target-sh4/cpu.c

   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;
  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, id));
  60     tlb_flush(s, 1);
  61
  62     env->pc = 0xA0000000;
  63 #if defined(CONFIG_USER_ONLY)
  64     env->fpscr = FPSCR_PR; /* value for userspace according to the kernel */
  65     set_float_rounding_mode(float_round_nearest_even, &env->fp_status); /* ?! */
  66 #else
  67     env->sr = (1u << SR_MD) | (1u << SR_RB) | (1u << SR_BL) |
  68               (1u << SR_I3) | (1u << SR_I2) | (1u << SR_I1) | (1u << SR_I0);
  69     env->fpscr = FPSCR_DN | FPSCR_RM_ZERO; /* CPU reset value according to SH4 manual */
  70     set_float_rounding_mode(float_round_to_zero, &env->fp_status);
  71     set_flush_to_zero(1, &env->fp_status);
  72 #endif
  73     set_default_nan_mode(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 (cpu_model == NULL) {
 137         return NULL;
 138     }
 139     if (strcasecmp(cpu_model, "any") == 0) {
 140         return object_class_by_name(TYPE_SH7750R_CPU);
 141     }
 142
 143     oc = object_class_by_name(cpu_model);
 144     if (oc != NULL && object_class_dynamic_cast(oc, TYPE_SUPERH_CPU) != NULL
 145         && !object_class_is_abstract(oc)) {
 146         return oc;
 147     }
 148
 149     oc = NULL;
 150     list = object_class_get_list(TYPE_SUPERH_CPU, false);
 151     item = g_slist_find_custom(list, cpu_model, superh_cpu_name_compare);
 152     if (item != NULL) {
 153         oc = item->data;
 154     }
 155     g_slist_free(list);
 156     return oc;
 157 }
 158
 159 SuperHCPU *cpu_sh4_init(const char *cpu_model)
 160 {
 161     return SUPERH_CPU(cpu_generic_init(TYPE_SUPERH_CPU, cpu_model));
 162 }
 163
 164 static void sh7750r_cpu_initfn(Object *obj)
 165 {
 166     SuperHCPU *cpu = SUPERH_CPU(obj);
 167     CPUSH4State *env = &cpu->env;
 168
 169     env->id = SH_CPU_SH7750R;
 170     env->features = SH_FEATURE_BCR3_AND_BCR4;
 171 }
 172
 173 static void sh7750r_class_init(ObjectClass *oc, void *data)
 174 {
 175     SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);
 176
 177     scc->name = "SH7750R";
 178     scc->pvr = 0x00050000;
 179     scc->prr = 0x00000100;
 180     scc->cvr = 0x00110000;
 181 }
 182
 183 static const TypeInfo sh7750r_type_info = {
 184     .name = TYPE_SH7750R_CPU,
 185     .parent = TYPE_SUPERH_CPU,
 186     .class_init = sh7750r_class_init,
 187     .instance_init = sh7750r_cpu_initfn,
 188 };
 189
 190 static void sh7751r_cpu_initfn(Object *obj)
 191 {
 192     SuperHCPU *cpu = SUPERH_CPU(obj);
 193     CPUSH4State *env = &cpu->env;
 194
 195     env->id = SH_CPU_SH7751R;
 196     env->features = SH_FEATURE_BCR3_AND_BCR4;
 197 }
 198
 199 static void sh7751r_class_init(ObjectClass *oc, void *data)
 200 {
 201     SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);
 202
 203     scc->name = "SH7751R";
 204     scc->pvr = 0x04050005;
 205     scc->prr = 0x00000113;
 206     scc->cvr = 0x00110000; /* Neutered caches, should be 0x20480000 */
 207 }
 208
 209 static const TypeInfo sh7751r_type_info = {
 210     .name = TYPE_SH7751R_CPU,
 211     .parent = TYPE_SUPERH_CPU,
 212     .class_init = sh7751r_class_init,
 213     .instance_init = sh7751r_cpu_initfn,
 214 };
 215
 216 static void sh7785_cpu_initfn(Object *obj)
 217 {
 218     SuperHCPU *cpu = SUPERH_CPU(obj);
 219     CPUSH4State *env = &cpu->env;
 220
 221     env->id = SH_CPU_SH7785;
 222     env->features = SH_FEATURE_SH4A;
 223 }
 224
 225 static void sh7785_class_init(ObjectClass *oc, void *data)
 226 {
 227     SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);
 228
 229     scc->name = "SH7785";
 230     scc->pvr = 0x10300700;
 231     scc->prr = 0x00000200;
 232     scc->cvr = 0x71440211;
 233 }
 234
 235 static const TypeInfo sh7785_type_info = {
 236     .name = TYPE_SH7785_CPU,
 237     .parent = TYPE_SUPERH_CPU,
 238     .class_init = sh7785_class_init,
 239     .instance_init = sh7785_cpu_initfn,
 240 };
 241
 242 static void superh_cpu_realizefn(DeviceState *dev, Error **errp)
 243 {
 244     CPUState *cs = CPU(dev);
 245     SuperHCPUClass *scc = SUPERH_CPU_GET_CLASS(dev);
 246
 247     cpu_reset(cs);
 248     qemu_init_vcpu(cs);
 249
 250     scc->parent_realize(dev, errp);
 251 }
 252
 253 static void superh_cpu_initfn(Object *obj)
 254 {
 255     CPUState *cs = CPU(obj);
 256     SuperHCPU *cpu = SUPERH_CPU(obj);
 257     CPUSH4State *env = &cpu->env;
 258
 259     cs->env_ptr = env;
 260     cpu_exec_init(cs, &error_abort);
 261
 262     env->movcal_backup_tail = &(env->movcal_backup);
 263
 264     if (tcg_enabled()) {
 265         sh4_translate_init();
 266     }
 267 }
 268
 269 static const VMStateDescription vmstate_sh_cpu = {
 270     .name = "cpu",
 271     .unmigratable = 1,
 272 };
 273
 274 static void superh_cpu_class_init(ObjectClass *oc, void *data)
 275 {
 276     DeviceClass *dc = DEVICE_CLASS(oc);
 277     CPUClass *cc = CPU_CLASS(oc);
 278     SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);
 279
 280     scc->parent_realize = dc->realize;
 281     dc->realize = superh_cpu_realizefn;
 282
 283     scc->parent_reset = cc->reset;
 284     cc->reset = superh_cpu_reset;
 285
 286     cc->class_by_name = superh_cpu_class_by_name;
 287     cc->has_work = superh_cpu_has_work;
 288     cc->do_interrupt = superh_cpu_do_interrupt;
 289     cc->cpu_exec_interrupt = superh_cpu_exec_interrupt;
 290     cc->dump_state = superh_cpu_dump_state;
 291     cc->set_pc = superh_cpu_set_pc;
 292     cc->synchronize_from_tb = superh_cpu_synchronize_from_tb;
 293     cc->gdb_read_register = superh_cpu_gdb_read_register;
 294     cc->gdb_write_register = superh_cpu_gdb_write_register;
 295 #ifdef CONFIG_USER_ONLY
 296     cc->handle_mmu_fault = superh_cpu_handle_mmu_fault;
 297 #else
 298     cc->get_phys_page_debug = superh_cpu_get_phys_page_debug;
 299 #endif
 300     cc->disas_set_info = superh_cpu_disas_set_info;
 301
 302     cc->gdb_num_core_regs = 59;
 303
 304     dc->vmsd = &vmstate_sh_cpu;
 305
 306     /*
 307      * Reason: superh_cpu_initfn() calls cpu_exec_init(), which saves
 308      * the object in cpus -> dangling pointer after final
 309      * object_unref().
 310      */
 311     dc->cannot_destroy_with_object_finalize_yet = true;
 312 }
 313
 314 static const TypeInfo superh_cpu_type_info = {
 315     .name = TYPE_SUPERH_CPU,
 316     .parent = TYPE_CPU,
 317     .instance_size = sizeof(SuperHCPU),
 318     .instance_init = superh_cpu_initfn,
 319     .abstract = true,
 320     .class_size = sizeof(SuperHCPUClass),
 321     .class_init = superh_cpu_class_init,
 322 };
 323
 324 static void superh_cpu_register_types(void)
 325 {
 326     type_register_static(&superh_cpu_type_info);
 327     type_register_static(&sh7750r_type_info);
 328     type_register_static(&sh7751r_type_info);
 329     type_register_static(&sh7785_type_info);
 330 }
 331
 332 type_init(superh_cpu_register_types)