hw/intc/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 "hw/sysbus.h"
  11
  12 #define TYPE_REALVIEW_GIC "realview_gic"
  13 #define REALVIEW_GIC(obj) \
  14     OBJECT_CHECK(RealViewGICState, (obj), TYPE_REALVIEW_GIC)
  15
  16 typedef struct {
  17     SysBusDevice parent_obj;
  18
  19     DeviceState *gic;
  20     MemoryRegion container;
  21 } RealViewGICState;
  22
  23 static void realview_gic_set_irq(void *opaque, int irq, int level)
  24 {
  25     RealViewGICState *s = (RealViewGICState *)opaque;
  26     qemu_set_irq(qdev_get_gpio_in(s->gic, irq), level);
  27 }
  28
  29 static int realview_gic_init(SysBusDevice *sbd)
  30 {
  31     DeviceState *dev = DEVICE(sbd);
  32     RealViewGICState *s = REALVIEW_GIC(dev);
  33     SysBusDevice *busdev;
  34     /* The GICs on the RealView boards have a fixed nonconfigurable
  35      * number of interrupt lines, so we don't need to expose this as
  36      * a qdev property.
  37      */
  38     int numirq = 96;
  39
  40     s->gic = qdev_create(NULL, "arm_gic");
  41     qdev_prop_set_uint32(s->gic, "num-cpu", 1);
  42     qdev_prop_set_uint32(s->gic, "num-irq", numirq);
  43     qdev_init_nofail(s->gic);
  44     busdev = SYS_BUS_DEVICE(s->gic);
  45
  46     /* Pass through outbound IRQ lines from the GIC */
  47     sysbus_pass_irq(sbd, busdev);
  48
  49     /* Pass through inbound GPIO lines to the GIC */
  50     qdev_init_gpio_in(dev, realview_gic_set_irq, numirq - 32);
  51
  52     memory_region_init(&s->container, OBJECT(s),
  53                        "realview-gic-container", 0x2000);
  54     memory_region_add_subregion(&s->container, 0,
  55                                 sysbus_mmio_get_region(busdev, 1));
  56     memory_region_add_subregion(&s->container, 0x1000,
  57                                 sysbus_mmio_get_region(busdev, 0));
  58     sysbus_init_mmio(sbd, &s->container);
  59     return 0;
  60 }
  61
  62 static void realview_gic_class_init(ObjectClass *klass, void *data)
  63 {
  64     SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
  65
  66     sdc->init = realview_gic_init;
  67 }
  68
  69 static const TypeInfo realview_gic_info = {
  70     .name          = TYPE_REALVIEW_GIC,
  71     .parent        = TYPE_SYS_BUS_DEVICE,
  72     .instance_size = sizeof(RealViewGICState),
  73     .class_init    = realview_gic_class_init,
  74 };
  75
  76 static void realview_gic_register_types(void)
  77 {
  78     type_register_static(&realview_gic_info);
  79 }
  80
  81 type_init(realview_gic_register_types)