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 "migration/vmstate.h"
  25 #include "fpu/softfloat.h"
  26
  27 static void m68k_cpu_set_pc(CPUState *cs, vaddr value)
  28 {
  29     M68kCPU *cpu = M68K_CPU(cs);
  30
  31     cpu->env.pc = value;
  32 }
  33
  34 static bool m68k_cpu_has_work(CPUState *cs)
  35 {
  36     return cs->interrupt_request & CPU_INTERRUPT_HARD;
  37 }
  38
  39 static void m68k_set_feature(CPUM68KState *env, int feature)
  40 {
  41     env->features |= (1u << feature);
  42 }
  43
  44 /* CPUClass::reset() */
  45 static void m68k_cpu_reset(CPUState *s)
  46 {
  47     M68kCPU *cpu = M68K_CPU(s);
  48     M68kCPUClass *mcc = M68K_CPU_GET_CLASS(cpu);
  49     CPUM68KState *env = &cpu->env;
  50     floatx80 nan = floatx80_default_nan(NULL);
  51     int i;
  52
  53     mcc->parent_reset(s);
  54
  55     memset(env, 0, offsetof(CPUM68KState, end_reset_fields));
  56 #ifdef CONFIG_SOFTMMU
  57     cpu_m68k_set_sr(env, SR_S | SR_I);
  58 #else
  59     cpu_m68k_set_sr(env, 0);
  60 #endif
  61     for (i = 0; i < 8; i++) {
  62         env->fregs[i].d = nan;
  63     }
  64     cpu_m68k_set_fpcr(env, 0);
  65     env->fpsr = 0;
  66
  67     /* TODO: We should set PC from the interrupt vector.  */
  68     env->pc = 0;
  69 }
  70
  71 static void m68k_cpu_disas_set_info(CPUState *s, disassemble_info *info)
  72 {
  73     M68kCPU *cpu = M68K_CPU(s);
  74     CPUM68KState *env = &cpu->env;
  75     info->print_insn = print_insn_m68k;
  76     if (m68k_feature(env, M68K_FEATURE_M68000)) {
  77         info->mach = bfd_mach_m68040;
  78     }
  79 }
  80
  81 /* CPU models */
  82
  83 static ObjectClass *m68k_cpu_class_by_name(const char *cpu_model)
  84 {
  85     ObjectClass *oc;
  86     char *typename;
  87
  88     typename = g_strdup_printf(M68K_CPU_TYPE_NAME("%s"), 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     m68k_set_feature(env, M68K_FEATURE_MOVEP);
 115 }
 116
 117 /* common features for 68020, 68030 and 68040 */
 118 static void m680x0_cpu_common(CPUM68KState *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     m68k_set_feature(env, M68K_FEATURE_CHK2);
 135     m68k_set_feature(env, M68K_FEATURE_MOVEP);
 136 }
 137
 138 static void m68020_cpu_initfn(Object *obj)
 139 {
 140     M68kCPU *cpu = M68K_CPU(obj);
 141     CPUM68KState *env = &cpu->env;
 142
 143     m680x0_cpu_common(env);
 144     m68k_set_feature(env, M68K_FEATURE_M68020);
 145 }
 146
 147 static void m68030_cpu_initfn(Object *obj)
 148 {
 149     M68kCPU *cpu = M68K_CPU(obj);
 150     CPUM68KState *env = &cpu->env;
 151
 152     m680x0_cpu_common(env);
 153     m68k_set_feature(env, M68K_FEATURE_M68030);
 154 }
 155
 156 static void m68040_cpu_initfn(Object *obj)
 157 {
 158     M68kCPU *cpu = M68K_CPU(obj);
 159     CPUM68KState *env = &cpu->env;
 160
 161     m680x0_cpu_common(env);
 162     m68k_set_feature(env, M68K_FEATURE_M68040);
 163 }
 164
 165 static void m68060_cpu_initfn(Object *obj)
 166 {
 167     M68kCPU *cpu = M68K_CPU(obj);
 168     CPUM68KState *env = &cpu->env;
 169
 170     m68k_set_feature(env, M68K_FEATURE_M68000);
 171     m68k_set_feature(env, M68K_FEATURE_USP);
 172     m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 173     m68k_set_feature(env, M68K_FEATURE_BRAL);
 174     m68k_set_feature(env, M68K_FEATURE_BCCL);
 175     m68k_set_feature(env, M68K_FEATURE_BITFIELD);
 176     m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
 177     m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
 178     m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
 179     m68k_set_feature(env, M68K_FEATURE_FPU);
 180     m68k_set_feature(env, M68K_FEATURE_CAS);
 181     m68k_set_feature(env, M68K_FEATURE_BKPT);
 182     m68k_set_feature(env, M68K_FEATURE_RTD);
 183     m68k_set_feature(env, M68K_FEATURE_CHK2);
 184     m68k_set_feature(env, M68K_FEATURE_M68060);
 185 }
 186
 187 static void m5208_cpu_initfn(Object *obj)
 188 {
 189     M68kCPU *cpu = M68K_CPU(obj);
 190     CPUM68KState *env = &cpu->env;
 191
 192     m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 193     m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
 194     m68k_set_feature(env, M68K_FEATURE_BRAL);
 195     m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
 196     m68k_set_feature(env, M68K_FEATURE_USP);
 197 }
 198
 199 static void cfv4e_cpu_initfn(Object *obj)
 200 {
 201     M68kCPU *cpu = M68K_CPU(obj);
 202     CPUM68KState *env = &cpu->env;
 203
 204     m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 205     m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
 206     m68k_set_feature(env, M68K_FEATURE_BRAL);
 207     m68k_set_feature(env, M68K_FEATURE_CF_FPU);
 208     m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
 209     m68k_set_feature(env, M68K_FEATURE_USP);
 210 }
 211
 212 static void any_cpu_initfn(Object *obj)
 213 {
 214     M68kCPU *cpu = M68K_CPU(obj);
 215     CPUM68KState *env = &cpu->env;
 216
 217     m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
 218     m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
 219     m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
 220     m68k_set_feature(env, M68K_FEATURE_BRAL);
 221     m68k_set_feature(env, M68K_FEATURE_CF_FPU);
 222     /*
 223      * MAC and EMAC are mututally exclusive, so pick EMAC.
 224      * It's mostly backwards compatible.
 225      */
 226     m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
 227     m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B);
 228     m68k_set_feature(env, M68K_FEATURE_USP);
 229     m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
 230     m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
 231 }
 232
 233 static void m68k_cpu_realizefn(DeviceState *dev, Error **errp)
 234 {
 235     CPUState *cs = CPU(dev);
 236     M68kCPU *cpu = M68K_CPU(dev);
 237     M68kCPUClass *mcc = M68K_CPU_GET_CLASS(dev);
 238     Error *local_err = NULL;
 239
 240     register_m68k_insns(&cpu->env);
 241
 242     cpu_exec_realizefn(cs, &local_err);
 243     if (local_err != NULL) {
 244         error_propagate(errp, local_err);
 245         return;
 246     }
 247
 248     m68k_cpu_init_gdb(cpu);
 249
 250     cpu_reset(cs);
 251     qemu_init_vcpu(cs);
 252
 253     mcc->parent_realize(dev, errp);
 254 }
 255
 256 static void m68k_cpu_initfn(Object *obj)
 257 {
 258     M68kCPU *cpu = M68K_CPU(obj);
 259
 260     cpu_set_cpustate_pointers(cpu);
 261 }
 262
 263 static const VMStateDescription vmstate_m68k_cpu = {
 264     .name = "cpu",
 265     .unmigratable = 1,
 266 };
 267
 268 static void m68k_cpu_class_init(ObjectClass *c, void *data)
 269 {
 270     M68kCPUClass *mcc = M68K_CPU_CLASS(c);
 271     CPUClass *cc = CPU_CLASS(c);
 272     DeviceClass *dc = DEVICE_CLASS(c);
 273
 274     device_class_set_parent_realize(dc, m68k_cpu_realizefn,
 275                                     &mcc->parent_realize);
 276     mcc->parent_reset = cc->reset;
 277     cc->reset = m68k_cpu_reset;
 278
 279     cc->class_by_name = m68k_cpu_class_by_name;
 280     cc->has_work = m68k_cpu_has_work;
 281     cc->do_interrupt = m68k_cpu_do_interrupt;
 282     cc->cpu_exec_interrupt = m68k_cpu_exec_interrupt;
 283     cc->dump_state = m68k_cpu_dump_state;
 284     cc->set_pc = m68k_cpu_set_pc;
 285     cc->gdb_read_register = m68k_cpu_gdb_read_register;
 286     cc->gdb_write_register = m68k_cpu_gdb_write_register;
 287     cc->tlb_fill = m68k_cpu_tlb_fill;
 288 #if defined(CONFIG_SOFTMMU)
 289     cc->do_transaction_failed = m68k_cpu_transaction_failed;
 290     cc->get_phys_page_debug = m68k_cpu_get_phys_page_debug;
 291 #endif
 292     cc->disas_set_info = m68k_cpu_disas_set_info;
 293     cc->tcg_initialize = m68k_tcg_init;
 294
 295     cc->gdb_num_core_regs = 18;
 296     cc->gdb_core_xml_file = "cf-core.xml";
 297
 298     dc->vmsd = &vmstate_m68k_cpu;
 299 }
 300
 301 #define DEFINE_M68K_CPU_TYPE(cpu_model, initfn) \
 302     {                                           \
 303         .name = M68K_CPU_TYPE_NAME(cpu_model),  \
 304         .instance_init = initfn,                \
 305         .parent = TYPE_M68K_CPU,                \
 306     }
 307
 308 static const TypeInfo m68k_cpus_type_infos[] = {
 309     { /* base class should be registered first */
 310         .name = TYPE_M68K_CPU,
 311         .parent = TYPE_CPU,
 312         .instance_size = sizeof(M68kCPU),
 313         .instance_init = m68k_cpu_initfn,
 314         .abstract = true,
 315         .class_size = sizeof(M68kCPUClass),
 316         .class_init = m68k_cpu_class_init,
 317     },
 318     DEFINE_M68K_CPU_TYPE("m68000", m68000_cpu_initfn),
 319     DEFINE_M68K_CPU_TYPE("m68020", m68020_cpu_initfn),
 320     DEFINE_M68K_CPU_TYPE("m68030", m68030_cpu_initfn),
 321     DEFINE_M68K_CPU_TYPE("m68040", m68040_cpu_initfn),
 322     DEFINE_M68K_CPU_TYPE("m68060", m68060_cpu_initfn),
 323     DEFINE_M68K_CPU_TYPE("m5206", m5206_cpu_initfn),
 324     DEFINE_M68K_CPU_TYPE("m5208", m5208_cpu_initfn),
 325     DEFINE_M68K_CPU_TYPE("cfv4e", cfv4e_cpu_initfn),
 326     DEFINE_M68K_CPU_TYPE("any", any_cpu_initfn),
 327 };
 328
 329 DEFINE_TYPES(m68k_cpus_type_infos)