Archipelago » qemu

/*

 * isa bus support for qdev.

 *

 * Copyright (c) 2009 Gerd Hoffmann <kraxel@redhat.com>

 *

 * 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 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 Lesser General Public

 * License along with this library; if not, see <http://www.gnu.org/licenses/>.

 */

#include "hw.h"

#include "sysemu.h"

#include "isa.h"

struct ISABus {

    BusState qbus;

};

static ISABus *isabus;

static struct BusInfo isa_bus_info = {

    .name  = "ISA",

    .size  = sizeof(ISABus),

    .props = (Property[]) {

        {

            .name   = "iobase",

            .info   = &qdev_prop_hex32,

            .offset = offsetof(ISADevice, iobase[0]),

            .defval = (uint32_t[]) { -1 },

        },{

            .name   = "iobase2",

            .info   = &qdev_prop_hex32,

            .offset = offsetof(ISADevice, iobase[1]),

            .defval = (uint32_t[]) { -1 },

        },

        {/* end of list */}

    }

};

ISABus *isa_bus_new(DeviceState *dev)

{

    if (isabus) {

        fprintf(stderr, "Can't create a second ISA bus\n");

        return NULL;

    }

    isabus = FROM_QBUS(ISABus, qbus_create(&isa_bus_info, dev, NULL));

    return isabus;

}

void isa_connect_irq(ISADevice *dev, int n, qemu_irq irq)

{

    assert(n >= 0 && n < dev->nirqs);

    if (dev->irqs[n])

        *dev->irqs[n] = irq;

}

void isa_init_irq(ISADevice *dev, qemu_irq *p)

{

    assert(dev->nirqs < ARRAY_SIZE(dev->irqs));

    dev->irqs[dev->nirqs] = p;

    dev->nirqs++;

}

static void isa_qdev_init(DeviceState *qdev, DeviceInfo *base)

{

    ISADevice *dev = DO_UPCAST(ISADevice, qdev, qdev);

    ISADeviceInfo *info = DO_UPCAST(ISADeviceInfo, qdev, base);

    info->init(dev);

}

void isa_qdev_register(ISADeviceInfo *info)

{

    info->qdev.init = isa_qdev_init;

    info->qdev.bus_info = &isa_bus_info;

    qdev_register(&info->qdev);

}

ISADevice *isa_create_simple(const char *name, uint32_t iobase, uint32_t iobase2)

{

    DeviceState *dev;

    ISADevice *isa;

    if (!isabus) {

        fprintf(stderr, "Tried to create isa device %s with no isa bus present.\n", name);

        return NULL;

    }

    dev = qdev_create(&isabus->qbus, name);

    isa = DO_UPCAST(ISADevice, qdev, dev);

    isa->iobase[0] = iobase;

    isa->iobase[1] = iobase2;

    qdev_init(dev);

    return isa;

}