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    static int inited;
  81
  82    cs->env_ptr = &cpu->env;
  83
  84    if (tcg_enabled() && !inited) {
  85        inited = 1;
  86        moxie_translate_init();
  87    }
  88}
  89
  90static ObjectClass *moxie_cpu_class_by_name(const char *cpu_model)
  91{
  92    ObjectClass *oc;
  93
  94    if (cpu_model == NULL) {
  95        return NULL;
  96    }
  97
  98    oc = object_class_by_name(cpu_model);
  99    if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_MOXIE_CPU) ||
 100                       object_class_is_abstract(oc))) {
 101        return NULL;
 102    }
 103    return oc;
 104}
 105
 106static void moxie_cpu_class_init(ObjectClass *oc, void *data)
 107{
 108    DeviceClass *dc = DEVICE_CLASS(oc);
 109    CPUClass *cc = CPU_CLASS(oc);
 110    MoxieCPUClass *mcc = MOXIE_CPU_CLASS(oc);
 111
 112    mcc->parent_realize = dc->realize;
 113    dc->realize = moxie_cpu_realizefn;
 114
 115    mcc->parent_reset = cc->reset;
 116    cc->reset = moxie_cpu_reset;
 117
 118    cc->class_by_name = moxie_cpu_class_by_name;
 119
 120    cc->has_work = moxie_cpu_has_work;
 121    cc->do_interrupt = moxie_cpu_do_interrupt;
 122    cc->dump_state = moxie_cpu_dump_state;
 123    cc->set_pc = moxie_cpu_set_pc;
 124#ifdef CONFIG_USER_ONLY
 125    cc->handle_mmu_fault = moxie_cpu_handle_mmu_fault;
 126#else
 127    cc->get_phys_page_debug = moxie_cpu_get_phys_page_debug;
 128    cc->vmsd = &vmstate_moxie_cpu;
 129#endif
 130    cc->disas_set_info = moxie_cpu_disas_set_info;
 131}
 132
 133static void moxielite_initfn(Object *obj)
 134{
 135    /* Set cpu feature flags */
 136}
 137
 138static void moxie_any_initfn(Object *obj)
 139{
 140    /* Set cpu feature flags */
 141}
 142
 143typedef struct MoxieCPUInfo {
 144    const char *name;
 145    void (*initfn)(Object *obj);
 146} MoxieCPUInfo;
 147
 148static const MoxieCPUInfo moxie_cpus[] = {
 149    { .name = "MoxieLite",      .initfn = moxielite_initfn },
 150    { .name = "any",            .initfn = moxie_any_initfn },
 151};
 152
 153MoxieCPU *cpu_moxie_init(const char *cpu_model)
 154{
 155    return MOXIE_CPU(cpu_generic_init(TYPE_MOXIE_CPU, cpu_model));
 156}
 157
 158static void cpu_register(const MoxieCPUInfo *info)
 159{
 160    TypeInfo type_info = {
 161        .parent = TYPE_MOXIE_CPU,
 162        .instance_size = sizeof(MoxieCPU),
 163        .instance_init = info->initfn,
 164        .class_size = sizeof(MoxieCPUClass),
 165    };
 166
 167    type_info.name = g_strdup_printf("%s-" TYPE_MOXIE_CPU, info->name);
 168    type_register(&type_info);
 169    g_free((void *)type_info.name);
 170}
 171
 172static const TypeInfo moxie_cpu_type_info = {
 173    .name = TYPE_MOXIE_CPU,
 174    .parent = TYPE_CPU,
 175    .instance_size = sizeof(MoxieCPU),
 176    .instance_init = moxie_cpu_initfn,
 177    .class_size = sizeof(MoxieCPUClass),
 178    .class_init = moxie_cpu_class_init,
 179};
 180
 181static void moxie_cpu_register_types(void)
 182{
 183    int i;
 184    type_register_static(&moxie_cpu_type_info);
 185    for (i = 0; i < ARRAY_SIZE(moxie_cpus); i++) {
 186        cpu_register(&moxie_cpus[i]);
 187    }
 188}
 189
 190type_init(moxie_cpu_register_types)
 191