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 void tricore_cpu_synchronize_from_tb(CPUState *cs,
  45                                             TranslationBlock *tb)
  46 {
  47     TriCoreCPU *cpu = TRICORE_CPU(cs);
  48     CPUTriCoreState *env = &cpu->env;
  49
  50     env->PC = tb->pc;
  51 }
  52
  53 static void tricore_cpu_reset(DeviceState *dev)
  54 {
  55     CPUState *s = CPU(dev);
  56     TriCoreCPU *cpu = TRICORE_CPU(s);
  57     TriCoreCPUClass *tcc = TRICORE_CPU_GET_CLASS(cpu);
  58     CPUTriCoreState *env = &cpu->env;
  59
  60     tcc->parent_reset(dev);
  61
  62     cpu_state_reset(env);
  63 }
  64
  65 static bool tricore_cpu_has_work(CPUState *cs)
  66 {
  67     return true;
  68 }
  69
  70 static void tricore_cpu_realizefn(DeviceState *dev, Error **errp)
  71 {
  72     CPUState *cs = CPU(dev);
  73     TriCoreCPU *cpu = TRICORE_CPU(dev);
  74     TriCoreCPUClass *tcc = TRICORE_CPU_GET_CLASS(dev);
  75     CPUTriCoreState *env = &cpu->env;
  76     Error *local_err = NULL;
  77
  78     cpu_exec_realizefn(cs, &local_err);
  79     if (local_err != NULL) {
  80         error_propagate(errp, local_err);
  81         return;
  82     }
  83
  84     /* Some features automatically imply others */
  85     if (tricore_feature(env, TRICORE_FEATURE_161)) {
  86         set_feature(env, TRICORE_FEATURE_16);
  87     }
  88
  89     if (tricore_feature(env, TRICORE_FEATURE_16)) {
  90         set_feature(env, TRICORE_FEATURE_131);
  91     }
  92     if (tricore_feature(env, TRICORE_FEATURE_131)) {
  93         set_feature(env, TRICORE_FEATURE_13);
  94     }
  95     cpu_reset(cs);
  96     qemu_init_vcpu(cs);
  97
  98     tcc->parent_realize(dev, errp);
  99 }
 100
 101
 102 static void tricore_cpu_initfn(Object *obj)
 103 {
 104     TriCoreCPU *cpu = TRICORE_CPU(obj);
 105
 106     cpu_set_cpustate_pointers(cpu);
 107 }
 108
 109 static ObjectClass *tricore_cpu_class_by_name(const char *cpu_model)
 110 {
 111     ObjectClass *oc;
 112     char *typename;
 113
 114     typename = g_strdup_printf(TRICORE_CPU_TYPE_NAME("%s"), cpu_model);
 115     oc = object_class_by_name(typename);
 116     g_free(typename);
 117     if (!oc || !object_class_dynamic_cast(oc, TYPE_TRICORE_CPU) ||
 118         object_class_is_abstract(oc)) {
 119         return NULL;
 120     }
 121     return oc;
 122 }
 123
 124 static void tc1796_initfn(Object *obj)
 125 {
 126     TriCoreCPU *cpu = TRICORE_CPU(obj);
 127
 128     set_feature(&cpu->env, TRICORE_FEATURE_13);
 129 }
 130
 131 static void tc1797_initfn(Object *obj)
 132 {
 133     TriCoreCPU *cpu = TRICORE_CPU(obj);
 134
 135     set_feature(&cpu->env, TRICORE_FEATURE_131);
 136 }
 137
 138 static void tc27x_initfn(Object *obj)
 139 {
 140     TriCoreCPU *cpu = TRICORE_CPU(obj);
 141
 142     set_feature(&cpu->env, TRICORE_FEATURE_161);
 143 }
 144
 145 static void tricore_cpu_class_init(ObjectClass *c, void *data)
 146 {
 147     TriCoreCPUClass *mcc = TRICORE_CPU_CLASS(c);
 148     CPUClass *cc = CPU_CLASS(c);
 149     DeviceClass *dc = DEVICE_CLASS(c);
 150
 151     device_class_set_parent_realize(dc, tricore_cpu_realizefn,
 152                                     &mcc->parent_realize);
 153
 154     device_class_set_parent_reset(dc, tricore_cpu_reset, &mcc->parent_reset);
 155     cc->class_by_name = tricore_cpu_class_by_name;
 156     cc->has_work = tricore_cpu_has_work;
 157
 158     cc->gdb_read_register = tricore_cpu_gdb_read_register;
 159     cc->gdb_write_register = tricore_cpu_gdb_write_register;
 160     cc->gdb_num_core_regs = 44;
 161     cc->gdb_arch_name = tricore_gdb_arch_name;
 162
 163     cc->dump_state = tricore_cpu_dump_state;
 164     cc->set_pc = tricore_cpu_set_pc;
 165     cc->synchronize_from_tb = tricore_cpu_synchronize_from_tb;
 166     cc->get_phys_page_debug = tricore_cpu_get_phys_page_debug;
 167     cc->tcg_initialize = tricore_tcg_init;
 168     cc->tlb_fill = tricore_cpu_tlb_fill;
 169 }
 170
 171 #define DEFINE_TRICORE_CPU_TYPE(cpu_model, initfn) \
 172     {                                              \
 173         .parent = TYPE_TRICORE_CPU,                \
 174         .instance_init = initfn,                   \
 175         .name = TRICORE_CPU_TYPE_NAME(cpu_model),  \
 176     }
 177
 178 static const TypeInfo tricore_cpu_type_infos[] = {
 179     {
 180         .name = TYPE_TRICORE_CPU,
 181         .parent = TYPE_CPU,
 182         .instance_size = sizeof(TriCoreCPU),
 183         .instance_init = tricore_cpu_initfn,
 184         .abstract = true,
 185         .class_size = sizeof(TriCoreCPUClass),
 186         .class_init = tricore_cpu_class_init,
 187     },
 188     DEFINE_TRICORE_CPU_TYPE("tc1796", tc1796_initfn),
 189     DEFINE_TRICORE_CPU_TYPE("tc1797", tc1797_initfn),
 190     DEFINE_TRICORE_CPU_TYPE("tc27x", tc27x_initfn),
 191 };
 192
 193 DEFINE_TYPES(tricore_cpu_type_infos)