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 53 mcc->parent_reset(s); 54 55 memset(env, 0, offsetof(CPUM68KState, features)); 56 #if !defined(CONFIG_USER_ONLY) 57 env->sr = 0x2700; 58 #endif 59 m68k_switch_sp(env); 60 /* ??? FP regs should be initialized to NaN. */ 61 cpu_m68k_set_ccr(env, 0); 62 /* TODO: We should set PC from the interrupt vector. */ 63 env->pc = 0; 64 tlb_flush(s, 1); 65 } 66 67 static void m68k_cpu_disas_set_info(CPUState *s, disassemble_info *info) 68 { 69 M68kCPU *cpu = M68K_CPU(s); 70 CPUM68KState *env = &cpu->env; 71 info->print_insn = print_insn_m68k; 72 if (m68k_feature(env, M68K_FEATURE_M68000)) { 73 info->mach = bfd_mach_m68040; 74 } 75 } 76 77 /* CPU models */ 78 79 static ObjectClass *m68k_cpu_class_by_name(const char *cpu_model) 80 { 81 ObjectClass *oc; 82 char *typename; 83 84 if (cpu_model == NULL) { 85 return NULL; 86 } 87 88 typename = g_strdup_printf("%s-" TYPE_M68K_CPU, 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 } 115 116 static void m68020_cpu_initfn(Object *obj) 117 { 118 M68kCPU *cpu = M68K_CPU(obj); 119 CPUM68KState *env = &cpu->env; 120 121 m68k_set_feature(env, M68K_FEATURE_M68000); 122 m68k_set_feature(env, M68K_FEATURE_USP); 123 m68k_set_feature(env, M68K_FEATURE_WORD_INDEX); 124 m68k_set_feature(env, M68K_FEATURE_QUAD_MULDIV); 125 m68k_set_feature(env, M68K_FEATURE_BRAL); 126 m68k_set_feature(env, M68K_FEATURE_BCCL); 127 m68k_set_feature(env, M68K_FEATURE_BITFIELD); 128 m68k_set_feature(env, M68K_FEATURE_EXT_FULL); 129 m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX); 130 m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV); 131 m68k_set_feature(env, M68K_FEATURE_FPU); 132 m68k_set_feature(env, M68K_FEATURE_CAS); 133 m68k_set_feature(env, M68K_FEATURE_BKPT); 134 } 135 #define m68030_cpu_initfn m68020_cpu_initfn 136 #define m68040_cpu_initfn m68020_cpu_initfn 137 138 static void m68060_cpu_initfn(Object *obj) 139 { 140 M68kCPU *cpu = M68K_CPU(obj); 141 CPUM68KState *env = &cpu->env; 142 143 m68k_set_feature(env, M68K_FEATURE_M68000); 144 m68k_set_feature(env, M68K_FEATURE_USP); 145 m68k_set_feature(env, M68K_FEATURE_WORD_INDEX); 146 m68k_set_feature(env, M68K_FEATURE_BRAL); 147 m68k_set_feature(env, M68K_FEATURE_BCCL); 148 m68k_set_feature(env, M68K_FEATURE_BITFIELD); 149 m68k_set_feature(env, M68K_FEATURE_EXT_FULL); 150 m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX); 151 m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV); 152 m68k_set_feature(env, M68K_FEATURE_FPU); 153 m68k_set_feature(env, M68K_FEATURE_CAS); 154 m68k_set_feature(env, M68K_FEATURE_BKPT); 155 } 156 157 static void m5208_cpu_initfn(Object *obj) 158 { 159 M68kCPU *cpu = M68K_CPU(obj); 160 CPUM68KState *env = &cpu->env; 161 162 m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); 163 m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC); 164 m68k_set_feature(env, M68K_FEATURE_BRAL); 165 m68k_set_feature(env, M68K_FEATURE_CF_EMAC); 166 m68k_set_feature(env, M68K_FEATURE_USP); 167 } 168 169 static void cfv4e_cpu_initfn(Object *obj) 170 { 171 M68kCPU *cpu = M68K_CPU(obj); 172 CPUM68KState *env = &cpu->env; 173 174 m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); 175 m68k_set_feature(env, M68K_FEATURE_CF_ISA_B); 176 m68k_set_feature(env, M68K_FEATURE_BRAL); 177 m68k_set_feature(env, M68K_FEATURE_CF_FPU); 178 m68k_set_feature(env, M68K_FEATURE_CF_EMAC); 179 m68k_set_feature(env, M68K_FEATURE_USP); 180 } 181 182 static void any_cpu_initfn(Object *obj) 183 { 184 M68kCPU *cpu = M68K_CPU(obj); 185 CPUM68KState *env = &cpu->env; 186 187 m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); 188 m68k_set_feature(env, M68K_FEATURE_CF_ISA_B); 189 m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC); 190 m68k_set_feature(env, M68K_FEATURE_BRAL); 191 m68k_set_feature(env, M68K_FEATURE_CF_FPU); 192 /* MAC and EMAC are mututally exclusive, so pick EMAC. 193 It's mostly backwards compatible. */ 194 m68k_set_feature(env, M68K_FEATURE_CF_EMAC); 195 m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B); 196 m68k_set_feature(env, M68K_FEATURE_USP); 197 m68k_set_feature(env, M68K_FEATURE_EXT_FULL); 198 m68k_set_feature(env, M68K_FEATURE_WORD_INDEX); 199 } 200 201 typedef struct M68kCPUInfo { 202 const char *name; 203 void (*instance_init)(Object *obj); 204 } M68kCPUInfo; 205 206 static const M68kCPUInfo m68k_cpus[] = { 207 { .name = "m68000", .instance_init = m68000_cpu_initfn }, 208 { .name = "m68020", .instance_init = m68020_cpu_initfn }, 209 { .name = "m68030", .instance_init = m68030_cpu_initfn }, 210 { .name = "m68040", .instance_init = m68040_cpu_initfn }, 211 { .name = "m68060", .instance_init = m68060_cpu_initfn }, 212 { .name = "m5206", .instance_init = m5206_cpu_initfn }, 213 { .name = "m5208", .instance_init = m5208_cpu_initfn }, 214 { .name = "cfv4e", .instance_init = cfv4e_cpu_initfn }, 215 { .name = "any", .instance_init = any_cpu_initfn }, 216 }; 217 218 static void m68k_cpu_realizefn(DeviceState *dev, Error **errp) 219 { 220 CPUState *cs = CPU(dev); 221 M68kCPU *cpu = M68K_CPU(dev); 222 M68kCPUClass *mcc = M68K_CPU_GET_CLASS(dev); 223 Error *local_err = NULL; 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 static bool inited; 245 246 cs->env_ptr = env; 247 248 if (tcg_enabled() && !inited) { 249 inited = true; 250 m68k_tcg_init(); 251 } 252 } 253 254 static const VMStateDescription vmstate_m68k_cpu = { 255 .name = "cpu", 256 .unmigratable = 1, 257 }; 258 259 static void m68k_cpu_class_init(ObjectClass *c, void *data) 260 { 261 M68kCPUClass *mcc = M68K_CPU_CLASS(c); 262 CPUClass *cc = CPU_CLASS(c); 263 DeviceClass *dc = DEVICE_CLASS(c); 264 265 mcc->parent_realize = dc->realize; 266 dc->realize = m68k_cpu_realizefn; 267 268 mcc->parent_reset = cc->reset; 269 cc->reset = m68k_cpu_reset; 270 271 cc->class_by_name = m68k_cpu_class_by_name; 272 cc->has_work = m68k_cpu_has_work; 273 cc->do_interrupt = m68k_cpu_do_interrupt; 274 cc->cpu_exec_interrupt = m68k_cpu_exec_interrupt; 275 cc->dump_state = m68k_cpu_dump_state; 276 cc->set_pc = m68k_cpu_set_pc; 277 cc->gdb_read_register = m68k_cpu_gdb_read_register; 278 cc->gdb_write_register = m68k_cpu_gdb_write_register; 279 #ifdef CONFIG_USER_ONLY 280 cc->handle_mmu_fault = m68k_cpu_handle_mmu_fault; 281 #else 282 cc->get_phys_page_debug = m68k_cpu_get_phys_page_debug; 283 #endif 284 cc->disas_set_info = m68k_cpu_disas_set_info; 285 286 cc->gdb_num_core_regs = 18; 287 cc->gdb_core_xml_file = "cf-core.xml"; 288 289 dc->vmsd = &vmstate_m68k_cpu; 290 } 291 292 static void register_cpu_type(const M68kCPUInfo *info) 293 { 294 TypeInfo type_info = { 295 .parent = TYPE_M68K_CPU, 296 .instance_init = info->instance_init, 297 }; 298 299 type_info.name = g_strdup_printf("%s-" TYPE_M68K_CPU, info->name); 300 type_register(&type_info); 301 g_free((void *)type_info.name); 302 } 303 304 static const TypeInfo m68k_cpu_type_info = { 305 .name = TYPE_M68K_CPU, 306 .parent = TYPE_CPU, 307 .instance_size = sizeof(M68kCPU), 308 .instance_init = m68k_cpu_initfn, 309 .abstract = true, 310 .class_size = sizeof(M68kCPUClass), 311 .class_init = m68k_cpu_class_init, 312 }; 313 314 static void m68k_cpu_register_types(void) 315 { 316 int i; 317 318 type_register_static(&m68k_cpu_type_info); 319 for (i = 0; i < ARRAY_SIZE(m68k_cpus); i++) { 320 register_cpu_type(&m68k_cpus[i]); 321 } 322 } 323 324 type_init(m68k_cpu_register_types) 325