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 "qemu/module.h"
  13#include "hw/intc/realview_gic.h"
  14#include "hw/irq.h"
  15#include "hw/qdev-properties.h"
  16
  17static void realview_gic_set_irq(void *opaque, int irq, int level)
  18{
  19    RealViewGICState *s = (RealViewGICState *)opaque;
  20
  21    qemu_set_irq(qdev_get_gpio_in(DEVICE(&s->gic), irq), level);
  22}
  23
  24static void realview_gic_realize(DeviceState *dev, Error **errp)
  25{
  26    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
  27    RealViewGICState *s = REALVIEW_GIC(dev);
  28    SysBusDevice *busdev;
  29    /* The GICs on the RealView boards have a fixed nonconfigurable
  30     * number of interrupt lines, so we don't need to expose this as
  31     * a qdev property.
  32     */
  33    int numirq = 96;
  34
  35    qdev_prop_set_uint32(DEVICE(&s->gic), "num-irq", numirq);
  36    if (!sysbus_realize(SYS_BUS_DEVICE(&s->gic), errp)) {
  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
  58    memory_region_init(&s->container, OBJECT(s),
  59                       "realview-gic-container", 0x2000);
  60    sysbus_init_mmio(sbd, &s->container);
  61
  62    object_initialize_child(obj, "gic", &s->gic, TYPE_ARM_GIC);
  63    qdev_prop_set_uint32(DEVICE(&s->gic), "num-cpu", 1);
  64}
  65
  66static void realview_gic_class_init(ObjectClass *oc, void *data)
  67{
  68    DeviceClass *dc = DEVICE_CLASS(oc);
  69
  70    dc->realize = realview_gic_realize;
  71}
  72
  73static const TypeInfo realview_gic_info = {
  74    .name          = TYPE_REALVIEW_GIC,
  75    .parent        = TYPE_SYS_BUS_DEVICE,
  76    .instance_size = sizeof(RealViewGICState),
  77    .instance_init = realview_gic_init,
  78    .class_init    = realview_gic_class_init,
  79};
  80
  81static void realview_gic_register_types(void)
  82{
  83    type_register_static(&realview_gic_info);
  84}
  85
  86type_init(realview_gic_register_types)
  87