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[/] [or1k/] [trunk/] [uclinux/] [uClinux-2.0.x/] [include/] [asm-i960/] [delay.h] - Blame information for rev 1765

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1 199 simons
#ifndef _I960_DELAY_H
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#define _I960_DELAY_H
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extern unsigned long loops_per_sec;
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#include <linux/kernel.h>
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#include <linux/config.h>
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/*
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 * Copyright (C) 1995 Erik Walthinsen (omega@cse.ogi.edu)
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 *
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 * Delay routines, using a pre-computed "loops_per_second" value.
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 */
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extern __inline__ void __delay(unsigned long loops)
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{
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        while (loops--);
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}
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/*
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 * Use only for very small delays ( < 1 msec).  Should probably use a
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 * lookup table, really, as the multiplications take much too long with
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 * short delays.  This is a "reasonable" implementation, though (and the
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 * first constant multiplications gets optimized away if the delay is
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 * a constant)
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 */
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extern __inline__ void udelay(unsigned long usecs)
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{
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        usecs *= loops_per_sec;
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        usecs /= 1000000;
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        __delay(usecs);
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}
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#define muldiv(a, b, c)    (((a)*(b))/(c))
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#endif /* defined(_I960_DELAY_H) */

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