drivers/char/rio/riscos.h

   1 /*
   2 ** -----------------------------------------------------------------------------
   3 **
   4 **  Perle Specialix driver for Linux
   5 **  Ported from existing RIO Driver for SCO sources.
   6  *
   7  *  (C) 1990 - 2000 Specialix International Ltd., Byfleet, Surrey, UK.
   8  *
   9  *      This program is free software; you can redistribute it and/or modify
  10  *      it under the terms of the GNU General Public License as published by
  11  *      the Free Software Foundation; either version 2 of the License, or
  12  *      (at your option) any later version.
  13  *
  14  *      This program is distributed in the hope that it will be useful,
  15  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *      GNU General Public License for more details.
  18  *
  19  *      You should have received a copy of the GNU General Public License
  20  *      along with this program; if not, write to the Free Software
  21  *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 **
  23 **      Module          : riscos.h
  24 **      SID             : 1.2
  25 **      Last Modified   : 11/6/98 11:34:19
  26 **      Retrieved       : 11/6/98 11:34:22
  27 **
  28 **  ident @(#)riscos.h  1.2
  29 **
  30 ** -----------------------------------------------------------------------------
  31 */
  32
  33 #ifndef __rio_riscos_h__
  34 #define __rio_riscos_h__
  35
  36 #ifdef SCCS_LABELS
  37 static char *_riscos_h_sccs_ = "@(#)riscos.h    1.2";
  38 #endif
  39
  40 /*
  41 ** This module used to define all those little itsy bits required for RISC/OS
  42 ** now it's full of null macros.
  43 */
  44
  45 /*
  46 **      RBYTE reads a byte from a location.
  47 **      RWORD reads a word from a location.
  48 **      WBYTE writes a byte to a location.
  49 **      WWORD writes a word to a location.
  50 **      RINDW reads a word through a pointer.
  51 **      WINDW writes a word through a pointer.
  52 **      RIOSWAB swaps the two bytes of a word, if needed.
  53 */
  54
  55 #define RIOSWAB(N)      (N)
  56 #define WBYTE(A,V)      (A)=(uchar)(V)
  57 #define WWORD(A,V)      (A)=(ushort)(V)
  58 #define RBYTE(A)        (uchar)(A)
  59 #define RWORD(A)        (ushort)(A)
  60 #define RINDW(A)        (*(ushort *)(A))
  61 #define WINDW(A,V)      (*(ushort *)(A)=(ushort)(V))
  62
  63 #endif /* __rio_riscos_h__ */