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 #include "tcg/debug-assert.h"
  26
  27 static inline void set_feature(CPUTriCoreState *env, int feature)
  28 {
  29     env->features |= 1ULL << feature;
  30 }
  31
  32 static const gchar *tricore_gdb_arch_name(CPUState *cs)
  33 {
  34     return "tricore";
  35 }
  36
  37 static void tricore_cpu_set_pc(CPUState *cs, vaddr value)
  38 {
  39     TriCoreCPU *cpu = TRICORE_CPU(cs);
  40     CPUTriCoreState *env = &cpu->env;
  41
  42     env->PC = value & ~(target_ulong)1;
  43 }
  44
  45 static vaddr tricore_cpu_get_pc(CPUState *cs)
  46 {
  47     TriCoreCPU *cpu = TRICORE_CPU(cs);
  48     CPUTriCoreState *env = &cpu->env;
  49
  50     return env->PC;
  51 }
  52
  53 static void tricore_cpu_synchronize_from_tb(CPUState *cs,
  54                                             const TranslationBlock *tb)
  55 {
  56     TriCoreCPU *cpu = TRICORE_CPU(cs);
  57     CPUTriCoreState *env = &cpu->env;
  58
  59     tcg_debug_assert(!(cs->tcg_cflags & CF_PCREL));
  60     env->PC = tb->pc;
  61 }
  62
  63 static void tricore_restore_state_to_opc(CPUState *cs,
  64                                          const TranslationBlock *tb,
  65                                          const uint64_t *data)
  66 {
  67     TriCoreCPU *cpu = TRICORE_CPU(cs);
  68     CPUTriCoreState *env = &cpu->env;
  69
  70     env->PC = data[0];
  71 }
  72
  73 static void tricore_cpu_reset_hold(Object *obj)
  74 {
  75     CPUState *s = CPU(obj);
  76     TriCoreCPU *cpu = TRICORE_CPU(s);
  77     TriCoreCPUClass *tcc = TRICORE_CPU_GET_CLASS(cpu);
  78     CPUTriCoreState *env = &cpu->env;
  79
  80     if (tcc->parent_phases.hold) {
  81         tcc->parent_phases.hold(obj);
  82     }
  83
  84     cpu_state_reset(env);
  85 }
  86
  87 static bool tricore_cpu_has_work(CPUState *cs)
  88 {
  89     return true;
  90 }
  91
  92 static void tricore_cpu_realizefn(DeviceState *dev, Error **errp)
  93 {
  94     CPUState *cs = CPU(dev);
  95     TriCoreCPU *cpu = TRICORE_CPU(dev);
  96     TriCoreCPUClass *tcc = TRICORE_CPU_GET_CLASS(dev);
  97     CPUTriCoreState *env = &cpu->env;
  98     Error *local_err = NULL;
  99
 100     cpu_exec_realizefn(cs, &local_err);
 101     if (local_err != NULL) {
 102         error_propagate(errp, local_err);
 103         return;
 104     }
 105
 106     /* Some features automatically imply others */
 107     if (tricore_has_feature(env, TRICORE_FEATURE_162)) {
 108         set_feature(env, TRICORE_FEATURE_161);
 109     }
 110
 111     if (tricore_has_feature(env, TRICORE_FEATURE_161)) {
 112         set_feature(env, TRICORE_FEATURE_16);
 113     }
 114
 115     if (tricore_has_feature(env, TRICORE_FEATURE_16)) {
 116         set_feature(env, TRICORE_FEATURE_131);
 117     }
 118     if (tricore_has_feature(env, TRICORE_FEATURE_131)) {
 119         set_feature(env, TRICORE_FEATURE_13);
 120     }
 121     cpu_reset(cs);
 122     qemu_init_vcpu(cs);
 123
 124     tcc->parent_realize(dev, errp);
 125 }
 126
 127 static ObjectClass *tricore_cpu_class_by_name(const char *cpu_model)
 128 {
 129     ObjectClass *oc;
 130     char *typename;
 131
 132     typename = g_strdup_printf(TRICORE_CPU_TYPE_NAME("%s"), cpu_model);
 133     oc = object_class_by_name(typename);
 134     g_free(typename);
 135     if (!oc || !object_class_dynamic_cast(oc, TYPE_TRICORE_CPU) ||
 136         object_class_is_abstract(oc)) {
 137         return NULL;
 138     }
 139     return oc;
 140 }
 141
 142 static void tc1796_initfn(Object *obj)
 143 {
 144     TriCoreCPU *cpu = TRICORE_CPU(obj);
 145
 146     set_feature(&cpu->env, TRICORE_FEATURE_13);
 147 }
 148
 149 static void tc1797_initfn(Object *obj)
 150 {
 151     TriCoreCPU *cpu = TRICORE_CPU(obj);
 152
 153     set_feature(&cpu->env, TRICORE_FEATURE_131);
 154 }
 155
 156 static void tc27x_initfn(Object *obj)
 157 {
 158     TriCoreCPU *cpu = TRICORE_CPU(obj);
 159
 160     set_feature(&cpu->env, TRICORE_FEATURE_161);
 161 }
 162
 163 static void tc37x_initfn(Object *obj)
 164 {
 165     TriCoreCPU *cpu = TRICORE_CPU(obj);
 166
 167     set_feature(&cpu->env, TRICORE_FEATURE_162);
 168 }
 169
 170
 171 #include "hw/core/sysemu-cpu-ops.h"
 172
 173 static const struct SysemuCPUOps tricore_sysemu_ops = {
 174     .get_phys_page_debug = tricore_cpu_get_phys_page_debug,
 175 };
 176
 177 #include "hw/core/tcg-cpu-ops.h"
 178
 179 static const struct TCGCPUOps tricore_tcg_ops = {
 180     .initialize = tricore_tcg_init,
 181     .synchronize_from_tb = tricore_cpu_synchronize_from_tb,
 182     .restore_state_to_opc = tricore_restore_state_to_opc,
 183     .tlb_fill = tricore_cpu_tlb_fill,
 184 };
 185
 186 static void tricore_cpu_class_init(ObjectClass *c, void *data)
 187 {
 188     TriCoreCPUClass *mcc = TRICORE_CPU_CLASS(c);
 189     CPUClass *cc = CPU_CLASS(c);
 190     DeviceClass *dc = DEVICE_CLASS(c);
 191     ResettableClass *rc = RESETTABLE_CLASS(c);
 192
 193     device_class_set_parent_realize(dc, tricore_cpu_realizefn,
 194                                     &mcc->parent_realize);
 195
 196     resettable_class_set_parent_phases(rc, NULL, tricore_cpu_reset_hold, NULL,
 197                                        &mcc->parent_phases);
 198     cc->class_by_name = tricore_cpu_class_by_name;
 199     cc->has_work = tricore_cpu_has_work;
 200
 201     cc->gdb_read_register = tricore_cpu_gdb_read_register;
 202     cc->gdb_write_register = tricore_cpu_gdb_write_register;
 203     cc->gdb_num_core_regs = 44;
 204     cc->gdb_arch_name = tricore_gdb_arch_name;
 205
 206     cc->dump_state = tricore_cpu_dump_state;
 207     cc->set_pc = tricore_cpu_set_pc;
 208     cc->get_pc = tricore_cpu_get_pc;
 209     cc->sysemu_ops = &tricore_sysemu_ops;
 210     cc->tcg_ops = &tricore_tcg_ops;
 211 }
 212
 213 #define DEFINE_TRICORE_CPU_TYPE(cpu_model, initfn) \
 214     {                                              \
 215         .parent = TYPE_TRICORE_CPU,                \
 216         .instance_init = initfn,                   \
 217         .name = TRICORE_CPU_TYPE_NAME(cpu_model),  \
 218     }
 219
 220 static const TypeInfo tricore_cpu_type_infos[] = {
 221     {
 222         .name = TYPE_TRICORE_CPU,
 223         .parent = TYPE_CPU,
 224         .instance_size = sizeof(TriCoreCPU),
 225         .instance_align = __alignof(TriCoreCPU),
 226         .abstract = true,
 227         .class_size = sizeof(TriCoreCPUClass),
 228         .class_init = tricore_cpu_class_init,
 229     },
 230     DEFINE_TRICORE_CPU_TYPE("tc1796", tc1796_initfn),
 231     DEFINE_TRICORE_CPU_TYPE("tc1797", tc1797_initfn),
 232     DEFINE_TRICORE_CPU_TYPE("tc27x", tc27x_initfn),
 233     DEFINE_TRICORE_CPU_TYPE("tc37x", tc37x_initfn),
 234 };
 235
 236 DEFINE_TYPES(tricore_cpu_type_infos)