include/asm-ia64/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 Silicon Graphics, Inc.  All Rights Reserved.
   7  * Copyright (C) 2000 Ralf Baechle
   8  */
   9 #ifndef _ASM_IA64_SN_IO_H
  10 #define _ASM_IA64_SN_IO_H
  11
  12 #include <asm/sn/addrs.h>
  13
  14 /* Because we only have PCI I/O ports.  */
  15 #define IIO_ITTE_BASE   0x400160        /* base of translation table entries */
  16 #define IIO_ITTE(bigwin)        (IIO_ITTE_BASE + 8*(bigwin))
  17
  18 #define IIO_ITTE_OFFSET_BITS    5       /* size of offset field */
  19 #define IIO_ITTE_OFFSET_MASK    ((1<<IIO_ITTE_OFFSET_BITS)-1)
  20 #define IIO_ITTE_OFFSET_SHIFT   0
  21
  22 #define IIO_ITTE_WIDGET_BITS    4       /* size of widget field */
  23 #define IIO_ITTE_WIDGET_MASK    ((1<<IIO_ITTE_WIDGET_BITS)-1)
  24 #define IIO_ITTE_WIDGET_SHIFT   8
  25
  26 #define IIO_ITTE_IOSP           1       /* I/O Space bit */
  27 #define IIO_ITTE_IOSP_MASK      1
  28 #define IIO_ITTE_IOSP_SHIFT     12
  29 #define HUB_PIO_MAP_TO_MEM      0
  30 #define HUB_PIO_MAP_TO_IO       1
  31
  32 #define IIO_ITTE_INVALID_WIDGET 3       /* an invalid widget  */
  33
  34 #define IIO_ITTE_PUT(nasid, bigwin, io_or_mem, widget, addr) \
  35         REMOTE_HUB_S((nasid), IIO_ITTE(bigwin), \
  36                 (((((addr) >> BWIN_SIZE_BITS) & \
  37                    IIO_ITTE_OFFSET_MASK) << IIO_ITTE_OFFSET_SHIFT) | \
  38                 (io_or_mem << IIO_ITTE_IOSP_SHIFT) | \
  39                 (((widget) & IIO_ITTE_WIDGET_MASK) << IIO_ITTE_WIDGET_SHIFT)))
  40
  41 #define IIO_ITTE_DISABLE(nasid, bigwin) \
  42         IIO_ITTE_PUT((nasid), (bigwin), HUB_PIO_MAP_TO_MEM, \
  43                 IIO_ITTE_INVALID_WIDGET, 0)
  44
  45 #define IIO_ITTE_GET(nasid, bigwin) REMOTE_HUB_ADDR((nasid), IIO_ITTE(bigwin))
  46
  47 /*
  48  * Macro which takes the widget number, and returns the
  49  * IO PRB address of that widget.
  50  * value _x is expected to be a widget number in the range
  51  * 0, 8 - 0xF
  52  */
  53 #define IIO_IOPRB(_x)   (IIO_IOPRB_0 + ( ( (_x) < HUB_WIDGET_ID_MIN ? \
  54                         (_x) : \
  55                         (_x) - (HUB_WIDGET_ID_MIN-1)) << 3) )
  56
  57 #include <asm/sn/sn2/shub.h>
  58 #include <asm/sn/sn2/shubio.h>
  59
  60 /*
  61  * Used to ensure write ordering (like mb(), but for I/O space)
  62  */
  63 extern void sn_mmiob(void);
  64
  65 #endif /* _ASM_IA64_SN_IO_H */