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/* $Id: udelay.h 1126 2010-07-13 03:25:44Z michael $
* $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/udelay.h $
*
* short delays
*
* Copyright (C) 1999, 2000 Michael Reinelt <michael@reinelt.co.at>
* Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
*
* This file is part of LCD4Linux.
*
* LCD4Linux is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* LCD4Linux is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#ifndef _UDELAY_H_
#define _UDELAY_H_
/* stolen from linux/asm-i386/processor.h */
/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
static inline void rep_nop(void)
{
#if defined(__i386) || defined(__i386__) || defined(__AMD64__) || defined(__x86_64__) || defined(__amd64__)
/* intel or amd64 arch, the "rep" and "nop" opcodes are available */
__asm__ __volatile__("rep; nop");
#else
/* other Arch, maybe add core cooldown code here, too. */
do {
} while (0);
#endif
}
void udelay_init(void);
unsigned long timing(const char *driver, const char *section, const char *name, const int defval, const char *unit);
void ndelay(const unsigned long nsec);
#define udelay(usec) ndelay(usec*1000)
#endif
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