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 "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
  17 static 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
  24 static 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
  53 static 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
  66 static 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
  73 static 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
  81 static void realview_gic_register_types(void)
  82 {
  83     type_register_static(&realview_gic_info);
  84 }
  85
  86 type_init(realview_gic_register_types)