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1#ifndef __ASM_ARM_DELAY_H
2#define __ASM_ARM_DELAY_H
3
4/*
5 * Copyright (C) 1995 Russell King
6 *
7 * Delay routines, using a pre-computed "loops_per_second" value.
8 */
9
10extern void __delay(int loops);
11
12/*
13 * division by multiplication: you don't have to worry about
14 * loss of precision.
15 *
16 * Use only for very small delays ( < 1 msec). Should probably use a
17 * lookup table, really, as the multiplications take much too long with
18 * short delays. This is a "reasonable" implementation, though (and the
19 * first constant multiplications gets optimized away if the delay is
20 * a constant)
21 *
22 * FIXME - lets improve it then...
23 */
24extern void udelay(unsigned long usecs);
25
26static inline unsigned long muldiv(unsigned long a, unsigned long b, unsigned long c)
27{
28 return a * b / c;
29}
30
31
32
33#endif /* defined(_ARM_DELAY_H) */
34