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 "monitor.h"

#include "sysbus.h"

#include "isa.h"

#include "exec-memory.h"

static ISABus *isabus;

target_phys_addr_t isa_mem_base = 0;

static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent);

static char *isabus_get_fw_dev_path(DeviceState *dev);

static struct BusInfo isa_bus_info = {

    .name      = "ISA",

    .size      = sizeof(ISABus),

    .print_dev = isabus_dev_print,

    .get_fw_dev_path = isabus_get_fw_dev_path,

};

ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space_io)

{

    if (isabus) {

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

        return NULL;

    }

    if (NULL == dev) {

        dev = qdev_create(NULL, "isabus-bridge");

        qdev_init_nofail(dev);

    }

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

    isabus->address_space_io = address_space_io;

    return isabus;

}

void isa_bus_irqs(ISABus *bus, qemu_irq *irqs)

{

    if (!bus) {

        hw_error("Can't set isa irqs with no isa bus present.");

    }

    bus->irqs = irqs;

}

/*

 * isa_get_irq() returns the corresponding qemu_irq entry for the i8259.

 *

 * This function is only for special cases such as the 'ferr', and

 * temporary use for normal devices until they are converted to qdev.

 */

qemu_irq isa_get_irq(ISADevice *dev, int isairq)

{

    assert(!dev || DO_UPCAST(ISABus, qbus, dev->qdev.parent_bus) == isabus);

    if (isairq < 0 || isairq > 15) {

        hw_error("isa irq %d invalid", isairq);

    }

    return isabus->irqs[isairq];

}

void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq)

{

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

    dev->isairq[dev->nirqs] = isairq;

    *p = isa_get_irq(dev, isairq);

    dev->nirqs++;

}

static inline void isa_init_ioport(ISADevice *dev, uint16_t ioport)

{

    if (dev && (dev->ioport_id == 0 || ioport < dev->ioport_id)) {

        dev->ioport_id = ioport;

    }

}

void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start)

{

    memory_region_add_subregion(isabus->address_space_io, start, io);

    isa_init_ioport(dev, start);

}

void isa_register_portio_list(ISADevice *dev, uint16_t start,

                              const MemoryRegionPortio *pio_start,

                              void *opaque, const char *name)

{

    PortioList *piolist = g_new(PortioList, 1);

    /* START is how we should treat DEV, regardless of the actual

       contents of the portio array.  This is how the old code

       actually handled e.g. the FDC device.  */

    isa_init_ioport(dev, start);

    portio_list_init(piolist, pio_start, opaque, name);

    portio_list_add(piolist, isabus->address_space_io, start);

}

static int isa_qdev_init(DeviceState *qdev)

{

    ISADevice *dev = ISA_DEVICE(qdev);

    ISADeviceClass *klass = ISA_DEVICE_GET_CLASS(dev);

    dev->isairq[0] = -1;

    dev->isairq[1] = -1;

    if (klass->init) {

        return klass->init(dev);

    }

    return 0;

}

ISADevice *isa_create(ISABus *bus, const char *name)

{

    DeviceState *dev;

    if (!bus) {

        hw_error("Tried to create isa device %s with no isa bus present.",

                 name);

    }

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

    return ISA_DEVICE(dev);

}

ISADevice *isa_try_create(ISABus *bus, const char *name)

{

    DeviceState *dev;

    if (!bus) {

        hw_error("Tried to create isa device %s with no isa bus present.",

                 name);

    }

    dev = qdev_try_create(&bus->qbus, name);

    return ISA_DEVICE(dev);

}

ISADevice *isa_create_simple(ISABus *bus, const char *name)

{

    ISADevice *dev;

    dev = isa_create(bus, name);

    qdev_init_nofail(&dev->qdev);

    return dev;

}

static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent)

{

    ISADevice *d = ISA_DEVICE(dev);

    if (d->isairq[1] != -1) {

        monitor_printf(mon, "%*sisa irqs %d,%d\n", indent, "",

                       d->isairq[0], d->isairq[1]);

    } else if (d->isairq[0] != -1) {

        monitor_printf(mon, "%*sisa irq %d\n", indent, "",

                       d->isairq[0]);

    }

}

static int isabus_bridge_init(SysBusDevice *dev)

{

    /* nothing */

    return 0;

}

static void isabus_bridge_class_init(ObjectClass *klass, void *data)

{

    DeviceClass *dc = DEVICE_CLASS(klass);

    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);

    k->init = isabus_bridge_init;

    dc->fw_name = "isa";

    dc->no_user = 1;

}

static TypeInfo isabus_bridge_info = {

    .name          = "isabus-bridge",

    .parent        = TYPE_SYS_BUS_DEVICE,

    .instance_size = sizeof(SysBusDevice),

    .class_init    = isabus_bridge_class_init,

};

static void isa_device_class_init(ObjectClass *klass, void *data)

{

    DeviceClass *k = DEVICE_CLASS(klass);

    k->init = isa_qdev_init;

    k->bus_info = &isa_bus_info;

}

static TypeInfo isa_device_type_info = {

    .name = TYPE_ISA_DEVICE,

    .parent = TYPE_DEVICE,

    .instance_size = sizeof(ISADevice),

    .abstract = true,

    .class_size = sizeof(ISADeviceClass),

    .class_init = isa_device_class_init,

};

static void isabus_register_devices(void)

{

    type_register_static(&isabus_bridge_info);

    type_register_static(&isa_device_type_info);

}

static char *isabus_get_fw_dev_path(DeviceState *dev)

{

    ISADevice *d = (ISADevice*)dev;

    char path[40];

    int off;

    off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev));

    if (d->ioport_id) {

        snprintf(path + off, sizeof(path) - off, "@%04x", d->ioport_id);

    }

    return strdup(path);

}

MemoryRegion *isa_address_space(ISADevice *dev)

{

    return get_system_memory();

}

device_init(isabus_register_devices)