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