60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
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/*
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* Mach Operating System
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* Copyright (c) 1990 Carnegie-Mellon University
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* All rights reserved. The CMU software License Agreement specifies
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* the terms and conditions for use and redistribution.
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*/
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/*
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* HISTORY
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* $Log: pio.h,v $
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* Revision 1.1 1993/03/21 18:04:42 cgd
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* after 0.2.2 "stable" patches applied
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*
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* Revision 1.1 1992/05/27 00:48:30 balsup
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* machkern/cor merge
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*
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* Revision 1.1 1991/10/10 20:11:39 balsup
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* Initial revision
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*
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* Revision 2.2 91/04/02 11:52:29 mbj
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* [90/08/14 mg32]
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*
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* Now we know how types are factor in.
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* Cleaned up a bunch: eliminated ({ for output and flushed unused
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* output variables.
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* [90/08/14 rvb]
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*
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* This is how its done in gcc:
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* Created.
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* [90/03/26 rvb]
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*
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*/
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#define inl(y) \
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({ unsigned long _tmp__; \
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asm volatile("inl %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \
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_tmp__; })
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#define inw(y) \
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({ unsigned short _tmp__; \
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asm volatile(".byte 0x66; inl %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \
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_tmp__; })
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#define inb(y) \
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({ unsigned char _tmp__; \
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asm volatile("inb %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \
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_tmp__; })
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#define outl(x, y) \
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{ asm volatile("outl %0, %1" : : "a" (y) , "d" ((unsigned short)(x))); }
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#define outw(x, y) \
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{asm volatile(".byte 0x66; outl %0, %1" : : "a" ((unsigned short)(y)) , "d" ((unsigned short)(x))); }
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#define outb(x, y) \
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{ asm volatile("outb %0, %1" : : "a" ((unsigned char)(y)) , "d" ((unsigned short)(x))); }
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