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 static bool cris_cpu_has_work(CPUState *cs)
  37 {
  38     return cs->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_NMI);
  39 }
  40
  41 /* CPUClass::reset() */
  42 static void cris_cpu_reset(CPUState *s)
  43 {
  44     CRISCPU *cpu = CRIS_CPU(s);
  45     CRISCPUClass *ccc = CRIS_CPU_GET_CLASS(cpu);
  46     CPUCRISState *env = &cpu->env;
  47     uint32_t vr;
  48
  49     ccc->parent_reset(s);
  50
  51     vr = env->pregs[PR_VR];
  52     memset(env, 0, offsetof(CPUCRISState, load_info));
  53     env->pregs[PR_VR] = vr;
  54     tlb_flush(s, 1);
  55
  56 #if defined(CONFIG_USER_ONLY)
  57     /* start in user mode with interrupts enabled.  */
  58     env->pregs[PR_CCS] |= U_FLAG | I_FLAG | P_FLAG;
  59 #else
  60     cris_mmu_init(env);
  61     env->pregs[PR_CCS] = 0;
  62 #endif
  63 }
  64
  65 static ObjectClass *cris_cpu_class_by_name(const char *cpu_model)
  66 {
  67     ObjectClass *oc;
  68     char *typename;
  69
  70     if (cpu_model == NULL) {
  71         return NULL;
  72     }
  73
  74 #if defined(CONFIG_USER_ONLY)
  75     if (strcasecmp(cpu_model, "any") == 0) {
  76         return object_class_by_name("crisv32-" TYPE_CRIS_CPU);
  77     }
  78 #endif
  79
  80     typename = g_strdup_printf("%s-" TYPE_CRIS_CPU, cpu_model);
  81     oc = object_class_by_name(typename);
  82     g_free(typename);
  83     if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_CRIS_CPU) ||
  84                        object_class_is_abstract(oc))) {
  85         oc = NULL;
  86     }
  87     return oc;
  88 }
  89
  90 CRISCPU *cpu_cris_init(const char *cpu_model)
  91 {
  92     return CRIS_CPU(cpu_generic_init(TYPE_CRIS_CPU, cpu_model));
  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     CPUState *cs = CPU(dev);
 141     CRISCPUClass *ccc = CRIS_CPU_GET_CLASS(dev);
 142
 143     cpu_reset(cs);
 144     qemu_init_vcpu(cs);
 145
 146     ccc->parent_realize(dev, errp);
 147 }
 148
 149 #ifndef CONFIG_USER_ONLY
 150 static void cris_cpu_set_irq(void *opaque, int irq, int level)
 151 {
 152     CRISCPU *cpu = opaque;
 153     CPUState *cs = CPU(cpu);
 154     int type = irq == CRIS_CPU_IRQ ? CPU_INTERRUPT_HARD : CPU_INTERRUPT_NMI;
 155
 156     if (level) {
 157         cpu_interrupt(cs, type);
 158     } else {
 159         cpu_reset_interrupt(cs, type);
 160     }
 161 }
 162 #endif
 163
 164 static void cris_cpu_initfn(Object *obj)
 165 {
 166     CPUState *cs = CPU(obj);
 167     CRISCPU *cpu = CRIS_CPU(obj);
 168     CRISCPUClass *ccc = CRIS_CPU_GET_CLASS(obj);
 169     CPUCRISState *env = &cpu->env;
 170     static bool tcg_initialized;
 171
 172     cs->env_ptr = env;
 173     cpu_exec_init(cs, &error_abort);
 174
 175     env->pregs[PR_VR] = ccc->vr;
 176
 177 #ifndef CONFIG_USER_ONLY
 178     /* IRQ and NMI lines.  */
 179     qdev_init_gpio_in(DEVICE(cpu), cris_cpu_set_irq, 2);
 180 #endif
 181
 182     if (tcg_enabled() && !tcg_initialized) {
 183         tcg_initialized = true;
 184         if (env->pregs[PR_VR] < 32) {
 185             cris_initialize_crisv10_tcg();
 186         } else {
 187             cris_initialize_tcg();
 188         }
 189     }
 190 }
 191
 192 static void crisv8_cpu_class_init(ObjectClass *oc, void *data)
 193 {
 194     CPUClass *cc = CPU_CLASS(oc);
 195     CRISCPUClass *ccc = CRIS_CPU_CLASS(oc);
 196
 197     ccc->vr = 8;
 198     cc->do_interrupt = crisv10_cpu_do_interrupt;
 199     cc->gdb_read_register = crisv10_cpu_gdb_read_register;
 200 }
 201
 202 static void crisv9_cpu_class_init(ObjectClass *oc, void *data)
 203 {
 204     CPUClass *cc = CPU_CLASS(oc);
 205     CRISCPUClass *ccc = CRIS_CPU_CLASS(oc);
 206
 207     ccc->vr = 9;
 208     cc->do_interrupt = crisv10_cpu_do_interrupt;
 209     cc->gdb_read_register = crisv10_cpu_gdb_read_register;
 210 }
 211
 212 static void crisv10_cpu_class_init(ObjectClass *oc, void *data)
 213 {
 214     CPUClass *cc = CPU_CLASS(oc);
 215     CRISCPUClass *ccc = CRIS_CPU_CLASS(oc);
 216
 217     ccc->vr = 10;
 218     cc->do_interrupt = crisv10_cpu_do_interrupt;
 219     cc->gdb_read_register = crisv10_cpu_gdb_read_register;
 220 }
 221
 222 static void crisv11_cpu_class_init(ObjectClass *oc, void *data)
 223 {
 224     CPUClass *cc = CPU_CLASS(oc);
 225     CRISCPUClass *ccc = CRIS_CPU_CLASS(oc);
 226
 227     ccc->vr = 11;
 228     cc->do_interrupt = crisv10_cpu_do_interrupt;
 229     cc->gdb_read_register = crisv10_cpu_gdb_read_register;
 230 }
 231
 232 static void crisv32_cpu_class_init(ObjectClass *oc, void *data)
 233 {
 234     CRISCPUClass *ccc = CRIS_CPU_CLASS(oc);
 235
 236     ccc->vr = 32;
 237 }
 238
 239 #define TYPE(model) model "-" TYPE_CRIS_CPU
 240
 241 static const TypeInfo cris_cpu_model_type_infos[] = {
 242     {
 243         .name = TYPE("crisv8"),
 244         .parent = TYPE_CRIS_CPU,
 245         .class_init = crisv8_cpu_class_init,
 246     }, {
 247         .name = TYPE("crisv9"),
 248         .parent = TYPE_CRIS_CPU,
 249         .class_init = crisv9_cpu_class_init,
 250     }, {
 251         .name = TYPE("crisv10"),
 252         .parent = TYPE_CRIS_CPU,
 253         .class_init = crisv10_cpu_class_init,
 254     }, {
 255         .name = TYPE("crisv11"),
 256         .parent = TYPE_CRIS_CPU,
 257         .class_init = crisv11_cpu_class_init,
 258     }, {
 259         .name = TYPE("crisv32"),
 260         .parent = TYPE_CRIS_CPU,
 261         .class_init = crisv32_cpu_class_init,
 262     }
 263 };
 264
 265 #undef TYPE
 266
 267 static void cris_cpu_class_init(ObjectClass *oc, void *data)
 268 {
 269     DeviceClass *dc = DEVICE_CLASS(oc);
 270     CPUClass *cc = CPU_CLASS(oc);
 271     CRISCPUClass *ccc = CRIS_CPU_CLASS(oc);
 272
 273     ccc->parent_realize = dc->realize;
 274     dc->realize = cris_cpu_realizefn;
 275
 276     ccc->parent_reset = cc->reset;
 277     cc->reset = cris_cpu_reset;
 278
 279     cc->class_by_name = cris_cpu_class_by_name;
 280     cc->has_work = cris_cpu_has_work;
 281     cc->do_interrupt = cris_cpu_do_interrupt;
 282     cc->cpu_exec_interrupt = cris_cpu_exec_interrupt;
 283     cc->dump_state = cris_cpu_dump_state;
 284     cc->set_pc = cris_cpu_set_pc;
 285     cc->gdb_read_register = cris_cpu_gdb_read_register;
 286     cc->gdb_write_register = cris_cpu_gdb_write_register;
 287 #ifdef CONFIG_USER_ONLY
 288     cc->handle_mmu_fault = cris_cpu_handle_mmu_fault;
 289 #else
 290     cc->get_phys_page_debug = cris_cpu_get_phys_page_debug;
 291 #endif
 292
 293     cc->gdb_num_core_regs = 49;
 294     cc->gdb_stop_before_watchpoint = true;
 295 }
 296
 297 static const TypeInfo cris_cpu_type_info = {
 298     .name = TYPE_CRIS_CPU,
 299     .parent = TYPE_CPU,
 300     .instance_size = sizeof(CRISCPU),
 301     .instance_init = cris_cpu_initfn,
 302     .abstract = true,
 303     .class_size = sizeof(CRISCPUClass),
 304     .class_init = cris_cpu_class_init,
 305 };
 306
 307 static void cris_cpu_register_types(void)
 308 {
 309     int i;
 310
 311     type_register_static(&cris_cpu_type_info);
 312     for (i = 0; i < ARRAY_SIZE(cris_cpu_model_type_infos); i++) {
 313         type_register_static(&cris_cpu_model_type_infos[i]);
 314     }
 315 }
 316
 317 type_init(cris_cpu_register_types)