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     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     Error *local_err = NULL;
  71
  72     cpu_exec_realizefn(cs, &local_err);
  73     if (local_err != NULL) {
  74         error_propagate(errp, local_err);
  75         return;
  76     }
  77
  78     /* Some features automatically imply others */
  79     if (tricore_feature(env, TRICORE_FEATURE_161)) {
  80         set_feature(env, TRICORE_FEATURE_16);
  81     }
  82
  83     if (tricore_feature(env, TRICORE_FEATURE_16)) {
  84         set_feature(env, TRICORE_FEATURE_131);
  85     }
  86     if (tricore_feature(env, TRICORE_FEATURE_131)) {
  87         set_feature(env, TRICORE_FEATURE_13);
  88     }
  89     cpu_reset(cs);
  90     qemu_init_vcpu(cs);
  91
  92     tcc->parent_realize(dev, errp);
  93 }
  94
  95
  96 static void tricore_cpu_initfn(Object *obj)
  97 {
  98     CPUState *cs = CPU(obj);
  99     TriCoreCPU *cpu = TRICORE_CPU(obj);
 100     CPUTriCoreState *env = &cpu->env;
 101
 102     cs->env_ptr = env;
 103
 104     if (tcg_enabled()) {
 105         tricore_tcg_init();
 106     }
 107 }
 108
 109 static ObjectClass *tricore_cpu_class_by_name(const char *cpu_model)
 110 {
 111     ObjectClass *oc;
 112     char *typename;
 113
 114     if (!cpu_model) {
 115         return NULL;
 116     }
 117
 118     typename = g_strdup_printf("%s-" TYPE_TRICORE_CPU, cpu_model);
 119     oc = object_class_by_name(typename);
 120     g_free(typename);
 121     if (!oc || !object_class_dynamic_cast(oc, TYPE_TRICORE_CPU) ||
 122         object_class_is_abstract(oc)) {
 123         return NULL;
 124     }
 125     return oc;
 126 }
 127
 128 static void tc1796_initfn(Object *obj)
 129 {
 130     TriCoreCPU *cpu = TRICORE_CPU(obj);
 131
 132     set_feature(&cpu->env, TRICORE_FEATURE_13);
 133 }
 134
 135 static void tc1797_initfn(Object *obj)
 136 {
 137     TriCoreCPU *cpu = TRICORE_CPU(obj);
 138
 139     set_feature(&cpu->env, TRICORE_FEATURE_131);
 140 }
 141
 142 static void tc27x_initfn(Object *obj)
 143 {
 144     TriCoreCPU *cpu = TRICORE_CPU(obj);
 145
 146     set_feature(&cpu->env, TRICORE_FEATURE_161);
 147 }
 148
 149 typedef struct TriCoreCPUInfo {
 150     const char *name;
 151     void (*initfn)(Object *obj);
 152     void (*class_init)(ObjectClass *oc, void *data);
 153 } TriCoreCPUInfo;
 154
 155 static const TriCoreCPUInfo tricore_cpus[] = {
 156     { .name = "tc1796",      .initfn = tc1796_initfn },
 157     { .name = "tc1797",      .initfn = tc1797_initfn },
 158     { .name = "tc27x",       .initfn = tc27x_initfn },
 159     { .name = NULL }
 160 };
 161
 162 static void tricore_cpu_class_init(ObjectClass *c, void *data)
 163 {
 164     TriCoreCPUClass *mcc = TRICORE_CPU_CLASS(c);
 165     CPUClass *cc = CPU_CLASS(c);
 166     DeviceClass *dc = DEVICE_CLASS(c);
 167
 168     mcc->parent_realize = dc->realize;
 169     dc->realize = tricore_cpu_realizefn;
 170
 171     mcc->parent_reset = cc->reset;
 172     cc->reset = tricore_cpu_reset;
 173     cc->class_by_name = tricore_cpu_class_by_name;
 174     cc->has_work = tricore_cpu_has_work;
 175
 176     cc->dump_state = tricore_cpu_dump_state;
 177     cc->set_pc = tricore_cpu_set_pc;
 178     cc->synchronize_from_tb = tricore_cpu_synchronize_from_tb;
 179 }
 180
 181 static void cpu_register(const TriCoreCPUInfo *info)
 182 {
 183     TypeInfo type_info = {
 184         .parent = TYPE_TRICORE_CPU,
 185         .instance_size = sizeof(TriCoreCPU),
 186         .instance_init = info->initfn,
 187         .class_size = sizeof(TriCoreCPUClass),
 188         .class_init = info->class_init,
 189     };
 190
 191     type_info.name = g_strdup_printf("%s-" TYPE_TRICORE_CPU, info->name);
 192     type_register(&type_info);
 193     g_free((void *)type_info.name);
 194 }
 195
 196 static const TypeInfo tricore_cpu_type_info = {
 197     .name = TYPE_TRICORE_CPU,
 198     .parent = TYPE_CPU,
 199     .instance_size = sizeof(TriCoreCPU),
 200     .instance_init = tricore_cpu_initfn,
 201     .abstract = true,
 202     .class_size = sizeof(TriCoreCPUClass),
 203     .class_init = tricore_cpu_class_init,
 204 };
 205
 206 static void tricore_cpu_register_types(void)
 207 {
 208     const TriCoreCPUInfo *info = tricore_cpus;
 209
 210     type_register_static(&tricore_cpu_type_info);
 211
 212     while (info->name) {
 213         cpu_register(info);
 214         info++;
 215     }
 216 }
 217
 218 type_init(tricore_cpu_register_types)