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 static void cris_cpu_set_pc(CPUState *cs, vaddr value)
  30 {
  31     CRISCPU *cpu = CRIS_CPU(cs);
  32
  33     cpu->env.pc = value;
  34 }
  35
  36 /* CPUClass::reset() */
  37 static void cris_cpu_reset(CPUState *s)
  38 {
  39     CRISCPU *cpu = CRIS_CPU(s);
  40     CRISCPUClass *ccc = CRIS_CPU_GET_CLASS(cpu);
  41     CPUCRISState *env = &cpu->env;
  42     uint32_t vr;
  43
  44     ccc->parent_reset(s);
  45
  46     vr = env->pregs[PR_VR];
  47     memset(env, 0, offsetof(CPUCRISState, breakpoints));
  48     env->pregs[PR_VR] = vr;
  49     tlb_flush(env, 1);
  50
  51 #if defined(CONFIG_USER_ONLY)
  52     /* start in user mode with interrupts enabled.  */
  53     env->pregs[PR_CCS] |= U_FLAG | I_FLAG | P_FLAG;
  54 #else
  55     cris_mmu_init(env);
  56     env->pregs[PR_CCS] = 0;
  57 #endif
  58 }
  59
  60 static ObjectClass *cris_cpu_class_by_name(const char *cpu_model)
  61 {
  62     ObjectClass *oc;
  63     char *typename;
  64
  65     if (cpu_model == NULL) {
  66         return NULL;
  67     }
  68
  69     typename = g_strdup_printf("%s-" TYPE_CRIS_CPU, cpu_model);
  70     oc = object_class_by_name(typename);
  71     g_free(typename);
  72     if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_CRIS_CPU) ||
  73                        object_class_is_abstract(oc))) {
  74         oc = NULL;
  75     }
  76     return oc;
  77 }
  78
  79 CRISCPU *cpu_cris_init(const char *cpu_model)
  80 {
  81     CRISCPU *cpu;
  82     ObjectClass *oc;
  83
  84     oc = cris_cpu_class_by_name(cpu_model);
  85     if (oc == NULL) {
  86         return NULL;
  87     }
  88     cpu = CRIS_CPU(object_new(object_class_get_name(oc)));
  89
  90     object_property_set_bool(OBJECT(cpu), true, "realized", NULL);
  91
  92     return cpu;
  93 }
  94
  95 /* Sort alphabetically by VR. */
  96 static gint cris_cpu_list_compare(gconstpointer a, gconstpointer b)
  97 {
  98     CRISCPUClass *ccc_a = CRIS_CPU_CLASS(a);
  99     CRISCPUClass *ccc_b = CRIS_CPU_CLASS(b);
 100
 101     /*  */
 102     if (ccc_a->vr > ccc_b->vr) {
 103         return 1;
 104     } else if (ccc_a->vr < ccc_b->vr) {
 105         return -1;
 106     } else {
 107         return 0;
 108     }
 109 }
 110
 111 static void cris_cpu_list_entry(gpointer data, gpointer user_data)
 112 {
 113     ObjectClass *oc = data;
 114     CPUListState *s = user_data;
 115     const char *typename = object_class_get_name(oc);
 116     char *name;
 117
 118     name = g_strndup(typename, strlen(typename) - strlen("-" TYPE_CRIS_CPU));
 119     (*s->cpu_fprintf)(s->file, "  %s\n", name);
 120     g_free(name);
 121 }
 122
 123 void cris_cpu_list(FILE *f, fprintf_function cpu_fprintf)
 124 {
 125     CPUListState s = {
 126         .file = f,
 127         .cpu_fprintf = cpu_fprintf,
 128     };
 129     GSList *list;
 130
 131     list = object_class_get_list(TYPE_CRIS_CPU, false);
 132     list = g_slist_sort(list, cris_cpu_list_compare);
 133     (*cpu_fprintf)(f, "Available CPUs:\n");
 134     g_slist_foreach(list, cris_cpu_list_entry, &s);
 135     g_slist_free(list);
 136 }
 137
 138 static void cris_cpu_realizefn(DeviceState *dev, Error **errp)
 139 {
 140     CRISCPU *cpu = CRIS_CPU(dev);
 141     CRISCPUClass *ccc = CRIS_CPU_GET_CLASS(dev);
 142
 143     cpu_reset(CPU(cpu));
 144
 145     ccc->parent_realize(dev, errp);
 146 }
 147
 148 static void cris_cpu_initfn(Object *obj)
 149 {
 150     CPUState *cs = CPU(obj);
 151     CRISCPU *cpu = CRIS_CPU(obj);
 152     CRISCPUClass *ccc = CRIS_CPU_GET_CLASS(obj);
 153     CPUCRISState *env = &cpu->env;
 154     static bool tcg_initialized;
 155
 156     cs->env_ptr = env;
 157     cpu_exec_init(env);
 158
 159     env->pregs[PR_VR] = ccc->vr;
 160
 161     if (tcg_enabled() && !tcg_initialized) {
 162         tcg_initialized = true;
 163         if (env->pregs[PR_VR] < 32) {
 164             cris_initialize_crisv10_tcg();
 165         } else {
 166             cris_initialize_tcg();
 167         }
 168     }
 169 }
 170
 171 static void crisv8_cpu_class_init(ObjectClass *oc, void *data)
 172 {
 173     CPUClass *cc = CPU_CLASS(oc);
 174     CRISCPUClass *ccc = CRIS_CPU_CLASS(oc);
 175
 176     ccc->vr = 8;
 177     cc->do_interrupt = crisv10_cpu_do_interrupt;
 178     cc->gdb_read_register = crisv10_cpu_gdb_read_register;
 179 }
 180
 181 static void crisv9_cpu_class_init(ObjectClass *oc, void *data)
 182 {
 183     CPUClass *cc = CPU_CLASS(oc);
 184     CRISCPUClass *ccc = CRIS_CPU_CLASS(oc);
 185
 186     ccc->vr = 9;
 187     cc->do_interrupt = crisv10_cpu_do_interrupt;
 188     cc->gdb_read_register = crisv10_cpu_gdb_read_register;
 189 }
 190
 191 static void crisv10_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 = 10;
 197     cc->do_interrupt = crisv10_cpu_do_interrupt;
 198     cc->gdb_read_register = crisv10_cpu_gdb_read_register;
 199 }
 200
 201 static void crisv11_cpu_class_init(ObjectClass *oc, void *data)
 202 {
 203     CPUClass *cc = CPU_CLASS(oc);
 204     CRISCPUClass *ccc = CRIS_CPU_CLASS(oc);
 205
 206     ccc->vr = 11;
 207     cc->do_interrupt = crisv10_cpu_do_interrupt;
 208     cc->gdb_read_register = crisv10_cpu_gdb_read_register;
 209 }
 210
 211 static void crisv32_cpu_class_init(ObjectClass *oc, void *data)
 212 {
 213     CRISCPUClass *ccc = CRIS_CPU_CLASS(oc);
 214
 215     ccc->vr = 32;
 216 }
 217
 218 #define TYPE(model) model "-" TYPE_CRIS_CPU
 219
 220 static const TypeInfo cris_cpu_model_type_infos[] = {
 221     {
 222         .name = TYPE("crisv8"),
 223         .parent = TYPE_CRIS_CPU,
 224         .class_init = crisv8_cpu_class_init,
 225     }, {
 226         .name = TYPE("crisv9"),
 227         .parent = TYPE_CRIS_CPU,
 228         .class_init = crisv9_cpu_class_init,
 229     }, {
 230         .name = TYPE("crisv10"),
 231         .parent = TYPE_CRIS_CPU,
 232         .class_init = crisv10_cpu_class_init,
 233     }, {
 234         .name = TYPE("crisv11"),
 235         .parent = TYPE_CRIS_CPU,
 236         .class_init = crisv11_cpu_class_init,
 237     }, {
 238         .name = TYPE("crisv32"),
 239         .parent = TYPE_CRIS_CPU,
 240         .class_init = crisv32_cpu_class_init,
 241     }
 242 };
 243
 244 #undef TYPE
 245
 246 static void cris_cpu_class_init(ObjectClass *oc, void *data)
 247 {
 248     DeviceClass *dc = DEVICE_CLASS(oc);
 249     CPUClass *cc = CPU_CLASS(oc);
 250     CRISCPUClass *ccc = CRIS_CPU_CLASS(oc);
 251
 252     ccc->parent_realize = dc->realize;
 253     dc->realize = cris_cpu_realizefn;
 254
 255     ccc->parent_reset = cc->reset;
 256     cc->reset = cris_cpu_reset;
 257
 258     cc->class_by_name = cris_cpu_class_by_name;
 259     cc->do_interrupt = cris_cpu_do_interrupt;
 260     cc->dump_state = cris_cpu_dump_state;
 261     cc->set_pc = cris_cpu_set_pc;
 262     cc->gdb_read_register = cris_cpu_gdb_read_register;
 263     cc->gdb_write_register = cris_cpu_gdb_write_register;
 264 #ifndef CONFIG_USER_ONLY
 265     cc->get_phys_page_debug = cris_cpu_get_phys_page_debug;
 266 #endif
 267
 268     cc->gdb_num_core_regs = 49;
 269 }
 270
 271 static const TypeInfo cris_cpu_type_info = {
 272     .name = TYPE_CRIS_CPU,
 273     .parent = TYPE_CPU,
 274     .instance_size = sizeof(CRISCPU),
 275     .instance_init = cris_cpu_initfn,
 276     .abstract = true,
 277     .class_size = sizeof(CRISCPUClass),
 278     .class_init = cris_cpu_class_init,
 279 };
 280
 281 static void cris_cpu_register_types(void)
 282 {
 283     int i;
 284
 285     type_register_static(&cris_cpu_type_info);
 286     for (i = 0; i < ARRAY_SIZE(cris_cpu_model_type_infos); i++) {
 287         type_register_static(&cris_cpu_model_type_infos[i]);
 288     }
 289 }
 290
 291 type_init(cris_cpu_register_types)