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 static void m68k_cpu_reset(DeviceState *dev) 45 { 46 CPUState *s = CPU(dev); 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(dev); 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 device_class_set_parent_reset(dc, m68k_cpu_reset, &mcc->parent_reset); 277 278 cc->class_by_name = m68k_cpu_class_by_name; 279 cc->has_work = m68k_cpu_has_work; 280 cc->do_interrupt = m68k_cpu_do_interrupt; 281 cc->cpu_exec_interrupt = m68k_cpu_exec_interrupt; 282 cc->dump_state = m68k_cpu_dump_state; 283 cc->set_pc = m68k_cpu_set_pc; 284 cc->gdb_read_register = m68k_cpu_gdb_read_register; 285 cc->gdb_write_register = m68k_cpu_gdb_write_register; 286 cc->tlb_fill = m68k_cpu_tlb_fill; 287 #if defined(CONFIG_SOFTMMU) 288 cc->do_transaction_failed = m68k_cpu_transaction_failed; 289 cc->get_phys_page_debug = m68k_cpu_get_phys_page_debug; 290 #endif 291 cc->disas_set_info = m68k_cpu_disas_set_info; 292 cc->tcg_initialize = m68k_tcg_init; 293 294 cc->gdb_num_core_regs = 18; 295 296 dc->vmsd = &vmstate_m68k_cpu; 297 } 298 299 static void m68k_cpu_class_init_cf_core(ObjectClass *c, void *data) 300 { 301 CPUClass *cc = CPU_CLASS(c); 302 303 cc->gdb_core_xml_file = "cf-core.xml"; 304 } 305 306 #define DEFINE_M68K_CPU_TYPE_CF(model) \ 307 { \ 308 .name = M68K_CPU_TYPE_NAME(#model), \ 309 .instance_init = model##_cpu_initfn, \ 310 .parent = TYPE_M68K_CPU, \ 311 .class_init = m68k_cpu_class_init_cf_core \ 312 } 313 314 static void m68k_cpu_class_init_m68k_core(ObjectClass *c, void *data) 315 { 316 CPUClass *cc = CPU_CLASS(c); 317 318 cc->gdb_core_xml_file = "m68k-core.xml"; 319 } 320 321 #define DEFINE_M68K_CPU_TYPE_M68K(model) \ 322 { \ 323 .name = M68K_CPU_TYPE_NAME(#model), \ 324 .instance_init = model##_cpu_initfn, \ 325 .parent = TYPE_M68K_CPU, \ 326 .class_init = m68k_cpu_class_init_m68k_core \ 327 } 328 329 static const TypeInfo m68k_cpus_type_infos[] = { 330 { /* base class should be registered first */ 331 .name = TYPE_M68K_CPU, 332 .parent = TYPE_CPU, 333 .instance_size = sizeof(M68kCPU), 334 .instance_init = m68k_cpu_initfn, 335 .abstract = true, 336 .class_size = sizeof(M68kCPUClass), 337 .class_init = m68k_cpu_class_init, 338 }, 339 DEFINE_M68K_CPU_TYPE_M68K(m68000), 340 DEFINE_M68K_CPU_TYPE_M68K(m68020), 341 DEFINE_M68K_CPU_TYPE_M68K(m68030), 342 DEFINE_M68K_CPU_TYPE_M68K(m68040), 343 DEFINE_M68K_CPU_TYPE_M68K(m68060), 344 DEFINE_M68K_CPU_TYPE_CF(m5206), 345 DEFINE_M68K_CPU_TYPE_CF(m5208), 346 DEFINE_M68K_CPU_TYPE_CF(cfv4e), 347 DEFINE_M68K_CPU_TYPE_CF(any), 348 }; 349 350 DEFINE_TYPES(m68k_cpus_type_infos) 351