target-openrisc/cpu.c

   1 /*
   2  * QEMU OpenRISC CPU
   3  *
   4  * Copyright (c) 2012 Jia Liu <[email protected]>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "cpu.h"
  21 #include "qemu-common.h"
  22
  23 static void openrisc_cpu_set_pc(CPUState *cs, vaddr value)
  24 {
  25     OpenRISCCPU *cpu = OPENRISC_CPU(cs);
  26
  27     cpu->env.pc = value;
  28 }
  29
  30 static bool openrisc_cpu_has_work(CPUState *cs)
  31 {
  32     return cs->interrupt_request & (CPU_INTERRUPT_HARD |
  33                                     CPU_INTERRUPT_TIMER);
  34 }
  35
  36 /* CPUClass::reset() */
  37 static void openrisc_cpu_reset(CPUState *s)
  38 {
  39     OpenRISCCPU *cpu = OPENRISC_CPU(s);
  40     OpenRISCCPUClass *occ = OPENRISC_CPU_GET_CLASS(cpu);
  41
  42     occ->parent_reset(s);
  43
  44 #ifndef CONFIG_USER_ONLY
  45     memset(&cpu->env, 0, offsetof(CPUOpenRISCState, tlb));
  46 #else
  47     memset(&cpu->env, 0, offsetof(CPUOpenRISCState, irq));
  48 #endif
  49
  50     tlb_flush(s, 1);
  51     /*tb_flush(&cpu->env);    FIXME: Do we need it?  */
  52
  53     cpu->env.pc = 0x100;
  54     cpu->env.sr = SR_FO | SR_SM;
  55     s->exception_index = -1;
  56
  57     cpu->env.upr = UPR_UP | UPR_DMP | UPR_IMP | UPR_PICP | UPR_TTP;
  58     cpu->env.cpucfgr = CPUCFGR_OB32S | CPUCFGR_OF32S;
  59     cpu->env.dmmucfgr = (DMMUCFGR_NTW & (0 << 2)) | (DMMUCFGR_NTS & (6 << 2));
  60     cpu->env.immucfgr = (IMMUCFGR_NTW & (0 << 2)) | (IMMUCFGR_NTS & (6 << 2));
  61
  62 #ifndef CONFIG_USER_ONLY
  63     cpu->env.picmr = 0x00000000;
  64     cpu->env.picsr = 0x00000000;
  65
  66     cpu->env.ttmr = 0x00000000;
  67     cpu->env.ttcr = 0x00000000;
  68 #endif
  69 }
  70
  71 static inline void set_feature(OpenRISCCPU *cpu, int feature)
  72 {
  73     cpu->feature |= feature;
  74     cpu->env.cpucfgr = cpu->feature;
  75 }
  76
  77 static void openrisc_cpu_realizefn(DeviceState *dev, Error **errp)
  78 {
  79     CPUState *cs = CPU(dev);
  80     OpenRISCCPUClass *occ = OPENRISC_CPU_GET_CLASS(dev);
  81
  82     qemu_init_vcpu(cs);
  83     cpu_reset(cs);
  84
  85     occ->parent_realize(dev, errp);
  86 }
  87
  88 static void openrisc_cpu_initfn(Object *obj)
  89 {
  90     CPUState *cs = CPU(obj);
  91     OpenRISCCPU *cpu = OPENRISC_CPU(obj);
  92     static int inited;
  93
  94     cs->env_ptr = &cpu->env;
  95     cpu_exec_init(&cpu->env);
  96
  97 #ifndef CONFIG_USER_ONLY
  98     cpu_openrisc_mmu_init(cpu);
  99 #endif
 100
 101     if (tcg_enabled() && !inited) {
 102         inited = 1;
 103         openrisc_translate_init();
 104     }
 105 }
 106
 107 /* CPU models */
 108
 109 static ObjectClass *openrisc_cpu_class_by_name(const char *cpu_model)
 110 {
 111     ObjectClass *oc;
 112     char *typename;
 113
 114     if (cpu_model == NULL) {
 115         return NULL;
 116     }
 117
 118     typename = g_strdup_printf("%s-" TYPE_OPENRISC_CPU, cpu_model);
 119     oc = object_class_by_name(typename);
 120     g_free(typename);
 121     if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_OPENRISC_CPU) ||
 122                        object_class_is_abstract(oc))) {
 123         return NULL;
 124     }
 125     return oc;
 126 }
 127
 128 static void or1200_initfn(Object *obj)
 129 {
 130     OpenRISCCPU *cpu = OPENRISC_CPU(obj);
 131
 132     set_feature(cpu, OPENRISC_FEATURE_OB32S);
 133     set_feature(cpu, OPENRISC_FEATURE_OF32S);
 134 }
 135
 136 static void openrisc_any_initfn(Object *obj)
 137 {
 138     OpenRISCCPU *cpu = OPENRISC_CPU(obj);
 139
 140     set_feature(cpu, OPENRISC_FEATURE_OB32S);
 141 }
 142
 143 typedef struct OpenRISCCPUInfo {
 144     const char *name;
 145     void (*initfn)(Object *obj);
 146 } OpenRISCCPUInfo;
 147
 148 static const OpenRISCCPUInfo openrisc_cpus[] = {
 149     { .name = "or1200",      .initfn = or1200_initfn },
 150     { .name = "any",         .initfn = openrisc_any_initfn },
 151 };
 152
 153 static void openrisc_cpu_class_init(ObjectClass *oc, void *data)
 154 {
 155     OpenRISCCPUClass *occ = OPENRISC_CPU_CLASS(oc);
 156     CPUClass *cc = CPU_CLASS(occ);
 157     DeviceClass *dc = DEVICE_CLASS(oc);
 158
 159     occ->parent_realize = dc->realize;
 160     dc->realize = openrisc_cpu_realizefn;
 161
 162     occ->parent_reset = cc->reset;
 163     cc->reset = openrisc_cpu_reset;
 164
 165     cc->class_by_name = openrisc_cpu_class_by_name;
 166     cc->has_work = openrisc_cpu_has_work;
 167     cc->do_interrupt = openrisc_cpu_do_interrupt;
 168     cc->dump_state = openrisc_cpu_dump_state;
 169     cc->set_pc = openrisc_cpu_set_pc;
 170     cc->gdb_read_register = openrisc_cpu_gdb_read_register;
 171     cc->gdb_write_register = openrisc_cpu_gdb_write_register;
 172 #ifdef CONFIG_USER_ONLY
 173     cc->handle_mmu_fault = openrisc_cpu_handle_mmu_fault;
 174 #else
 175     cc->get_phys_page_debug = openrisc_cpu_get_phys_page_debug;
 176     dc->vmsd = &vmstate_openrisc_cpu;
 177 #endif
 178     cc->gdb_num_core_regs = 32 + 3;
 179 }
 180
 181 static void cpu_register(const OpenRISCCPUInfo *info)
 182 {
 183     TypeInfo type_info = {
 184         .parent = TYPE_OPENRISC_CPU,
 185         .instance_size = sizeof(OpenRISCCPU),
 186         .instance_init = info->initfn,
 187         .class_size = sizeof(OpenRISCCPUClass),
 188     };
 189
 190     type_info.name = g_strdup_printf("%s-" TYPE_OPENRISC_CPU, info->name);
 191     type_register(&type_info);
 192     g_free((void *)type_info.name);
 193 }
 194
 195 static const TypeInfo openrisc_cpu_type_info = {
 196     .name = TYPE_OPENRISC_CPU,
 197     .parent = TYPE_CPU,
 198     .instance_size = sizeof(OpenRISCCPU),
 199     .instance_init = openrisc_cpu_initfn,
 200     .abstract = true,
 201     .class_size = sizeof(OpenRISCCPUClass),
 202     .class_init = openrisc_cpu_class_init,
 203 };
 204
 205 static void openrisc_cpu_register_types(void)
 206 {
 207     int i;
 208
 209     type_register_static(&openrisc_cpu_type_info);
 210     for (i = 0; i < ARRAY_SIZE(openrisc_cpus); i++) {
 211         cpu_register(&openrisc_cpus[i]);
 212     }
 213 }
 214
 215 OpenRISCCPU *cpu_openrisc_init(const char *cpu_model)
 216 {
 217     return OPENRISC_CPU(cpu_generic_init(TYPE_OPENRISC_CPU, cpu_model));
 218 }
 219
 220 /* Sort alphabetically by type name, except for "any". */
 221 static gint openrisc_cpu_list_compare(gconstpointer a, gconstpointer b)
 222 {
 223     ObjectClass *class_a = (ObjectClass *)a;
 224     ObjectClass *class_b = (ObjectClass *)b;
 225     const char *name_a, *name_b;
 226
 227     name_a = object_class_get_name(class_a);
 228     name_b = object_class_get_name(class_b);
 229     if (strcmp(name_a, "any-" TYPE_OPENRISC_CPU) == 0) {
 230         return 1;
 231     } else if (strcmp(name_b, "any-" TYPE_OPENRISC_CPU) == 0) {
 232         return -1;
 233     } else {
 234         return strcmp(name_a, name_b);
 235     }
 236 }
 237
 238 static void openrisc_cpu_list_entry(gpointer data, gpointer user_data)
 239 {
 240     ObjectClass *oc = data;
 241     CPUListState *s = user_data;
 242     const char *typename;
 243     char *name;
 244
 245     typename = object_class_get_name(oc);
 246     name = g_strndup(typename,
 247                      strlen(typename) - strlen("-" TYPE_OPENRISC_CPU));
 248     (*s->cpu_fprintf)(s->file, "  %s\n",
 249                       name);
 250     g_free(name);
 251 }
 252
 253 void cpu_openrisc_list(FILE *f, fprintf_function cpu_fprintf)
 254 {
 255     CPUListState s = {
 256         .file = f,
 257         .cpu_fprintf = cpu_fprintf,
 258     };
 259     GSList *list;
 260
 261     list = object_class_get_list(TYPE_OPENRISC_CPU, false);
 262     list = g_slist_sort(list, openrisc_cpu_list_compare);
 263     (*cpu_fprintf)(f, "Available CPUs:\n");
 264     g_slist_foreach(list, openrisc_cpu_list_entry, &s);
 265     g_slist_free(list);
 266 }
 267
 268 type_init(openrisc_cpu_register_types)