ca971bbfd8
This patch changes the top-level directory layout as a preparatory step for improving the tools for managing 3rd-party source codes. The rationale is described in the issue referenced below. Issue #1082
37 lines
684 B
C
37 lines
684 B
C
/*
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* \brief I/O port access function for x86
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* \author Norman Feske
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* \date 2009-03-31
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*/
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/*
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* Copyright (C) 2009-2013 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#ifndef _IO_PORT_H_
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#define _IO_PORT_H_
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/**
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* Read byte from I/O port
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*/
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inline unsigned char inb(unsigned short port)
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{
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unsigned char res;
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asm volatile ("inb %%dx, %0" :"=a"(res) :"Nd"(port));
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return res;
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}
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/**
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* Write byte to I/O port
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*/
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inline void outb(unsigned short port, unsigned char val)
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{
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asm volatile ("outb %b0, %w1" : : "a" (val), "Nd" (port));
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}
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#endif /* _IO_PORT_H_ */
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