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 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 #if !defined(CONFIG_USER_ONLY) 59 env->sr = 0x2700; 60 #endif 61 m68k_switch_sp(env); 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 cpu_m68k_set_ccr(env, 0); 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 if (cpu_model == NULL) { 91 return NULL; 92 } 93 94 typename = g_strdup_printf("%s-" TYPE_M68K_CPU, cpu_model); 95 oc = object_class_by_name(typename); 96 g_free(typename); 97 if (oc != NULL && (object_class_dynamic_cast(oc, TYPE_M68K_CPU) == NULL || 98 object_class_is_abstract(oc))) { 99 return NULL; 100 } 101 return oc; 102 } 103 104 static void m5206_cpu_initfn(Object *obj) 105 { 106 M68kCPU *cpu = M68K_CPU(obj); 107 CPUM68KState *env = &cpu->env; 108 109 m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); 110 } 111 112 static void m68000_cpu_initfn(Object *obj) 113 { 114 M68kCPU *cpu = M68K_CPU(obj); 115 CPUM68KState *env = &cpu->env; 116 117 m68k_set_feature(env, M68K_FEATURE_M68000); 118 m68k_set_feature(env, M68K_FEATURE_USP); 119 m68k_set_feature(env, M68K_FEATURE_WORD_INDEX); 120 } 121 122 static void m68020_cpu_initfn(Object *obj) 123 { 124 M68kCPU *cpu = M68K_CPU(obj); 125 CPUM68KState *env = &cpu->env; 126 127 m68k_set_feature(env, M68K_FEATURE_M68000); 128 m68k_set_feature(env, M68K_FEATURE_USP); 129 m68k_set_feature(env, M68K_FEATURE_WORD_INDEX); 130 m68k_set_feature(env, M68K_FEATURE_QUAD_MULDIV); 131 m68k_set_feature(env, M68K_FEATURE_BRAL); 132 m68k_set_feature(env, M68K_FEATURE_BCCL); 133 m68k_set_feature(env, M68K_FEATURE_BITFIELD); 134 m68k_set_feature(env, M68K_FEATURE_EXT_FULL); 135 m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX); 136 m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV); 137 m68k_set_feature(env, M68K_FEATURE_FPU); 138 m68k_set_feature(env, M68K_FEATURE_CAS); 139 m68k_set_feature(env, M68K_FEATURE_BKPT); 140 m68k_set_feature(env, M68K_FEATURE_RTD); 141 } 142 #define m68030_cpu_initfn m68020_cpu_initfn 143 #define m68040_cpu_initfn m68020_cpu_initfn 144 145 static void m68060_cpu_initfn(Object *obj) 146 { 147 M68kCPU *cpu = M68K_CPU(obj); 148 CPUM68KState *env = &cpu->env; 149 150 m68k_set_feature(env, M68K_FEATURE_M68000); 151 m68k_set_feature(env, M68K_FEATURE_USP); 152 m68k_set_feature(env, M68K_FEATURE_WORD_INDEX); 153 m68k_set_feature(env, M68K_FEATURE_BRAL); 154 m68k_set_feature(env, M68K_FEATURE_BCCL); 155 m68k_set_feature(env, M68K_FEATURE_BITFIELD); 156 m68k_set_feature(env, M68K_FEATURE_EXT_FULL); 157 m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX); 158 m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV); 159 m68k_set_feature(env, M68K_FEATURE_FPU); 160 m68k_set_feature(env, M68K_FEATURE_CAS); 161 m68k_set_feature(env, M68K_FEATURE_BKPT); 162 m68k_set_feature(env, M68K_FEATURE_RTD); 163 } 164 165 static void m5208_cpu_initfn(Object *obj) 166 { 167 M68kCPU *cpu = M68K_CPU(obj); 168 CPUM68KState *env = &cpu->env; 169 170 m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); 171 m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC); 172 m68k_set_feature(env, M68K_FEATURE_BRAL); 173 m68k_set_feature(env, M68K_FEATURE_CF_EMAC); 174 m68k_set_feature(env, M68K_FEATURE_USP); 175 } 176 177 static void cfv4e_cpu_initfn(Object *obj) 178 { 179 M68kCPU *cpu = M68K_CPU(obj); 180 CPUM68KState *env = &cpu->env; 181 182 m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); 183 m68k_set_feature(env, M68K_FEATURE_CF_ISA_B); 184 m68k_set_feature(env, M68K_FEATURE_BRAL); 185 m68k_set_feature(env, M68K_FEATURE_CF_FPU); 186 m68k_set_feature(env, M68K_FEATURE_CF_EMAC); 187 m68k_set_feature(env, M68K_FEATURE_USP); 188 } 189 190 static void any_cpu_initfn(Object *obj) 191 { 192 M68kCPU *cpu = M68K_CPU(obj); 193 CPUM68KState *env = &cpu->env; 194 195 m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); 196 m68k_set_feature(env, M68K_FEATURE_CF_ISA_B); 197 m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC); 198 m68k_set_feature(env, M68K_FEATURE_BRAL); 199 m68k_set_feature(env, M68K_FEATURE_CF_FPU); 200 /* MAC and EMAC are mututally exclusive, so pick EMAC. 201 It's mostly backwards compatible. */ 202 m68k_set_feature(env, M68K_FEATURE_CF_EMAC); 203 m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B); 204 m68k_set_feature(env, M68K_FEATURE_USP); 205 m68k_set_feature(env, M68K_FEATURE_EXT_FULL); 206 m68k_set_feature(env, M68K_FEATURE_WORD_INDEX); 207 } 208 209 typedef struct M68kCPUInfo { 210 const char *name; 211 void (*instance_init)(Object *obj); 212 } M68kCPUInfo; 213 214 static const M68kCPUInfo m68k_cpus[] = { 215 { .name = "m68000", .instance_init = m68000_cpu_initfn }, 216 { .name = "m68020", .instance_init = m68020_cpu_initfn }, 217 { .name = "m68030", .instance_init = m68030_cpu_initfn }, 218 { .name = "m68040", .instance_init = m68040_cpu_initfn }, 219 { .name = "m68060", .instance_init = m68060_cpu_initfn }, 220 { .name = "m5206", .instance_init = m5206_cpu_initfn }, 221 { .name = "m5208", .instance_init = m5208_cpu_initfn }, 222 { .name = "cfv4e", .instance_init = cfv4e_cpu_initfn }, 223 { .name = "any", .instance_init = any_cpu_initfn }, 224 }; 225 226 static void m68k_cpu_realizefn(DeviceState *dev, Error **errp) 227 { 228 CPUState *cs = CPU(dev); 229 M68kCPU *cpu = M68K_CPU(dev); 230 M68kCPUClass *mcc = M68K_CPU_GET_CLASS(dev); 231 Error *local_err = NULL; 232 233 cpu_exec_realizefn(cs, &local_err); 234 if (local_err != NULL) { 235 error_propagate(errp, local_err); 236 return; 237 } 238 239 m68k_cpu_init_gdb(cpu); 240 241 cpu_reset(cs); 242 qemu_init_vcpu(cs); 243 244 mcc->parent_realize(dev, errp); 245 } 246 247 static void m68k_cpu_initfn(Object *obj) 248 { 249 CPUState *cs = CPU(obj); 250 M68kCPU *cpu = M68K_CPU(obj); 251 CPUM68KState *env = &cpu->env; 252 static bool inited; 253 254 cs->env_ptr = env; 255 256 if (tcg_enabled() && !inited) { 257 inited = true; 258 m68k_tcg_init(); 259 } 260 } 261 262 static const VMStateDescription vmstate_m68k_cpu = { 263 .name = "cpu", 264 .unmigratable = 1, 265 }; 266 267 static void m68k_cpu_class_init(ObjectClass *c, void *data) 268 { 269 M68kCPUClass *mcc = M68K_CPU_CLASS(c); 270 CPUClass *cc = CPU_CLASS(c); 271 DeviceClass *dc = DEVICE_CLASS(c); 272 273 mcc->parent_realize = dc->realize; 274 dc->realize = m68k_cpu_realizefn; 275 276 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 #ifdef CONFIG_USER_ONLY 288 cc->handle_mmu_fault = m68k_cpu_handle_mmu_fault; 289 #else 290 cc->get_phys_page_debug = m68k_cpu_get_phys_page_debug; 291 #endif 292 cc->disas_set_info = m68k_cpu_disas_set_info; 293 294 cc->gdb_num_core_regs = 18; 295 cc->gdb_core_xml_file = "cf-core.xml"; 296 297 dc->vmsd = &vmstate_m68k_cpu; 298 } 299 300 static void register_cpu_type(const M68kCPUInfo *info) 301 { 302 TypeInfo type_info = { 303 .parent = TYPE_M68K_CPU, 304 .instance_init = info->instance_init, 305 }; 306 307 type_info.name = g_strdup_printf("%s-" TYPE_M68K_CPU, info->name); 308 type_register(&type_info); 309 g_free((void *)type_info.name); 310 } 311 312 static const TypeInfo m68k_cpu_type_info = { 313 .name = TYPE_M68K_CPU, 314 .parent = TYPE_CPU, 315 .instance_size = sizeof(M68kCPU), 316 .instance_init = m68k_cpu_initfn, 317 .abstract = true, 318 .class_size = sizeof(M68kCPUClass), 319 .class_init = m68k_cpu_class_init, 320 }; 321 322 static void m68k_cpu_register_types(void) 323 { 324 int i; 325 326 type_register_static(&m68k_cpu_type_info); 327 for (i = 0; i < ARRAY_SIZE(m68k_cpus); i++) { 328 register_cpu_type(&m68k_cpus[i]); 329 } 330 } 331 332 type_init(m68k_cpu_register_types) 333