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
 114 static ObjectClass *tricore_cpu_class_by_name(const char *cpu_model)
 115 {
 116     ObjectClass *oc;
 117     char *typename;
 118
 119     typename = g_strdup_printf("%s-" TYPE_TRICORE_CPU, cpu_model);
 120     oc = object_class_by_name(typename);
 121     g_free(typename);
 122     if (!oc || !object_class_dynamic_cast(oc, TYPE_TRICORE_CPU) ||
 123         object_class_is_abstract(oc)) {
 124         return NULL;
 125     }
 126     return oc;
 127 }
 128
 129 static void tc1796_initfn(Object *obj)
 130 {
 131     TriCoreCPU *cpu = TRICORE_CPU(obj);
 132
 133     set_feature(&cpu->env, TRICORE_FEATURE_13);
 134 }
 135
 136 static void tc1797_initfn(Object *obj)
 137 {
 138     TriCoreCPU *cpu = TRICORE_CPU(obj);
 139
 140     set_feature(&cpu->env, TRICORE_FEATURE_131);
 141 }
 142
 143 static void tc27x_initfn(Object *obj)
 144 {
 145     TriCoreCPU *cpu = TRICORE_CPU(obj);
 146
 147     set_feature(&cpu->env, TRICORE_FEATURE_161);
 148 }
 149
 150 typedef struct TriCoreCPUInfo {
 151     const char *name;
 152     void (*initfn)(Object *obj);
 153     void (*class_init)(ObjectClass *oc, void *data);
 154 } TriCoreCPUInfo;
 155
 156 static const TriCoreCPUInfo tricore_cpus[] = {
 157     { .name = "tc1796",      .initfn = tc1796_initfn },
 158     { .name = "tc1797",      .initfn = tc1797_initfn },
 159     { .name = "tc27x",       .initfn = tc27x_initfn },
 160     { .name = NULL }
 161 };
 162
 163 static void tricore_cpu_class_init(ObjectClass *c, void *data)
 164 {
 165     TriCoreCPUClass *mcc = TRICORE_CPU_CLASS(c);
 166     CPUClass *cc = CPU_CLASS(c);
 167     DeviceClass *dc = DEVICE_CLASS(c);
 168
 169     mcc->parent_realize = dc->realize;
 170     dc->realize = tricore_cpu_realizefn;
 171
 172     mcc->parent_reset = cc->reset;
 173     cc->reset = tricore_cpu_reset;
 174     cc->class_by_name = tricore_cpu_class_by_name;
 175     cc->has_work = tricore_cpu_has_work;
 176
 177     cc->dump_state = tricore_cpu_dump_state;
 178     cc->set_pc = tricore_cpu_set_pc;
 179     cc->synchronize_from_tb = tricore_cpu_synchronize_from_tb;
 180     cc->get_phys_page_attrs_debug = tricore_cpu_get_phys_page_attrs_debug;
 181     cc->tcg_initialize = tricore_tcg_init;
 182 }
 183
 184 static void cpu_register(const TriCoreCPUInfo *info)
 185 {
 186     TypeInfo type_info = {
 187         .parent = TYPE_TRICORE_CPU,
 188         .instance_size = sizeof(TriCoreCPU),
 189         .instance_init = info->initfn,
 190         .class_size = sizeof(TriCoreCPUClass),
 191         .class_init = info->class_init,
 192     };
 193
 194     type_info.name = g_strdup_printf("%s-" TYPE_TRICORE_CPU, info->name);
 195     type_register(&type_info);
 196     g_free((void *)type_info.name);
 197 }
 198
 199 static const TypeInfo tricore_cpu_type_info = {
 200     .name = TYPE_TRICORE_CPU,
 201     .parent = TYPE_CPU,
 202     .instance_size = sizeof(TriCoreCPU),
 203     .instance_init = tricore_cpu_initfn,
 204     .abstract = true,
 205     .class_size = sizeof(TriCoreCPUClass),
 206     .class_init = tricore_cpu_class_init,
 207 };
 208
 209 static void tricore_cpu_register_types(void)
 210 {
 211     const TriCoreCPUInfo *info = tricore_cpus;
 212
 213     type_register_static(&tricore_cpu_type_info);
 214
 215     while (info->name) {
 216         cpu_register(info);
 217         info++;
 218     }
 219 }
 220
 221 type_init(tricore_cpu_register_types)