target-cris/cpu.c

   1 /*
   2  * QEMU CRIS CPU
   3  *
   4  * Copyright (c) 2008 AXIS Communications AB
   5  * Written by Edgar E. Iglesias.
   6  *
   7  * Copyright (c) 2012 SUSE LINUX Products GmbH
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, see
  21  * <http://www.gnu.org/licenses/lgpl-2.1.html>
  22  */
  23
  24 #include "cpu.h"
  25 #include "qemu-common.h"
  26 #include "mmu.h"
  27
  28
  29 /* CPUClass::reset() */
  30 static void cris_cpu_reset(CPUState *s)
  31 {
  32     CRISCPU *cpu = CRIS_CPU(s);
  33     CRISCPUClass *ccc = CRIS_CPU_GET_CLASS(cpu);
  34     CPUCRISState *env = &cpu->env;
  35     uint32_t vr;
  36
  37     ccc->parent_reset(s);
  38
  39     vr = env->pregs[PR_VR];
  40     memset(env, 0, offsetof(CPUCRISState, breakpoints));
  41     env->pregs[PR_VR] = vr;
  42     tlb_flush(env, 1);
  43
  44 #if defined(CONFIG_USER_ONLY)
  45     /* start in user mode with interrupts enabled.  */
  46     env->pregs[PR_CCS] |= U_FLAG | I_FLAG | P_FLAG;
  47 #else
  48     cris_mmu_init(env);
  49     env->pregs[PR_CCS] = 0;
  50 #endif
  51 }
  52
  53 static ObjectClass *cris_cpu_class_by_name(const char *cpu_model)
  54 {
  55     ObjectClass *oc;
  56     char *typename;
  57
  58     if (cpu_model == NULL) {
  59         return NULL;
  60     }
  61
  62     typename = g_strdup_printf("%s-" TYPE_CRIS_CPU, cpu_model);
  63     oc = object_class_by_name(typename);
  64     g_free(typename);
  65     if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_CRIS_CPU) ||
  66                        object_class_is_abstract(oc))) {
  67         oc = NULL;
  68     }
  69     return oc;
  70 }
  71
  72 CRISCPU *cpu_cris_init(const char *cpu_model)
  73 {
  74     CRISCPU *cpu;
  75     ObjectClass *oc;
  76
  77     oc = cris_cpu_class_by_name(cpu_model);
  78     if (oc == NULL) {
  79         return NULL;
  80     }
  81     cpu = CRIS_CPU(object_new(object_class_get_name(oc)));
  82
  83     object_property_set_bool(OBJECT(cpu), true, "realized", NULL);
  84
  85     return cpu;
  86 }
  87
  88 /* Sort alphabetically by VR. */
  89 static gint cris_cpu_list_compare(gconstpointer a, gconstpointer b)
  90 {
  91     CRISCPUClass *ccc_a = CRIS_CPU_CLASS(a);
  92     CRISCPUClass *ccc_b = CRIS_CPU_CLASS(b);
  93
  94     /*  */
  95     if (ccc_a->vr > ccc_b->vr) {
  96         return 1;
  97     } else if (ccc_a->vr < ccc_b->vr) {
  98         return -1;
  99     } else {
 100         return 0;
 101     }
 102 }
 103
 104 static void cris_cpu_list_entry(gpointer data, gpointer user_data)
 105 {
 106     ObjectClass *oc = data;
 107     CPUListState *s = user_data;
 108     const char *typename = object_class_get_name(oc);
 109     char *name;
 110
 111     name = g_strndup(typename, strlen(typename) - strlen("-" TYPE_CRIS_CPU));
 112     (*s->cpu_fprintf)(s->file, "  %s\n", name);
 113     g_free(name);
 114 }
 115
 116 void cris_cpu_list(FILE *f, fprintf_function cpu_fprintf)
 117 {
 118     CPUListState s = {
 119         .file = f,
 120         .cpu_fprintf = cpu_fprintf,
 121     };
 122     GSList *list;
 123
 124     list = object_class_get_list(TYPE_CRIS_CPU, false);
 125     list = g_slist_sort(list, cris_cpu_list_compare);
 126     (*cpu_fprintf)(f, "Available CPUs:\n");
 127     g_slist_foreach(list, cris_cpu_list_entry, &s);
 128     g_slist_free(list);
 129 }
 130
 131 static void cris_cpu_realizefn(DeviceState *dev, Error **errp)
 132 {
 133     CRISCPU *cpu = CRIS_CPU(dev);
 134     CRISCPUClass *ccc = CRIS_CPU_GET_CLASS(dev);
 135
 136     cpu_reset(CPU(cpu));
 137
 138     ccc->parent_realize(dev, errp);
 139 }
 140
 141 static void cris_cpu_initfn(Object *obj)
 142 {
 143     CPUState *cs = CPU(obj);
 144     CRISCPU *cpu = CRIS_CPU(obj);
 145     CRISCPUClass *ccc = CRIS_CPU_GET_CLASS(obj);
 146     CPUCRISState *env = &cpu->env;
 147     static bool tcg_initialized;
 148
 149     cs->env_ptr = env;
 150     cpu_exec_init(env);
 151
 152     env->pregs[PR_VR] = ccc->vr;
 153
 154     if (tcg_enabled() && !tcg_initialized) {
 155         tcg_initialized = true;
 156         if (env->pregs[PR_VR] < 32) {
 157             cris_initialize_crisv10_tcg();
 158         } else {
 159             cris_initialize_tcg();
 160         }
 161     }
 162 }
 163
 164 static void crisv8_cpu_class_init(ObjectClass *oc, void *data)
 165 {
 166     CPUClass *cc = CPU_CLASS(oc);
 167     CRISCPUClass *ccc = CRIS_CPU_CLASS(oc);
 168
 169     ccc->vr = 8;
 170     cc->do_interrupt = crisv10_cpu_do_interrupt;
 171 }
 172
 173 static void crisv9_cpu_class_init(ObjectClass *oc, void *data)
 174 {
 175     CPUClass *cc = CPU_CLASS(oc);
 176     CRISCPUClass *ccc = CRIS_CPU_CLASS(oc);
 177
 178     ccc->vr = 9;
 179     cc->do_interrupt = crisv10_cpu_do_interrupt;
 180 }
 181
 182 static void crisv10_cpu_class_init(ObjectClass *oc, void *data)
 183 {
 184     CPUClass *cc = CPU_CLASS(oc);
 185     CRISCPUClass *ccc = CRIS_CPU_CLASS(oc);
 186
 187     ccc->vr = 10;
 188     cc->do_interrupt = crisv10_cpu_do_interrupt;
 189 }
 190
 191 static void crisv11_cpu_class_init(ObjectClass *oc, void *data)
 192 {
 193     CPUClass *cc = CPU_CLASS(oc);
 194     CRISCPUClass *ccc = CRIS_CPU_CLASS(oc);
 195
 196     ccc->vr = 11;
 197     cc->do_interrupt = crisv10_cpu_do_interrupt;
 198 }
 199
 200 static void crisv32_cpu_class_init(ObjectClass *oc, void *data)
 201 {
 202     CRISCPUClass *ccc = CRIS_CPU_CLASS(oc);
 203
 204     ccc->vr = 32;
 205 }
 206
 207 #define TYPE(model) model "-" TYPE_CRIS_CPU
 208
 209 static const TypeInfo cris_cpu_model_type_infos[] = {
 210     {
 211         .name = TYPE("crisv8"),
 212         .parent = TYPE_CRIS_CPU,
 213         .class_init = crisv8_cpu_class_init,
 214     }, {
 215         .name = TYPE("crisv9"),
 216         .parent = TYPE_CRIS_CPU,
 217         .class_init = crisv9_cpu_class_init,
 218     }, {
 219         .name = TYPE("crisv10"),
 220         .parent = TYPE_CRIS_CPU,
 221         .class_init = crisv10_cpu_class_init,
 222     }, {
 223         .name = TYPE("crisv11"),
 224         .parent = TYPE_CRIS_CPU,
 225         .class_init = crisv11_cpu_class_init,
 226     }, {
 227         .name = TYPE("crisv32"),
 228         .parent = TYPE_CRIS_CPU,
 229         .class_init = crisv32_cpu_class_init,
 230     }
 231 };
 232
 233 #undef TYPE
 234
 235 static void cris_cpu_class_init(ObjectClass *oc, void *data)
 236 {
 237     DeviceClass *dc = DEVICE_CLASS(oc);
 238     CPUClass *cc = CPU_CLASS(oc);
 239     CRISCPUClass *ccc = CRIS_CPU_CLASS(oc);
 240
 241     ccc->parent_realize = dc->realize;
 242     dc->realize = cris_cpu_realizefn;
 243
 244     ccc->parent_reset = cc->reset;
 245     cc->reset = cris_cpu_reset;
 246
 247     cc->class_by_name = cris_cpu_class_by_name;
 248     cc->do_interrupt = cris_cpu_do_interrupt;
 249     cc->dump_state = cris_cpu_dump_state;
 250 }
 251
 252 static const TypeInfo cris_cpu_type_info = {
 253     .name = TYPE_CRIS_CPU,
 254     .parent = TYPE_CPU,
 255     .instance_size = sizeof(CRISCPU),
 256     .instance_init = cris_cpu_initfn,
 257     .abstract = true,
 258     .class_size = sizeof(CRISCPUClass),
 259     .class_init = cris_cpu_class_init,
 260 };
 261
 262 static void cris_cpu_register_types(void)
 263 {
 264     int i;
 265
 266     type_register_static(&cris_cpu_type_info);
 267     for (i = 0; i < ARRAY_SIZE(cris_cpu_model_type_infos); i++) {
 268         type_register_static(&cris_cpu_model_type_infos[i]);
 269     }
 270 }
 271
 272 type_init(cris_cpu_register_types)