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 "qemu/osdep.h"
  21 #include "cpu.h"
  22 #include "qemu-common.h"
  23
  24 static inline void set_feature(CPUTriCoreState *env, int feature)
  25 {
  26     env->features |= 1ULL << feature;
  27 }
  28
  29 static void tricore_cpu_set_pc(CPUState *cs, vaddr value)
  30 {
  31     TriCoreCPU *cpu = TRICORE_CPU(cs);
  32     CPUTriCoreState *env = &cpu->env;
  33
  34     env->PC = value & ~(target_ulong)1;
  35 }
  36
  37 static void tricore_cpu_synchronize_from_tb(CPUState *cs,
  38                                             TranslationBlock *tb)
  39 {
  40     TriCoreCPU *cpu = TRICORE_CPU(cs);
  41     CPUTriCoreState *env = &cpu->env;
  42
  43     env->PC = tb->pc;
  44 }
  45
  46 static void tricore_cpu_reset(CPUState *s)
  47 {
  48     TriCoreCPU *cpu = TRICORE_CPU(s);
  49     TriCoreCPUClass *tcc = TRICORE_CPU_GET_CLASS(cpu);
  50     CPUTriCoreState *env = &cpu->env;
  51
  52     tcc->parent_reset(s);
  53
  54     tlb_flush(s, 1);
  55
  56     cpu_state_reset(env);
  57 }
  58
  59 static bool tricore_cpu_has_work(CPUState *cs)
  60 {
  61     return true;
  62 }
  63
  64 static void tricore_cpu_realizefn(DeviceState *dev, Error **errp)
  65 {
  66     CPUState *cs = CPU(dev);
  67     TriCoreCPU *cpu = TRICORE_CPU(dev);
  68     TriCoreCPUClass *tcc = TRICORE_CPU_GET_CLASS(dev);
  69     CPUTriCoreState *env = &cpu->env;
  70
  71     /* Some features automatically imply others */
  72     if (tricore_feature(env, TRICORE_FEATURE_161)) {
  73         set_feature(env, TRICORE_FEATURE_16);
  74     }
  75
  76     if (tricore_feature(env, TRICORE_FEATURE_16)) {
  77         set_feature(env, TRICORE_FEATURE_131);
  78     }
  79     if (tricore_feature(env, TRICORE_FEATURE_131)) {
  80         set_feature(env, TRICORE_FEATURE_13);
  81     }
  82     cpu_reset(cs);
  83     qemu_init_vcpu(cs);
  84
  85     tcc->parent_realize(dev, errp);
  86 }
  87
  88
  89 static void tricore_cpu_initfn(Object *obj)
  90 {
  91     CPUState *cs = CPU(obj);
  92     TriCoreCPU *cpu = TRICORE_CPU(obj);
  93     CPUTriCoreState *env = &cpu->env;
  94
  95     cs->env_ptr = env;
  96     cpu_exec_init(cs, &error_abort);
  97
  98     if (tcg_enabled()) {
  99         tricore_tcg_init();
 100     }
 101 }
 102
 103 static ObjectClass *tricore_cpu_class_by_name(const char *cpu_model)
 104 {
 105     ObjectClass *oc;
 106     char *typename;
 107
 108     if (!cpu_model) {
 109         return NULL;
 110     }
 111
 112     typename = g_strdup_printf("%s-" TYPE_TRICORE_CPU, cpu_model);
 113     oc = object_class_by_name(typename);
 114     g_free(typename);
 115     if (!oc || !object_class_dynamic_cast(oc, TYPE_TRICORE_CPU) ||
 116         object_class_is_abstract(oc)) {
 117         return NULL;
 118     }
 119     return oc;
 120 }
 121
 122 static void tc1796_initfn(Object *obj)
 123 {
 124     TriCoreCPU *cpu = TRICORE_CPU(obj);
 125
 126     set_feature(&cpu->env, TRICORE_FEATURE_13);
 127 }
 128
 129 static void tc1797_initfn(Object *obj)
 130 {
 131     TriCoreCPU *cpu = TRICORE_CPU(obj);
 132
 133     set_feature(&cpu->env, TRICORE_FEATURE_131);
 134 }
 135
 136 static void tc27x_initfn(Object *obj)
 137 {
 138     TriCoreCPU *cpu = TRICORE_CPU(obj);
 139
 140     set_feature(&cpu->env, TRICORE_FEATURE_161);
 141 }
 142
 143 typedef struct TriCoreCPUInfo {
 144     const char *name;
 145     void (*initfn)(Object *obj);
 146     void (*class_init)(ObjectClass *oc, void *data);
 147 } TriCoreCPUInfo;
 148
 149 static const TriCoreCPUInfo tricore_cpus[] = {
 150     { .name = "tc1796",      .initfn = tc1796_initfn },
 151     { .name = "tc1797",      .initfn = tc1797_initfn },
 152     { .name = "tc27x",       .initfn = tc27x_initfn },
 153     { .name = NULL }
 154 };
 155
 156 static void tricore_cpu_class_init(ObjectClass *c, void *data)
 157 {
 158     TriCoreCPUClass *mcc = TRICORE_CPU_CLASS(c);
 159     CPUClass *cc = CPU_CLASS(c);
 160     DeviceClass *dc = DEVICE_CLASS(c);
 161
 162     mcc->parent_realize = dc->realize;
 163     dc->realize = tricore_cpu_realizefn;
 164
 165     mcc->parent_reset = cc->reset;
 166     cc->reset = tricore_cpu_reset;
 167     cc->class_by_name = tricore_cpu_class_by_name;
 168     cc->has_work = tricore_cpu_has_work;
 169
 170     cc->dump_state = tricore_cpu_dump_state;
 171     cc->set_pc = tricore_cpu_set_pc;
 172     cc->synchronize_from_tb = tricore_cpu_synchronize_from_tb;
 173
 174     /*
 175      * Reason: tricore_cpu_initfn() calls cpu_exec_init(), which saves
 176      * the object in cpus -> dangling pointer after final
 177      * object_unref().
 178      */
 179     dc->cannot_destroy_with_object_finalize_yet = true;
 180 }
 181
 182 static void cpu_register(const TriCoreCPUInfo *info)
 183 {
 184     TypeInfo type_info = {
 185         .parent = TYPE_TRICORE_CPU,
 186         .instance_size = sizeof(TriCoreCPU),
 187         .instance_init = info->initfn,
 188         .class_size = sizeof(TriCoreCPUClass),
 189         .class_init = info->class_init,
 190     };
 191
 192     type_info.name = g_strdup_printf("%s-" TYPE_TRICORE_CPU, info->name);
 193     type_register(&type_info);
 194     g_free((void *)type_info.name);
 195 }
 196
 197 static const TypeInfo tricore_cpu_type_info = {
 198     .name = TYPE_TRICORE_CPU,
 199     .parent = TYPE_CPU,
 200     .instance_size = sizeof(TriCoreCPU),
 201     .instance_init = tricore_cpu_initfn,
 202     .abstract = true,
 203     .class_size = sizeof(TriCoreCPUClass),
 204     .class_init = tricore_cpu_class_init,
 205 };
 206
 207 static void tricore_cpu_register_types(void)
 208 {
 209     const TriCoreCPUInfo *info = tricore_cpus;
 210
 211     type_register_static(&tricore_cpu_type_info);
 212
 213     while (info->name) {
 214         cpu_register(info);
 215         info++;
 216     }
 217 }
 218
 219 type_init(tricore_cpu_register_types)