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