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