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 2.1 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 "exec/exec-all.h"
  24 #include "qemu/error-report.h"
  25
  26 static inline void set_feature(CPUTriCoreState *env, int feature)
  27 {
  28     env->features |= 1ULL << feature;
  29 }
  30
  31 static gchar *tricore_gdb_arch_name(CPUState *cs)
  32 {
  33     return g_strdup("tricore");
  34 }
  35
  36 static void tricore_cpu_set_pc(CPUState *cs, vaddr value)
  37 {
  38     TriCoreCPU *cpu = TRICORE_CPU(cs);
  39     CPUTriCoreState *env = &cpu->env;
  40
  41     env->PC = value & ~(target_ulong)1;
  42 }
  43
  44 static vaddr tricore_cpu_get_pc(CPUState *cs)
  45 {
  46     TriCoreCPU *cpu = TRICORE_CPU(cs);
  47     CPUTriCoreState *env = &cpu->env;
  48
  49     return env->PC;
  50 }
  51
  52 static void tricore_cpu_synchronize_from_tb(CPUState *cs,
  53                                             const TranslationBlock *tb)
  54 {
  55     TriCoreCPU *cpu = TRICORE_CPU(cs);
  56     CPUTriCoreState *env = &cpu->env;
  57
  58     env->PC = tb_pc(tb);
  59 }
  60
  61 static void tricore_restore_state_to_opc(CPUState *cs,
  62                                          const TranslationBlock *tb,
  63                                          const uint64_t *data)
  64 {
  65     TriCoreCPU *cpu = TRICORE_CPU(cs);
  66     CPUTriCoreState *env = &cpu->env;
  67
  68     env->PC = data[0];
  69 }
  70
  71 static void tricore_cpu_reset_hold(Object *obj)
  72 {
  73     CPUState *s = CPU(obj);
  74     TriCoreCPU *cpu = TRICORE_CPU(s);
  75     TriCoreCPUClass *tcc = TRICORE_CPU_GET_CLASS(cpu);
  76     CPUTriCoreState *env = &cpu->env;
  77
  78     if (tcc->parent_phases.hold) {
  79         tcc->parent_phases.hold(obj);
  80     }
  81
  82     cpu_state_reset(env);
  83 }
  84
  85 static bool tricore_cpu_has_work(CPUState *cs)
  86 {
  87     return true;
  88 }
  89
  90 static void tricore_cpu_realizefn(DeviceState *dev, Error **errp)
  91 {
  92     CPUState *cs = CPU(dev);
  93     TriCoreCPU *cpu = TRICORE_CPU(dev);
  94     TriCoreCPUClass *tcc = TRICORE_CPU_GET_CLASS(dev);
  95     CPUTriCoreState *env = &cpu->env;
  96     Error *local_err = NULL;
  97
  98     cpu_exec_realizefn(cs, &local_err);
  99     if (local_err != NULL) {
 100         error_propagate(errp, local_err);
 101         return;
 102     }
 103
 104     /* Some features automatically imply others */
 105     if (tricore_feature(env, TRICORE_FEATURE_161)) {
 106         set_feature(env, TRICORE_FEATURE_16);
 107     }
 108
 109     if (tricore_feature(env, TRICORE_FEATURE_16)) {
 110         set_feature(env, TRICORE_FEATURE_131);
 111     }
 112     if (tricore_feature(env, TRICORE_FEATURE_131)) {
 113         set_feature(env, TRICORE_FEATURE_13);
 114     }
 115     cpu_reset(cs);
 116     qemu_init_vcpu(cs);
 117
 118     tcc->parent_realize(dev, errp);
 119 }
 120
 121
 122 static void tricore_cpu_initfn(Object *obj)
 123 {
 124     TriCoreCPU *cpu = TRICORE_CPU(obj);
 125
 126     cpu_set_cpustate_pointers(cpu);
 127 }
 128
 129 static ObjectClass *tricore_cpu_class_by_name(const char *cpu_model)
 130 {
 131     ObjectClass *oc;
 132     char *typename;
 133
 134     typename = g_strdup_printf(TRICORE_CPU_TYPE_NAME("%s"), cpu_model);
 135     oc = object_class_by_name(typename);
 136     g_free(typename);
 137     if (!oc || !object_class_dynamic_cast(oc, TYPE_TRICORE_CPU) ||
 138         object_class_is_abstract(oc)) {
 139         return NULL;
 140     }
 141     return oc;
 142 }
 143
 144 static void tc1796_initfn(Object *obj)
 145 {
 146     TriCoreCPU *cpu = TRICORE_CPU(obj);
 147
 148     set_feature(&cpu->env, TRICORE_FEATURE_13);
 149 }
 150
 151 static void tc1797_initfn(Object *obj)
 152 {
 153     TriCoreCPU *cpu = TRICORE_CPU(obj);
 154
 155     set_feature(&cpu->env, TRICORE_FEATURE_131);
 156 }
 157
 158 static void tc27x_initfn(Object *obj)
 159 {
 160     TriCoreCPU *cpu = TRICORE_CPU(obj);
 161
 162     set_feature(&cpu->env, TRICORE_FEATURE_161);
 163 }
 164
 165 #include "hw/core/sysemu-cpu-ops.h"
 166
 167 static const struct SysemuCPUOps tricore_sysemu_ops = {
 168     .get_phys_page_debug = tricore_cpu_get_phys_page_debug,
 169 };
 170
 171 #include "hw/core/tcg-cpu-ops.h"
 172
 173 static const struct TCGCPUOps tricore_tcg_ops = {
 174     .initialize = tricore_tcg_init,
 175     .synchronize_from_tb = tricore_cpu_synchronize_from_tb,
 176     .restore_state_to_opc = tricore_restore_state_to_opc,
 177     .tlb_fill = tricore_cpu_tlb_fill,
 178 };
 179
 180 static void tricore_cpu_class_init(ObjectClass *c, void *data)
 181 {
 182     TriCoreCPUClass *mcc = TRICORE_CPU_CLASS(c);
 183     CPUClass *cc = CPU_CLASS(c);
 184     DeviceClass *dc = DEVICE_CLASS(c);
 185     ResettableClass *rc = RESETTABLE_CLASS(c);
 186
 187     device_class_set_parent_realize(dc, tricore_cpu_realizefn,
 188                                     &mcc->parent_realize);
 189
 190     resettable_class_set_parent_phases(rc, NULL, tricore_cpu_reset_hold, NULL,
 191                                        &mcc->parent_phases);
 192     cc->class_by_name = tricore_cpu_class_by_name;
 193     cc->has_work = tricore_cpu_has_work;
 194
 195     cc->gdb_read_register = tricore_cpu_gdb_read_register;
 196     cc->gdb_write_register = tricore_cpu_gdb_write_register;
 197     cc->gdb_num_core_regs = 44;
 198     cc->gdb_arch_name = tricore_gdb_arch_name;
 199
 200     cc->dump_state = tricore_cpu_dump_state;
 201     cc->set_pc = tricore_cpu_set_pc;
 202     cc->get_pc = tricore_cpu_get_pc;
 203     cc->sysemu_ops = &tricore_sysemu_ops;
 204     cc->tcg_ops = &tricore_tcg_ops;
 205 }
 206
 207 #define DEFINE_TRICORE_CPU_TYPE(cpu_model, initfn) \
 208     {                                              \
 209         .parent = TYPE_TRICORE_CPU,                \
 210         .instance_init = initfn,                   \
 211         .name = TRICORE_CPU_TYPE_NAME(cpu_model),  \
 212     }
 213
 214 static const TypeInfo tricore_cpu_type_infos[] = {
 215     {
 216         .name = TYPE_TRICORE_CPU,
 217         .parent = TYPE_CPU,
 218         .instance_size = sizeof(TriCoreCPU),
 219         .instance_init = tricore_cpu_initfn,
 220         .abstract = true,
 221         .class_size = sizeof(TriCoreCPUClass),
 222         .class_init = tricore_cpu_class_init,
 223     },
 224     DEFINE_TRICORE_CPU_TYPE("tc1796", tc1796_initfn),
 225     DEFINE_TRICORE_CPU_TYPE("tc1797", tc1797_initfn),
 226     DEFINE_TRICORE_CPU_TYPE("tc27x", tc27x_initfn),
 227 };
 228
 229 DEFINE_TYPES(tricore_cpu_type_infos)