cpu.c (6230B)
1 /* 2 * TriCore emulation for qemu: main translation routines. 3 * 4 * Copyright (c) 2012-2014 Bastian Koppelmann C-Lab/University Paderborn 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 "cpu.h" 23 #include "exec/exec-all.h" 24 #include "qemu/error-report.h" 25 26 static inline void set_feature(CPUTriCoreState *env, int feature) 27 { 28 env->features |= 1ULL << feature; 29 } 30 31 static gchar *tricore_gdb_arch_name(CPUState *cs) 32 { 33 return g_strdup("tricore"); 34 } 35 36 static void tricore_cpu_set_pc(CPUState *cs, vaddr value) 37 { 38 TriCoreCPU *cpu = TRICORE_CPU(cs); 39 CPUTriCoreState *env = &cpu->env; 40 41 env->PC = value & ~(target_ulong)1; 42 } 43 44 static vaddr tricore_cpu_get_pc(CPUState *cs) 45 { 46 TriCoreCPU *cpu = TRICORE_CPU(cs); 47 CPUTriCoreState *env = &cpu->env; 48 49 return env->PC; 50 } 51 52 static void tricore_cpu_synchronize_from_tb(CPUState *cs, 53 const TranslationBlock *tb) 54 { 55 TriCoreCPU *cpu = TRICORE_CPU(cs); 56 CPUTriCoreState *env = &cpu->env; 57 58 env->PC = tb_pc(tb); 59 } 60 61 static void tricore_restore_state_to_opc(CPUState *cs, 62 const TranslationBlock *tb, 63 const uint64_t *data) 64 { 65 TriCoreCPU *cpu = TRICORE_CPU(cs); 66 CPUTriCoreState *env = &cpu->env; 67 68 env->PC = data[0]; 69 } 70 71 static void tricore_cpu_reset(DeviceState *dev) 72 { 73 CPUState *s = CPU(dev); 74 TriCoreCPU *cpu = TRICORE_CPU(s); 75 TriCoreCPUClass *tcc = TRICORE_CPU_GET_CLASS(cpu); 76 CPUTriCoreState *env = &cpu->env; 77 78 tcc->parent_reset(dev); 79 80 cpu_state_reset(env); 81 } 82 83 static bool tricore_cpu_has_work(CPUState *cs) 84 { 85 return true; 86 } 87 88 static void tricore_cpu_realizefn(DeviceState *dev, Error **errp) 89 { 90 CPUState *cs = CPU(dev); 91 TriCoreCPU *cpu = TRICORE_CPU(dev); 92 TriCoreCPUClass *tcc = TRICORE_CPU_GET_CLASS(dev); 93 CPUTriCoreState *env = &cpu->env; 94 Error *local_err = NULL; 95 96 cpu_exec_realizefn(cs, &local_err); 97 if (local_err != NULL) { 98 error_propagate(errp, local_err); 99 return; 100 } 101 102 /* Some features automatically imply others */ 103 if (tricore_feature(env, TRICORE_FEATURE_161)) { 104 set_feature(env, TRICORE_FEATURE_16); 105 } 106 107 if (tricore_feature(env, TRICORE_FEATURE_16)) { 108 set_feature(env, TRICORE_FEATURE_131); 109 } 110 if (tricore_feature(env, TRICORE_FEATURE_131)) { 111 set_feature(env, TRICORE_FEATURE_13); 112 } 113 cpu_reset(cs); 114 qemu_init_vcpu(cs); 115 116 tcc->parent_realize(dev, errp); 117 } 118 119 120 static void tricore_cpu_initfn(Object *obj) 121 { 122 TriCoreCPU *cpu = TRICORE_CPU(obj); 123 124 cpu_set_cpustate_pointers(cpu); 125 } 126 127 static ObjectClass *tricore_cpu_class_by_name(const char *cpu_model) 128 { 129 ObjectClass *oc; 130 char *typename; 131 132 typename = g_strdup_printf(TRICORE_CPU_TYPE_NAME("%s"), cpu_model); 133 oc = object_class_by_name(typename); 134 g_free(typename); 135 if (!oc || !object_class_dynamic_cast(oc, TYPE_TRICORE_CPU) || 136 object_class_is_abstract(oc)) { 137 return NULL; 138 } 139 return oc; 140 } 141 142 static void tc1796_initfn(Object *obj) 143 { 144 TriCoreCPU *cpu = TRICORE_CPU(obj); 145 146 set_feature(&cpu->env, TRICORE_FEATURE_13); 147 } 148 149 static void tc1797_initfn(Object *obj) 150 { 151 TriCoreCPU *cpu = TRICORE_CPU(obj); 152 153 set_feature(&cpu->env, TRICORE_FEATURE_131); 154 } 155 156 static void tc27x_initfn(Object *obj) 157 { 158 TriCoreCPU *cpu = TRICORE_CPU(obj); 159 160 set_feature(&cpu->env, TRICORE_FEATURE_161); 161 } 162 163 #include "hw/core/sysemu-cpu-ops.h" 164 165 static const struct SysemuCPUOps tricore_sysemu_ops = { 166 .get_phys_page_debug = tricore_cpu_get_phys_page_debug, 167 }; 168 169 #include "hw/core/tcg-cpu-ops.h" 170 171 static const struct TCGCPUOps tricore_tcg_ops = { 172 .initialize = tricore_tcg_init, 173 .synchronize_from_tb = tricore_cpu_synchronize_from_tb, 174 .restore_state_to_opc = tricore_restore_state_to_opc, 175 .tlb_fill = tricore_cpu_tlb_fill, 176 }; 177 178 static void tricore_cpu_class_init(ObjectClass *c, void *data) 179 { 180 TriCoreCPUClass *mcc = TRICORE_CPU_CLASS(c); 181 CPUClass *cc = CPU_CLASS(c); 182 DeviceClass *dc = DEVICE_CLASS(c); 183 184 device_class_set_parent_realize(dc, tricore_cpu_realizefn, 185 &mcc->parent_realize); 186 187 device_class_set_parent_reset(dc, tricore_cpu_reset, &mcc->parent_reset); 188 cc->class_by_name = tricore_cpu_class_by_name; 189 cc->has_work = tricore_cpu_has_work; 190 191 cc->gdb_read_register = tricore_cpu_gdb_read_register; 192 cc->gdb_write_register = tricore_cpu_gdb_write_register; 193 cc->gdb_num_core_regs = 44; 194 cc->gdb_arch_name = tricore_gdb_arch_name; 195 196 cc->dump_state = tricore_cpu_dump_state; 197 cc->set_pc = tricore_cpu_set_pc; 198 cc->get_pc = tricore_cpu_get_pc; 199 cc->sysemu_ops = &tricore_sysemu_ops; 200 cc->tcg_ops = &tricore_tcg_ops; 201 } 202 203 #define DEFINE_TRICORE_CPU_TYPE(cpu_model, initfn) \ 204 { \ 205 .parent = TYPE_TRICORE_CPU, \ 206 .instance_init = initfn, \ 207 .name = TRICORE_CPU_TYPE_NAME(cpu_model), \ 208 } 209 210 static const TypeInfo tricore_cpu_type_infos[] = { 211 { 212 .name = TYPE_TRICORE_CPU, 213 .parent = TYPE_CPU, 214 .instance_size = sizeof(TriCoreCPU), 215 .instance_init = tricore_cpu_initfn, 216 .abstract = true, 217 .class_size = sizeof(TriCoreCPUClass), 218 .class_init = tricore_cpu_class_init, 219 }, 220 DEFINE_TRICORE_CPU_TYPE("tc1796", tc1796_initfn), 221 DEFINE_TRICORE_CPU_TYPE("tc1797", tc1797_initfn), 222 DEFINE_TRICORE_CPU_TYPE("tc27x", tc27x_initfn), 223 }; 224 225 DEFINE_TYPES(tricore_cpu_type_infos)