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/*

 * QEMU UniCore32 CPU

 *

 * Copyright (c) 2010-2012 Guan Xuetao

 * Copyright (c) 2012 SUSE LINUX Products GmbH

 *

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

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 * Contributions from 2012-04-01 on are considered under GPL version 2,

 * or (at your option) any later version.

 */

#include "cpu.h"

#include "qemu-common.h"

#include "migration/vmstate.h"

static inline void set_feature(CPUUniCore32State *env, int feature)

{

    env->features |= feature;

}

/* CPU models */

static ObjectClass *uc32_cpu_class_by_name(const char *cpu_model)

{

    ObjectClass *oc;

    char *typename;

    if (cpu_model == NULL) {

        return NULL;

    }

    typename = g_strdup_printf("%s-" TYPE_UNICORE32_CPU, cpu_model);

    oc = object_class_by_name(typename);

    g_free(typename);

    if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_UNICORE32_CPU) ||

                       object_class_is_abstract(oc))) {

        oc = NULL;

    }

    return oc;

}

typedef struct UniCore32CPUInfo {

    const char *name;

    void (*instance_init)(Object *obj);

} UniCore32CPUInfo;

static void unicore_ii_cpu_initfn(Object *obj)

{

    UniCore32CPU *cpu = UNICORE32_CPU(obj);

    CPUUniCore32State *env = &cpu->env;

    env->cp0.c0_cpuid = 0x4d000863;

    env->cp0.c0_cachetype = 0x0d152152;

    env->cp0.c1_sys = 0x2000;

    env->cp0.c2_base = 0x0;

    env->cp0.c3_faultstatus = 0x0;

    env->cp0.c4_faultaddr = 0x0;

    env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;

    set_feature(env, UC32_HWCAP_CMOV);

    set_feature(env, UC32_HWCAP_UCF64);

}

static void uc32_any_cpu_initfn(Object *obj)

{

    UniCore32CPU *cpu = UNICORE32_CPU(obj);

    CPUUniCore32State *env = &cpu->env;

    env->cp0.c0_cpuid = 0xffffffff;

    env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;

    set_feature(env, UC32_HWCAP_CMOV);

    set_feature(env, UC32_HWCAP_UCF64);

}

static const UniCore32CPUInfo uc32_cpus[] = {

    { .name = "UniCore-II", .instance_init = unicore_ii_cpu_initfn },

    { .name = "any",        .instance_init = uc32_any_cpu_initfn },

};

static void uc32_cpu_realizefn(DeviceState *dev, Error **errp)

{

    UniCore32CPU *cpu = UNICORE32_CPU(dev);

    UniCore32CPUClass *ucc = UNICORE32_CPU_GET_CLASS(dev);

    qemu_init_vcpu(&cpu->env);

    ucc->parent_realize(dev, errp);

}

static void uc32_cpu_initfn(Object *obj)

{

    UniCore32CPU *cpu = UNICORE32_CPU(obj);

    CPUUniCore32State *env = &cpu->env;

    cpu_exec_init(env);

#ifdef CONFIG_USER_ONLY

    env->uncached_asr = ASR_MODE_USER;

    env->regs[31] = 0;

#else

    env->uncached_asr = ASR_MODE_PRIV;

    env->regs[31] = 0x03000000;

#endif

    tlb_flush(env, 1);

}

static const VMStateDescription vmstate_uc32_cpu = {

    .name = "cpu",

    .unmigratable = 1,

};

static void uc32_cpu_class_init(ObjectClass *oc, void *data)

{

    DeviceClass *dc = DEVICE_CLASS(oc);

    CPUClass *cc = CPU_CLASS(oc);

    UniCore32CPUClass *ucc = UNICORE32_CPU_CLASS(oc);

    ucc->parent_realize = dc->realize;

    dc->realize = uc32_cpu_realizefn;

    cc->class_by_name = uc32_cpu_class_by_name;

    dc->vmsd = &vmstate_uc32_cpu;

}

static void uc32_register_cpu_type(const UniCore32CPUInfo *info)

{

    TypeInfo type_info = {

        .parent = TYPE_UNICORE32_CPU,

        .instance_init = info->instance_init,

    };

    type_info.name = g_strdup_printf("%s-" TYPE_UNICORE32_CPU, info->name);

    type_register(&type_info);

    g_free((void *)type_info.name);

}

static const TypeInfo uc32_cpu_type_info = {

    .name = TYPE_UNICORE32_CPU,

    .parent = TYPE_CPU,

    .instance_size = sizeof(UniCore32CPU),

    .instance_init = uc32_cpu_initfn,

    .abstract = true,

    .class_size = sizeof(UniCore32CPUClass),

    .class_init = uc32_cpu_class_init,

};

static void uc32_cpu_register_types(void)

{

    int i;

    type_register_static(&uc32_cpu_type_info);

    for (i = 0; i < ARRAY_SIZE(uc32_cpus); i++) {

        uc32_register_cpu_type(&uc32_cpus[i]);

    }

}

type_init(uc32_cpu_register_types)