LXR linux/arch/mips/include/asm/sn/io.h

   1/*
   2 * This file is subject to the terms and conditions of the GNU General Public
   3 * License.  See the file "COPYING" in the main directory of this archive
   4 * for more details.
   5 *
   6 * Copyright (C) 2000, 2003 Ralf Baechle
   7 * Copyright (C) 2000 Silicon Graphics, Inc.
   8 */
   9#ifndef _ASM_SN_IO_H
  10#define _ASM_SN_IO_H
  11
  12#if defined(CONFIG_SGI_IP27)
  13#include <asm/sn/sn0/hubio.h>
  14#endif
  15
  16
  17#define IIO_ITTE_BASE           0x400160 /* base of translation table entries */
  18#define IIO_ITTE(bigwin)        (IIO_ITTE_BASE + 8*(bigwin))
  19
  20#define IIO_ITTE_OFFSET_BITS    5       /* size of offset field */
  21#define IIO_ITTE_OFFSET_MASK    ((1<<IIO_ITTE_OFFSET_BITS)-1)
  22#define IIO_ITTE_OFFSET_SHIFT   0
  23
  24#define IIO_ITTE_WIDGET_BITS    4       /* size of widget field */
  25#define IIO_ITTE_WIDGET_MASK    ((1<<IIO_ITTE_WIDGET_BITS)-1)
  26#define IIO_ITTE_WIDGET_SHIFT   8
  27
  28#define IIO_ITTE_IOSP           1       /* I/O Space bit */
  29#define IIO_ITTE_IOSP_MASK      1
  30#define IIO_ITTE_IOSP_SHIFT     12
  31#define HUB_PIO_MAP_TO_MEM      0
  32#define HUB_PIO_MAP_TO_IO       1
  33
  34#define IIO_ITTE_INVALID_WIDGET 3       /* an invalid widget  */
  35
  36#define IIO_ITTE_PUT(nasid, bigwin, io_or_mem, widget, addr) \
  37        REMOTE_HUB_S((nasid), IIO_ITTE(bigwin), \
  38                (((((addr) >> BWIN_SIZE_BITS) & \
  39                   IIO_ITTE_OFFSET_MASK) << IIO_ITTE_OFFSET_SHIFT) | \
  40                (io_or_mem << IIO_ITTE_IOSP_SHIFT) | \
  41                (((widget) & IIO_ITTE_WIDGET_MASK) << IIO_ITTE_WIDGET_SHIFT)))
  42
  43#define IIO_ITTE_DISABLE(nasid, bigwin) \
  44        IIO_ITTE_PUT((nasid), HUB_PIO_MAP_TO_MEM, \
  45                     (bigwin), IIO_ITTE_INVALID_WIDGET, 0)
  46
  47#define IIO_ITTE_GET(nasid, bigwin) REMOTE_HUB_ADDR((nasid), IIO_ITTE(bigwin))
  48
  49/*
  50 * Macro which takes the widget number, and returns the
  51 * IO PRB address of that widget.
  52 * value _x is expected to be a widget number in the range
  53 * 0, 8 - 0xF
  54 */
  55#define IIO_IOPRB(_x)   (IIO_IOPRB_0 + ( ( (_x) < HUB_WIDGET_ID_MIN ? \
  56                        (_x) : \
  57                        (_x) - (HUB_WIDGET_ID_MIN-1)) << 3) )
  58
  59#endif /* _ASM_SN_IO_H */
  60