LXR qemu/hw/intc/realview

   1/*
   2 * ARM RealView Emulation Baseboard Interrupt Controller
   3 *
   4 * Copyright (c) 2006-2007 CodeSourcery.
   5 * Written by Paul Brook
   6 *
   7 * This code is licensed under the GPL.
   8 */
   9
  10#include "qemu/osdep.h"
  11#include "qapi/error.h"
  12#include "hw/intc/realview_gic.h"
  13
  14static void realview_gic_set_irq(void *opaque, int irq, int level)
  15{
  16    RealViewGICState *s = (RealViewGICState *)opaque;
  17
  18    qemu_set_irq(qdev_get_gpio_in(DEVICE(&s->gic), irq), level);
  19}
  20
  21static void realview_gic_realize(DeviceState *dev, Error **errp)
  22{
  23    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
  24    RealViewGICState *s = REALVIEW_GIC(dev);
  25    SysBusDevice *busdev;
  26    Error *err = NULL;
  27    /* The GICs on the RealView boards have a fixed nonconfigurable
  28     * number of interrupt lines, so we don't need to expose this as
  29     * a qdev property.
  30     */
  31    int numirq = 96;
  32
  33    qdev_prop_set_uint32(DEVICE(&s->gic), "num-irq", numirq);
  34    object_property_set_bool(OBJECT(&s->gic), true, "realized", &err);
  35    if (err != NULL) {
  36        error_propagate(errp, err);
  37        return;
  38    }
  39    busdev = SYS_BUS_DEVICE(&s->gic);
  40
  41    /* Pass through outbound IRQ lines from the GIC */
  42    sysbus_pass_irq(sbd, busdev);
  43
  44    /* Pass through inbound GPIO lines to the GIC */
  45    qdev_init_gpio_in(dev, realview_gic_set_irq, numirq - 32);
  46
  47    memory_region_add_subregion(&s->container, 0,
  48                                sysbus_mmio_get_region(busdev, 1));
  49    memory_region_add_subregion(&s->container, 0x1000,
  50                                sysbus_mmio_get_region(busdev, 0));
  51}
  52
  53static void realview_gic_init(Object *obj)
  54{
  55    SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
  56    RealViewGICState *s = REALVIEW_GIC(obj);
  57    DeviceState *gicdev;
  58
  59    memory_region_init(&s->container, OBJECT(s),
  60                       "realview-gic-container", 0x2000);
  61    sysbus_init_mmio(sbd, &s->container);
  62
  63    object_initialize(&s->gic, sizeof(s->gic), TYPE_ARM_GIC);
  64    gicdev = DEVICE(&s->gic);
  65    qdev_set_parent_bus(gicdev, sysbus_get_default());
  66    qdev_prop_set_uint32(gicdev, "num-cpu", 1);
  67}
  68
  69static void realview_gic_class_init(ObjectClass *oc, void *data)
  70{
  71    DeviceClass *dc = DEVICE_CLASS(oc);
  72
  73    dc->realize = realview_gic_realize;
  74}
  75
  76static const TypeInfo realview_gic_info = {
  77    .name          = TYPE_REALVIEW_GIC,
  78    .parent        = TYPE_SYS_BUS_DEVICE,
  79    .instance_size = sizeof(RealViewGICState),
  80    .instance_init = realview_gic_init,
  81    .class_init    = realview_gic_class_init,
  82};
  83
  84static void realview_gic_register_types(void)
  85{
  86    type_register_static(&realview_gic_info);
  87}
  88
  89type_init(realview_gic_register_types)
  90