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001 /* Copyright (C) 2004 All GPL'ed OS 002 Copyright (C) 1999 Free Software Foundation, Inc. 003 004 This program is free software; you can redistribute it and/or 005 modify it under the terms of the GNU General Public License 006 as published by the Free Software Foundation; either version 2 007 of the License, or (at your option) any later version. 008 009 This program is distributed in the hope that it will be useful, 010 but WITHOUT ANY WARRANTY; without even the implied warranty of 011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 012 GNU General Public License for more details. 013 014 You should have received a copy of the GNU General Public License 015 along with this program; if not, write to the Free Software 016 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 017 USA. 018 */ 019 #ifndef _SOS_IOPORTS_H_ 020 #define _SOS_IOPORTS_H_ 021 022 /** 023 * @ioports.h 024 * 025 * Intel-specific I/O space access routines. 026 */ 027 028 /* This macro allows to write to an I/O port */ 029 #define outb(value, port) \ 030 __asm__ volatile ( \ 031 "outb %b0,%w1" \ 032 ::"a" (value),"Nd" (port) \ 033 ) \ 034 035 // read one byte from port 036 #define inb(port) \ 037 ({ \ 038 unsigned char _v; \ 039 __asm__ volatile ( \ 040 "inb %w1,%0" \ 041 :"=a" (_v) \ 042 :"Nd" (port) \ 043 ); \ 044 _v; \ 045 }) 046 047 #endif /* _SOS_IOPORTS_H_ */
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