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 /* CPUClass::reset() */
  24 static void openrisc_cpu_reset(CPUState *s)
  25 {
  26     OpenRISCCPU *cpu = OPENRISC_CPU(s);
  27     OpenRISCCPUClass *occ = OPENRISC_CPU_GET_CLASS(cpu);
  28
  29     if (qemu_loglevel_mask(CPU_LOG_RESET)) {
  30         qemu_log("CPU Reset (CPU %d)\n", s->cpu_index);
  31         log_cpu_state(&cpu->env, 0);
  32     }
  33
  34     occ->parent_reset(s);
  35
  36     memset(&cpu->env, 0, offsetof(CPUOpenRISCState, breakpoints));
  37
  38     tlb_flush(&cpu->env, 1);
  39     /*tb_flush(&cpu->env);    FIXME: Do we need it?  */
  40
  41     cpu->env.pc = 0x100;
  42     cpu->env.sr = SR_FO | SR_SM;
  43     cpu->env.exception_index = -1;
  44
  45     cpu->env.upr = UPR_UP | UPR_DMP | UPR_IMP | UPR_PICP | UPR_TTP;
  46     cpu->env.cpucfgr = CPUCFGR_OB32S | CPUCFGR_OF32S;
  47     cpu->env.dmmucfgr = (DMMUCFGR_NTW & (0 << 2)) | (DMMUCFGR_NTS & (6 << 2));
  48     cpu->env.immucfgr = (IMMUCFGR_NTW & (0 << 2)) | (IMMUCFGR_NTS & (6 << 2));
  49
  50 #ifndef CONFIG_USER_ONLY
  51     cpu->env.picmr = 0x00000000;
  52     cpu->env.picsr = 0x00000000;
  53
  54     cpu->env.ttmr = 0x00000000;
  55     cpu->env.ttcr = 0x00000000;
  56 #endif
  57 }
  58
  59 static inline void set_feature(OpenRISCCPU *cpu, int feature)
  60 {
  61     cpu->feature |= feature;
  62     cpu->env.cpucfgr = cpu->feature;
  63 }
  64
  65 void openrisc_cpu_realize(Object *obj, Error **errp)
  66 {
  67     OpenRISCCPU *cpu = OPENRISC_CPU(obj);
  68
  69     qemu_init_vcpu(&cpu->env);
  70     cpu_reset(CPU(cpu));
  71 }
  72
  73 static void openrisc_cpu_initfn(Object *obj)
  74 {
  75     OpenRISCCPU *cpu = OPENRISC_CPU(obj);
  76     static int inited;
  77
  78     cpu_exec_init(&cpu->env);
  79
  80 #ifndef CONFIG_USER_ONLY
  81     cpu_openrisc_mmu_init(cpu);
  82 #endif
  83
  84     if (tcg_enabled() && !inited) {
  85         inited = 1;
  86         openrisc_translate_init();
  87     }
  88 }
  89
  90 /* CPU models */
  91
  92 static ObjectClass *openrisc_cpu_class_by_name(const char *cpu_model)
  93 {
  94     ObjectClass *oc;
  95
  96     if (cpu_model == NULL) {
  97         return NULL;
  98     }
  99
 100     oc = object_class_by_name(cpu_model);
 101     if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_OPENRISC_CPU) ||
 102                        object_class_is_abstract(oc))) {
 103         return NULL;
 104     }
 105     return oc;
 106 }
 107
 108 static void or1200_initfn(Object *obj)
 109 {
 110     OpenRISCCPU *cpu = OPENRISC_CPU(obj);
 111
 112     set_feature(cpu, OPENRISC_FEATURE_OB32S);
 113     set_feature(cpu, OPENRISC_FEATURE_OF32S);
 114 }
 115
 116 static void openrisc_any_initfn(Object *obj)
 117 {
 118     OpenRISCCPU *cpu = OPENRISC_CPU(obj);
 119
 120     set_feature(cpu, OPENRISC_FEATURE_OB32S);
 121 }
 122
 123 typedef struct OpenRISCCPUInfo {
 124     const char *name;
 125     void (*initfn)(Object *obj);
 126 } OpenRISCCPUInfo;
 127
 128 static const OpenRISCCPUInfo openrisc_cpus[] = {
 129     { .name = "or1200",      .initfn = or1200_initfn },
 130     { .name = "any",         .initfn = openrisc_any_initfn },
 131 };
 132
 133 static void openrisc_cpu_class_init(ObjectClass *oc, void *data)
 134 {
 135     OpenRISCCPUClass *occ = OPENRISC_CPU_CLASS(oc);
 136     CPUClass *cc = CPU_CLASS(occ);
 137
 138     occ->parent_reset = cc->reset;
 139     cc->reset = openrisc_cpu_reset;
 140
 141     cc->class_by_name = openrisc_cpu_class_by_name;
 142 }
 143
 144 static void cpu_register(const OpenRISCCPUInfo *info)
 145 {
 146     TypeInfo type_info = {
 147         .parent = TYPE_OPENRISC_CPU,
 148         .instance_size = sizeof(OpenRISCCPU),
 149         .instance_init = info->initfn,
 150         .class_size = sizeof(OpenRISCCPUClass),
 151     };
 152
 153     type_info.name = g_strdup_printf("%s-" TYPE_OPENRISC_CPU, info->name);
 154     type_register(&type_info);
 155     g_free((void *)type_info.name);
 156 }
 157
 158 static const TypeInfo openrisc_cpu_type_info = {
 159     .name = TYPE_OPENRISC_CPU,
 160     .parent = TYPE_CPU,
 161     .instance_size = sizeof(OpenRISCCPU),
 162     .instance_init = openrisc_cpu_initfn,
 163     .abstract = true,
 164     .class_size = sizeof(OpenRISCCPUClass),
 165     .class_init = openrisc_cpu_class_init,
 166 };
 167
 168 static void openrisc_cpu_register_types(void)
 169 {
 170     int i;
 171
 172     type_register_static(&openrisc_cpu_type_info);
 173     for (i = 0; i < ARRAY_SIZE(openrisc_cpus); i++) {
 174         cpu_register(&openrisc_cpus[i]);
 175     }
 176 }
 177
 178 OpenRISCCPU *cpu_openrisc_init(const char *cpu_model)
 179 {
 180     OpenRISCCPU *cpu;
 181     ObjectClass *oc;
 182
 183     oc = openrisc_cpu_class_by_name(cpu_model);
 184     if (oc == NULL) {
 185         return NULL;
 186     }
 187     cpu = OPENRISC_CPU(object_new(object_class_get_name(oc)));
 188     cpu->env.cpu_model_str = cpu_model;
 189
 190     openrisc_cpu_realize(OBJECT(cpu), NULL);
 191
 192     return cpu;
 193 }
 194
 195 /* Sort alphabetically by type name, except for "any". */
 196 static gint openrisc_cpu_list_compare(gconstpointer a, gconstpointer b)
 197 {
 198     ObjectClass *class_a = (ObjectClass *)a;
 199     ObjectClass *class_b = (ObjectClass *)b;
 200     const char *name_a, *name_b;
 201
 202     name_a = object_class_get_name(class_a);
 203     name_b = object_class_get_name(class_b);
 204     if (strcmp(name_a, "any-" TYPE_OPENRISC_CPU) == 0) {
 205         return 1;
 206     } else if (strcmp(name_b, "any-" TYPE_OPENRISC_CPU) == 0) {
 207         return -1;
 208     } else {
 209         return strcmp(name_a, name_b);
 210     }
 211 }
 212
 213 static void openrisc_cpu_list_entry(gpointer data, gpointer user_data)
 214 {
 215     ObjectClass *oc = data;
 216     CPUListState *s = user_data;
 217     const char *typename;
 218     char *name;
 219
 220     typename = object_class_get_name(oc);
 221     name = g_strndup(typename,
 222                      strlen(typename) - strlen("-" TYPE_OPENRISC_CPU));
 223     (*s->cpu_fprintf)(s->file, "  %s\n",
 224                       name);
 225     g_free(name);
 226 }
 227
 228 void cpu_openrisc_list(FILE *f, fprintf_function cpu_fprintf)
 229 {
 230     CPUListState s = {
 231         .file = f,
 232         .cpu_fprintf = cpu_fprintf,
 233     };
 234     GSList *list;
 235
 236     list = object_class_get_list(TYPE_OPENRISC_CPU, false);
 237     list = g_slist_sort(list, openrisc_cpu_list_compare);
 238     (*cpu_fprintf)(f, "Available CPUs:\n");
 239     g_slist_foreach(list, openrisc_cpu_list_entry, &s);
 240     g_slist_free(list);
 241 }
 242
 243 type_init(openrisc_cpu_register_types)