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001 /* Copyright (C) 2004 All GPL'ed OS 002 003 This program is free software; you can redistribute it and/or 004 modify it under the terms of the GNU General Public License 005 as published by the Free Software Foundation; either version 2 006 of the License, or (at your option) any later version. 007 008 This program is distributed in the hope that it will be useful, 009 but WITHOUT ANY WARRANTY; without even the implied warranty of 010 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 011 GNU General Public License for more details. 012 013 You should have received a copy of the GNU General Public License 014 along with this program; if not, write to the Free Software 015 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 016 USA. 017 */ 018 #ifndef _SOS_IOPORTS_H_ 019 #define _SOS_IOPORTS_H_ 020 021 /** 022 * @ioports.h 023 * 024 * Intel-specific I/O space access routines. 025 */ 026 027 /* This macro allows to write to an I/O port */ 028 #define outb(value, port) \ 029 __asm__ volatile ( \ 030 "outb %b0,%w1" \ 031 ::"a" (value),"Nd" (port) \ 032 ) \ 033 034 // read one byte from port 035 #define inb(port) \ 036 ({ \ 037 unsigned char _v; \ 038 __asm__ volatile ( \ 039 "inb %w1,%0" \ 040 :"=a" (_v) \ 041 :"Nd" (port) \ 042 ); \ 043 _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 }) 064 065 // write value (word) on port 066 #define outl(value, port) \ 067 __asm__ volatile ( \ 068 "outl %0,%w1" \ 069 ::"a" (value),"Nd" (port) \ 070 ) \ 071 072 // read one word from port 073 #define inl(port) \ 074 ({ \ 075 unsigned int _v; \ 076 __asm__ volatile ( \ 077 "inl %w1,%0" \ 078 :"=a" (_v) \ 079 :"Nd" (port) \ 080 ); \ 081 _v; \ 082 }) 083 084 #endif /* _SOS_IOPORTS_H_ */
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