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 licenced 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     int iomemtype;
  27 } RealViewGICState;
  28
  29 static uint32_t realview_gic_cpu_read(void *opaque, target_phys_addr_t offset)
  30 {
  31     gic_state *s = (gic_state *)opaque;
  32     return gic_cpu_read(s, gic_get_current_cpu(), offset);
  33 }
  34
  35 static void realview_gic_cpu_write(void *opaque, target_phys_addr_t offset,
  36                           uint32_t value)
  37 {
  38     gic_state *s = (gic_state *)opaque;
  39     gic_cpu_write(s, gic_get_current_cpu(), offset, value);
  40 }
  41
  42 static CPUReadMemoryFunc * const realview_gic_cpu_readfn[] = {
  43    realview_gic_cpu_read,
  44    realview_gic_cpu_read,
  45    realview_gic_cpu_read
  46 };
  47
  48 static CPUWriteMemoryFunc * const realview_gic_cpu_writefn[] = {
  49    realview_gic_cpu_write,
  50    realview_gic_cpu_write,
  51    realview_gic_cpu_write
  52 };
  53
  54 static void realview_gic_map(SysBusDevice *dev, target_phys_addr_t base)
  55 {
  56     RealViewGICState *s = FROM_SYSBUSGIC(RealViewGICState, dev);
  57     cpu_register_physical_memory(base, 0x1000, s->iomemtype);
  58     cpu_register_physical_memory(base + 0x1000, 0x1000, s->gic.iomemtype);
  59 }
  60
  61 static int realview_gic_init(SysBusDevice *dev)
  62 {
  63     RealViewGICState *s = FROM_SYSBUSGIC(RealViewGICState, dev);
  64
  65     gic_init(&s->gic);
  66     s->iomemtype = cpu_register_io_memory(realview_gic_cpu_readfn,
  67                                           realview_gic_cpu_writefn, s);
  68     sysbus_init_mmio_cb(dev, 0x2000, realview_gic_map);
  69     return 0;
  70 }
  71
  72 static void realview_gic_register_devices(void)
  73 {
  74     sysbus_register_dev("realview_gic", sizeof(RealViewGICState),
  75                         realview_gic_init);
  76 }
  77
  78 device_init(realview_gic_register_devices)