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 "cpu.h"
  23 #include "qemu-common.h"
  24 #include "migration/vmstate.h"
  25
  26
  27 static void superh_cpu_set_pc(CPUState *cs, vaddr value)
  28 {
  29     SuperHCPU *cpu = SUPERH_CPU(cs);
  30
  31     cpu->env.pc = value;
  32 }
  33
  34 static void superh_cpu_synchronize_from_tb(CPUState *cs, TranslationBlock *tb)
  35 {
  36     SuperHCPU *cpu = SUPERH_CPU(cs);
  37
  38     cpu->env.pc = tb->pc;
  39     cpu->env.flags = tb->flags;
  40 }
  41
  42 /* CPUClass::reset() */
  43 static void superh_cpu_reset(CPUState *s)
  44 {
  45     SuperHCPU *cpu = SUPERH_CPU(s);
  46     SuperHCPUClass *scc = SUPERH_CPU_GET_CLASS(cpu);
  47     CPUSH4State *env = &cpu->env;
  48
  49     scc->parent_reset(s);
  50
  51     memset(env, 0, offsetof(CPUSH4State, breakpoints));
  52     tlb_flush(env, 1);
  53
  54     env->pc = 0xA0000000;
  55 #if defined(CONFIG_USER_ONLY)
  56     env->fpscr = FPSCR_PR; /* value for userspace according to the kernel */
  57     set_float_rounding_mode(float_round_nearest_even, &env->fp_status); /* ?! */
  58 #else
  59     env->sr = SR_MD | SR_RB | SR_BL | SR_I3 | SR_I2 | SR_I1 | SR_I0;
  60     env->fpscr = FPSCR_DN | FPSCR_RM_ZERO; /* CPU reset value according to SH4 manual */
  61     set_float_rounding_mode(float_round_to_zero, &env->fp_status);
  62     set_flush_to_zero(1, &env->fp_status);
  63 #endif
  64     set_default_nan_mode(1, &env->fp_status);
  65 }
  66
  67 typedef struct SuperHCPUListState {
  68     fprintf_function cpu_fprintf;
  69     FILE *file;
  70 } SuperHCPUListState;
  71
  72 /* Sort alphabetically by type name. */
  73 static gint superh_cpu_list_compare(gconstpointer a, gconstpointer b)
  74 {
  75     ObjectClass *class_a = (ObjectClass *)a;
  76     ObjectClass *class_b = (ObjectClass *)b;
  77     const char *name_a, *name_b;
  78
  79     name_a = object_class_get_name(class_a);
  80     name_b = object_class_get_name(class_b);
  81     return strcmp(name_a, name_b);
  82 }
  83
  84 static void superh_cpu_list_entry(gpointer data, gpointer user_data)
  85 {
  86     ObjectClass *oc = data;
  87     SuperHCPUClass *scc = SUPERH_CPU_CLASS(oc);
  88     SuperHCPUListState *s = user_data;
  89
  90     (*s->cpu_fprintf)(s->file, "%s\n",
  91                       scc->name);
  92 }
  93
  94 void sh4_cpu_list(FILE *f, fprintf_function cpu_fprintf)
  95 {
  96     SuperHCPUListState s = {
  97         .cpu_fprintf = cpu_fprintf,
  98         .file = f,
  99     };
 100     GSList *list;
 101
 102     list = object_class_get_list(TYPE_SUPERH_CPU, false);
 103     list = g_slist_sort(list, superh_cpu_list_compare);
 104     g_slist_foreach(list, superh_cpu_list_entry, &s);
 105     g_slist_free(list);
 106 }
 107
 108 static gint superh_cpu_name_compare(gconstpointer a, gconstpointer b)
 109 {
 110     const SuperHCPUClass *scc = SUPERH_CPU_CLASS(a);
 111     const char *name = b;
 112
 113     return strcasecmp(scc->name, name);
 114 }
 115
 116 static ObjectClass *superh_cpu_class_by_name(const char *cpu_model)
 117 {
 118     ObjectClass *oc;
 119     GSList *list, *item;
 120
 121     if (cpu_model == NULL) {
 122         return NULL;
 123     }
 124     if (strcasecmp(cpu_model, "any") == 0) {
 125         return object_class_by_name(TYPE_SH7750R_CPU);
 126     }
 127
 128     oc = object_class_by_name(cpu_model);
 129     if (oc != NULL && object_class_dynamic_cast(oc, TYPE_SUPERH_CPU) != NULL
 130         && !object_class_is_abstract(oc)) {
 131         return oc;
 132     }
 133
 134     oc = NULL;
 135     list = object_class_get_list(TYPE_SUPERH_CPU, false);
 136     item = g_slist_find_custom(list, cpu_model, superh_cpu_name_compare);
 137     if (item != NULL) {
 138         oc = item->data;
 139     }
 140     g_slist_free(list);
 141     return oc;
 142 }
 143
 144 SuperHCPU *cpu_sh4_init(const char *cpu_model)
 145 {
 146     SuperHCPU *cpu;
 147     CPUSH4State *env;
 148     ObjectClass *oc;
 149
 150     oc = superh_cpu_class_by_name(cpu_model);
 151     if (oc == NULL) {
 152         return NULL;
 153     }
 154     cpu = SUPERH_CPU(object_new(object_class_get_name(oc)));
 155     env = &cpu->env;
 156     env->cpu_model_str = cpu_model;
 157
 158     object_property_set_bool(OBJECT(cpu), true, "realized", NULL);
 159
 160     return cpu;
 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     SuperHCPU *cpu = SUPERH_CPU(dev);
 244     SuperHCPUClass *scc = SUPERH_CPU_GET_CLASS(dev);
 245
 246     cpu_reset(CPU(cpu));
 247
 248     scc->parent_realize(dev, errp);
 249 }
 250
 251 static void superh_cpu_initfn(Object *obj)
 252 {
 253     CPUState *cs = CPU(obj);
 254     SuperHCPU *cpu = SUPERH_CPU(obj);
 255     CPUSH4State *env = &cpu->env;
 256
 257     cs->env_ptr = env;
 258     cpu_exec_init(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->do_interrupt = superh_cpu_do_interrupt;
 286     cc->dump_state = superh_cpu_dump_state;
 287     cc->set_pc = superh_cpu_set_pc;
 288     cc->synchronize_from_tb = superh_cpu_synchronize_from_tb;
 289 #ifndef CONFIG_USER_ONLY
 290     cc->get_phys_page_debug = superh_cpu_get_phys_page_debug;
 291 #endif
 292     dc->vmsd = &vmstate_sh_cpu;
 293 }
 294
 295 static const TypeInfo superh_cpu_type_info = {
 296     .name = TYPE_SUPERH_CPU,
 297     .parent = TYPE_CPU,
 298     .instance_size = sizeof(SuperHCPU),
 299     .instance_init = superh_cpu_initfn,
 300     .abstract = true,
 301     .class_size = sizeof(SuperHCPUClass),
 302     .class_init = superh_cpu_class_init,
 303 };
 304
 305 static void superh_cpu_register_types(void)
 306 {
 307     type_register_static(&superh_cpu_type_info);
 308     type_register_static(&sh7750r_type_info);
 309     type_register_static(&sh7751r_type_info);
 310     type_register_static(&sh7785_type_info);
 311 }
 312
 313 type_init(superh_cpu_register_types)