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 "hw/intc/realview_gic.h"
  13
  14 static void realview_gic_set_irq(void *opaque, int irq, int level)
  15 {
  16     RealViewGICState *s = (RealViewGICState *)opaque;
  17
  18     qemu_set_irq(qdev_get_gpio_in(DEVICE(&s->gic), irq), level);
  19 }
  20
  21 static void realview_gic_realize(DeviceState *dev, Error **errp)
  22 {
  23     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
  24     RealViewGICState *s = REALVIEW_GIC(dev);
  25     SysBusDevice *busdev;
  26     Error *err = NULL;
  27     /* The GICs on the RealView boards have a fixed nonconfigurable
  28      * number of interrupt lines, so we don't need to expose this as
  29      * a qdev property.
  30      */
  31     int numirq = 96;
  32
  33     qdev_prop_set_uint32(DEVICE(&s->gic), "num-irq", numirq);
  34     object_property_set_bool(OBJECT(&s->gic), true, "realized", &err);
  35     if (err != NULL) {
  36         error_propagate(errp, err);
  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     DeviceState *gicdev;
  58
  59     memory_region_init(&s->container, OBJECT(s),
  60                        "realview-gic-container", 0x2000);
  61     sysbus_init_mmio(sbd, &s->container);
  62
  63     object_initialize(&s->gic, sizeof(s->gic), TYPE_ARM_GIC);
  64     gicdev = DEVICE(&s->gic);
  65     qdev_set_parent_bus(gicdev, sysbus_get_default());
  66     qdev_prop_set_uint32(gicdev, "num-cpu", 1);
  67 }
  68
  69 static void realview_gic_class_init(ObjectClass *oc, void *data)
  70 {
  71     DeviceClass *dc = DEVICE_CLASS(oc);
  72
  73     dc->realize = realview_gic_realize;
  74 }
  75
  76 static const TypeInfo realview_gic_info = {
  77     .name          = TYPE_REALVIEW_GIC,
  78     .parent        = TYPE_SYS_BUS_DEVICE,
  79     .instance_size = sizeof(RealViewGICState),
  80     .instance_init = realview_gic_init,
  81     .class_init    = realview_gic_class_init,
  82 };
  83
  84 static void realview_gic_register_types(void)
  85 {
  86     type_register_static(&realview_gic_info);
  87 }
  88
  89 type_init(realview_gic_register_types)