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 2.1 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 "qemu/qemu-print.h" 23 #include "cpu.h" 24 25 static void openrisc_cpu_set_pc(CPUState *cs, vaddr value) 26 { 27 OpenRISCCPU *cpu = OPENRISC_CPU(cs); 28 29 cpu->env.pc = value; 30 cpu->env.dflag = 0; 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 static void openrisc_disas_set_info(CPUState *cpu, disassemble_info *info) 40 { 41 info->print_insn = print_insn_or1k; 42 } 43 44 /* CPUClass::reset() */ 45 static void openrisc_cpu_reset(CPUState *s) 46 { 47 OpenRISCCPU *cpu = OPENRISC_CPU(s); 48 OpenRISCCPUClass *occ = OPENRISC_CPU_GET_CLASS(cpu); 49 50 occ->parent_reset(s); 51 52 memset(&cpu->env, 0, offsetof(CPUOpenRISCState, end_reset_fields)); 53 54 cpu->env.pc = 0x100; 55 cpu->env.sr = SR_FO | SR_SM; 56 cpu->env.lock_addr = -1; 57 s->exception_index = -1; 58 cpu_set_fpcsr(&cpu->env, 0); 59 60 #ifndef CONFIG_USER_ONLY 61 cpu->env.picmr = 0x00000000; 62 cpu->env.picsr = 0x00000000; 63 64 cpu->env.ttmr = 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 OpenRISCCPU *cpu = OPENRISC_CPU(obj); 89 90 cpu_set_cpustate_pointers(cpu); 91 } 92 93 /* CPU models */ 94 95 static ObjectClass *openrisc_cpu_class_by_name(const char *cpu_model) 96 { 97 ObjectClass *oc; 98 char *typename; 99 100 typename = g_strdup_printf(OPENRISC_CPU_TYPE_NAME("%s"), cpu_model); 101 oc = object_class_by_name(typename); 102 g_free(typename); 103 if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_OPENRISC_CPU) || 104 object_class_is_abstract(oc))) { 105 return NULL; 106 } 107 return oc; 108 } 109 110 static void or1200_initfn(Object *obj) 111 { 112 OpenRISCCPU *cpu = OPENRISC_CPU(obj); 113 114 cpu->env.vr = 0x13000008; 115 cpu->env.upr = UPR_UP | UPR_DMP | UPR_IMP | UPR_PICP | UPR_TTP | UPR_PMP; 116 cpu->env.cpucfgr = CPUCFGR_NSGF | CPUCFGR_OB32S | CPUCFGR_OF32S | 117 CPUCFGR_EVBARP; 118 119 /* 1Way, TLB_SIZE entries. */ 120 cpu->env.dmmucfgr = (DMMUCFGR_NTW & (0 << 2)) 121 | (DMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2)); 122 cpu->env.immucfgr = (IMMUCFGR_NTW & (0 << 2)) 123 | (IMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2)); 124 } 125 126 static void openrisc_any_initfn(Object *obj) 127 { 128 OpenRISCCPU *cpu = OPENRISC_CPU(obj); 129 130 cpu->env.vr = 0x13000040; /* Obsolete VER + UVRP for new SPRs */ 131 cpu->env.vr2 = 0; /* No version specific id */ 132 cpu->env.avr = 0x01030000; /* Architecture v1.3 */ 133 134 cpu->env.upr = UPR_UP | UPR_DMP | UPR_IMP | UPR_PICP | UPR_TTP | UPR_PMP; 135 cpu->env.cpucfgr = CPUCFGR_NSGF | CPUCFGR_OB32S | CPUCFGR_OF32S | 136 CPUCFGR_AVRP | CPUCFGR_EVBARP | CPUCFGR_OF64A32S; 137 138 /* 1Way, TLB_SIZE entries. */ 139 cpu->env.dmmucfgr = (DMMUCFGR_NTW & (0 << 2)) 140 | (DMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2)); 141 cpu->env.immucfgr = (IMMUCFGR_NTW & (0 << 2)) 142 | (IMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2)); 143 } 144 145 static void openrisc_cpu_class_init(ObjectClass *oc, void *data) 146 { 147 OpenRISCCPUClass *occ = OPENRISC_CPU_CLASS(oc); 148 CPUClass *cc = CPU_CLASS(occ); 149 DeviceClass *dc = DEVICE_CLASS(oc); 150 151 device_class_set_parent_realize(dc, openrisc_cpu_realizefn, 152 &occ->parent_realize); 153 cpu_class_set_parent_reset(cc, openrisc_cpu_reset, &occ->parent_reset); 154 155 cc->class_by_name = openrisc_cpu_class_by_name; 156 cc->has_work = openrisc_cpu_has_work; 157 cc->do_interrupt = openrisc_cpu_do_interrupt; 158 cc->cpu_exec_interrupt = openrisc_cpu_exec_interrupt; 159 cc->dump_state = openrisc_cpu_dump_state; 160 cc->set_pc = openrisc_cpu_set_pc; 161 cc->gdb_read_register = openrisc_cpu_gdb_read_register; 162 cc->gdb_write_register = openrisc_cpu_gdb_write_register; 163 cc->tlb_fill = openrisc_cpu_tlb_fill; 164 #ifndef CONFIG_USER_ONLY 165 cc->get_phys_page_debug = openrisc_cpu_get_phys_page_debug; 166 dc->vmsd = &vmstate_openrisc_cpu; 167 #endif 168 cc->gdb_num_core_regs = 32 + 3; 169 cc->tcg_initialize = openrisc_translate_init; 170 cc->disas_set_info = openrisc_disas_set_info; 171 } 172 173 /* Sort alphabetically by type name, except for "any". */ 174 static gint openrisc_cpu_list_compare(gconstpointer a, gconstpointer b) 175 { 176 ObjectClass *class_a = (ObjectClass *)a; 177 ObjectClass *class_b = (ObjectClass *)b; 178 const char *name_a, *name_b; 179 180 name_a = object_class_get_name(class_a); 181 name_b = object_class_get_name(class_b); 182 if (strcmp(name_a, "any-" TYPE_OPENRISC_CPU) == 0) { 183 return 1; 184 } else if (strcmp(name_b, "any-" TYPE_OPENRISC_CPU) == 0) { 185 return -1; 186 } else { 187 return strcmp(name_a, name_b); 188 } 189 } 190 191 static void openrisc_cpu_list_entry(gpointer data, gpointer user_data) 192 { 193 ObjectClass *oc = data; 194 const char *typename; 195 char *name; 196 197 typename = object_class_get_name(oc); 198 name = g_strndup(typename, 199 strlen(typename) - strlen("-" TYPE_OPENRISC_CPU)); 200 qemu_printf(" %s\n", name); 201 g_free(name); 202 } 203 204 void cpu_openrisc_list(void) 205 { 206 GSList *list; 207 208 list = object_class_get_list(TYPE_OPENRISC_CPU, false); 209 list = g_slist_sort(list, openrisc_cpu_list_compare); 210 qemu_printf("Available CPUs:\n"); 211 g_slist_foreach(list, openrisc_cpu_list_entry, NULL); 212 g_slist_free(list); 213 } 214 215 #define DEFINE_OPENRISC_CPU_TYPE(cpu_model, initfn) \ 216 { \ 217 .parent = TYPE_OPENRISC_CPU, \ 218 .instance_init = initfn, \ 219 .name = OPENRISC_CPU_TYPE_NAME(cpu_model), \ 220 } 221 222 static const TypeInfo openrisc_cpus_type_infos[] = { 223 { /* base class should be registered first */ 224 .name = TYPE_OPENRISC_CPU, 225 .parent = TYPE_CPU, 226 .instance_size = sizeof(OpenRISCCPU), 227 .instance_init = openrisc_cpu_initfn, 228 .abstract = true, 229 .class_size = sizeof(OpenRISCCPUClass), 230 .class_init = openrisc_cpu_class_init, 231 }, 232 DEFINE_OPENRISC_CPU_TYPE("or1200", or1200_initfn), 233 DEFINE_OPENRISC_CPU_TYPE("any", openrisc_any_initfn), 234 }; 235 236 DEFINE_TYPES(openrisc_cpus_type_infos) 237