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 static void m68020_cpu_initfn(Object *obj) 118 { 119 M68kCPU *cpu = M68K_CPU(obj); 120 CPUM68KState *env = &cpu->env; 121 122 m68k_set_feature(env, M68K_FEATURE_M68000); 123 m68k_set_feature(env, M68K_FEATURE_USP); 124 m68k_set_feature(env, M68K_FEATURE_WORD_INDEX); 125 m68k_set_feature(env, M68K_FEATURE_QUAD_MULDIV); 126 m68k_set_feature(env, M68K_FEATURE_BRAL); 127 m68k_set_feature(env, M68K_FEATURE_BCCL); 128 m68k_set_feature(env, M68K_FEATURE_BITFIELD); 129 m68k_set_feature(env, M68K_FEATURE_EXT_FULL); 130 m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX); 131 m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV); 132 m68k_set_feature(env, M68K_FEATURE_FPU); 133 m68k_set_feature(env, M68K_FEATURE_CAS); 134 m68k_set_feature(env, M68K_FEATURE_BKPT); 135 m68k_set_feature(env, M68K_FEATURE_RTD); 136 m68k_set_feature(env, M68K_FEATURE_CHK2); 137 m68k_set_feature(env, M68K_FEATURE_MOVEP); 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 /* 207 * MAC and EMAC are mututally exclusive, so pick EMAC. 208 * It's mostly backwards compatible. 209 */ 210 m68k_set_feature(env, M68K_FEATURE_CF_EMAC); 211 m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B); 212 m68k_set_feature(env, M68K_FEATURE_USP); 213 m68k_set_feature(env, M68K_FEATURE_EXT_FULL); 214 m68k_set_feature(env, M68K_FEATURE_WORD_INDEX); 215 } 216 217 static void m68k_cpu_realizefn(DeviceState *dev, Error **errp) 218 { 219 CPUState *cs = CPU(dev); 220 M68kCPU *cpu = M68K_CPU(dev); 221 M68kCPUClass *mcc = M68K_CPU_GET_CLASS(dev); 222 Error *local_err = NULL; 223 224 register_m68k_insns(&cpu->env); 225 226 cpu_exec_realizefn(cs, &local_err); 227 if (local_err != NULL) { 228 error_propagate(errp, local_err); 229 return; 230 } 231 232 m68k_cpu_init_gdb(cpu); 233 234 cpu_reset(cs); 235 qemu_init_vcpu(cs); 236 237 mcc->parent_realize(dev, errp); 238 } 239 240 static void m68k_cpu_initfn(Object *obj) 241 { 242 M68kCPU *cpu = M68K_CPU(obj); 243 244 cpu_set_cpustate_pointers(cpu); 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 device_class_set_parent_realize(dc, m68k_cpu_realizefn, 259 &mcc->parent_realize); 260 mcc->parent_reset = cc->reset; 261 cc->reset = m68k_cpu_reset; 262 263 cc->class_by_name = m68k_cpu_class_by_name; 264 cc->has_work = m68k_cpu_has_work; 265 cc->do_interrupt = m68k_cpu_do_interrupt; 266 cc->cpu_exec_interrupt = m68k_cpu_exec_interrupt; 267 cc->dump_state = m68k_cpu_dump_state; 268 cc->set_pc = m68k_cpu_set_pc; 269 cc->gdb_read_register = m68k_cpu_gdb_read_register; 270 cc->gdb_write_register = m68k_cpu_gdb_write_register; 271 cc->tlb_fill = m68k_cpu_tlb_fill; 272 #if defined(CONFIG_SOFTMMU) 273 cc->do_transaction_failed = m68k_cpu_transaction_failed; 274 cc->get_phys_page_debug = m68k_cpu_get_phys_page_debug; 275 #endif 276 cc->disas_set_info = m68k_cpu_disas_set_info; 277 cc->tcg_initialize = m68k_tcg_init; 278 279 cc->gdb_num_core_regs = 18; 280 cc->gdb_core_xml_file = "cf-core.xml"; 281 282 dc->vmsd = &vmstate_m68k_cpu; 283 } 284 285 #define DEFINE_M68K_CPU_TYPE(cpu_model, initfn) \ 286 { \ 287 .name = M68K_CPU_TYPE_NAME(cpu_model), \ 288 .instance_init = initfn, \ 289 .parent = TYPE_M68K_CPU, \ 290 } 291 292 static const TypeInfo m68k_cpus_type_infos[] = { 293 { /* base class should be registered first */ 294 .name = TYPE_M68K_CPU, 295 .parent = TYPE_CPU, 296 .instance_size = sizeof(M68kCPU), 297 .instance_init = m68k_cpu_initfn, 298 .abstract = true, 299 .class_size = sizeof(M68kCPUClass), 300 .class_init = m68k_cpu_class_init, 301 }, 302 DEFINE_M68K_CPU_TYPE("m68000", m68000_cpu_initfn), 303 DEFINE_M68K_CPU_TYPE("m68020", m68020_cpu_initfn), 304 DEFINE_M68K_CPU_TYPE("m68030", m68030_cpu_initfn), 305 DEFINE_M68K_CPU_TYPE("m68040", m68040_cpu_initfn), 306 DEFINE_M68K_CPU_TYPE("m68060", m68060_cpu_initfn), 307 DEFINE_M68K_CPU_TYPE("m5206", m5206_cpu_initfn), 308 DEFINE_M68K_CPU_TYPE("m5208", m5208_cpu_initfn), 309 DEFINE_M68K_CPU_TYPE("cfv4e", cfv4e_cpu_initfn), 310 DEFINE_M68K_CPU_TYPE("any", any_cpu_initfn), 311 }; 312 313 DEFINE_TYPES(m68k_cpus_type_infos) 314