target-openrisc/cpu.c

   1 /*
   2  * QEMU OpenRISC CPU
   3  *
   4  * Copyright (c) 2012 Jia Liu <proljc@gmail.com>
   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     memset(&cpu->env, 0, offsetof(CPUOpenRISCState, breakpoints));
  45
  46     tlb_flush(&cpu->env, 1);
  47     /*tb_flush(&cpu->env);    FIXME: Do we need it?  */
  48
  49     cpu->env.pc = 0x100;
  50     cpu->env.sr = SR_FO | SR_SM;
  51     s->exception_index = -1;
  52
  53     cpu->env.upr = UPR_UP | UPR_DMP | UPR_IMP | UPR_PICP | UPR_TTP;
  54     cpu->env.cpucfgr = CPUCFGR_OB32S | CPUCFGR_OF32S;
  55     cpu->env.dmmucfgr = (DMMUCFGR_NTW & (0 << 2)) | (DMMUCFGR_NTS & (6 << 2));
  56     cpu->env.immucfgr = (IMMUCFGR_NTW & (0 << 2)) | (IMMUCFGR_NTS & (6 << 2));
  57
  58 #ifndef CONFIG_USER_ONLY
  59     cpu->env.picmr = 0x00000000;
  60     cpu->env.picsr = 0x00000000;
  61
  62     cpu->env.ttmr = 0x00000000;
  63     cpu->env.ttcr = 0x00000000;
  64 #endif
  65 }
  66
  67 static inline void set_feature(OpenRISCCPU *cpu, int feature)
  68 {
  69     cpu->feature |= feature;
  70     cpu->env.cpucfgr = cpu->feature;
  71 }
  72
  73 static void openrisc_cpu_realizefn(DeviceState *dev, Error **errp)
  74 {
  75     CPUState *cs = CPU(dev);
  76     OpenRISCCPUClass *occ = OPENRISC_CPU_GET_CLASS(dev);
  77
  78     qemu_init_vcpu(cs);
  79     cpu_reset(cs);
  80
  81     occ->parent_realize(dev, errp);
  82 }
  83
  84 static void openrisc_cpu_initfn(Object *obj)
  85 {
  86     CPUState *cs = CPU(obj);
  87     OpenRISCCPU *cpu = OPENRISC_CPU(obj);
  88     static int inited;
  89
  90     cs->env_ptr = &cpu->env;
  91     cpu_exec_init(&cpu->env);
  92
  93 #ifndef CONFIG_USER_ONLY
  94     cpu_openrisc_mmu_init(cpu);
  95 #endif
  96
  97     if (tcg_enabled() && !inited) {
  98         inited = 1;
  99         openrisc_translate_init();
 100     }
 101 }
 102
 103 /* CPU models */
 104
 105 static ObjectClass *openrisc_cpu_class_by_name(const char *cpu_model)
 106 {
 107     ObjectClass *oc;
 108     char *typename;
 109
 110     if (cpu_model == NULL) {
 111         return NULL;
 112     }
 113
 114     typename = g_strdup_printf("%s-" TYPE_OPENRISC_CPU, cpu_model);
 115     oc = object_class_by_name(typename);
 116     g_free(typename);
 117     if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_OPENRISC_CPU) ||
 118                        object_class_is_abstract(oc))) {
 119         return NULL;
 120     }
 121     return oc;
 122 }
 123
 124 static void or1200_initfn(Object *obj)
 125 {
 126     OpenRISCCPU *cpu = OPENRISC_CPU(obj);
 127
 128     set_feature(cpu, OPENRISC_FEATURE_OB32S);
 129     set_feature(cpu, OPENRISC_FEATURE_OF32S);
 130 }
 131
 132 static void openrisc_any_initfn(Object *obj)
 133 {
 134     OpenRISCCPU *cpu = OPENRISC_CPU(obj);
 135
 136     set_feature(cpu, OPENRISC_FEATURE_OB32S);
 137 }
 138
 139 typedef struct OpenRISCCPUInfo {
 140     const char *name;
 141     void (*initfn)(Object *obj);
 142 } OpenRISCCPUInfo;
 143
 144 static const OpenRISCCPUInfo openrisc_cpus[] = {
 145     { .name = "or1200",      .initfn = or1200_initfn },
 146     { .name = "any",         .initfn = openrisc_any_initfn },
 147 };
 148
 149 static void openrisc_cpu_class_init(ObjectClass *oc, void *data)
 150 {
 151     OpenRISCCPUClass *occ = OPENRISC_CPU_CLASS(oc);
 152     CPUClass *cc = CPU_CLASS(occ);
 153     DeviceClass *dc = DEVICE_CLASS(oc);
 154
 155     occ->parent_realize = dc->realize;
 156     dc->realize = openrisc_cpu_realizefn;
 157
 158     occ->parent_reset = cc->reset;
 159     cc->reset = openrisc_cpu_reset;
 160
 161     cc->class_by_name = openrisc_cpu_class_by_name;
 162     cc->has_work = openrisc_cpu_has_work;
 163     cc->do_interrupt = openrisc_cpu_do_interrupt;
 164     cc->dump_state = openrisc_cpu_dump_state;
 165     cc->set_pc = openrisc_cpu_set_pc;
 166     cc->gdb_read_register = openrisc_cpu_gdb_read_register;
 167     cc->gdb_write_register = openrisc_cpu_gdb_write_register;
 168 #ifdef CONFIG_USER_ONLY
 169     cc->handle_mmu_fault = openrisc_cpu_handle_mmu_fault;
 170 #else
 171     cc->get_phys_page_debug = openrisc_cpu_get_phys_page_debug;
 172     dc->vmsd = &vmstate_openrisc_cpu;
 173 #endif
 174     cc->gdb_num_core_regs = 32 + 3;
 175 }
 176
 177 static void cpu_register(const OpenRISCCPUInfo *info)
 178 {
 179     TypeInfo type_info = {
 180         .parent = TYPE_OPENRISC_CPU,
 181         .instance_size = sizeof(OpenRISCCPU),
 182         .instance_init = info->initfn,
 183         .class_size = sizeof(OpenRISCCPUClass),
 184     };
 185
 186     type_info.name = g_strdup_printf("%s-" TYPE_OPENRISC_CPU, info->name);
 187     type_register(&type_info);
 188     g_free((void *)type_info.name);
 189 }
 190
 191 static const TypeInfo openrisc_cpu_type_info = {
 192     .name = TYPE_OPENRISC_CPU,
 193     .parent = TYPE_CPU,
 194     .instance_size = sizeof(OpenRISCCPU),
 195     .instance_init = openrisc_cpu_initfn,
 196     .abstract = true,
 197     .class_size = sizeof(OpenRISCCPUClass),
 198     .class_init = openrisc_cpu_class_init,
 199 };
 200
 201 static void openrisc_cpu_register_types(void)
 202 {
 203     int i;
 204
 205     type_register_static(&openrisc_cpu_type_info);
 206     for (i = 0; i < ARRAY_SIZE(openrisc_cpus); i++) {
 207         cpu_register(&openrisc_cpus[i]);
 208     }
 209 }
 210
 211 OpenRISCCPU *cpu_openrisc_init(const char *cpu_model)
 212 {
 213     return OPENRISC_CPU(cpu_generic_init(TYPE_OPENRISC_CPU, cpu_model));
 214 }
 215
 216 /* Sort alphabetically by type name, except for "any". */
 217 static gint openrisc_cpu_list_compare(gconstpointer a, gconstpointer b)
 218 {
 219     ObjectClass *class_a = (ObjectClass *)a;
 220     ObjectClass *class_b = (ObjectClass *)b;
 221     const char *name_a, *name_b;
 222
 223     name_a = object_class_get_name(class_a);
 224     name_b = object_class_get_name(class_b);
 225     if (strcmp(name_a, "any-" TYPE_OPENRISC_CPU) == 0) {
 226         return 1;
 227     } else if (strcmp(name_b, "any-" TYPE_OPENRISC_CPU) == 0) {
 228         return -1;
 229     } else {
 230         return strcmp(name_a, name_b);
 231     }
 232 }
 233
 234 static void openrisc_cpu_list_entry(gpointer data, gpointer user_data)
 235 {
 236     ObjectClass *oc = data;
 237     CPUListState *s = user_data;
 238     const char *typename;
 239     char *name;
 240
 241     typename = object_class_get_name(oc);
 242     name = g_strndup(typename,
 243                      strlen(typename) - strlen("-" TYPE_OPENRISC_CPU));
 244     (*s->cpu_fprintf)(s->file, "  %s\n",
 245                       name);
 246     g_free(name);
 247 }
 248
 249 void cpu_openrisc_list(FILE *f, fprintf_function cpu_fprintf)
 250 {
 251     CPUListState s = {
 252         .file = f,
 253         .cpu_fprintf = cpu_fprintf,
 254     };
 255     GSList *list;
 256
 257     list = object_class_get_list(TYPE_OPENRISC_CPU, false);
 258     list = g_slist_sort(list, openrisc_cpu_list_compare);
 259     (*cpu_fprintf)(f, "Available CPUs:\n");
 260     g_slist_foreach(list, openrisc_cpu_list_entry, &s);
 261     g_slist_free(list);
 262 }
 263
 264 type_init(openrisc_cpu_register_types)