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     TriCoreCPUClass *tcc = TRICORE_CPU_GET_CLASS(dev);
  67
  68     cpu_reset(cs);
  69     qemu_init_vcpu(cs);
  70
  71     tcc->parent_realize(dev, errp);
  72 }
  73
  74
  75 static void tricore_cpu_initfn(Object *obj)
  76 {
  77     CPUState *cs = CPU(obj);
  78     TriCoreCPU *cpu = TRICORE_CPU(obj);
  79     CPUTriCoreState *env = &cpu->env;
  80
  81     cs->env_ptr = env;
  82     cpu_exec_init(env);
  83
  84     if (tcg_enabled()) {
  85         tricore_tcg_init();
  86     }
  87 }
  88
  89 static ObjectClass *tricore_cpu_class_by_name(const char *cpu_model)
  90 {
  91     ObjectClass *oc;
  92     char *typename;
  93
  94     if (!cpu_model) {
  95         return NULL;
  96     }
  97
  98     typename = g_strdup_printf("%s-" TYPE_TRICORE_CPU, cpu_model);
  99     oc = object_class_by_name(typename);
 100     g_free(typename);
 101     if (!oc || !object_class_dynamic_cast(oc, TYPE_TRICORE_CPU) ||
 102         object_class_is_abstract(oc)) {
 103         return NULL;
 104     }
 105     return oc;
 106 }
 107
 108 static void tc1796_initfn(Object *obj)
 109 {
 110     TriCoreCPU *cpu = TRICORE_CPU(obj);
 111
 112     set_feature(&cpu->env, TRICORE_FEATURE_13);
 113 }
 114
 115 static void aurix_initfn(Object *obj)
 116 {
 117     TriCoreCPU *cpu = TRICORE_CPU(obj);
 118
 119     set_feature(&cpu->env, TRICORE_FEATURE_16);
 120 }
 121
 122 typedef struct TriCoreCPUInfo {
 123     const char *name;
 124     void (*initfn)(Object *obj);
 125     void (*class_init)(ObjectClass *oc, void *data);
 126 } TriCoreCPUInfo;
 127
 128 static const TriCoreCPUInfo tricore_cpus[] = {
 129     { .name = "tc1796",      .initfn = tc1796_initfn },
 130     { .name = "aurix",       .initfn = aurix_initfn },
 131     { .name = NULL }
 132 };
 133
 134 static void tricore_cpu_class_init(ObjectClass *c, void *data)
 135 {
 136     TriCoreCPUClass *mcc = TRICORE_CPU_CLASS(c);
 137     CPUClass *cc = CPU_CLASS(c);
 138     DeviceClass *dc = DEVICE_CLASS(c);
 139
 140     mcc->parent_realize = dc->realize;
 141     dc->realize = tricore_cpu_realizefn;
 142
 143     mcc->parent_reset = cc->reset;
 144     cc->reset = tricore_cpu_reset;
 145     cc->class_by_name = tricore_cpu_class_by_name;
 146     cc->has_work = tricore_cpu_has_work;
 147
 148     cc->dump_state = tricore_cpu_dump_state;
 149     cc->set_pc = tricore_cpu_set_pc;
 150     cc->synchronize_from_tb = tricore_cpu_synchronize_from_tb;
 151
 152 }
 153
 154 static void cpu_register(const TriCoreCPUInfo *info)
 155 {
 156     TypeInfo type_info = {
 157         .parent = TYPE_TRICORE_CPU,
 158         .instance_size = sizeof(TriCoreCPU),
 159         .instance_init = info->initfn,
 160         .class_size = sizeof(TriCoreCPUClass),
 161         .class_init = info->class_init,
 162     };
 163
 164     type_info.name = g_strdup_printf("%s-" TYPE_TRICORE_CPU, info->name);
 165     type_register(&type_info);
 166     g_free((void *)type_info.name);
 167 }
 168
 169 static const TypeInfo tricore_cpu_type_info = {
 170     .name = TYPE_TRICORE_CPU,
 171     .parent = TYPE_CPU,
 172     .instance_size = sizeof(TriCoreCPU),
 173     .instance_init = tricore_cpu_initfn,
 174     .abstract = true,
 175     .class_size = sizeof(TriCoreCPUClass),
 176     .class_init = tricore_cpu_class_init,
 177 };
 178
 179 static void tricore_cpu_register_types(void)
 180 {
 181     const TriCoreCPUInfo *info = tricore_cpus;
 182
 183     type_register_static(&tricore_cpu_type_info);
 184
 185     while (info->name) {
 186         cpu_register(info);
 187         info++;
 188     }
 189 }
 190
 191 type_init(tricore_cpu_register_types)