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pio.h revision 1.1 
      1 /*
      2  * Mach Operating System
      3  * Copyright (c) 1990 Carnegie-Mellon University
      4  * All rights reserved.  The CMU software License Agreement specifies
      5  * the terms and conditions for use and redistribution.
      6  */
      7 /*
      8  * HISTORY
      9  * $Log: pio.h,v $
     10  * Revision 1.1  1993/03/21 18:04:42  cgd
     11  * after 0.2.2 "stable" patches applied
     12  *
     13  * Revision 1.1  1992/05/27  00:48:30  balsup
     14  * machkern/cor merge
     15  *
     16  * Revision 1.1  1991/10/10  20:11:39  balsup
     17  * Initial revision
     18  *
     19  * Revision 2.2  91/04/02  11:52:29  mbj
     20  * 	[90/08/14            mg32]
     21  *
     22  * 	Now we know how types are factor in.
     23  * 	Cleaned up a bunch: eliminated ({ for output and flushed unused
     24  * 	output variables.
     25  * 	[90/08/14            rvb]
     26  *
     27  * 	This is how its done in gcc:
     28  * 		Created.
     29  * 	[90/03/26            rvb]
     30  *
     31  */
     32 
     33 
     34 #define inl(y) \
     35 ({ unsigned long _tmp__; \
     36 	asm volatile("inl %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \
     37 	_tmp__; })
     38 
     39 #define inw(y) \
     40 ({ unsigned short _tmp__; \
     41 	asm volatile(".byte 0x66; inl %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \
     42 	_tmp__; })
     43 
     44 #define inb(y) \
     45 ({ unsigned char _tmp__; \
     46 	asm volatile("inb %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \
     47 	_tmp__; })
     48 
     49 
     50 #define outl(x, y) \
     51 { asm volatile("outl %0, %1" : : "a" (y) , "d" ((unsigned short)(x))); }
     52 
     53 
     54 #define outw(x, y) \
     55 {asm volatile(".byte 0x66; outl %0, %1" : : "a" ((unsigned short)(y)) , "d" ((unsigned short)(x))); }
     56 
     57 
     58 #define outb(x, y) \
     59 { asm volatile("outb %0, %1" : : "a" ((unsigned char)(y)) , "d" ((unsigned short)(x))); }
     60