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, features));
  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     tlb_flush(s, 1);
  65 }
  66
  67 static void m68k_cpu_disas_set_info(CPUState *s, disassemble_info *info)
  68 {
  69     M68kCPU *cpu = M68K_CPU(s);
  70     CPUM68KState *env = &cpu->env;
  71     info->print_insn = print_insn_m68k;
  72     if (m68k_feature(env, M68K_FEATURE_M68000)) {
  73         info->mach = bfd_mach_m68040;
  74     }
  75 }
  76
  77 /* CPU models */
  78
  79 static ObjectClass *m68k_cpu_class_by_name(const char *cpu_model)
  80 {
  81     ObjectClass *oc;
  82     char *typename;
  83
  84     if (cpu_model == NULL) {
  85         return NULL;
  86     }
  87
  88     typename = g_strdup_printf("%s-" TYPE_M68K_CPU, 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
  98 static 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
 106 static 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 }
 115
 116 static void m68020_cpu_initfn(Object *obj)
 117 {
 118     M68kCPU *cpu = M68K_CPU(obj);
 119     CPUM68KState *env = &cpu->env;
 120
 121     m68k_set_feature(env, M68K_FEATURE_M68000);
 122     m68k_set_feature(env, M68K_FEATURE_USP);
 123     m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 124     m68k_set_feature(env, M68K_FEATURE_QUAD_MULDIV);
 125     m68k_set_feature(env, M68K_FEATURE_BRAL);
 126     m68k_set_feature(env, M68K_FEATURE_BCCL);
 127     m68k_set_feature(env, M68K_FEATURE_BITFIELD);
 128     m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
 129     m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
 130     m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
 131     m68k_set_feature(env, M68K_FEATURE_FPU);
 132     m68k_set_feature(env, M68K_FEATURE_CAS);
 133     m68k_set_feature(env, M68K_FEATURE_BKPT);
 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 }
 156
 157 static void m5208_cpu_initfn(Object *obj)
 158 {
 159     M68kCPU *cpu = M68K_CPU(obj);
 160     CPUM68KState *env = &cpu->env;
 161
 162     m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 163     m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
 164     m68k_set_feature(env, M68K_FEATURE_BRAL);
 165     m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
 166     m68k_set_feature(env, M68K_FEATURE_USP);
 167 }
 168
 169 static void cfv4e_cpu_initfn(Object *obj)
 170 {
 171     M68kCPU *cpu = M68K_CPU(obj);
 172     CPUM68KState *env = &cpu->env;
 173
 174     m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 175     m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
 176     m68k_set_feature(env, M68K_FEATURE_BRAL);
 177     m68k_set_feature(env, M68K_FEATURE_CF_FPU);
 178     m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
 179     m68k_set_feature(env, M68K_FEATURE_USP);
 180 }
 181
 182 static void any_cpu_initfn(Object *obj)
 183 {
 184     M68kCPU *cpu = M68K_CPU(obj);
 185     CPUM68KState *env = &cpu->env;
 186
 187     m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 188     m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
 189     m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
 190     m68k_set_feature(env, M68K_FEATURE_BRAL);
 191     m68k_set_feature(env, M68K_FEATURE_CF_FPU);
 192     /* MAC and EMAC are mututally exclusive, so pick EMAC.
 193        It's mostly backwards compatible.  */
 194     m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
 195     m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B);
 196     m68k_set_feature(env, M68K_FEATURE_USP);
 197     m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
 198     m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 199 }
 200
 201 typedef struct M68kCPUInfo {
 202     const char *name;
 203     void (*instance_init)(Object *obj);
 204 } M68kCPUInfo;
 205
 206 static const M68kCPUInfo m68k_cpus[] = {
 207     { .name = "m68000", .instance_init = m68000_cpu_initfn },
 208     { .name = "m68020", .instance_init = m68020_cpu_initfn },
 209     { .name = "m68030", .instance_init = m68030_cpu_initfn },
 210     { .name = "m68040", .instance_init = m68040_cpu_initfn },
 211     { .name = "m68060", .instance_init = m68060_cpu_initfn },
 212     { .name = "m5206", .instance_init = m5206_cpu_initfn },
 213     { .name = "m5208", .instance_init = m5208_cpu_initfn },
 214     { .name = "cfv4e", .instance_init = cfv4e_cpu_initfn },
 215     { .name = "any",   .instance_init = any_cpu_initfn },
 216 };
 217
 218 static void m68k_cpu_realizefn(DeviceState *dev, Error **errp)
 219 {
 220     CPUState *cs = CPU(dev);
 221     M68kCPU *cpu = M68K_CPU(dev);
 222     M68kCPUClass *mcc = M68K_CPU_GET_CLASS(dev);
 223     Error *local_err = NULL;
 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
 239 static void m68k_cpu_initfn(Object *obj)
 240 {
 241     CPUState *cs = CPU(obj);
 242     M68kCPU *cpu = M68K_CPU(obj);
 243     CPUM68KState *env = &cpu->env;
 244     static bool inited;
 245
 246     cs->env_ptr = env;
 247
 248     if (tcg_enabled() && !inited) {
 249         inited = true;
 250         m68k_tcg_init();
 251     }
 252 }
 253
 254 static const VMStateDescription vmstate_m68k_cpu = {
 255     .name = "cpu",
 256     .unmigratable = 1,
 257 };
 258
 259 static void m68k_cpu_class_init(ObjectClass *c, void *data)
 260 {
 261     M68kCPUClass *mcc = M68K_CPU_CLASS(c);
 262     CPUClass *cc = CPU_CLASS(c);
 263     DeviceClass *dc = DEVICE_CLASS(c);
 264
 265     mcc->parent_realize = dc->realize;
 266     dc->realize = m68k_cpu_realizefn;
 267
 268     mcc->parent_reset = cc->reset;
 269     cc->reset = m68k_cpu_reset;
 270
 271     cc->class_by_name = m68k_cpu_class_by_name;
 272     cc->has_work = m68k_cpu_has_work;
 273     cc->do_interrupt = m68k_cpu_do_interrupt;
 274     cc->cpu_exec_interrupt = m68k_cpu_exec_interrupt;
 275     cc->dump_state = m68k_cpu_dump_state;
 276     cc->set_pc = m68k_cpu_set_pc;
 277     cc->gdb_read_register = m68k_cpu_gdb_read_register;
 278     cc->gdb_write_register = m68k_cpu_gdb_write_register;
 279 #ifdef CONFIG_USER_ONLY
 280     cc->handle_mmu_fault = m68k_cpu_handle_mmu_fault;
 281 #else
 282     cc->get_phys_page_debug = m68k_cpu_get_phys_page_debug;
 283 #endif
 284     cc->disas_set_info = m68k_cpu_disas_set_info;
 285
 286     cc->gdb_num_core_regs = 18;
 287     cc->gdb_core_xml_file = "cf-core.xml";
 288
 289     dc->vmsd = &vmstate_m68k_cpu;
 290 }
 291
 292 static void register_cpu_type(const M68kCPUInfo *info)
 293 {
 294     TypeInfo type_info = {
 295         .parent = TYPE_M68K_CPU,
 296         .instance_init = info->instance_init,
 297     };
 298
 299     type_info.name = g_strdup_printf("%s-" TYPE_M68K_CPU, info->name);
 300     type_register(&type_info);
 301     g_free((void *)type_info.name);
 302 }
 303
 304 static const TypeInfo m68k_cpu_type_info = {
 305     .name = TYPE_M68K_CPU,
 306     .parent = TYPE_CPU,
 307     .instance_size = sizeof(M68kCPU),
 308     .instance_init = m68k_cpu_initfn,
 309     .abstract = true,
 310     .class_size = sizeof(M68kCPUClass),
 311     .class_init = m68k_cpu_class_init,
 312 };
 313
 314 static void m68k_cpu_register_types(void)
 315 {
 316     int i;
 317
 318     type_register_static(&m68k_cpu_type_info);
 319     for (i = 0; i < ARRAY_SIZE(m68k_cpus); i++) {
 320         register_cpu_type(&m68k_cpus[i]);
 321     }
 322 }
 323
 324 type_init(m68k_cpu_register_types)