPUState *cs = CPU(obj);
 243     M68kCPU *cpu = M68K_CPU(obj);
 244     CPUM68KState *env = &cpu->env;
 245     static bool inited;
 246
 247     cs->env_ptr = env;
 248
 249     if (tcg_enabled() && !inited) {
 250         inited = true;
 251         m68k_tcg_init();
 252     }
 253 }
 254
 255 static const VMStateDescription vmstate_m68k_cpu = {
 256     .name = "cpu",
 257     .unmigratable = 1,
 258 };
 259
 260 static void m68k_cpu_class_init(ObjectClass *c, void *data)
 261 {
 262     M68kCPUClass *mcc = M68K_CPU_CLASS(c);
 263     CPUClass *cc = CPU_CLASS(c);
 264     DeviceClass *dc = DEVICE_CLASS(c);
 265
 266     mcc->parent_realize = dc->realize;
 267     dc->realize = m68k_cpu_realizefn;
 268
 269     mcc->parent_reset = cc->reset;
 270     cc->reset = m68k_cpu_reset;
 271
 272     cc->class_by_name = m68k_cpu_class_by_name;
 273     cc->has_work = m68k_cpu_has_work;
 274     cc->do_interrupt = m68k_cpu_do_interrupt;
 275     cc->cpu_exec_interrupt = m68k_cpu_exec_interrupt;
 276     cc->dump_state = m68k_cpu_dump_state;
 277     cc->set_pc = m68k_cpu_set_pc;
 278     cc->gdb_read_register = m68k_cpu_gdb_read_register;
 279     cc->gdb_write_register = m68k_cpu_gdb_write_register;
 280 #ifdef CONFIG_USER_ONLY
 281     cc->handle_mmu_fault = m68k_cpu_handle_mmu_fault;
 282 #else
 283     cc->get_phys_page_debug = m68k_cpu_get_phys_page_debug;
 284 #endif
 285     cc->disas_set_info = m68k_cpu_disas_set_info;
 286
 287     cc->gdb_num_core_regs = 18;
 288     cc->gdb_core_xml_file = "cf-core.xml";
 289
 290     dc->vmsd = &vmstate_m68k_cpu;
 291 }
 292
 293 static void register_cpu_type(const M68kCPUInfo *info)
 294 {
 295     TypeInfo type_info = {
 296         .parent = TYPE_M68K_CPU,
 297         .instance_init = info->instance_init,
 298     };
 299
 300     type_info.name = g_strdup_printf("%s-" TYPE_M68K_CPU, info->name);
 301     type_register(&type_info);
 302     g_free((void *)type_info.name);
 303 }
 304
 305 static const TypeInfo m68k_cpu_type_info = {
 306     .name = TYPE_M68K_CPU,
 307     .parent = TYPE_CPU,
 308     .instance_size = sizeof(M68kCPU),
 309     .instance_init = m68k_cpu_initfn,
 310     .abstract = true,
 311     .class_size = sizeof(M68kCPUClass),
 312     .class_init = m68k_cpu_class_init,
 313 };
 314
 315 static void m68k_cpu_register_types(void)
 316 {
 317     int i;
 318
 319     type_register_static(&m68k_cpu_type_info);
 320     for (i = 0; i < ARRAY_SIZE(m68k_cpus); i++) {
 321         register_cpu_type(&m68k_cpus[i]);
 322     }
 323 }
 324
 325 type_init(m68k_cpu_register_types)