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     Error *err = NULL;
  30     /* The GICs on the RealView boards have a fixed nonconfigurable
  31      * number of interrupt lines, so we don't need to expose this as
  32      * a qdev property.
  33      */
  34     int numirq = 96;
  35
  36     qdev_prop_set_uint32(DEVICE(&s->gic), "num-irq", numirq);
  37     object_property_set_bool(OBJECT(&s->gic), true, "realized", &err);
  38     if (err != NULL) {
  39         error_propagate(errp, err);
  40         return;
  41     }
  42     busdev = SYS_BUS_DEVICE(&s->gic);
  43
  44     /* Pass through outbound IRQ lines from the GIC */
  45     sysbus_pass_irq(sbd, busdev);
  46
  47     /* Pass through inbound GPIO lines to the GIC */
  48     qdev_init_gpio_in(dev, realview_gic_set_irq, numirq - 32);
  49
  50     memory_region_add_subregion(&s->container, 0,
  51                                 sysbus_mmio_get_region(busdev, 1));
  52     memory_region_add_subregion(&s->container, 0x1000,
  53                                 sysbus_mmio_get_region(busdev, 0));
  54 }
  55
  56 static void realview_gic_init(Object *obj)
  57 {
  58     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
  59     RealViewGICState *s = REALVIEW_GIC(obj);
  60
  61     memory_region_init(&s->container, OBJECT(s),
  62                        "realview-gic-container", 0x2000);
  63     sysbus_init_mmio(sbd, &s->container);
  64
  65     sysbus_init_child_obj(obj, "gic", &s->gic, sizeof(s->gic), TYPE_ARM_GIC);
  66     qdev_prop_set_uint32(DEVICE(&s->gic), "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)