hw/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 "sysbus.h"
  11
  12 #define GIC_NIRQ 96
  13 #define NCPU 1
  14
  15 /* Only a single "CPU" interface is present.  */
  16 static inline int
  17 gic_get_current_cpu(void)
  18 {
  19   return 0;
  20 }
  21
  22 #include "arm_gic.c"
  23
  24 typedef struct {
  25     gic_state gic;
  26     MemoryRegion iomem;
  27     MemoryRegion container;
  28 } RealViewGICState;
  29
  30 static uint64_t realview_gic_cpu_read(void *opaque, target_phys_addr_t offset,
  31                                       unsigned size)
  32 {
  33     gic_state *s = (gic_state *)opaque;
  34     return gic_cpu_read(s, gic_get_current_cpu(), offset);
  35 }
  36
  37 static void realview_gic_cpu_write(void *opaque, target_phys_addr_t offset,
  38                                    uint64_t value, unsigned size)
  39 {
  40     gic_state *s = (gic_state *)opaque;
  41     gic_cpu_write(s, gic_get_current_cpu(), offset, value);
  42 }
  43
  44 static const MemoryRegionOps realview_gic_cpu_ops = {
  45     .read = realview_gic_cpu_read,
  46     .write = realview_gic_cpu_write,
  47     .endianness = DEVICE_NATIVE_ENDIAN,
  48 };
  49
  50 static void realview_gic_map_setup(RealViewGICState *s)
  51 {
  52     memory_region_init(&s->container, "realview-gic-container", 0x2000);
  53     memory_region_init_io(&s->iomem, &realview_gic_cpu_ops, &s->gic,
  54                           "realview-gic", 0x1000);
  55     memory_region_add_subregion(&s->container, 0, &s->iomem);
  56     memory_region_add_subregion(&s->container, 0x1000, &s->gic.iomem);
  57 }
  58
  59 static int realview_gic_init(SysBusDevice *dev)
  60 {
  61     RealViewGICState *s = FROM_SYSBUSGIC(RealViewGICState, dev);
  62
  63     gic_init(&s->gic);
  64     realview_gic_map_setup(s);
  65     sysbus_init_mmio_region(dev, &s->container);
  66     return 0;
  67 }
  68
  69 static void realview_gic_register_devices(void)
  70 {
  71     sysbus_register_dev("realview_gic", sizeof(RealViewGICState),
  72                         realview_gic_init);
  73 }
  74
  75 device_init(realview_gic_register_devices)