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 #ifdef CONFIG_SOFTMMU 59 cpu_m68k_set_sr(env, SR_S | SR_I); 60 #else 61 cpu_m68k_set_sr(env, 0); 62 #endif 63 for (i = 0; i < 8; i++) { 64 env->fregs[i].d = nan; 65 } 66 cpu_m68k_set_fpcr(env, 0); 67 env->fpsr = 0; 68 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 typename = g_strdup_printf(M68K_CPU_TYPE_NAME("%s"), cpu_model); 91 oc = object_class_by_name(typename); 92 g_free(typename); 93 if (oc != NULL && (object_class_dynamic_cast(oc, TYPE_M68K_CPU) == NULL || 94 object_class_is_abstract(oc))) { 95 return NULL; 96 } 97 return oc; 98 } 99 100 static void m5206_cpu_initfn(Object *obj) 101 { 102 M68kCPU *cpu = M68K_CPU(obj); 103 CPUM68KState *env = &cpu->env; 104 105 m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); 106 } 107 108 static void m68000_cpu_initfn(Object *obj) 109 { 110 M68kCPU *cpu = M68K_CPU(obj); 111 CPUM68KState *env = &cpu->env; 112 113 m68k_set_feature(env, M68K_FEATURE_M68000); 114 m68k_set_feature(env, M68K_FEATURE_USP); 115 m68k_set_feature(env, M68K_FEATURE_WORD_INDEX); 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 } 139 #define m68030_cpu_initfn m68020_cpu_initfn 140 141 static void m68040_cpu_initfn(Object *obj) 142 { 143 M68kCPU *cpu = M68K_CPU(obj); 144 CPUM68KState *env = &cpu->env; 145 146 m68020_cpu_initfn(obj); 147 m68k_set_feature(env, M68K_FEATURE_M68040); 148 } 149 150 static void m68060_cpu_initfn(Object *obj) 151 { 152 M68kCPU *cpu = M68K_CPU(obj); 153 CPUM68KState *env = &cpu->env; 154 155 m68k_set_feature(env, M68K_FEATURE_M68000); 156 m68k_set_feature(env, M68K_FEATURE_USP); 157 m68k_set_feature(env, M68K_FEATURE_WORD_INDEX); 158 m68k_set_feature(env, M68K_FEATURE_BRAL); 159 m68k_set_feature(env, M68K_FEATURE_BCCL); 160 m68k_set_feature(env, M68K_FEATURE_BITFIELD); 161 m68k_set_feature(env, M68K_FEATURE_EXT_FULL); 162 m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX); 163 m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV); 164 m68k_set_feature(env, M68K_FEATURE_FPU); 165 m68k_set_feature(env, M68K_FEATURE_CAS); 166 m68k_set_feature(env, M68K_FEATURE_BKPT); 167 m68k_set_feature(env, M68K_FEATURE_RTD); 168 m68k_set_feature(env, M68K_FEATURE_CHK2); 169 } 170 171 static void m5208_cpu_initfn(Object *obj) 172 { 173 M68kCPU *cpu = M68K_CPU(obj); 174 CPUM68KState *env = &cpu->env; 175 176 m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); 177 m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC); 178 m68k_set_feature(env, M68K_FEATURE_BRAL); 179 m68k_set_feature(env, M68K_FEATURE_CF_EMAC); 180 m68k_set_feature(env, M68K_FEATURE_USP); 181 } 182 183 static void cfv4e_cpu_initfn(Object *obj) 184 { 185 M68kCPU *cpu = M68K_CPU(obj); 186 CPUM68KState *env = &cpu->env; 187 188 m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); 189 m68k_set_feature(env, M68K_FEATURE_CF_ISA_B); 190 m68k_set_feature(env, M68K_FEATURE_BRAL); 191 m68k_set_feature(env, M68K_FEATURE_CF_FPU); 192 m68k_set_feature(env, M68K_FEATURE_CF_EMAC); 193 m68k_set_feature(env, M68K_FEATURE_USP); 194 } 195 196 static void any_cpu_initfn(Object *obj) 197 { 198 M68kCPU *cpu = M68K_CPU(obj); 199 CPUM68KState *env = &cpu->env; 200 201 m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); 202 m68k_set_feature(env, M68K_FEATURE_CF_ISA_B); 203 m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC); 204 m68k_set_feature(env, M68K_FEATURE_BRAL); 205 m68k_set_feature(env, M68K_FEATURE_CF_FPU); 206 /* MAC and EMAC are mututally exclusive, so pick EMAC. 207 It's mostly backwards compatible. */ 208 m68k_set_feature(env, M68K_FEATURE_CF_EMAC); 209 m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B); 210 m68k_set_feature(env, M68K_FEATURE_USP); 211 m68k_set_feature(env, M68K_FEATURE_EXT_FULL); 212 m68k_set_feature(env, M68K_FEATURE_WORD_INDEX); 213 } 214 215 static void m68k_cpu_realizefn(DeviceState *dev, Error **errp) 216 { 217 CPUState *cs = CPU(dev); 218 M68kCPU *cpu = M68K_CPU(dev); 219 M68kCPUClass *mcc = M68K_CPU_GET_CLASS(dev); 220 Error *local_err = NULL; 221 222 register_m68k_insns(&cpu->env); 223 224 cpu_exec_realizefn(cs, &local_err); 225 if (local_err != NULL) { 226 error_propagate(errp, local_err); 227 return; 228 } 229 230 m68k_cpu_init_gdb(cpu); 231 232 cpu_reset(cs); 233 qemu_init_vcpu(cs); 234 235 mcc->parent_realize(dev, errp); 236 } 237 238 static void m68k_cpu_initfn(Object *obj) 239 { 240 CPUState *cs = CPU(obj); 241 M68kCPU *cpu = M68K_CPU(obj); 242 CPUM68KState *env = &cpu->env; 243 244 cs->env_ptr = env; 245 } 246 247 static const VMStateDescription vmstate_m68k_cpu = { 248 .name = "cpu", 249 .unmigratable = 1, 250 }; 251 252 static void m68k_cpu_class_init(ObjectClass *c, void *data) 253 { 254 M68kCPUClass *mcc = M68K_CPU_CLASS(c); 255 CPUClass *cc = CPU_CLASS(c); 256 DeviceClass *dc = DEVICE_CLASS(c); 257 258 mcc->parent_realize = dc->realize; 259 dc->realize = m68k_cpu_realizefn; 260 261 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 #ifdef CONFIG_USER_ONLY 273 cc->handle_mmu_fault = m68k_cpu_handle_mmu_fault; 274 #else 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) 315