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 "fpu/softfloat.h"
  27
  28 static void m68k_cpu_set_pc(CPUState *cs, vaddr value)
  29 {
  30     M68kCPU *cpu = M68K_CPU(cs);
  31
  32     cpu->env.pc = value;
  33 }
  34
  35 static bool m68k_cpu_has_work(CPUState *cs)
  36 {
  37     return cs->interrupt_request & CPU_INTERRUPT_HARD;
  38 }
  39
  40 static void m68k_set_feature(CPUM68KState *env, int feature)
  41 {
  42     env->features |= (1u << feature);
  43 }
  44
  45 /* CPUClass::reset() */
  46 static void m68k_cpu_reset(CPUState *s)
  47 {
  48     M68kCPU *cpu = M68K_CPU(s);
  49     M68kCPUClass *mcc = M68K_CPU_GET_CLASS(cpu);
  50     CPUM68KState *env = &cpu->env;
  51     floatx80 nan = floatx80_default_nan(NULL);
  52     int i;
  53
  54     mcc->parent_reset(s);
  55
  56     memset(env, 0, offsetof(CPUM68KState, end_reset_fields));
  57 #ifdef CONFIG_SOFTMMU
  58     cpu_m68k_set_sr(env, SR_S | SR_I);
  59 #else
  60     cpu_m68k_set_sr(env, 0);
  61 #endif
  62     for (i = 0; i < 8; i++) {
  63         env->fregs[i].d = nan;
  64     }
  65     cpu_m68k_set_fpcr(env, 0);
  66     env->fpsr = 0;
  67
  68     /* TODO: We should set PC from the interrupt vector.  */
  69     env->pc = 0;
  70 }
  71
  72 static void m68k_cpu_disas_set_info(CPUState *s, disassemble_info *info)
  73 {
  74     M68kCPU *cpu = M68K_CPU(s);
  75     CPUM68KState *env = &cpu->env;
  76     info->print_insn = print_insn_m68k;
  77     if (m68k_feature(env, M68K_FEATURE_M68000)) {
  78         info->mach = bfd_mach_m68040;
  79     }
  80 }
  81
  82 /* CPU models */
  83
  84 static ObjectClass *m68k_cpu_class_by_name(const char *cpu_model)
  85 {
  86     ObjectClass *oc;
  87     char *typename;
  88
  89     typename = g_strdup_printf(M68K_CPU_TYPE_NAME("%s"), cpu_model);
  90     oc = object_class_by_name(typename);
  91     g_free(typename);
  92     if (oc != NULL && (object_class_dynamic_cast(oc, TYPE_M68K_CPU) == NULL ||
  93                        object_class_is_abstract(oc))) {
  94         return NULL;
  95     }
  96     return oc;
  97 }
  98
  99 static void m5206_cpu_initfn(Object *obj)
 100 {
 101     M68kCPU *cpu = M68K_CPU(obj);
 102     CPUM68KState *env = &cpu->env;
 103
 104     m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 105 }
 106
 107 static void m68000_cpu_initfn(Object *obj)
 108 {
 109     M68kCPU *cpu = M68K_CPU(obj);
 110     CPUM68KState *env = &cpu->env;
 111
 112     m68k_set_feature(env, M68K_FEATURE_M68000);
 113     m68k_set_feature(env, M68K_FEATURE_USP);
 114     m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 115     m68k_set_feature(env, M68K_FEATURE_MOVEP);
 116 }
 117
 118 static void m68020_cpu_initfn(Object *obj)
 119 {
 120     M68kCPU *cpu = M68K_CPU(obj);
 121     CPUM68KState *env = &cpu->env;
 122
 123     m68k_set_feature(env, M68K_FEATURE_M68000);
 124     m68k_set_feature(env, M68K_FEATURE_USP);
 125     m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 126     m68k_set_feature(env, M68K_FEATURE_QUAD_MULDIV);
 127     m68k_set_feature(env, M68K_FEATURE_BRAL);
 128     m68k_set_feature(env, M68K_FEATURE_BCCL);
 129     m68k_set_feature(env, M68K_FEATURE_BITFIELD);
 130     m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
 131     m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
 132     m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
 133     m68k_set_feature(env, M68K_FEATURE_FPU);
 134     m68k_set_feature(env, M68K_FEATURE_CAS);
 135     m68k_set_feature(env, M68K_FEATURE_BKPT);
 136     m68k_set_feature(env, M68K_FEATURE_RTD);
 137     m68k_set_feature(env, M68K_FEATURE_CHK2);
 138     m68k_set_feature(env, M68K_FEATURE_MOVEP);
 139 }
 140 #define m68030_cpu_initfn m68020_cpu_initfn
 141
 142 static void m68040_cpu_initfn(Object *obj)
 143 {
 144     M68kCPU *cpu = M68K_CPU(obj);
 145     CPUM68KState *env = &cpu->env;
 146
 147     m68020_cpu_initfn(obj);
 148     m68k_set_feature(env, M68K_FEATURE_M68040);
 149 }
 150
 151 static void m68060_cpu_initfn(Object *obj)
 152 {
 153     M68kCPU *cpu = M68K_CPU(obj);
 154     CPUM68KState *env = &cpu->env;
 155
 156     m68k_set_feature(env, M68K_FEATURE_M68000);
 157     m68k_set_feature(env, M68K_FEATURE_USP);
 158     m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 159     m68k_set_feature(env, M68K_FEATURE_BRAL);
 160     m68k_set_feature(env, M68K_FEATURE_BCCL);
 161     m68k_set_feature(env, M68K_FEATURE_BITFIELD);
 162     m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
 163     m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
 164     m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
 165     m68k_set_feature(env, M68K_FEATURE_FPU);
 166     m68k_set_feature(env, M68K_FEATURE_CAS);
 167     m68k_set_feature(env, M68K_FEATURE_BKPT);
 168     m68k_set_feature(env, M68K_FEATURE_RTD);
 169     m68k_set_feature(env, M68K_FEATURE_CHK2);
 170 }
 171
 172 static void m5208_cpu_initfn(Object *obj)
 173 {
 174     M68kCPU *cpu = M68K_CPU(obj);
 175     CPUM68KState *env = &cpu->env;
 176
 177     m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 178     m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
 179     m68k_set_feature(env, M68K_FEATURE_BRAL);
 180     m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
 181     m68k_set_feature(env, M68K_FEATURE_USP);
 182 }
 183
 184 static void cfv4e_cpu_initfn(Object *obj)
 185 {
 186     M68kCPU *cpu = M68K_CPU(obj);
 187     CPUM68KState *env = &cpu->env;
 188
 189     m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 190     m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
 191     m68k_set_feature(env, M68K_FEATURE_BRAL);
 192     m68k_set_feature(env, M68K_FEATURE_CF_FPU);
 193     m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
 194     m68k_set_feature(env, M68K_FEATURE_USP);
 195 }
 196
 197 static void any_cpu_initfn(Object *obj)
 198 {
 199     M68kCPU *cpu = M68K_CPU(obj);
 200     CPUM68KState *env = &cpu->env;
 201
 202     m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 203     m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
 204     m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
 205     m68k_set_feature(env, M68K_FEATURE_BRAL);
 206     m68k_set_feature(env, M68K_FEATURE_CF_FPU);
 207     /* MAC and EMAC are mututally exclusive, so pick EMAC.
 208        It's mostly backwards compatible.  */
 209     m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
 210     m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B);
 211     m68k_set_feature(env, M68K_FEATURE_USP);
 212     m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
 213     m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 214 }
 215
 216 static void m68k_cpu_realizefn(DeviceState *dev, Error **errp)
 217 {
 218     CPUState *cs = CPU(dev);
 219     M68kCPU *cpu = M68K_CPU(dev);
 220     M68kCPUClass *mcc = M68K_CPU_GET_CLASS(dev);
 221     Error *local_err = NULL;
 222
 223     register_m68k_insns(&cpu->env);
 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
 245     cs->env_ptr = env;
 246 }
 247
 248 static const VMStateDescription vmstate_m68k_cpu = {
 249     .name = "cpu",
 250     .unmigratable = 1,
 251 };
 252
 253 static void m68k_cpu_class_init(ObjectClass *c, void *data)
 254 {
 255     M68kCPUClass *mcc = M68K_CPU_CLASS(c);
 256     CPUClass *cc = CPU_CLASS(c);
 257     DeviceClass *dc = DEVICE_CLASS(c);
 258
 259     device_class_set_parent_realize(dc, m68k_cpu_realizefn,
 260                                     &mcc->parent_realize);
 261     mcc->parent_reset = cc->reset;
 262     cc->reset = m68k_cpu_reset;
 263
 264     cc->class_by_name = m68k_cpu_class_by_name;
 265     cc->has_work = m68k_cpu_has_work;
 266     cc->do_interrupt = m68k_cpu_do_interrupt;
 267     cc->cpu_exec_interrupt = m68k_cpu_exec_interrupt;
 268     cc->dump_state = m68k_cpu_dump_state;
 269     cc->set_pc = m68k_cpu_set_pc;
 270     cc->gdb_read_register = m68k_cpu_gdb_read_register;
 271     cc->gdb_write_register = m68k_cpu_gdb_write_register;
 272     cc->handle_mmu_fault = m68k_cpu_handle_mmu_fault;
 273 #if defined(CONFIG_SOFTMMU)
 274     cc->do_unassigned_access = m68k_cpu_unassigned_access;
 275     cc->get_phys_page_debug = m68k_cpu_get_phys_page_debug;
 276 #endif
 277     cc->disas_set_info = m68k_cpu_disas_set_info;
 278     cc->tcg_initialize = m68k_tcg_init;
 279
 280     cc->gdb_num_core_regs = 18;
 281     cc->gdb_core_xml_file = "cf-core.xml";
 282
 283     dc->vmsd = &vmstate_m68k_cpu;
 284 }
 285
 286 #define DEFINE_M68K_CPU_TYPE(cpu_model, initfn) \
 287     {                                           \
 288         .name = M68K_CPU_TYPE_NAME(cpu_model),  \
 289         .instance_init = initfn,                \
 290         .parent = TYPE_M68K_CPU,                \
 291     }
 292
 293 static const TypeInfo m68k_cpus_type_infos[] = {
 294     { /* base class should be registered first */
 295         .name = TYPE_M68K_CPU,
 296         .parent = TYPE_CPU,
 297         .instance_size = sizeof(M68kCPU),
 298         .instance_init = m68k_cpu_initfn,
 299         .abstract = true,
 300         .class_size = sizeof(M68kCPUClass),
 301         .class_init = m68k_cpu_class_init,
 302     },
 303     DEFINE_M68K_CPU_TYPE("m68000", m68000_cpu_initfn),
 304     DEFINE_M68K_CPU_TYPE("m68020", m68020_cpu_initfn),
 305     DEFINE_M68K_CPU_TYPE("m68030", m68030_cpu_initfn),
 306     DEFINE_M68K_CPU_TYPE("m68040", m68040_cpu_initfn),
 307     DEFINE_M68K_CPU_TYPE("m68060", m68060_cpu_initfn),
 308     DEFINE_M68K_CPU_TYPE("m5206", m5206_cpu_initfn),
 309     DEFINE_M68K_CPU_TYPE("m5208", m5208_cpu_initfn),
 310     DEFINE_M68K_CPU_TYPE("cfv4e", cfv4e_cpu_initfn),
 311     DEFINE_M68K_CPU_TYPE("any", any_cpu_initfn),
 312 };
 313
 314 DEFINE_TYPES(m68k_cpus_type_infos)