qemu/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
  28
  29 static void superh_cpu_set_pc(CPUState *cs, vaddr value)
  30 {
  31     SuperHCPU *cpu = SUPERH_CPU(cs);
  32
  33     cpu->env.pc = value;
  34 }
  35
  36 static void superh_cpu_synchronize_from_tb(CPUState *cs, TranslationBlock *tb)
  37 {
  38     SuperHCPU *cpu = SUPERH_CPU(cs);
  39
  40     cpu->env.pc = tb->pc;
  41     cpu->env.flags = tb->flags;
  42 }
  43
  44 static bool superh_cpu_has_work(CPUState *cs)
  45 {
  46     return cs->interrupt_request & CPU_INTERRUPT_HARD;
  47 }
  48
  49 /* CPUClass::reset() */
  50 static void superh_cpu_reset(CPUState *s)
  51 {
  52     SuperHCPU *cpu = SUPERH_CPU(s);
  53     SuperHCPUClass *scc = SUPERH_CPU_GET_CLASS(cpu);
  54     CPUSH4State *env = &cpu->env;
  55
  56     scc->parent_reset(s);
  57
  58     memset(env, 0, offsetof(CPUSH4State, id));
  59     tlb_flush(s, 1);
  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 }
  74
  75 static void superh_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
  76 {
  77     info->mach = bfd_mach_sh4;
  78     info->print_insn = print_insn_sh;
  79 }
  80
  81 typedef struct SuperHCPUListState {
  82     fprintf_function cpu_fprintf;
  83     FILE *file;
  84 } SuperHCPUListState;
  85
  86 /* Sort alphabetically by type name. */
  87 static gint superh_cpu_list_compare(gconstpointer a, gconstpointer b)
  88 {
  89     ObjectClass *class_a = (ObjectClass *)a;
  90     ObjectClass *class_b = (ObjectClass *)b;
  91     const char *name_a, *name_b;
  92
  93     name_a = object_class_get_name(class_a);
  94     name_b = object_class_get_name(class_b);
  95     return strcmp(name_a, name_b);
  96 }
  97
  98 static void superh_cpu_list_entry(gpointer data, gpointer user_data)
  99 {
 100     ObjectClass *oc = data;
 101     SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);
 102     SuperHCPUListState *s = user_data;
 103
 104     (*s->cpu_fprintf)(s->file, "%s\n",
 105                       scc->name);
 106 }
 107
 108 void sh4_cpu_list(FILE *f, fprintf_function cpu_fprintf)
 109 {
 110     SuperHCPUListState s = {
 111         .cpu_fprintf = cpu_fprintf,
 112         .file = f,
 113     };
 114     GSList *list;
 115
 116     list = object_class_get_list(TYPE_SUPERH_CPU, false);
 117     list = g_slist_sort(list, superh_cpu_list_compare);
 118     g_slist_foreach(list, superh_cpu_list_entry, &s);
 119     g_slist_free(list);
 120 }
 121
 122 static gint superh_cpu_name_compare(gconstpointer a, gconstpointer b)
 123 {
 124     const SuperHCPUClass *scc = SUPERH_CPU_CLASS(a);
 125     const char *name = b;
 126
 127     return strcasecmp(scc->name, name);
 128 }
 129
 130 static ObjectClass *superh_cpu_class_by_name(const char *cpu_model)
 131 {
 132     ObjectClass *oc;
 133     GSList *list, *item;
 134
 135     if (cpu_model == NULL) {
 136         return NULL;
 137     }
 138     if (strcasecmp(cpu_model, "any") == 0) {
 139         return object_class_by_name(TYPE_SH7750R_CPU);
 140     }
 141
 142     oc = object_class_by_name(cpu_model);
 143     if (oc != NULL && object_class_dynamic_cast(oc, TYPE_SUPERH_CPU) != NULL
 144         && !object_class_is_abstract(oc)) {
 145         return oc;
 146     }
 147
 148     oc = NULL;
 149     list = object_class_get_list(TYPE_SUPERH_CPU, false);
 150     item = g_slist_find_custom(list, cpu_model, superh_cpu_name_compare);
 151     if (item != NULL) {
 152         oc = item->data;
 153     }
 154     g_slist_free(list);
 155     return oc;
 156 }
 157
 158 SuperHCPU *cpu_sh4_init(const char *cpu_model)
 159 {
 160     return SUPERH_CPU(cpu_generic_init(TYPE_SUPERH_CPU, cpu_model));
 161 }
 162
 163 static void sh7750r_cpu_initfn(Object *obj)
 164 {
 165     SuperHCPU *cpu = SUPERH_CPU(obj);
 166     CPUSH4State *env = &cpu->env;
 167
 168     env->id = SH_CPU_SH7750R;
 169     env->features = SH_FEATURE_BCR3_AND_BCR4;
 170 }
 171
 172 static void sh7750r_class_init(ObjectClass *oc, void *data)
 173 {
 174     SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);
 175
 176     scc->name = "SH7750R";
 177     scc->pvr = 0x00050000;
 178     scc->prr = 0x00000100;
 179     scc->cvr = 0x00110000;
 180 }
 181
 182 static const TypeInfo sh7750r_type_info = {
 183     .name = TYPE_SH7750R_CPU,
 184     .parent = TYPE_SUPERH_CPU,
 185     .class_init = sh7750r_class_init,
 186     .instance_init = sh7750r_cpu_initfn,
 187 };
 188
 189 static void sh7751r_cpu_initfn(Object *obj)
 190 {
 191     SuperHCPU *cpu = SUPERH_CPU(obj);
 192     CPUSH4State *env = &cpu->env;
 193
 194     env->id = SH_CPU_SH7751R;
 195     env->features = SH_FEATURE_BCR3_AND_BCR4;
 196 }
 197
 198 static void sh7751r_class_init(ObjectClass *oc, void *data)
 199 {
 200     SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);
 201
 202     scc->name = "SH7751R";
 203     scc->pvr = 0x04050005;
 204     scc->prr = 0x00000113;
 205     scc->cvr = 0x00110000; /* Neutered caches, should be 0x20480000 */
 206 }
 207
 208 static const TypeInfo sh7751r_type_info = {
 209     .name = TYPE_SH7751R_CPU,
 210     .parent = TYPE_SUPERH_CPU,
 211     .class_init = sh7751r_class_init,
 212     .instance_init = sh7751r_cpu_initfn,
 213 };
 214
 215 static void sh7785_cpu_initfn(Object *obj)
 216 {
 217     SuperHCPU *cpu = SUPERH_CPU(obj);
 218     CPUSH4State *env = &cpu->env;
 219
 220     env->id = SH_CPU_SH7785;
 221     env->features = SH_FEATURE_SH4A;
 222 }
 223
 224 static void sh7785_class_init(ObjectClass *oc, void *data)
 225 {
 226     SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);
 227
 228     scc->name = "SH7785";
 229     scc->pvr = 0x10300700;
 230     scc->prr = 0x00000200;
 231     scc->cvr = 0x71440211;
 232 }
 233
 234 static const TypeInfo sh7785_type_info = {
 235     .name = TYPE_SH7785_CPU,
 236     .parent = TYPE_SUPERH_CPU,
 237     .class_init = sh7785_class_init,
 238     .instance_init = sh7785_cpu_initfn,
 239 };
 240
 241 static void superh_cpu_realizefn(DeviceState *dev, Error **errp)
 242 {
 243     CPUState *cs = CPU(dev);
 244     SuperHCPUClass *scc = SUPERH_CPU_GET_CLASS(dev);
 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     cpu_exec_init(cs, &error_abort);
 260
 261     env->movcal_backup_tail = &(env->movcal_backup);
 262
 263     if (tcg_enabled()) {
 264         sh4_translate_init();
 265     }
 266 }
 267
 268 static const VMStateDescription vmstate_sh_cpu = {
 269     .name = "cpu",
 270     .unmigratable = 1,
 271 };
 272
 273 static void superh_cpu_class_init(ObjectClass *oc, void *data)
 274 {
 275     DeviceClass *dc = DEVICE_CLASS(oc);
 276     CPUClass *cc = CPU_CLASS(oc);
 277     SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);
 278
 279     scc->parent_realize = dc->realize;
 280     dc->realize = superh_cpu_realizefn;
 281
 282     scc->parent_reset = cc->reset;
 283     cc->reset = superh_cpu_reset;
 284
 285     cc->class_by_name = superh_cpu_class_by_name;
 286     cc->has_work = superh_cpu_has_work;
 287     cc->do_interrupt = superh_cpu_do_interrupt;
 288     cc->cpu_exec_interrupt = superh_cpu_exec_interrupt;
 289     cc->dump_state = superh_cpu_dump_state;
 290     cc->set_pc = superh_cpu_set_pc;
 291     cc->synchronize_from_tb = superh_cpu_synchronize_from_tb;
 292     cc->gdb_read_register = superh_cpu_gdb_read_register;
 293     cc->gdb_write_register = superh_cpu_gdb_write_register;
 294 #ifdef CONFIG_USER_ONLY
 295     cc->handle_mmu_fault = superh_cpu_handle_mmu_fault;
 296 #else
 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      * Reason: superh_cpu_initfn() calls cpu_exec_init(), which saves
 307      * the object in cpus -> dangling pointer after final
 308      * object_unref().
 309      */
 310     dc->cannot_destroy_with_object_finalize_yet = true;
 311 }
 312
 313 static const TypeInfo superh_cpu_type_info = {
 314     .name = TYPE_SUPERH_CPU,
 315     .parent = TYPE_CPU,
 316     .instance_size = sizeof(SuperHCPU),
 317     .instance_init = superh_cpu_initfn,
 318     .abstract = true,
 319     .class_size = sizeof(SuperHCPUClass),
 320     .class_init = superh_cpu_class_init,
 321 };
 322
 323 static void superh_cpu_register_types(void)
 324 {
 325     type_register_static(&superh_cpu_type_info);
 326     type_register_static(&sh7750r_type_info);
 327     type_register_static(&sh7751r_type_info);
 328     type_register_static(&sh7785_type_info);
 329 }
 330
 331 type_init(superh_cpu_register_types)