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