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/*

 * QEMU PowerPC MPC8544 global util pseudo-device

 *

 * Copyright (C) 2011 Freescale Semiconductor, Inc. All rights reserved.

 *

 * Author: Alexander Graf, <alex@csgraf.de>

 *

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

 * it under the terms of  the GNU General  Public License as published by

 * the Free Software Foundation;  either version 2 of the  License, or

 * (at your option) any later version.

 *

 * *****************************************************************

 *

 * The documentation for this device is noted in the MPC8544 documentation,

 * file name "MPC8544ERM.pdf". You can easily find it on the web.

 *

 */

#include "hw/hw.h"

#include "sysemu/sysemu.h"

#include "hw/sysbus.h"

#define MPC8544_GUTS_MMIO_SIZE        0x1000

#define MPC8544_GUTS_RSTCR_RESET      0x02

#define MPC8544_GUTS_ADDR_PORPLLSR    0x00

#define MPC8544_GUTS_ADDR_PORBMSR     0x04

#define MPC8544_GUTS_ADDR_PORIMPSCR   0x08

#define MPC8544_GUTS_ADDR_PORDEVSR    0x0C

#define MPC8544_GUTS_ADDR_PORDBGMSR   0x10

#define MPC8544_GUTS_ADDR_PORDEVSR2   0x14

#define MPC8544_GUTS_ADDR_GPPORCR     0x20

#define MPC8544_GUTS_ADDR_GPIOCR      0x30

#define MPC8544_GUTS_ADDR_GPOUTDR     0x40

#define MPC8544_GUTS_ADDR_GPINDR      0x50

#define MPC8544_GUTS_ADDR_PMUXCR      0x60

#define MPC8544_GUTS_ADDR_DEVDISR     0x70

#define MPC8544_GUTS_ADDR_POWMGTCSR   0x80

#define MPC8544_GUTS_ADDR_MCPSUMR     0x90

#define MPC8544_GUTS_ADDR_RSTRSCR     0x94

#define MPC8544_GUTS_ADDR_PVR         0xA0

#define MPC8544_GUTS_ADDR_SVR         0xA4

#define MPC8544_GUTS_ADDR_RSTCR       0xB0

#define MPC8544_GUTS_ADDR_IOVSELSR    0xC0

#define MPC8544_GUTS_ADDR_DDRCSR      0xB20

#define MPC8544_GUTS_ADDR_DDRCDR      0xB24

#define MPC8544_GUTS_ADDR_DDRCLKDR    0xB28

#define MPC8544_GUTS_ADDR_CLKOCR      0xE00

#define MPC8544_GUTS_ADDR_SRDS1CR1    0xF04

#define MPC8544_GUTS_ADDR_SRDS2CR1    0xF10

#define MPC8544_GUTS_ADDR_SRDS2CR3    0xF18

#define TYPE_MPC8544_GUTS "mpc8544-guts"

#define MPC8544_GUTS(obj) OBJECT_CHECK(GutsState, (obj), TYPE_MPC8544_GUTS)

struct GutsState {

    /*< private >*/

    SysBusDevice parent_obj;

    /*< public >*/

    MemoryRegion iomem;

};

typedef struct GutsState GutsState;

static uint64_t mpc8544_guts_read(void *opaque, hwaddr addr,

                                  unsigned size)

{

    uint32_t value = 0;

    PowerPCCPU *cpu = POWERPC_CPU(current_cpu);

    CPUPPCState *env = &cpu->env;

    addr &= MPC8544_GUTS_MMIO_SIZE - 1;

    switch (addr) {

    case MPC8544_GUTS_ADDR_PVR:

        value = env->spr[SPR_PVR];

        break;

    case MPC8544_GUTS_ADDR_SVR:

        value = env->spr[SPR_E500_SVR];

        break;

    default:

        fprintf(stderr, "guts: Unknown register read: %x\n", (int)addr);

        break;

    }

    return value;

}

static void mpc8544_guts_write(void *opaque, hwaddr addr,

                               uint64_t value, unsigned size)

{

    addr &= MPC8544_GUTS_MMIO_SIZE - 1;

    switch (addr) {

    case MPC8544_GUTS_ADDR_RSTCR:

        if (value & MPC8544_GUTS_RSTCR_RESET) {

            qemu_system_reset_request();

        }

        break;

    default:

        fprintf(stderr, "guts: Unknown register write: %x = %x\n",

                (int)addr, (unsigned)value);

        break;

    }

}

static const MemoryRegionOps mpc8544_guts_ops = {

    .read = mpc8544_guts_read,

    .write = mpc8544_guts_write,

    .endianness = DEVICE_BIG_ENDIAN,

    .valid = {

        .min_access_size = 4,

        .max_access_size = 4,

    },

};

static void mpc8544_guts_initfn(Object *obj)

{

    SysBusDevice *d = SYS_BUS_DEVICE(obj);

    GutsState *s = MPC8544_GUTS(obj);

    memory_region_init_io(&s->iomem, OBJECT(s), &mpc8544_guts_ops, s,

                          "mpc8544.guts", MPC8544_GUTS_MMIO_SIZE);

    sysbus_init_mmio(d, &s->iomem);

}

static const TypeInfo mpc8544_guts_info = {

    .name          = TYPE_MPC8544_GUTS,

    .parent        = TYPE_SYS_BUS_DEVICE,

    .instance_size = sizeof(GutsState),

    .instance_init = mpc8544_guts_initfn,

};

static void mpc8544_guts_register_types(void)

{

    type_register_static(&mpc8544_guts_info);

}

type_init(mpc8544_guts_register_types)