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6d5d1055ea
git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@840 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/* $Id$
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* $URL$
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*
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* short delays
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*
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* Copyright (C) 1999, 2000 Michael Reinelt <michael@reinelt.co.at>
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* Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
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*
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* This file is part of LCD4Linux.
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*
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* LCD4Linux is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* LCD4Linux 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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*
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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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#ifndef _UDELAY_H_
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#define _UDELAY_H_
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/* stolen from linux/asm-i386/processor.h */
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/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
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static inline void rep_nop(void)
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{
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# if defined(__i386) || defined(__i386__) || defined(__AMD64__) || defined(__x86_64__) || defined(__amd64__)
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/* intel or amd64 arch, the "rep" and "nop" opcodes are available */
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__asm__ __volatile__("rep; nop");
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# else
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/* other Arch, maybe add core cooldown code here, too. */
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do {
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} while (0);
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# endif
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}
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void udelay_init(void);
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unsigned long timing(const char *driver, const char *section, const char *name, const int defval, const char *unit);
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void ndelay(const unsigned long nsec);
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#define udelay(usec) ndelay(usec*1000)
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#endif
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