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pio.h revision 1.2 
      1  1.1  cgd /*
      2  1.1  cgd  * Mach Operating System
      3  1.1  cgd  * Copyright (c) 1990 Carnegie-Mellon University
      4  1.1  cgd  * All rights reserved.  The CMU software License Agreement specifies
      5  1.1  cgd  * the terms and conditions for use and redistribution.
      6  1.2  cgd  *
      7  1.2  cgd  *	$Id: pio.h,v 1.2 1993/05/22 08:00:27 cgd Exp $
      8  1.1  cgd  */
      9  1.1  cgd /*
     10  1.1  cgd  * HISTORY
     11  1.1  cgd  * $Log: pio.h,v $
     12  1.2  cgd  * Revision 1.2  1993/05/22 08:00:27  cgd
     13  1.2  cgd  * add rcsids to everything and clean up headers
     14  1.2  cgd  *
     15  1.1  cgd  * Revision 1.1  1993/03/21  18:09:48  cgd
     16  1.1  cgd  * after 0.2.2 "stable" patches applied
     17  1.1  cgd  *
     18  1.1  cgd  * Revision 1.1  1992/05/27  00:48:30  balsup
     19  1.1  cgd  * machkern/cor merge
     20  1.1  cgd  *
     21  1.1  cgd  * Revision 1.1  1991/10/10  20:11:39  balsup
     22  1.1  cgd  * Initial revision
     23  1.1  cgd  *
     24  1.1  cgd  * Revision 2.2  91/04/02  11:52:29  mbj
     25  1.1  cgd  * 	[90/08/14            mg32]
     26  1.1  cgd  *
     27  1.1  cgd  * 	Now we know how types are factor in.
     28  1.1  cgd  * 	Cleaned up a bunch: eliminated ({ for output and flushed unused
     29  1.1  cgd  * 	output variables.
     30  1.1  cgd  * 	[90/08/14            rvb]
     31  1.1  cgd  *
     32  1.1  cgd  * 	This is how its done in gcc:
     33  1.1  cgd  * 		Created.
     34  1.1  cgd  * 	[90/03/26            rvb]
     35  1.1  cgd  *
     36  1.1  cgd  */
     37  1.1  cgd 
     38  1.1  cgd 
     39  1.1  cgd #define inl(y) \
     40  1.1  cgd ({ unsigned long _tmp__; \
     41  1.1  cgd 	asm volatile("inl %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \
     42  1.1  cgd 	_tmp__; })
     43  1.1  cgd 
     44  1.1  cgd #define inw(y) \
     45  1.1  cgd ({ unsigned short _tmp__; \
     46  1.1  cgd 	asm volatile(".byte 0x66; inl %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \
     47  1.1  cgd 	_tmp__; })
     48  1.1  cgd 
     49  1.1  cgd #define inb(y) \
     50  1.1  cgd ({ unsigned char _tmp__; \
     51  1.1  cgd 	asm volatile("inb %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \
     52  1.1  cgd 	_tmp__; })
     53  1.1  cgd 
     54  1.1  cgd 
     55  1.1  cgd #define outl(x, y) \
     56  1.1  cgd { asm volatile("outl %0, %1" : : "a" (y) , "d" ((unsigned short)(x))); }
     57  1.1  cgd 
     58  1.1  cgd 
     59  1.1  cgd #define outw(x, y) \
     60  1.1  cgd {asm volatile(".byte 0x66; outl %0, %1" : : "a" ((unsigned short)(y)) , "d" ((unsigned short)(x))); }
     61  1.1  cgd 
     62           
     63           #define outb(x, y) \
     64           { asm volatile("outb %0, %1" : : "a" ((unsigned char)(y)) , "d" ((unsigned short)(x))); }
     65