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 Lesser General Public License
  17  * along with this program.  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 "migration/vmstate.h"
  24 #include "machine.h"
  25
  26 static void moxie_cpu_set_pc(CPUState *cs, vaddr value)
  27 {
  28     MoxieCPU *cpu = MOXIE_CPU(cs);
  29
  30     cpu->env.pc = value;
  31 }
  32
  33 static bool moxie_cpu_has_work(CPUState *cs)
  34 {
  35     return cs->interrupt_request & CPU_INTERRUPT_HARD;
  36 }
  37
  38 static void moxie_cpu_reset(DeviceState *dev)
  39 {
  40     CPUState *s = CPU(dev);
  41     MoxieCPU *cpu = MOXIE_CPU(s);
  42     MoxieCPUClass *mcc = MOXIE_CPU_GET_CLASS(cpu);
  43     CPUMoxieState *env = &cpu->env;
  44
  45     mcc->parent_reset(dev);
  46
  47     memset(env, 0, offsetof(CPUMoxieState, end_reset_fields));
  48     env->pc = 0x1000;
  49 }
  50
  51 static void moxie_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
  52 {
  53     info->mach = bfd_arch_moxie;
  54     info->print_insn = print_insn_moxie;
  55 }
  56
  57 static void moxie_cpu_realizefn(DeviceState *dev, Error **errp)
  58 {
  59     CPUState *cs = CPU(dev);
  60     MoxieCPUClass *mcc = MOXIE_CPU_GET_CLASS(dev);
  61     Error *local_err = NULL;
  62
  63     cpu_exec_realizefn(cs, &local_err);
  64     if (local_err != NULL) {
  65         error_propagate(errp, local_err);
  66         return;
  67     }
  68
  69     qemu_init_vcpu(cs);
  70     cpu_reset(cs);
  71
  72     mcc->parent_realize(dev, errp);
  73 }
  74
  75 static void moxie_cpu_initfn(Object *obj)
  76 {
  77     MoxieCPU *cpu = MOXIE_CPU(obj);
  78
  79     cpu_set_cpustate_pointers(cpu);
  80 }
  81
  82 static ObjectClass *moxie_cpu_class_by_name(const char *cpu_model)
  83 {
  84     ObjectClass *oc;
  85     char *typename;
  86
  87     typename = g_strdup_printf(MOXIE_CPU_TYPE_NAME("%s"), cpu_model);
  88     oc = object_class_by_name(typename);
  89     g_free(typename);
  90     if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_MOXIE_CPU) ||
  91                        object_class_is_abstract(oc))) {
  92         return NULL;
  93     }
  94     return oc;
  95 }
  96
  97 #include "hw/core/tcg-cpu-ops.h"
  98
  99 static struct TCGCPUOps moxie_tcg_ops = {
 100     .initialize = moxie_translate_init,
 101     .tlb_fill = moxie_cpu_tlb_fill,
 102
 103 #ifndef CONFIG_USER_ONLY
 104     .do_interrupt = moxie_cpu_do_interrupt,
 105 #endif /* !CONFIG_USER_ONLY */
 106 };
 107
 108 static void moxie_cpu_class_init(ObjectClass *oc, void *data)
 109 {
 110     DeviceClass *dc = DEVICE_CLASS(oc);
 111     CPUClass *cc = CPU_CLASS(oc);
 112     MoxieCPUClass *mcc = MOXIE_CPU_CLASS(oc);
 113
 114     device_class_set_parent_realize(dc, moxie_cpu_realizefn,
 115                                     &mcc->parent_realize);
 116     device_class_set_parent_reset(dc, moxie_cpu_reset, &mcc->parent_reset);
 117
 118     cc->class_by_name = moxie_cpu_class_by_name;
 119
 120     cc->has_work = moxie_cpu_has_work;
 121     cc->dump_state = moxie_cpu_dump_state;
 122     cc->set_pc = moxie_cpu_set_pc;
 123 #ifndef CONFIG_USER_ONLY
 124     cc->get_phys_page_debug = moxie_cpu_get_phys_page_debug;
 125     cc->vmsd = &vmstate_moxie_cpu;
 126 #endif
 127     cc->disas_set_info = moxie_cpu_disas_set_info;
 128     cc->tcg_ops = &moxie_tcg_ops;
 129 }
 130
 131 static void moxielite_initfn(Object *obj)
 132 {
 133     /* Set cpu feature flags */
 134 }
 135
 136 static void moxie_any_initfn(Object *obj)
 137 {
 138     /* Set cpu feature flags */
 139 }
 140
 141 #define DEFINE_MOXIE_CPU_TYPE(cpu_model, initfn) \
 142     {                                            \
 143         .parent = TYPE_MOXIE_CPU,                \
 144         .instance_init = initfn,                 \
 145         .name = MOXIE_CPU_TYPE_NAME(cpu_model),  \
 146     }
 147
 148 static const TypeInfo moxie_cpus_type_infos[] = {
 149     { /* base class should be registered first */
 150         .name = TYPE_MOXIE_CPU,
 151         .parent = TYPE_CPU,
 152         .instance_size = sizeof(MoxieCPU),
 153         .instance_init = moxie_cpu_initfn,
 154         .class_size = sizeof(MoxieCPUClass),
 155         .class_init = moxie_cpu_class_init,
 156     },
 157     DEFINE_MOXIE_CPU_TYPE("MoxieLite", moxielite_initfn),
 158     DEFINE_MOXIE_CPU_TYPE("any", moxie_any_initfn),
 159 };
 160
 161 DEFINE_TYPES(moxie_cpus_type_infos)