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