target-moxie/cpu.c

   1 /*
   2  * QEMU Moxie CPU
   3  *
   4  * Copyright (c) 2013 Anthony Green
   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 General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "cpu.h"
  21 #include "qemu-common.h"
  22 #include "migration/vmstate.h"
  23 #include "machine.h"
  24
  25 static void moxie_cpu_reset(CPUState *s)
  26 {
  27     MoxieCPU *cpu = MOXIE_CPU(s);
  28     MoxieCPUClass *mcc = MOXIE_CPU_GET_CLASS(cpu);
  29     CPUMoxieState *env = &cpu->env;
  30
  31     if (qemu_loglevel_mask(CPU_LOG_RESET)) {
  32         qemu_log("CPU Reset (CPU %d)\n", s->cpu_index);
  33         log_cpu_state(s, 0);
  34     }
  35
  36     mcc->parent_reset(s);
  37
  38     memset(env, 0, offsetof(CPUMoxieState, breakpoints));
  39     env->pc = 0x1000;
  40
  41     tlb_flush(env, 1);
  42 }
  43
  44 static void moxie_cpu_realizefn(DeviceState *dev, Error **errp)
  45 {
  46     MoxieCPU *cpu = MOXIE_CPU(dev);
  47     MoxieCPUClass *mcc = MOXIE_CPU_GET_CLASS(dev);
  48
  49     cpu_reset(CPU(cpu));
  50
  51     mcc->parent_realize(dev, errp);
  52 }
  53
  54 static void moxie_cpu_initfn(Object *obj)
  55 {
  56     CPUState *cs = CPU(obj);
  57     MoxieCPU *cpu = MOXIE_CPU(obj);
  58     static int inited;
  59
  60     cs->env_ptr = &cpu->env;
  61     cpu_exec_init(&cpu->env);
  62
  63     if (tcg_enabled() && !inited) {
  64         inited = 1;
  65         moxie_translate_init();
  66     }
  67 }
  68
  69 static ObjectClass *moxie_cpu_class_by_name(const char *cpu_model)
  70 {
  71     ObjectClass *oc;
  72
  73     if (cpu_model == NULL) {
  74         return NULL;
  75     }
  76
  77     oc = object_class_by_name(cpu_model);
  78     if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_MOXIE_CPU) ||
  79                        object_class_is_abstract(oc))) {
  80         return NULL;
  81     }
  82     return oc;
  83 }
  84
  85 static void moxie_cpu_class_init(ObjectClass *oc, void *data)
  86 {
  87     DeviceClass *dc = DEVICE_CLASS(oc);
  88     CPUClass *cc = CPU_CLASS(oc);
  89     MoxieCPUClass *mcc = MOXIE_CPU_CLASS(oc);
  90
  91     mcc->parent_realize = dc->realize;
  92     dc->realize = moxie_cpu_realizefn;
  93
  94     mcc->parent_reset = cc->reset;
  95     cc->reset = moxie_cpu_reset;
  96
  97     cc->class_by_name = moxie_cpu_class_by_name;
  98
  99     cc->do_interrupt = moxie_cpu_do_interrupt;
 100     cc->dump_state = moxie_cpu_dump_state;
 101     cpu_class_set_vmsd(cc, &vmstate_moxie_cpu);
 102 }
 103
 104 static void moxielite_initfn(Object *obj)
 105 {
 106     /* Set cpu feature flags */
 107 }
 108
 109 static void moxie_any_initfn(Object *obj)
 110 {
 111     /* Set cpu feature flags */
 112 }
 113
 114 typedef struct MoxieCPUInfo {
 115     const char *name;
 116     void (*initfn)(Object *obj);
 117 } MoxieCPUInfo;
 118
 119 static const MoxieCPUInfo moxie_cpus[] = {
 120     { .name = "MoxieLite",      .initfn = moxielite_initfn },
 121     { .name = "any",            .initfn = moxie_any_initfn },
 122 };
 123
 124 MoxieCPU *cpu_moxie_init(const char *cpu_model)
 125 {
 126     MoxieCPU *cpu;
 127     ObjectClass *oc;
 128
 129     oc = moxie_cpu_class_by_name(cpu_model);
 130     if (oc == NULL) {
 131         return NULL;
 132     }
 133     cpu = MOXIE_CPU(object_new(object_class_get_name(oc)));
 134     cpu->env.cpu_model_str = cpu_model;
 135
 136     object_property_set_bool(OBJECT(cpu), true, "realized", NULL);
 137
 138     return cpu;
 139 }
 140
 141 static void cpu_register(const MoxieCPUInfo *info)
 142 {
 143     TypeInfo type_info = {
 144         .parent = TYPE_MOXIE_CPU,
 145         .instance_size = sizeof(MoxieCPU),
 146         .instance_init = info->initfn,
 147         .class_size = sizeof(MoxieCPUClass),
 148     };
 149
 150     type_info.name = g_strdup_printf("%s-" TYPE_MOXIE_CPU, info->name);
 151     type_register(&type_info);
 152     g_free((void *)type_info.name);
 153 }
 154
 155 static const TypeInfo moxie_cpu_type_info = {
 156     .name = TYPE_MOXIE_CPU,
 157     .parent = TYPE_CPU,
 158     .instance_size = sizeof(MoxieCPU),
 159     .instance_init = moxie_cpu_initfn,
 160     .class_size = sizeof(MoxieCPUClass),
 161     .class_init = moxie_cpu_class_init,
 162 };
 163
 164 static void moxie_cpu_register_types(void)
 165 {
 166     int i;
 167     type_register_static(&moxie_cpu_type_info);
 168     for (i = 0; i < ARRAY_SIZE(moxie_cpus); i++) {
 169         cpu_register(&moxie_cpus[i]);
 170     }
 171 }
 172
 173 type_init(moxie_cpu_register_types)