48 lines
1.9 KiB
C
48 lines
1.9 KiB
C
/* Copyright (C) 2004 All GPL'ed OS
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Copyright (C) 1999 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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USA.
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*/
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#ifndef _SOS_IOPORTS_H_
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#define _SOS_IOPORTS_H_
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/**
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* @ioports.h
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*
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* Intel-specific I/O space access routines.
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*/
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/* This macro allows to write to an I/O port */
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#define outb(value, port) \
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__asm__ volatile ( \
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"outb %b0,%w1" \
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::"a" (value),"Nd" (port) \
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) \
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// read one byte from port
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#define inb(port) \
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({ \
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unsigned char _v; \
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__asm__ volatile ( \
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"inb %w1,%0" \
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:"=a" (_v) \
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:"Nd" (port) \
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); \
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_v; \
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})
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#endif /* _SOS_IOPORTS_H_ */
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