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Sam Ravnborgf5e706a2008-07-17 21:55:51 -07001/*
2 * delay.h: Linux delay routines on the Sparc.
3 *
4 * Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu).
5 */
6
7#ifndef __SPARC_DELAY_H
8#define __SPARC_DELAY_H
9
10#include <asm/cpudata.h>
11
12static inline void __delay(unsigned long loops)
13{
14 __asm__ __volatile__("cmp %0, 0\n\t"
15 "1: bne 1b\n\t"
16 "subcc %0, 1, %0\n" :
17 "=&r" (loops) :
18 "0" (loops) :
19 "cc");
20}
21
22/* This is too messy with inline asm on the Sparc. */
23extern void __udelay(unsigned long usecs, unsigned long lpj);
24extern void __ndelay(unsigned long nsecs, unsigned long lpj);
25
26#ifdef CONFIG_SMP
27#define __udelay_val cpu_data(smp_processor_id()).udelay_val
28#else /* SMP */
29#define __udelay_val loops_per_jiffy
30#endif /* SMP */
31#define udelay(__usecs) __udelay(__usecs, __udelay_val)
32#define ndelay(__nsecs) __ndelay(__nsecs, __udelay_val)
33
34#endif /* defined(__SPARC_DELAY_H) */