include/asm-mips/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 #include <linux/config.h>
  13 #if defined (CONFIG_SGI_IP27)
  14 #include <asm/sn/sn0/hubio.h>
  15 #endif
  16
  17
  18 #define IIO_ITTE_BASE           0x400160 /* base of translation table entries */
  19 #define IIO_ITTE(bigwin)        (IIO_ITTE_BASE + 8*(bigwin))
  20
  21 #define IIO_ITTE_OFFSET_BITS    5       /* size of offset field */
  22 #define IIO_ITTE_OFFSET_MASK    ((1<<IIO_ITTE_OFFSET_BITS)-1)
  23 #define IIO_ITTE_OFFSET_SHIFT   0
  24
  25 #define IIO_ITTE_WIDGET_BITS    4       /* size of widget field */
  26 #define IIO_ITTE_WIDGET_MASK    ((1<<IIO_ITTE_WIDGET_BITS)-1)
  27 #define IIO_ITTE_WIDGET_SHIFT   8
  28
  29 #define IIO_ITTE_IOSP           1       /* I/O Space bit */
  30 #define IIO_ITTE_IOSP_MASK      1
  31 #define IIO_ITTE_IOSP_SHIFT     12
  32 #define HUB_PIO_MAP_TO_MEM      0
  33 #define HUB_PIO_MAP_TO_IO       1
  34
  35 #define IIO_ITTE_INVALID_WIDGET 3       /* an invalid widget  */
  36
  37 #define IIO_ITTE_PUT(nasid, bigwin, io_or_mem, widget, addr) \
  38         REMOTE_HUB_S((nasid), IIO_ITTE(bigwin), \
  39                 (((((addr) >> BWIN_SIZE_BITS) & \
  40                    IIO_ITTE_OFFSET_MASK) << IIO_ITTE_OFFSET_SHIFT) | \
  41                 (io_or_mem << IIO_ITTE_IOSP_SHIFT) | \
  42                 (((widget) & IIO_ITTE_WIDGET_MASK) << IIO_ITTE_WIDGET_SHIFT)))
  43
  44 #define IIO_ITTE_DISABLE(nasid, bigwin) \
  45         IIO_ITTE_PUT((nasid), HUB_PIO_MAP_TO_MEM, \
  46                      (bigwin), IIO_ITTE_INVALID_WIDGET, 0)
  47
  48 #define IIO_ITTE_GET(nasid, bigwin) REMOTE_HUB_ADDR((nasid), IIO_ITTE(bigwin))
  49
  50 /*
  51  * Macro which takes the widget number, and returns the
  52  * IO PRB address of that widget.
  53  * value _x is expected to be a widget number in the range
  54  * 0, 8 - 0xF
  55  */
  56 #define IIO_IOPRB(_x)   (IIO_IOPRB_0 + ( ( (_x) < HUB_WIDGET_ID_MIN ? \
  57                         (_x) : \
  58                         (_x) - (HUB_WIDGET_ID_MIN-1)) << 3) )
  59
  60 #endif /* _ASM_SN_IO_H */