Archipelago » qemu

/*

 * ARM RealView Emulation Baseboard Interrupt Controller

 *

 * Copyright (c) 2006-2007 CodeSourcery.

 * Written by Paul Brook

 *

 * This code is licensed under the GPL.

 */

#include "sysbus.h"

typedef struct {

    SysBusDevice busdev;

    DeviceState *gic;

    MemoryRegion container;

} RealViewGICState;

static void realview_gic_set_irq(void *opaque, int irq, int level)

{

    RealViewGICState *s = (RealViewGICState *)opaque;

    qemu_set_irq(qdev_get_gpio_in(s->gic, irq), level);

}

static int realview_gic_init(SysBusDevice *dev)

{

    RealViewGICState *s = FROM_SYSBUS(RealViewGICState, dev);

    SysBusDevice *busdev;

    /* The GICs on the RealView boards have a fixed nonconfigurable

     * number of interrupt lines, so we don't need to expose this as

     * a qdev property.

     */

    int numirq = 96;

    s->gic = qdev_create(NULL, "arm_gic");

    qdev_prop_set_uint32(s->gic, "num-cpu", 1);

    qdev_prop_set_uint32(s->gic, "num-irq", numirq);

    qdev_init_nofail(s->gic);

    busdev = sysbus_from_qdev(s->gic);

    /* Pass through outbound IRQ lines from the GIC */

    sysbus_pass_irq(dev, busdev);

    /* Pass through inbound GPIO lines to the GIC */

    qdev_init_gpio_in(&s->busdev.qdev, realview_gic_set_irq, numirq - 32);

    memory_region_init(&s->container, "realview-gic-container", 0x2000);

    memory_region_add_subregion(&s->container, 0,

                                sysbus_mmio_get_region(busdev, 1));

    memory_region_add_subregion(&s->container, 0x1000,

                                sysbus_mmio_get_region(busdev, 0));

    sysbus_init_mmio(dev, &s->container);

    return 0;

}

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

{

    SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);

    sdc->init = realview_gic_init;

}

static TypeInfo realview_gic_info = {

    .name          = "realview_gic",

    .parent        = TYPE_SYS_BUS_DEVICE,

    .instance_size = sizeof(RealViewGICState),

    .class_init    = realview_gic_class_init,

};

static void realview_gic_register_types(void)

{

    type_register_static(&realview_gic_info);

}

type_init(realview_gic_register_types)