Archipelago » qemu

/*

 * QEMU IDE Emulation: mmio support (for embedded).

 *

 * Copyright (c) 2003 Fabrice Bellard

 * Copyright (c) 2006 Openedhand Ltd.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 */

#include <hw/hw.h>

#include "block.h"

#include "block_int.h"

#include "sysemu.h"

#include "dma.h"

#include <hw/ide/internal.h>

/***********************************************************/

/* MMIO based ide port

 * This emulates IDE device connected directly to the CPU bus without

 * dedicated ide controller, which is often seen on embedded boards.

 */

typedef struct {

    IDEBus bus;

    int shift;

} MMIOState;

static void mmio_ide_reset(void *opaque)

{

    MMIOState *s = opaque;

    ide_bus_reset(&s->bus);

}

static uint32_t mmio_ide_read (void *opaque, target_phys_addr_t addr)

{

    MMIOState *s = opaque;

    addr >>= s->shift;

    if (addr & 7)

        return ide_ioport_read(&s->bus, addr);

    else

        return ide_data_readw(&s->bus, 0);

}

static void mmio_ide_write (void *opaque, target_phys_addr_t addr,

        uint32_t val)

{

    MMIOState *s = opaque;

    addr >>= s->shift;

    if (addr & 7)

        ide_ioport_write(&s->bus, addr, val);

    else

        ide_data_writew(&s->bus, 0, val);

}

static CPUReadMemoryFunc * const mmio_ide_reads[] = {

    mmio_ide_read,

    mmio_ide_read,

    mmio_ide_read,

};

static CPUWriteMemoryFunc * const mmio_ide_writes[] = {

    mmio_ide_write,

    mmio_ide_write,

    mmio_ide_write,

};

static uint32_t mmio_ide_status_read (void *opaque, target_phys_addr_t addr)

{

    MMIOState *s= opaque;

    return ide_status_read(&s->bus, 0);

}

static void mmio_ide_cmd_write (void *opaque, target_phys_addr_t addr,

        uint32_t val)

{

    MMIOState *s = opaque;

    ide_cmd_write(&s->bus, 0, val);

}

static CPUReadMemoryFunc * const mmio_ide_status[] = {

    mmio_ide_status_read,

    mmio_ide_status_read,

    mmio_ide_status_read,

};

static CPUWriteMemoryFunc * const mmio_ide_cmd[] = {

    mmio_ide_cmd_write,

    mmio_ide_cmd_write,

    mmio_ide_cmd_write,

};

static const VMStateDescription vmstate_ide_mmio = {

    .name = "mmio-ide",

    .version_id = 3,

    .minimum_version_id = 0,

    .minimum_version_id_old = 0,

    .fields      = (VMStateField []) {

        VMSTATE_IDE_BUS(bus, MMIOState),

        VMSTATE_IDE_DRIVES(bus.ifs, MMIOState),

        VMSTATE_END_OF_LIST()

    }

};

void mmio_ide_init (target_phys_addr_t membase, target_phys_addr_t membase2,

                    qemu_irq irq, int shift,

                    DriveInfo *hd0, DriveInfo *hd1)

{

    MMIOState *s = qemu_mallocz(sizeof(MMIOState));

    int mem1, mem2;

    ide_init2(&s->bus, hd0, hd1, irq);

    s->shift = shift;

    mem1 = cpu_register_io_memory(mmio_ide_reads, mmio_ide_writes, s);

    mem2 = cpu_register_io_memory(mmio_ide_status, mmio_ide_cmd, s);

    cpu_register_physical_memory(membase, 16 << shift, mem1);

    cpu_register_physical_memory(membase2, 2 << shift, mem2);

    vmstate_register(0, &vmstate_ide_mmio, s);

    qemu_register_reset(mmio_ide_reset, s);

}