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 #include "qemu/error-report.h"
  26
  27 static hwaddr tricore_cpu_get_phys_page_attrs_debug(CPUState *cpu, vaddr addr,
  28                                          MemTxAttrs *attrs)
  29 {
  30     error_report("function cpu_get_phys_page_attrs_debug not "
  31                     "implemented, aborting");
  32     return -1;
  33 }
  34
  35 static inline void set_feature(CPUTriCoreState *env, int feature)
  36 {
  37     env->features |= 1ULL << feature;
  38 }
  39
  40 static void tricore_cpu_set_pc(CPUState *cs, vaddr value)
  41 {
  42     TriCoreCPU *cpu = TRICORE_CPU(cs);
  43     CPUTriCoreState *env = &cpu->env;
  44
  45     env->PC = value & ~(target_ulong)1;
  46 }
  47
  48 static void tricore_cpu_synchronize_from_tb(CPUState *cs,
  49                                             TranslationBlock *tb)
  50 {
  51     TriCoreCPU *cpu = TRICORE_CPU(cs);
  52     CPUTriCoreState *env = &cpu->env;
  53
  54     env->PC = tb->pc;
  55 }
  56
  57 static void tricore_cpu_reset(CPUState *s)
  58 {
  59     TriCoreCPU *cpu = TRICORE_CPU(s);
  60     TriCoreCPUClass *tcc = TRICORE_CPU_GET_CLASS(cpu);
  61     CPUTriCoreState *env = &cpu->env;
  62
  63     tcc->parent_reset(s);
  64
  65     cpu_state_reset(env);
  66 }
  67
  68 static bool tricore_cpu_has_work(CPUState *cs)
  69 {
  70     return true;
  71 }
  72
  73 static void tricore_cpu_realizefn(DeviceState *dev, Error **errp)
  74 {
  75     CPUState *cs = CPU(dev);
  76     TriCoreCPU *cpu = TRICORE_CPU(dev);
  77     TriCoreCPUClass *tcc = TRICORE_CPU_GET_CLASS(dev);
  78     CPUTriCoreState *env = &cpu->env;
  79     Error *local_err = NULL;
  80
  81     cpu_exec_realizefn(cs, &local_err);
  82     if (local_err != NULL) {
  83         error_propagate(errp, local_err);
  84         return;
  85     }
  86
  87     /* Some features automatically imply others */
  88     if (tricore_feature(env, TRICORE_FEATURE_161)) {
  89         set_feature(env, TRICORE_FEATURE_16);
  90     }
  91
  92     if (tricore_feature(env, TRICORE_FEATURE_16)) {
  93         set_feature(env, TRICORE_FEATURE_131);
  94     }
  95     if (tricore_feature(env, TRICORE_FEATURE_131)) {
  96         set_feature(env, TRICORE_FEATURE_13);
  97     }
  98     cpu_reset(cs);
  99     qemu_init_vcpu(cs);
 100
 101     tcc->parent_realize(dev, errp);
 102 }
 103
 104
 105 static void tricore_cpu_initfn(Object *obj)
 106 {
 107     CPUState *cs = CPU(obj);
 108     TriCoreCPU *cpu = TRICORE_CPU(obj);
 109     CPUTriCoreState *env = &cpu->env;
 110
 111     cs->env_ptr = env;
 112
 113     if (tcg_enabled()) {
 114         tricore_tcg_init();
 115     }
 116 }
 117
 118 static ObjectClass *tricore_cpu_class_by_name(const char *cpu_model)
 119 {
 120     ObjectClass *oc;
 121     char *typename;
 122
 123     if (!cpu_model) {
 124         return NULL;
 125     }
 126
 127     typename = g_strdup_printf("%s-" TYPE_TRICORE_CPU, cpu_model);
 128     oc = object_class_by_name(typename);
 129     g_free(typename);
 130     if (!oc || !object_class_dynamic_cast(oc, TYPE_TRICORE_CPU) ||
 131         object_class_is_abstract(oc)) {
 132         return NULL;
 133     }
 134     return oc;
 135 }
 136
 137 static void tc1796_initfn(Object *obj)
 138 {
 139     TriCoreCPU *cpu = TRICORE_CPU(obj);
 140
 141     set_feature(&cpu->env, TRICORE_FEATURE_13);
 142 }
 143
 144 static void tc1797_initfn(Object *obj)
 145 {
 146     TriCoreCPU *cpu = TRICORE_CPU(obj);
 147
 148     set_feature(&cpu->env, TRICORE_FEATURE_131);
 149 }
 150
 151 static void tc27x_initfn(Object *obj)
 152 {
 153     TriCoreCPU *cpu = TRICORE_CPU(obj);
 154
 155     set_feature(&cpu->env, TRICORE_FEATURE_161);
 156 }
 157
 158 typedef struct TriCoreCPUInfo {
 159     const char *name;
 160     void (*initfn)(Object *obj);
 161     void (*class_init)(ObjectClass *oc, void *data);
 162 } TriCoreCPUInfo;
 163
 164 static const TriCoreCPUInfo tricore_cpus[] = {
 165     { .name = "tc1796",      .initfn = tc1796_initfn },
 166     { .name = "tc1797",      .initfn = tc1797_initfn },
 167     { .name = "tc27x",       .initfn = tc27x_initfn },
 168     { .name = NULL }
 169 };
 170
 171 static void tricore_cpu_class_init(ObjectClass *c, void *data)
 172 {
 173     TriCoreCPUClass *mcc = TRICORE_CPU_CLASS(c);
 174     CPUClass *cc = CPU_CLASS(c);
 175     DeviceClass *dc = DEVICE_CLASS(c);
 176
 177     mcc->parent_realize = dc->realize;
 178     dc->realize = tricore_cpu_realizefn;
 179
 180     mcc->parent_reset = cc->reset;
 181     cc->reset = tricore_cpu_reset;
 182     cc->class_by_name = tricore_cpu_class_by_name;
 183     cc->has_work = tricore_cpu_has_work;
 184
 185     cc->dump_state = tricore_cpu_dump_state;
 186     cc->set_pc = tricore_cpu_set_pc;
 187     cc->synchronize_from_tb = tricore_cpu_synchronize_from_tb;
 188     cc->get_phys_page_attrs_debug = tricore_cpu_get_phys_page_attrs_debug;
 189 }
 190
 191 static void cpu_register(const TriCoreCPUInfo *info)
 192 {
 193     TypeInfo type_info = {
 194         .parent = TYPE_TRICORE_CPU,
 195         .instance_size = sizeof(TriCoreCPU),
 196         .instance_init = info->initfn,
 197         .class_size = sizeof(TriCoreCPUClass),
 198         .class_init = info->class_init,
 199     };
 200
 201     type_info.name = g_strdup_printf("%s-" TYPE_TRICORE_CPU, info->name);
 202     type_register(&type_info);
 203     g_free((void *)type_info.name);
 204 }
 205
 206 static const TypeInfo tricore_cpu_type_info = {
 207     .name = TYPE_TRICORE_CPU,
 208     .parent = TYPE_CPU,
 209     .instance_size = sizeof(TriCoreCPU),
 210     .instance_init = tricore_cpu_initfn,
 211     .abstract = true,
 212     .class_size = sizeof(TriCoreCPUClass),
 213     .class_init = tricore_cpu_class_init,
 214 };
 215
 216 static void tricore_cpu_register_types(void)
 217 {
 218     const TriCoreCPUInfo *info = tricore_cpus;
 219
 220     type_register_static(&tricore_cpu_type_info);
 221
 222     while (info->name) {
 223         cpu_register(info);
 224         info++;
 225     }
 226 }
 227
 228 type_init(tricore_cpu_register_types)