text: /* 
   * Mach Operating System
   * Copyright (c) 1991,1990 Carnegie Mellon University
   * All Rights Reserved.
   * 
   * Permission to use, copy, modify and distribute this software and its
   * documentation is hereby granted, provided that both the copyright
   * notice and this permission notice appear in all copies of the
   * software, derivative works or modified versions, and any portions
   * thereof, and that both notices appear in supporting documentation.
   * 
   * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
   * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
   * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   * 
   * Carnegie Mellon requests users of this software to return to
   * 
   *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   *  School of Computer Science
   *  Carnegie Mellon University
   *  Pittsburgh PA 15213-3890
   * 
   * any improvements or extensions that they make and grant Carnegie Mellon
   * the rights to redistribute these changes.
   */
  /* 
   * HISTORY
   * $Log:	pio.h,v $
   * Revision 2.6  93/01/14  17:29:31  danner
   * 	altered malformed error message
   * 	[92/12/18            danner]
   * 	Took the warning inside ifndef __GNUC__ outside of comments. This
   * 	will make the compiler find the error instead of having to find
   * 	out about it manually.
   * 	Protected against multiple inclusions.
   * 	[92/11/30            jvh]
   * 
   * Revision 2.5  91/05/14  16:14:20  mrt
   * 	Correcting copyright
   * 
   * Revision 2.4  91/02/05  17:13:56  mrt
   * 	Changed to new Mach copyright
   * 	[91/02/01  17:37:08  mrt]
   * 
   * Revision 2.3  90/12/20  16:36:37  jeffreyh
   * 	changes for __STDC__
   * 	[90/12/07            jeffreyh]
   * 
   * Revision 2.2  90/11/26  14:48:41  rvb
   * 	Pulled from 2.5
   * 	[90/11/22  10:09:38  rvb]
   * 
   * 	[90/08/14            mg32]
   * 
   * 	Now we know how types are factor in.
   * 	Cleaned up a bunch: eliminated ({ for output and flushed unused
   * 	output variables.
   * 	[90/08/14            rvb]
   * 
   * 	This is how its done in gcc:
   * 		Created.
   * 	[90/03/26            rvb]
   * 
   */
  
  #ifndef _I386_PIO_H_
  #define _I386_PIO_H_
  
  #ifndef	__GNUC__
  #error	You do not stand a chance.  This file is gcc only.
  #endif	__GNUC__
  
  #define inl(y) \
  ({ unsigned long _tmp__; \
  	asm volatile("inl %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \
  	_tmp__; })
  
  #define inw(y) \
  ({ unsigned short _tmp__; \
  	asm volatile(".byte 0x66; inl %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \
  	_tmp__; })
  
  #define inb(y) \
  ({ unsigned char _tmp__; \
  	asm volatile("inb %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \
  	_tmp__; })
  
  
  #define outl(x, y) \
  { asm volatile("outl %0, %1" : : "a" (y) , "d" ((unsigned short)(x))); }
  
  
  #define outw(x, y) \
  {asm volatile(".byte 0x66; outl %0, %1" : : "a" ((unsigned short)(y)) , "d" ((unsigned short)(x))); }
  
  
  #define outb(x, y) \
  { asm volatile("outb %0, %1" : : "a" ((unsigned char)(y)) , "d" ((unsigned short)(x))); }
  
  #endif /* _I386_PIO_H_ */
  