hw/realview_gic.c

   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 "sysbus.h"
  11
  12 typedef struct {
  13     SysBusDevice busdev;
  14     DeviceState *gic;
  15     MemoryRegion container;
  16 } RealViewGICState;
  17
  18 static void realview_gic_set_irq(void *opaque, int irq, int level)
  19 {
  20     RealViewGICState *s = (RealViewGICState *)opaque;
  21     qemu_set_irq(qdev_get_gpio_in(s->gic, irq), level);
  22 }
  23
  24 static int realview_gic_init(SysBusDevice *dev)
  25 {
  26     RealViewGICState *s = FROM_SYSBUS(RealViewGICState, dev);
  27     SysBusDevice *busdev;
  28     /* The GICs on the RealView boards have a fixed nonconfigurable
  29      * number of interrupt lines, so we don't need to expose this as
  30      * a qdev property.
  31      */
  32     int numirq = 96;
  33
  34     s->gic = qdev_create(NULL, "arm_gic");
  35     qdev_prop_set_uint32(s->gic, "num-cpu", 1);
  36     qdev_prop_set_uint32(s->gic, "num-irq", numirq);
  37     qdev_init_nofail(s->gic);
  38     busdev = sysbus_from_qdev(s->gic);
  39
  40     /* Pass through outbound IRQ lines from the GIC */
  41     sysbus_pass_irq(dev, busdev);
  42
  43     /* Pass through inbound GPIO lines to the GIC */
  44     qdev_init_gpio_in(&s->busdev.qdev, realview_gic_set_irq, numirq - 32);
  45
  46     memory_region_init(&s->container, "realview-gic-container", 0x2000);
  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     sysbus_init_mmio(dev, &s->container);
  52     return 0;
  53 }
  54
  55 static void realview_gic_class_init(ObjectClass *klass, void *data)
  56 {
  57     SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
  58
  59     sdc->init = realview_gic_init;
  60 }
  61
  62 static TypeInfo realview_gic_info = {
  63     .name          = "realview_gic",
  64     .parent        = TYPE_SYS_BUS_DEVICE,
  65     .instance_size = sizeof(RealViewGICState),
  66     .class_init    = realview_gic_class_init,
  67 };
  68
  69 static void realview_gic_register_types(void)
  70 {
  71     type_register_static(&realview_gic_info);
  72 }
  73
  74 type_init(realview_gic_register_types)