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