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