Archipelago » qemu

/*

 * QEMU IDE Emulation: MacIO support.

 *

 * 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 <hw/ppc_mac.h>

#include <hw/mac_dbdma.h>

#include "block.h"

#include "block_int.h"

#include "sysemu.h"

#include "dma.h"

#include <hw/ide/internal.h>

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

/* MacIO based PowerPC IDE */

typedef struct MACIOIDEState {

    IDEBus bus;

    BlockDriverAIOCB *aiocb;

} MACIOIDEState;

#define MACIO_PAGE_SIZE 4096

static void pmac_ide_atapi_transfer_cb(void *opaque, int ret)

{

    DBDMA_io *io = opaque;

    MACIOIDEState *m = io->opaque;

    IDEState *s = idebus_active_if(&m->bus);

    if (ret < 0) {

        m->aiocb = NULL;

        qemu_sglist_destroy(&s->sg);

        ide_atapi_io_error(s, ret);

        io->dma_end(opaque);

        return;

    }

    if (s->io_buffer_size > 0) {

        m->aiocb = NULL;

        qemu_sglist_destroy(&s->sg);

        s->packet_transfer_size -= s->io_buffer_size;

        s->io_buffer_index += s->io_buffer_size;

        s->lba += s->io_buffer_index >> 11;

        s->io_buffer_index &= 0x7ff;

    }

    if (s->packet_transfer_size <= 0)

        ide_atapi_cmd_ok(s);

    if (io->len == 0) {

        io->dma_end(opaque);

        return;

    }

    /* launch next transfer */

    s->io_buffer_size = io->len;

    qemu_sglist_init(&s->sg, io->len / MACIO_PAGE_SIZE + 1);

    qemu_sglist_add(&s->sg, io->addr, io->len);

    io->addr += io->len;

    io->len = 0;

    m->aiocb = dma_bdrv_read(s->bs, &s->sg,

                             (int64_t)(s->lba << 2) + (s->io_buffer_index >> 9),

                             pmac_ide_atapi_transfer_cb, io);

    if (!m->aiocb) {

        qemu_sglist_destroy(&s->sg);

        /* Note: media not present is the most likely case */

        ide_atapi_cmd_error(s, SENSE_NOT_READY,

                            ASC_MEDIUM_NOT_PRESENT);

        io->dma_end(opaque);

        return;

    }

}

static void pmac_ide_transfer_cb(void *opaque, int ret)

{

    DBDMA_io *io = opaque;

    MACIOIDEState *m = io->opaque;

    IDEState *s = idebus_active_if(&m->bus);

    int n;

    int64_t sector_num;

    if (ret < 0) {

        m->aiocb = NULL;

        qemu_sglist_destroy(&s->sg);

        ide_dma_error(s);

        io->dma_end(io);

        return;

    }

    sector_num = ide_get_sector(s);

    if (s->io_buffer_size > 0) {

        m->aiocb = NULL;

        qemu_sglist_destroy(&s->sg);

        n = (s->io_buffer_size + 0x1ff) >> 9;

        sector_num += n;

        ide_set_sector(s, sector_num);

        s->nsector -= n;

    }

    /* end of transfer ? */

    if (s->nsector == 0) {

        s->status = READY_STAT | SEEK_STAT;

        ide_set_irq(s->bus);

    }

    /* end of DMA ? */

    if (io->len == 0) {

        io->dma_end(io);

        return;

    }

    /* launch next transfer */

    s->io_buffer_index = 0;

    s->io_buffer_size = io->len;

    qemu_sglist_init(&s->sg, io->len / MACIO_PAGE_SIZE + 1);

    qemu_sglist_add(&s->sg, io->addr, io->len);

    io->addr += io->len;

    io->len = 0;

    if (s->is_read)

        m->aiocb = dma_bdrv_read(s->bs, &s->sg, sector_num,

                                 pmac_ide_transfer_cb, io);

    else

        m->aiocb = dma_bdrv_write(s->bs, &s->sg, sector_num,

                                  pmac_ide_transfer_cb, io);

    if (!m->aiocb)

        pmac_ide_transfer_cb(io, -1);

}

static void pmac_ide_transfer(DBDMA_io *io)

{

    MACIOIDEState *m = io->opaque;

    IDEState *s = idebus_active_if(&m->bus);

    s->io_buffer_size = 0;

    if (s->is_cdrom) {

        pmac_ide_atapi_transfer_cb(io, 0);

        return;

    }

    pmac_ide_transfer_cb(io, 0);

}

static void pmac_ide_flush(DBDMA_io *io)

{

    MACIOIDEState *m = io->opaque;

    if (m->aiocb)

        qemu_aio_flush();

}

/* PowerMac IDE memory IO */

static void pmac_ide_writeb (void *opaque,

                             target_phys_addr_t addr, uint32_t val)

{

    MACIOIDEState *d = opaque;

    addr = (addr & 0xFFF) >> 4;

    switch (addr) {

    case 1 ... 7:

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

        break;

    case 8:

    case 22:

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

        break;

    default:

        break;

    }

}

static uint32_t pmac_ide_readb (void *opaque,target_phys_addr_t addr)

{

    uint8_t retval;

    MACIOIDEState *d = opaque;

    addr = (addr & 0xFFF) >> 4;

    switch (addr) {

    case 1 ... 7:

        retval = ide_ioport_read(&d->bus, addr);

        break;

    case 8:

    case 22:

        retval = ide_status_read(&d->bus, 0);

        break;

    default:

        retval = 0xFF;

        break;

    }

    return retval;

}

static void pmac_ide_writew (void *opaque,

                             target_phys_addr_t addr, uint32_t val)

{

    MACIOIDEState *d = opaque;

    addr = (addr & 0xFFF) >> 4;

    val = bswap16(val);

    if (addr == 0) {

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

    }

}

static uint32_t pmac_ide_readw (void *opaque,target_phys_addr_t addr)

{

    uint16_t retval;

    MACIOIDEState *d = opaque;

    addr = (addr & 0xFFF) >> 4;

    if (addr == 0) {

        retval = ide_data_readw(&d->bus, 0);

    } else {

        retval = 0xFFFF;

    }

    retval = bswap16(retval);

    return retval;

}

static void pmac_ide_writel (void *opaque,

                             target_phys_addr_t addr, uint32_t val)

{

    MACIOIDEState *d = opaque;

    addr = (addr & 0xFFF) >> 4;

    val = bswap32(val);

    if (addr == 0) {

        ide_data_writel(&d->bus, 0, val);

    }

}

static uint32_t pmac_ide_readl (void *opaque,target_phys_addr_t addr)

{

    uint32_t retval;

    MACIOIDEState *d = opaque;

    addr = (addr & 0xFFF) >> 4;

    if (addr == 0) {

        retval = ide_data_readl(&d->bus, 0);

    } else {

        retval = 0xFFFFFFFF;

    }

    retval = bswap32(retval);

    return retval;

}

static CPUWriteMemoryFunc * const pmac_ide_write[] = {

    pmac_ide_writeb,

    pmac_ide_writew,

    pmac_ide_writel,

};

static CPUReadMemoryFunc * const pmac_ide_read[] = {

    pmac_ide_readb,

    pmac_ide_readw,

    pmac_ide_readl,

};

static const VMStateDescription vmstate_pmac = {

    .name = "ide",

    .version_id = 3,

    .minimum_version_id = 0,

    .minimum_version_id_old = 0,

    .fields      = (VMStateField []) {

        VMSTATE_IDE_BUS(bus, MACIOIDEState),

        VMSTATE_IDE_DRIVES(bus.ifs, MACIOIDEState),

        VMSTATE_END_OF_LIST()

    }

};

static void pmac_ide_reset(void *opaque)

{

    MACIOIDEState *d = opaque;

    ide_bus_reset(&d->bus);

}

/* hd_table must contain 4 block drivers */

/* PowerMac uses memory mapped registers, not I/O. Return the memory

   I/O index to access the ide. */

int pmac_ide_init (DriveInfo **hd_table, qemu_irq irq,

                   void *dbdma, int channel, qemu_irq dma_irq)

{

    MACIOIDEState *d;

    int pmac_ide_memory;

    d = qemu_mallocz(sizeof(MACIOIDEState));

    ide_init2(&d->bus, hd_table[0], hd_table[1], irq);

    if (dbdma)

        DBDMA_register_channel(dbdma, channel, dma_irq, pmac_ide_transfer, pmac_ide_flush, d);

    pmac_ide_memory = cpu_register_io_memory(pmac_ide_read,

                                             pmac_ide_write, d);

    vmstate_register(0, &vmstate_pmac, d);

    qemu_register_reset(pmac_ide_reset, d);

    return pmac_ide_memory;

}