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 "fpu/softfloat.h" 27 28 static void m68k_cpu_set_pc(CPUState *cs, vaddr value) 29 { 30 M68kCPU *cpu = M68K_CPU(cs); 31 32 cpu->env.pc = value; 33 } 34 35 static bool m68k_cpu_has_work(CPUState *cs) 36 { 37 return cs->interrupt_request & CPU_INTERRUPT_HARD; 38 } 39 40 static void m68k_set_feature(CPUM68KState *env, int feature) 41 { 42 env->features |= (1u << feature); 43 } 44 45 /* CPUClass::reset() */ 46 static void m68k_cpu_reset(CPUState *s) 47 { 48 M68kCPU *cpu = M68K_CPU(s); 49 M68kCPUClass *mcc = M68K_CPU_GET_CLASS(cpu); 50 CPUM68KState *env = &cpu->env; 51 floatx80 nan = floatx80_default_nan(NULL); 52 int i; 53 54 mcc->parent_reset(s); 55 56 memset(env, 0, offsetof(CPUM68KState, end_reset_fields)); 57 #ifdef CONFIG_SOFTMMU 58 cpu_m68k_set_sr(env, SR_S | SR_I); 59 #else 60 cpu_m68k_set_sr(env, 0); 61 #endif 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 /* TODO: We should set PC from the interrupt vector. */ 69 env->pc = 0; 70 } 71 72 static void m68k_cpu_disas_set_info(CPUState *s, disassemble_info *info) 73 { 74 M68kCPU *cpu = M68K_CPU(s); 75 CPUM68KState *env = &cpu->env; 76 info->print_insn = print_insn_m68k; 77 if (m68k_feature(env, M68K_FEATURE_M68000)) { 78 info->mach = bfd_mach_m68040; 79 } 80 } 81 82 /* CPU models */ 83 84 static ObjectClass *m68k_cpu_class_by_name(const char *cpu_model) 85 { 86 ObjectClass *oc; 87 char *typename; 88 89 typename = g_strdup_printf(M68K_CPU_TYPE_NAME("%s"), cpu_model); 90 oc = object_class_by_name(typename); 91 g_free(typename); 92 if (oc != NULL && (object_class_dynamic_cast(oc, TYPE_M68K_CPU) == NULL || 93 object_class_is_abstract(oc))) { 94 return NULL; 95 } 96 return oc; 97 } 98 99 static void m5206_cpu_initfn(Object *obj) 100 { 101 M68kCPU *cpu = M68K_CPU(obj); 102 CPUM68KState *env = &cpu->env; 103 104 m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); 105 } 106 107 static void m68000_cpu_initfn(Object *obj) 108 { 109 M68kCPU *cpu = M68K_CPU(obj); 110 CPUM68KState *env = &cpu->env; 111 112 m68k_set_feature(env, M68K_FEATURE_M68000); 113 m68k_set_feature(env, M68K_FEATURE_USP); 114 m68k_set_feature(env, M68K_FEATURE_WORD_INDEX); 115 m68k_set_feature(env, M68K_FEATURE_MOVEP); 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 m68k_set_feature(env, M68K_FEATURE_MOVEP); 139 } 140 #define m68030_cpu_initfn m68020_cpu_initfn 141 142 static void m68040_cpu_initfn(Object *obj) 143 { 144 M68kCPU *cpu = M68K_CPU(obj); 145 CPUM68KState *env = &cpu->env; 146 147 m68020_cpu_initfn(obj); 148 m68k_set_feature(env, M68K_FEATURE_M68040); 149 } 150 151 static void m68060_cpu_initfn(Object *obj) 152 { 153 M68kCPU *cpu = M68K_CPU(obj); 154 CPUM68KState *env = &cpu->env; 155 156 m68k_set_feature(env, M68K_FEATURE_M68000); 157 m68k_set_feature(env, M68K_FEATURE_USP); 158 m68k_set_feature(env, M68K_FEATURE_WORD_INDEX); 159 m68k_set_feature(env, M68K_FEATURE_BRAL); 160 m68k_set_feature(env, M68K_FEATURE_BCCL); 161 m68k_set_feature(env, M68K_FEATURE_BITFIELD); 162 m68k_set_feature(env, M68K_FEATURE_EXT_FULL); 163 m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX); 164 m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV); 165 m68k_set_feature(env, M68K_FEATURE_FPU); 166 m68k_set_feature(env, M68K_FEATURE_CAS); 167 m68k_set_feature(env, M68K_FEATURE_BKPT); 168 m68k_set_feature(env, M68K_FEATURE_RTD); 169 m68k_set_feature(env, M68K_FEATURE_CHK2); 170 } 171 172 static void m5208_cpu_initfn(Object *obj) 173 { 174 M68kCPU *cpu = M68K_CPU(obj); 175 CPUM68KState *env = &cpu->env; 176 177 m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); 178 m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC); 179 m68k_set_feature(env, M68K_FEATURE_BRAL); 180 m68k_set_feature(env, M68K_FEATURE_CF_EMAC); 181 m68k_set_feature(env, M68K_FEATURE_USP); 182 } 183 184 static void cfv4e_cpu_initfn(Object *obj) 185 { 186 M68kCPU *cpu = M68K_CPU(obj); 187 CPUM68KState *env = &cpu->env; 188 189 m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); 190 m68k_set_feature(env, M68K_FEATURE_CF_ISA_B); 191 m68k_set_feature(env, M68K_FEATURE_BRAL); 192 m68k_set_feature(env, M68K_FEATURE_CF_FPU); 193 m68k_set_feature(env, M68K_FEATURE_CF_EMAC); 194 m68k_set_feature(env, M68K_FEATURE_USP); 195 } 196 197 static void any_cpu_initfn(Object *obj) 198 { 199 M68kCPU *cpu = M68K_CPU(obj); 200 CPUM68KState *env = &cpu->env; 201 202 m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); 203 m68k_set_feature(env, M68K_FEATURE_CF_ISA_B); 204 m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC); 205 m68k_set_feature(env, M68K_FEATURE_BRAL); 206 m68k_set_feature(env, M68K_FEATURE_CF_FPU); 207 /* MAC and EMAC are mututally exclusive, so pick EMAC. 208 It's mostly backwards compatible. */ 209 m68k_set_feature(env, M68K_FEATURE_CF_EMAC); 210 m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B); 211 m68k_set_feature(env, M68K_FEATURE_USP); 212 m68k_set_feature(env, M68K_FEATURE_EXT_FULL); 213 m68k_set_feature(env, M68K_FEATURE_WORD_INDEX); 214 } 215 216 static void m68k_cpu_realizefn(DeviceState *dev, Error **errp) 217 { 218 CPUState *cs = CPU(dev); 219 M68kCPU *cpu = M68K_CPU(dev); 220 M68kCPUClass *mcc = M68K_CPU_GET_CLASS(dev); 221 Error *local_err = NULL; 222 223 register_m68k_insns(&cpu->env); 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; 244 245 cs->env_ptr = env; 246 } 247 248 static const VMStateDescription vmstate_m68k_cpu = { 249 .name = "cpu", 250 .unmigratable = 1, 251 }; 252 253 static void m68k_cpu_class_init(ObjectClass *c, void *data) 254 { 255 M68kCPUClass *mcc = M68K_CPU_CLASS(c); 256 CPUClass *cc = CPU_CLASS(c); 257 DeviceClass *dc = DEVICE_CLASS(c); 258 259 device_class_set_parent_realize(dc, m68k_cpu_realizefn, 260 &mcc->parent_realize); 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 cc->handle_mmu_fault = m68k_cpu_handle_mmu_fault; 273 #if defined(CONFIG_SOFTMMU) 274 cc->do_unassigned_access = m68k_cpu_unassigned_access; 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