target-tricore/cpu.c

   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 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 static inline void set_feature(CPUTriCoreState *env, int feature)
  24 {
  25     env->features |= 1ULL << feature;
  26 }
  27
  28 static void tricore_cpu_set_pc(CPUState *cs, vaddr value)
  29 {
  30     TriCoreCPU *cpu = TRICORE_CPU(cs);
  31     CPUTriCoreState *env = &cpu->env;
  32
  33     env->PC = value & ~(target_ulong)1;
  34 }
  35
  36 static void tricore_cpu_synchronize_from_tb(CPUState *cs,
  37                                             TranslationBlock *tb)
  38 {
  39     TriCoreCPU *cpu = TRICORE_CPU(cs);
  40     CPUTriCoreState *env = &cpu->env;
  41
  42     env->PC = tb->pc;
  43 }
  44
  45 static void tricore_cpu_reset(CPUState *s)
  46 {
  47     TriCoreCPU *cpu = TRICORE_CPU(s);
  48     TriCoreCPUClass *tcc = TRICORE_CPU_GET_CLASS(cpu);
  49     CPUTriCoreState *env = &cpu->env;
  50
  51     tcc->parent_reset(s);
  52
  53     tlb_flush(s, 1);
  54
  55     cpu_state_reset(env);
  56 }
  57
  58 static bool tricore_cpu_has_work(CPUState *cs)
  59 {
  60     return true;
  61 }
  62
  63 static void tricore_cpu_realizefn(DeviceState *dev, Error **errp)
  64 {
  65     CPUState *cs = CPU(dev);
  66     TriCoreCPU *cpu = TRICORE_CPU(dev);
  67     TriCoreCPUClass *tcc = TRICORE_CPU_GET_CLASS(dev);
  68     CPUTriCoreState *env = &cpu->env;
  69
  70     /* Some features automatically imply others */
  71     if (tricore_feature(env, TRICORE_FEATURE_16)) {
  72         set_feature(env, TRICORE_FEATURE_131);
  73     }
  74     if (tricore_feature(env, TRICORE_FEATURE_131)) {
  75         set_feature(env, TRICORE_FEATURE_13);
  76     }
  77     cpu_reset(cs);
  78     qemu_init_vcpu(cs);
  79
  80     tcc->parent_realize(dev, errp);
  81 }
  82
  83
  84 static void tricore_cpu_initfn(Object *obj)
  85 {
  86     CPUState *cs = CPU(obj);
  87     TriCoreCPU *cpu = TRICORE_CPU(obj);
  88     CPUTriCoreState *env = &cpu->env;
  89
  90     cs->env_ptr = env;
  91     cpu_exec_init(env);
  92
  93     if (tcg_enabled()) {
  94         tricore_tcg_init();
  95     }
  96 }
  97
  98 static ObjectClass *tricore_cpu_class_by_name(const char *cpu_model)
  99 {
 100     ObjectClass *oc;
 101     char *typename;
 102
 103     if (!cpu_model) {
 104         return NULL;
 105     }
 106
 107     typename = g_strdup_printf("%s-" TYPE_TRICORE_CPU, cpu_model);
 108     oc = object_class_by_name(typename);
 109     g_free(typename);
 110     if (!oc || !object_class_dynamic_cast(oc, TYPE_TRICORE_CPU) ||
 111         object_class_is_abstract(oc)) {
 112         return NULL;
 113     }
 114     return oc;
 115 }
 116
 117 static void tc1796_initfn(Object *obj)
 118 {
 119     TriCoreCPU *cpu = TRICORE_CPU(obj);
 120
 121     set_feature(&cpu->env, TRICORE_FEATURE_131);
 122 }
 123
 124 static void aurix_initfn(Object *obj)
 125 {
 126     TriCoreCPU *cpu = TRICORE_CPU(obj);
 127
 128     set_feature(&cpu->env, TRICORE_FEATURE_16);
 129 }
 130
 131 typedef struct TriCoreCPUInfo {
 132     const char *name;
 133     void (*initfn)(Object *obj);
 134     void (*class_init)(ObjectClass *oc, void *data);
 135 } TriCoreCPUInfo;
 136
 137 static const TriCoreCPUInfo tricore_cpus[] = {
 138     { .name = "tc1796",      .initfn = tc1796_initfn },
 139     { .name = "aurix",       .initfn = aurix_initfn },
 140     { .name = NULL }
 141 };
 142
 143 static void tricore_cpu_class_init(ObjectClass *c, void *data)
 144 {
 145     TriCoreCPUClass *mcc = TRICORE_CPU_CLASS(c);
 146     CPUClass *cc = CPU_CLASS(c);
 147     DeviceClass *dc = DEVICE_CLASS(c);
 148
 149     mcc->parent_realize = dc->realize;
 150     dc->realize = tricore_cpu_realizefn;
 151
 152     mcc->parent_reset = cc->reset;
 153     cc->reset = tricore_cpu_reset;
 154     cc->class_by_name = tricore_cpu_class_by_name;
 155     cc->has_work = tricore_cpu_has_work;
 156
 157     cc->dump_state = tricore_cpu_dump_state;
 158     cc->set_pc = tricore_cpu_set_pc;
 159     cc->synchronize_from_tb = tricore_cpu_synchronize_from_tb;
 160
 161 }
 162
 163 static void cpu_register(const TriCoreCPUInfo *info)
 164 {
 165     TypeInfo type_info = {
 166         .parent = TYPE_TRICORE_CPU,
 167         .instance_size = sizeof(TriCoreCPU),
 168         .instance_init = info->initfn,
 169         .class_size = sizeof(TriCoreCPUClass),
 170         .class_init = info->class_init,
 171     };
 172
 173     type_info.name = g_strdup_printf("%s-" TYPE_TRICORE_CPU, info->name);
 174     type_register(&type_info);
 175     g_free((void *)type_info.name);
 176 }
 177
 178 static const TypeInfo tricore_cpu_type_info = {
 179     .name = TYPE_TRICORE_CPU,
 180     .parent = TYPE_CPU,
 181     .instance_size = sizeof(TriCoreCPU),
 182     .instance_init = tricore_cpu_initfn,
 183     .abstract = true,
 184     .class_size = sizeof(TriCoreCPUClass),
 185     .class_init = tricore_cpu_class_init,
 186 };
 187
 188 static void tricore_cpu_register_types(void)
 189 {
 190     const TriCoreCPUInfo *info = tricore_cpus;
 191
 192     type_register_static(&tricore_cpu_type_info);
 193
 194     while (info->name) {
 195         cpu_register(info);
 196         info++;
 197     }
 198 }
 199
 200 type_init(tricore_cpu_register_types)