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001 /* Copyright (C) 2004 All GPL'ed OS 001 /* Copyright (C) 2004 All GPL'ed OS >> 002 Copyright (C) 1999 Free Software Foundation, Inc. 002 003 003 This program is free software; you can redi 004 This program is free software; you can redistribute it and/or 004 modify it under the terms of the GNU Genera 005 modify it under the terms of the GNU General Public License 005 as published by the Free Software Foundatio 006 as published by the Free Software Foundation; either version 2 006 of the License, or (at your option) any lat 007 of the License, or (at your option) any later version. 007 008 008 This program is distributed in the hope tha 009 This program is distributed in the hope that it will be useful, 009 but WITHOUT ANY WARRANTY; without even the 010 but WITHOUT ANY WARRANTY; without even the implied warranty of 010 MERCHANTABILITY or FITNESS FOR A PARTICULAR 011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 011 GNU General Public License for more details 012 GNU General Public License for more details. 012 013 013 You should have received a copy of the GNU 014 You should have received a copy of the GNU General Public License 014 along with this program; if not, write to t 015 along with this program; if not, write to the Free Software 015 Foundation, Inc., 59 Temple Place - Suite 3 016 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 016 USA. 017 USA. 017 */ 018 */ 018 #ifndef _SOS_IOPORTS_H_ 019 #ifndef _SOS_IOPORTS_H_ 019 #define _SOS_IOPORTS_H_ 020 #define _SOS_IOPORTS_H_ 020 021 021 /** 022 /** 022 * @ioports.h 023 * @ioports.h 023 * 024 * 024 * Intel-specific I/O space access routines. 025 * Intel-specific I/O space access routines. 025 */ 026 */ 026 027 027 /* This macro allows to write to an I/O port * 028 /* This macro allows to write to an I/O port */ 028 #define outb(value, port) 029 #define outb(value, port) \ 029 __asm__ volatile ( 030 __asm__ volatile ( \ 030 "outb %b0,%w1" 031 "outb %b0,%w1" \ 031 ::"a" (value),"Nd" (port) 032 ::"a" (value),"Nd" (port) \ 032 ) 033 ) \ 033 034 034 // read one byte from port 035 // read one byte from port 035 #define inb(port) 036 #define inb(port) \ 036 ({ 037 ({ \ 037 unsigned char _v; 038 unsigned char _v; \ 038 __asm__ volatile ( 039 __asm__ volatile ( \ 039 "inb %w1,%0" 040 "inb %w1,%0" \ 040 :"=a" (_v) 041 :"=a" (_v) \ 041 :"Nd" (port) 042 :"Nd" (port) \ 042 ); 043 ); \ 043 _v; 044 _v; \ 044 }) << 045 << 046 // write value (word) on port << 047 #define outw(value, port) << 048 __asm__ volatile ( << 049 "outw %w0,%w1" << 050 ::"a" (value),"Nd" (port) << 051 ) << 052 << 053 // read one word from port << 054 #define inw(port) << 055 ({ << 056 unsigned int _v; << 057 __asm__ volatile ( << 058 "inw %w1,%w0" << 059 :"=a" (_v) << 060 :"Nd" (port) << 061 ); << 062 _v; << 063 }) 045 }) 064 046 065 #endif /* _SOS_IOPORTS_H_ */ 047 #endif /* _SOS_IOPORTS_H_ */
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