Archipelago » qemu

/*

 * QEMU Moxie CPU

 *

 * Copyright (c) 2013 Anthony Green

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

 */

#include "cpu.h"

#include "qemu-common.h"

#include "migration/vmstate.h"

#include "machine.h"

static void moxie_cpu_set_pc(CPUState *cs, vaddr value)

{

    MoxieCPU *cpu = MOXIE_CPU(cs);

    cpu->env.pc = value;

}

static void moxie_cpu_reset(CPUState *s)

{

    MoxieCPU *cpu = MOXIE_CPU(s);

    MoxieCPUClass *mcc = MOXIE_CPU_GET_CLASS(cpu);

    CPUMoxieState *env = &cpu->env;

    mcc->parent_reset(s);

    memset(env, 0, offsetof(CPUMoxieState, breakpoints));

    env->pc = 0x1000;

    tlb_flush(env, 1);

}

static void moxie_cpu_realizefn(DeviceState *dev, Error **errp)

{

    CPUState *cs = CPU(dev);

    MoxieCPUClass *mcc = MOXIE_CPU_GET_CLASS(dev);

    qemu_init_vcpu(cs);

    cpu_reset(cs);

    mcc->parent_realize(dev, errp);

}

static void moxie_cpu_initfn(Object *obj)

{

    CPUState *cs = CPU(obj);

    MoxieCPU *cpu = MOXIE_CPU(obj);

    static int inited;

    cs->env_ptr = &cpu->env;

    cpu_exec_init(&cpu->env);

    if (tcg_enabled() && !inited) {

        inited = 1;

        moxie_translate_init();

    }

}

static ObjectClass *moxie_cpu_class_by_name(const char *cpu_model)

{

    ObjectClass *oc;

    if (cpu_model == NULL) {

        return NULL;

    }

    oc = object_class_by_name(cpu_model);

    if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_MOXIE_CPU) ||

                       object_class_is_abstract(oc))) {

        return NULL;

    }

    return oc;

}

static void moxie_cpu_class_init(ObjectClass *oc, void *data)

{

    DeviceClass *dc = DEVICE_CLASS(oc);

    CPUClass *cc = CPU_CLASS(oc);

    MoxieCPUClass *mcc = MOXIE_CPU_CLASS(oc);

    mcc->parent_realize = dc->realize;

    dc->realize = moxie_cpu_realizefn;

    mcc->parent_reset = cc->reset;

    cc->reset = moxie_cpu_reset;

    cc->class_by_name = moxie_cpu_class_by_name;

    cc->do_interrupt = moxie_cpu_do_interrupt;

    cc->dump_state = moxie_cpu_dump_state;

    cc->set_pc = moxie_cpu_set_pc;

#ifndef CONFIG_USER_ONLY

    cc->get_phys_page_debug = moxie_cpu_get_phys_page_debug;

    cc->vmsd = &vmstate_moxie_cpu;

#endif

}

static void moxielite_initfn(Object *obj)

{

    /* Set cpu feature flags */

}

static void moxie_any_initfn(Object *obj)

{

    /* Set cpu feature flags */

}

typedef struct MoxieCPUInfo {

    const char *name;

    void (*initfn)(Object *obj);

} MoxieCPUInfo;

static const MoxieCPUInfo moxie_cpus[] = {

    { .name = "MoxieLite",      .initfn = moxielite_initfn },

    { .name = "any",            .initfn = moxie_any_initfn },

};

MoxieCPU *cpu_moxie_init(const char *cpu_model)

{

    MoxieCPU *cpu;

    ObjectClass *oc;

    oc = moxie_cpu_class_by_name(cpu_model);

    if (oc == NULL) {

        return NULL;

    }

    cpu = MOXIE_CPU(object_new(object_class_get_name(oc)));

    cpu->env.cpu_model_str = cpu_model;

    object_property_set_bool(OBJECT(cpu), true, "realized", NULL);

    return cpu;

}

static void cpu_register(const MoxieCPUInfo *info)

{

    TypeInfo type_info = {

        .parent = TYPE_MOXIE_CPU,

        .instance_size = sizeof(MoxieCPU),

        .instance_init = info->initfn,

        .class_size = sizeof(MoxieCPUClass),

    };

    type_info.name = g_strdup_printf("%s-" TYPE_MOXIE_CPU, info->name);

    type_register(&type_info);

    g_free((void *)type_info.name);

}

static const TypeInfo moxie_cpu_type_info = {

    .name = TYPE_MOXIE_CPU,

    .parent = TYPE_CPU,

    .instance_size = sizeof(MoxieCPU),

    .instance_init = moxie_cpu_initfn,

    .class_size = sizeof(MoxieCPUClass),

    .class_init = moxie_cpu_class_init,

};

static void moxie_cpu_register_types(void)

{

    int i;

    type_register_static(&moxie_cpu_type_info);

    for (i = 0; i < ARRAY_SIZE(moxie_cpus); i++) {

        cpu_register(&moxie_cpus[i]);

    }

}

type_init(moxie_cpu_register_types)