1 /* 2 * QEMU SuperH CPU 3 * 4 * Copyright (c) 2005 Samuel Tardieu 5 * Copyright (c) 2012 SUSE LINUX Products GmbH 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with this library; if not, see 19 * <http://www.gnu.org/licenses/lgpl-2.1.html> 20 */ 21 22 #include "qemu/osdep.h" 23 #include "qapi/error.h" 24 #include "cpu.h" 25 #include "qemu-common.h" 26 #include "migration/vmstate.h" 27 #include "exec/exec-all.h" 28 29 30 static void superh_cpu_set_pc(CPUState *cs, vaddr value) 31 { 32 SuperHCPU *cpu = SUPERH_CPU(cs); 33 34 cpu->env.pc = value; 35 } 36 37 static void superh_cpu_synchronize_from_tb(CPUState *cs, TranslationBlock *tb) 38 { 39 SuperHCPU *cpu = SUPERH_CPU(cs); 40 41 cpu->env.pc = tb->pc; 42 cpu->env.flags = tb->flags & TB_FLAG_ENVFLAGS_MASK; 43 } 44 45 static bool superh_cpu_has_work(CPUState *cs) 46 { 47 return cs->interrupt_request & CPU_INTERRUPT_HARD; 48 } 49 50 /* CPUClass::reset() */ 51 static void superh_cpu_reset(CPUState *s) 52 { 53 SuperHCPU *cpu = SUPERH_CPU(s); 54 SuperHCPUClass *scc = SUPERH_CPU_GET_CLASS(cpu); 55 CPUSH4State *env = &cpu->env; 56 57 scc->parent_reset(s); 58 59 memset(env, 0, offsetof(CPUSH4State, end_reset_fields)); 60 61 env->pc = 0xA0000000; 62 #if defined(CONFIG_USER_ONLY) 63 env->fpscr = FPSCR_PR; /* value for userspace according to the kernel */ 64 set_float_rounding_mode(float_round_nearest_even, &env->fp_status); /* ?! */ 65 #else 66 env->sr = (1u << SR_MD) | (1u << SR_RB) | (1u << SR_BL) | 67 (1u << SR_I3) | (1u << SR_I2) | (1u << SR_I1) | (1u << SR_I0); 68 env->fpscr = FPSCR_DN | FPSCR_RM_ZERO; /* CPU reset value according to SH4 manual */ 69 set_float_rounding_mode(float_round_to_zero, &env->fp_status); 70 set_flush_to_zero(1, &env->fp_status); 71 #endif 72 set_default_nan_mode(1, &env->fp_status); 73 set_snan_bit_is_one(1, &env->fp_status); 74 } 75 76 static void superh_cpu_disas_set_info(CPUState *cpu, disassemble_info *info) 77 { 78 info->mach = bfd_mach_sh4; 79 info->print_insn = print_insn_sh; 80 } 81 82 typedef struct SuperHCPUListState { 83 fprintf_function cpu_fprintf; 84 FILE *file; 85 } SuperHCPUListState; 86 87 /* Sort alphabetically by type name. */ 88 static gint superh_cpu_list_compare(gconstpointer a, gconstpointer b) 89 { 90 ObjectClass *class_a = (ObjectClass *)a; 91 ObjectClass *class_b = (ObjectClass *)b; 92 const char *name_a, *name_b; 93 94 name_a = object_class_get_name(class_a); 95 name_b = object_class_get_name(class_b); 96 return strcmp(name_a, name_b); 97 } 98 99 static void superh_cpu_list_entry(gpointer data, gpointer user_data) 100 { 101 ObjectClass *oc = data; 102 SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc); 103 SuperHCPUListState *s = user_data; 104 105 (*s->cpu_fprintf)(s->file, "%s\n", 106 scc->name); 107 } 108 109 void sh4_cpu_list(FILE *f, fprintf_function cpu_fprintf) 110 { 111 SuperHCPUListState s = { 112 .cpu_fprintf = cpu_fprintf, 113 .file = f, 114 }; 115 GSList *list; 116 117 list = object_class_get_list(TYPE_SUPERH_CPU, false); 118 list = g_slist_sort(list, superh_cpu_list_compare); 119 g_slist_foreach(list, superh_cpu_list_entry, &s); 120 g_slist_free(list); 121 } 122 123 static gint superh_cpu_name_compare(gconstpointer a, gconstpointer b) 124 { 125 const SuperHCPUClass *scc = SUPERH_CPU_CLASS(a); 126 const char *name = b; 127 128 return strcasecmp(scc->name, name); 129 } 130 131 static ObjectClass *superh_cpu_class_by_name(const char *cpu_model) 132 { 133 ObjectClass *oc; 134 GSList *list, *item; 135 136 if (strcasecmp(cpu_model, "any") == 0) { 137 return object_class_by_name(TYPE_SH7750R_CPU); 138 } 139 140 oc = object_class_by_name(cpu_model); 141 if (oc != NULL && object_class_dynamic_cast(oc, TYPE_SUPERH_CPU) != NULL 142 && !object_class_is_abstract(oc)) { 143 return oc; 144 } 145 146 oc = NULL; 147 list = object_class_get_list(TYPE_SUPERH_CPU, false); 148 item = g_slist_find_custom(list, cpu_model, superh_cpu_name_compare); 149 if (item != NULL) { 150 oc = item->data; 151 } 152 g_slist_free(list); 153 return oc; 154 } 155 156 static void sh7750r_cpu_initfn(Object *obj) 157 { 158 SuperHCPU *cpu = SUPERH_CPU(obj); 159 CPUSH4State *env = &cpu->env; 160 161 env->id = SH_CPU_SH7750R; 162 env->features = SH_FEATURE_BCR3_AND_BCR4; 163 } 164 165 static void sh7750r_class_init(ObjectClass *oc, void *data) 166 { 167 SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc); 168 169 scc->name = "SH7750R"; 170 scc->pvr = 0x00050000; 171 scc->prr = 0x00000100; 172 scc->cvr = 0x00110000; 173 } 174 175 static const TypeInfo sh7750r_type_info = { 176 .name = TYPE_SH7750R_CPU, 177 .parent = TYPE_SUPERH_CPU, 178 .class_init = sh7750r_class_init, 179 .instance_init = sh7750r_cpu_initfn, 180 }; 181 182 static void sh7751r_cpu_initfn(Object *obj) 183 { 184 SuperHCPU *cpu = SUPERH_CPU(obj); 185 CPUSH4State *env = &cpu->env; 186 187 env->id = SH_CPU_SH7751R; 188 env->features = SH_FEATURE_BCR3_AND_BCR4; 189 } 190 191 static void sh7751r_class_init(ObjectClass *oc, void *data) 192 { 193 SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc); 194 195 scc->name = "SH7751R"; 196 scc->pvr = 0x04050005; 197 scc->prr = 0x00000113; 198 scc->cvr = 0x00110000; /* Neutered caches, should be 0x20480000 */ 199 } 200 201 static const TypeInfo sh7751r_type_info = { 202 .name = TYPE_SH7751R_CPU, 203 .parent = TYPE_SUPERH_CPU, 204 .class_init = sh7751r_class_init, 205 .instance_init = sh7751r_cpu_initfn, 206 }; 207 208 static void sh7785_cpu_initfn(Object *obj) 209 { 210 SuperHCPU *cpu = SUPERH_CPU(obj); 211 CPUSH4State *env = &cpu->env; 212 213 env->id = SH_CPU_SH7785; 214 env->features = SH_FEATURE_SH4A; 215 } 216 217 static void sh7785_class_init(ObjectClass *oc, void *data) 218 { 219 SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc); 220 221 scc->name = "SH7785"; 222 scc->pvr = 0x10300700; 223 scc->prr = 0x00000200; 224 scc->cvr = 0x71440211; 225 } 226 227 static const TypeInfo sh7785_type_info = { 228 .name = TYPE_SH7785_CPU, 229 .parent = TYPE_SUPERH_CPU, 230 .class_init = sh7785_class_init, 231 .instance_init = sh7785_cpu_initfn, 232 }; 233 234 static void superh_cpu_realizefn(DeviceState *dev, Error **errp) 235 { 236 CPUState *cs = CPU(dev); 237 SuperHCPUClass *scc = SUPERH_CPU_GET_CLASS(dev); 238 Error *local_err = NULL; 239 240 cpu_exec_realizefn(cs, &local_err); 241 if (local_err != NULL) { 242 error_propagate(errp, local_err); 243 return; 244 } 245 246 cpu_reset(cs); 247 qemu_init_vcpu(cs); 248 249 scc->parent_realize(dev, errp); 250 } 251 252 static void superh_cpu_initfn(Object *obj) 253 { 254 CPUState *cs = CPU(obj); 255 SuperHCPU *cpu = SUPERH_CPU(obj); 256 CPUSH4State *env = &cpu->env; 257 258 cs->env_ptr = env; 259 260 env->movcal_backup_tail = &(env->movcal_backup); 261 262 if (tcg_enabled()) { 263 sh4_translate_init(); 264 } 265 } 266 267 static const VMStateDescription vmstate_sh_cpu = { 268 .name = "cpu", 269 .unmigratable = 1, 270 }; 271 272 static void superh_cpu_class_init(ObjectClass *oc, void *data) 273 { 274 DeviceClass *dc = DEVICE_CLASS(oc); 275 CPUClass *cc = CPU_CLASS(oc); 276 SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc); 277 278 scc->parent_realize = dc->realize; 279 dc->realize = superh_cpu_realizefn; 280 281 scc->parent_reset = cc->reset; 282 cc->reset = superh_cpu_reset; 283 284 cc->class_by_name = superh_cpu_class_by_name; 285 cc->has_work = superh_cpu_has_work; 286 cc->do_interrupt = superh_cpu_do_interrupt; 287 cc->cpu_exec_interrupt = superh_cpu_exec_interrupt; 288 cc->dump_state = superh_cpu_dump_state; 289 cc->set_pc = superh_cpu_set_pc; 290 cc->synchronize_from_tb = superh_cpu_synchronize_from_tb; 291 cc->gdb_read_register = superh_cpu_gdb_read_register; 292 cc->gdb_write_register = superh_cpu_gdb_write_register; 293 #ifdef CONFIG_USER_ONLY 294 cc->handle_mmu_fault = superh_cpu_handle_mmu_fault; 295 #else 296 cc->do_unaligned_access = superh_cpu_do_unaligned_access; 297 cc->get_phys_page_debug = superh_cpu_get_phys_page_debug; 298 #endif 299 cc->disas_set_info = superh_cpu_disas_set_info; 300 301 cc->gdb_num_core_regs = 59; 302 303 dc->vmsd = &vmstate_sh_cpu; 304 } 305 306 static const TypeInfo superh_cpu_type_info = { 307 .name = TYPE_SUPERH_CPU, 308 .parent = TYPE_CPU, 309 .instance_size = sizeof(SuperHCPU), 310 .instance_init = superh_cpu_initfn, 311 .abstract = true, 312 .class_size = sizeof(SuperHCPUClass), 313 .class_init = superh_cpu_class_init, 314 }; 315 316 static void superh_cpu_register_types(void) 317 { 318 type_register_static(&superh_cpu_type_info); 319 type_register_static(&sh7750r_type_info); 320 type_register_static(&sh7751r_type_info); 321 type_register_static(&sh7785_type_info); 322 } 323 324 type_init(superh_cpu_register_types) 325