Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/* $Id: delay.h,v 1.11 2001/01/01 01:46:15 davem Exp $
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 <linux/config.h>
11#include <asm/cpudata.h>
12
13static inline void __delay(unsigned long loops)
14{
15 __asm__ __volatile__("cmp %0, 0\n\t"
16 "1: bne 1b\n\t"
17 "subcc %0, 1, %0\n" :
18 "=&r" (loops) :
19 "0" (loops) :
20 "cc");
21}
22
23/* This is too messy with inline asm on the Sparc. */
24extern void __udelay(unsigned long usecs, unsigned long lpj);
25extern void __ndelay(unsigned long nsecs, unsigned long lpj);
26
27#ifdef CONFIG_SMP
28#define __udelay_val cpu_data(smp_processor_id()).udelay_val
29#else /* SMP */
30#define __udelay_val loops_per_jiffy
31#endif /* SMP */
32#define udelay(__usecs) __udelay(__usecs, __udelay_val)
33#define ndelay(__nsecs) __ndelay(__nsecs, __udelay_val)
34
35#endif /* defined(__SPARC_DELAY_H) */