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 "qemu/osdep.h" 21 #include "qapi/error.h" 22 #include "cpu.h" 23 #include "qemu-common.h" 24 #include "exec/exec-all.h" 25 26 static void openrisc_cpu_set_pc(CPUState *cs, vaddr value) 27 { 28 OpenRISCCPU *cpu = OPENRISC_CPU(cs); 29 30 cpu->env.pc = value; 31 } 32 33 static bool openrisc_cpu_has_work(CPUState *cs) 34 { 35 return cs->interrupt_request & (CPU_INTERRUPT_HARD | 36 CPU_INTERRUPT_TIMER); 37 } 38 39 /* CPUClass::reset() */ 40 static void openrisc_cpu_reset(CPUState *s) 41 { 42 OpenRISCCPU *cpu = OPENRISC_CPU(s); 43 OpenRISCCPUClass *occ = OPENRISC_CPU_GET_CLASS(cpu); 44 45 occ->parent_reset(s); 46 47 memset(&cpu->env, 0, offsetof(CPUOpenRISCState, end_reset_fields)); 48 49 cpu->env.pc = 0x100; 50 cpu->env.sr = SR_FO | SR_SM; 51 cpu->env.lock_addr = -1; 52 s->exception_index = -1; 53 54 cpu->env.upr = UPR_UP | UPR_DMP | UPR_IMP | UPR_PICP | UPR_TTP | 55 UPR_PMP; 56 cpu->env.dmmucfgr = (DMMUCFGR_NTW & (0 << 2)) | (DMMUCFGR_NTS & (6 << 2)); 57 cpu->env.immucfgr = (IMMUCFGR_NTW & (0 << 2)) | (IMMUCFGR_NTS & (6 << 2)); 58 59 #ifndef CONFIG_USER_ONLY 60 cpu->env.picmr = 0x00000000; 61 cpu->env.picsr = 0x00000000; 62 63 cpu->env.ttmr = 0x00000000; 64 cpu->env.ttcr = 0x00000000; 65 #endif 66 } 67 68 static void openrisc_cpu_realizefn(DeviceState *dev, Error **errp) 69 { 70 CPUState *cs = CPU(dev); 71 OpenRISCCPUClass *occ = OPENRISC_CPU_GET_CLASS(dev); 72 Error *local_err = NULL; 73 74 cpu_exec_realizefn(cs, &local_err); 75 if (local_err != NULL) { 76 error_propagate(errp, local_err); 77 return; 78 } 79 80 qemu_init_vcpu(cs); 81 cpu_reset(cs); 82 83 occ->parent_realize(dev, errp); 84 } 85 86 static void openrisc_cpu_initfn(Object *obj) 87 { 88 CPUState *cs = CPU(obj); 89 OpenRISCCPU *cpu = OPENRISC_CPU(obj); 90 static int inited; 91 92 cs->env_ptr = &cpu->env; 93 94 #ifndef CONFIG_USER_ONLY 95 cpu_openrisc_mmu_init(cpu); 96 #endif 97 98 if (tcg_enabled() && !inited) { 99 inited = 1; 100 openrisc_translate_init(); 101 } 102 } 103 104 /* CPU models */ 105 106 static ObjectClass *openrisc_cpu_class_by_name(const char *cpu_model) 107 { 108 ObjectClass *oc; 109 char *typename; 110 111 typename = g_strdup_printf("%s-" TYPE_OPENRISC_CPU, cpu_model); 112 oc = object_class_by_name(typename); 113 g_free(typename); 114 if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_OPENRISC_CPU) || 115 object_class_is_abstract(oc))) { 116 return NULL; 117 } 118 return oc; 119 } 120 121 static void or1200_initfn(Object *obj) 122 { 123 OpenRISCCPU *cpu = OPENRISC_CPU(obj); 124 125 cpu->env.cpucfgr = CPUCFGR_NSGF | CPUCFGR_OB32S | CPUCFGR_OF32S | 126 CPUCFGR_EVBARP; 127 } 128 129 static void openrisc_any_initfn(Object *obj) 130 { 131 OpenRISCCPU *cpu = OPENRISC_CPU(obj); 132 133 cpu->env.cpucfgr = CPUCFGR_NSGF | CPUCFGR_OB32S | CPUCFGR_EVBARP; 134 } 135 136 typedef struct OpenRISCCPUInfo { 137 const char *name; 138 void (*initfn)(Object *obj); 139 } OpenRISCCPUInfo; 140 141 static const OpenRISCCPUInfo openrisc_cpus[] = { 142 { .name = "or1200", .initfn = or1200_initfn }, 143 { .name = "any", .initfn = openrisc_any_initfn }, 144 }; 145 146 static void openrisc_cpu_class_init(ObjectClass *oc, void *data) 147 { 148 OpenRISCCPUClass *occ = OPENRISC_CPU_CLASS(oc); 149 CPUClass *cc = CPU_CLASS(occ); 150 DeviceClass *dc = DEVICE_CLASS(oc); 151 152 occ->parent_realize = dc->realize; 153 dc->realize = openrisc_cpu_realizefn; 154 155 occ->parent_reset = cc->reset; 156 cc->reset = openrisc_cpu_reset; 157 158 cc->class_by_name = openrisc_cpu_class_by_name; 159 cc->has_work = openrisc_cpu_has_work; 160 cc->do_interrupt = openrisc_cpu_do_interrupt; 161 cc->cpu_exec_interrupt = openrisc_cpu_exec_interrupt; 162 cc->dump_state = openrisc_cpu_dump_state; 163 cc->set_pc = openrisc_cpu_set_pc; 164 cc->gdb_read_register = openrisc_cpu_gdb_read_register; 165 cc->gdb_write_register = openrisc_cpu_gdb_write_register; 166 #ifdef CONFIG_USER_ONLY 167 cc->handle_mmu_fault = openrisc_cpu_handle_mmu_fault; 168 #else 169 cc->get_phys_page_debug = openrisc_cpu_get_phys_page_debug; 170 dc->vmsd = &vmstate_openrisc_cpu; 171 #endif 172 cc->gdb_num_core_regs = 32 + 3; 173 } 174 175 static void cpu_register(const OpenRISCCPUInfo *info) 176 { 177 TypeInfo type_info = { 178 .parent = TYPE_OPENRISC_CPU, 179 .instance_size = sizeof(OpenRISCCPU), 180 .instance_init = info->initfn, 181 .class_size = sizeof(OpenRISCCPUClass), 182 }; 183 184 type_info.name = g_strdup_printf("%s-" TYPE_OPENRISC_CPU, info->name); 185 type_register(&type_info); 186 g_free((void *)type_info.name); 187 } 188 189 static const TypeInfo openrisc_cpu_type_info = { 190 .name = TYPE_OPENRISC_CPU, 191 .parent = TYPE_CPU, 192 .instance_size = sizeof(OpenRISCCPU), 193 .instance_init = openrisc_cpu_initfn, 194 .abstract = true, 195 .class_size = sizeof(OpenRISCCPUClass), 196 .class_init = openrisc_cpu_class_init, 197 }; 198 199 static void openrisc_cpu_register_types(void) 200 { 201 int i; 202 203 type_register_static(&openrisc_cpu_type_info); 204 for (i = 0; i < ARRAY_SIZE(openrisc_cpus); i++) { 205 cpu_register(&openrisc_cpus[i]); 206 } 207 } 208 209 /* Sort alphabetically by type name, except for "any". */ 210 static gint openrisc_cpu_list_compare(gconstpointer a, gconstpointer b) 211 { 212 ObjectClass *class_a = (ObjectClass *)a; 213 ObjectClass *class_b = (ObjectClass *)b; 214 const char *name_a, *name_b; 215 216 name_a = object_class_get_name(class_a); 217 name_b = object_class_get_name(class_b); 218 if (strcmp(name_a, "any-" TYPE_OPENRISC_CPU) == 0) { 219 return 1; 220 } else if (strcmp(name_b, "any-" TYPE_OPENRISC_CPU) == 0) { 221 return -1; 222 } else { 223 return strcmp(name_a, name_b); 224 } 225 } 226 227 static void openrisc_cpu_list_entry(gpointer data, gpointer user_data) 228 { 229 ObjectClass *oc = data; 230 CPUListState *s = user_data; 231 const char *typename; 232 char *name; 233 234 typename = object_class_get_name(oc); 235 name = g_strndup(typename, 236 strlen(typename) - strlen("-" TYPE_OPENRISC_CPU)); 237 (*s->cpu_fprintf)(s->file, " %s\n", 238 name); 239 g_free(name); 240 } 241 242 void cpu_openrisc_list(FILE *f, fprintf_function cpu_fprintf) 243 { 244 CPUListState s = { 245 .file = f, 246 .cpu_fprintf = cpu_fprintf, 247 }; 248 GSList *list; 249 250 list = object_class_get_list(TYPE_OPENRISC_CPU, false); 251 list = g_slist_sort(list, openrisc_cpu_list_compare); 252 (*cpu_fprintf)(f, "Available CPUs:\n"); 253 g_slist_foreach(list, openrisc_cpu_list_entry, &s); 254 g_slist_free(list); 255 } 256 257 type_init(openrisc_cpu_register_types) 258