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[/] [or1k/] [trunk/] [uclinux/] [uClinux-2.0.x/] [include/] [asm-i960/] [delay.h] - Rev 1765

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#ifndef _I960_DELAY_H
#define _I960_DELAY_H
 
extern unsigned long loops_per_sec;
#include <linux/kernel.h>
#include <linux/config.h>
 
/*
 * Copyright (C) 1995 Erik Walthinsen (omega@cse.ogi.edu)
 *
 * Delay routines, using a pre-computed "loops_per_second" value.
 */
 
extern __inline__ void __delay(unsigned long loops)
{
	while (loops--);
}
 
/*
 * Use only for very small delays ( < 1 msec).  Should probably use a
 * lookup table, really, as the multiplications take much too long with
 * short delays.  This is a "reasonable" implementation, though (and the
 * first constant multiplications gets optimized away if the delay is
 * a constant)  
 */
extern __inline__ void udelay(unsigned long usecs)
{
	usecs *= loops_per_sec;
	usecs /= 1000000;
	__delay(usecs);
}
 
#define muldiv(a, b, c)    (((a)*(b))/(c))
 
#endif /* defined(_I960_DELAY_H) */
 

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