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