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 * pio.h,v 10 * Revision 1.1 1993/03/21 18:09:48 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 #ident "$Id: pio.h,v 1.1.1.1 1993/09/29 06:09:22 briggs Exp $" 33 34 35 #define inl(y) \ 36 ({ unsigned long _tmp__; \ 37 asm volatile("inl %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \ 38 _tmp__; }) 39 40 #define inw(y) \ 41 ({ unsigned short _tmp__; \ 42 asm volatile(".byte 0x66; inl %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \ 43 _tmp__; }) 44 45 #define inb(y) \ 46 ({ unsigned char _tmp__; \ 47 asm volatile("inb %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \ 48 _tmp__; }) 49 50 51 #define outl(x, y) \ 52 { asm volatile("outl %0, %1" : : "a" (y) , "d" ((unsigned short)(x))); } 53 54 55 #define outw(x, y) \ 56 {asm volatile(".byte 0x66; outl %0, %1" : : "a" ((unsigned short)(y)) , "d" ((unsigned short)(x))); } 57 58 59 #define outb(x, y) \ 60 { asm volatile("outb %0, %1" : : "a" ((unsigned char)(y)) , "d" ((unsigned short)(x))); } 61