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 #endif 65 } 66 67 static void openrisc_cpu_realizefn(DeviceState *dev, Error **errp) 68 { 69 CPUState *cs = CPU(dev); 70 OpenRISCCPUClass *occ = OPENRISC_CPU_GET_CLASS(dev); 71 Error *local_err = NULL; 72 73 cpu_exec_realizefn(cs, &local_err); 74 if (local_err != NULL) { 75 error_propagate(errp, local_err); 76 return; 77 } 78 79 qemu_init_vcpu(cs); 80 cpu_reset(cs); 81 82 occ->parent_realize(dev, errp); 83 } 84 85 static void openrisc_cpu_initfn(Object *obj) 86 { 87 CPUState *cs = CPU(obj); 88 OpenRISCCPU *cpu = OPENRISC_CPU(obj); 89 90 cs->env_ptr = &cpu->env; 91 92 #ifndef CONFIG_USER_ONLY 93 cpu_openrisc_mmu_init(cpu); 94 #endif 95 } 96 97 /* CPU models */ 98 99 static ObjectClass *openrisc_cpu_class_by_name(const char *cpu_model) 100 { 101 ObjectClass *oc; 102 char *typename; 103 104 typename = g_strdup_printf(OPENRISC_CPU_TYPE_NAME("%s"), cpu_model); 105 oc = object_class_by_name(typename); 106 g_free(typename); 107 if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_OPENRISC_CPU) || 108 object_class_is_abstract(oc))) { 109 return NULL; 110 } 111 return oc; 112 } 113 114 static void or1200_initfn(Object *obj) 115 { 116 OpenRISCCPU *cpu = OPENRISC_CPU(obj); 117 118 cpu->env.cpucfgr = CPUCFGR_NSGF | CPUCFGR_OB32S | CPUCFGR_OF32S | 119 CPUCFGR_EVBARP; 120 } 121 122 static void openrisc_any_initfn(Object *obj) 123 { 124 OpenRISCCPU *cpu = OPENRISC_CPU(obj); 125 126 cpu->env.cpucfgr = CPUCFGR_NSGF | CPUCFGR_OB32S | CPUCFGR_EVBARP; 127 } 128 129 static void openrisc_cpu_class_init(ObjectClass *oc, void *data) 130 { 131 OpenRISCCPUClass *occ = OPENRISC_CPU_CLASS(oc); 132 CPUClass *cc = CPU_CLASS(occ); 133 DeviceClass *dc = DEVICE_CLASS(oc); 134 135 device_class_set_parent_realize(dc, openrisc_cpu_realizefn, 136 &occ->parent_realize); 137 occ->parent_reset = cc->reset; 138 cc->reset = openrisc_cpu_reset; 139 140 cc->class_by_name = openrisc_cpu_class_by_name; 141 cc->has_work = openrisc_cpu_has_work; 142 cc->do_interrupt = openrisc_cpu_do_interrupt; 143 cc->cpu_exec_interrupt = openrisc_cpu_exec_interrupt; 144 cc->dump_state = openrisc_cpu_dump_state; 145 cc->set_pc = openrisc_cpu_set_pc; 146 cc->gdb_read_register = openrisc_cpu_gdb_read_register; 147 cc->gdb_write_register = openrisc_cpu_gdb_write_register; 148 #ifdef CONFIG_USER_ONLY 149 cc->handle_mmu_fault = openrisc_cpu_handle_mmu_fault; 150 #else 151 cc->get_phys_page_debug = openrisc_cpu_get_phys_page_debug; 152 dc->vmsd = &vmstate_openrisc_cpu; 153 #endif 154 cc->gdb_num_core_regs = 32 + 3; 155 cc->tcg_initialize = openrisc_translate_init; 156 } 157 158 /* Sort alphabetically by type name, except for "any". */ 159 static gint openrisc_cpu_list_compare(gconstpointer a, gconstpointer b) 160 { 161 ObjectClass *class_a = (ObjectClass *)a; 162 ObjectClass *class_b = (ObjectClass *)b; 163 const char *name_a, *name_b; 164 165 name_a = object_class_get_name(class_a); 166 name_b = object_class_get_name(class_b); 167 if (strcmp(name_a, "any-" TYPE_OPENRISC_CPU) == 0) { 168 return 1; 169 } else if (strcmp(name_b, "any-" TYPE_OPENRISC_CPU) == 0) { 170 return -1; 171 } else { 172 return strcmp(name_a, name_b); 173 } 174 } 175 176 static void openrisc_cpu_list_entry(gpointer data, gpointer user_data) 177 { 178 ObjectClass *oc = data; 179 CPUListState *s = user_data; 180 const char *typename; 181 char *name; 182 183 typename = object_class_get_name(oc); 184 name = g_strndup(typename, 185 strlen(typename) - strlen("-" TYPE_OPENRISC_CPU)); 186 (*s->cpu_fprintf)(s->file, " %s\n", 187 name); 188 g_free(name); 189 } 190 191 void cpu_openrisc_list(FILE *f, fprintf_function cpu_fprintf) 192 { 193 CPUListState s = { 194 .file = f, 195 .cpu_fprintf = cpu_fprintf, 196 }; 197 GSList *list; 198 199 list = object_class_get_list(TYPE_OPENRISC_CPU, false); 200 list = g_slist_sort(list, openrisc_cpu_list_compare); 201 (*cpu_fprintf)(f, "Available CPUs:\n"); 202 g_slist_foreach(list, openrisc_cpu_list_entry, &s); 203 g_slist_free(list); 204 } 205 206 #define DEFINE_OPENRISC_CPU_TYPE(cpu_model, initfn) \ 207 { \ 208 .parent = TYPE_OPENRISC_CPU, \ 209 .instance_init = initfn, \ 210 .name = OPENRISC_CPU_TYPE_NAME(cpu_model), \ 211 } 212 213 static const TypeInfo openrisc_cpus_type_infos[] = { 214 { /* base class should be registered first */ 215 .name = TYPE_OPENRISC_CPU, 216 .parent = TYPE_CPU, 217 .instance_size = sizeof(OpenRISCCPU), 218 .instance_init = openrisc_cpu_initfn, 219 .abstract = true, 220 .class_size = sizeof(OpenRISCCPUClass), 221 .class_init = openrisc_cpu_class_init, 222 }, 223 DEFINE_OPENRISC_CPU_TYPE("or1200", or1200_initfn), 224 DEFINE_OPENRISC_CPU_TYPE("any", openrisc_any_initfn), 225 }; 226 227 DEFINE_TYPES(openrisc_cpus_type_infos) 228