mirror of
https://github.com/torvalds/linux.git
synced 2024-11-05 19:41:54 +00:00
35 lines
934 B
C
35 lines
934 B
C
/* $Id: delay.h,v 1.11 2001/01/01 01:46:15 davem Exp $
|
|
* delay.h: Linux delay routines on the Sparc.
|
|
*
|
|
* Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu).
|
|
*/
|
|
|
|
#ifndef __SPARC_DELAY_H
|
|
#define __SPARC_DELAY_H
|
|
|
|
#include <asm/cpudata.h>
|
|
|
|
static inline void __delay(unsigned long loops)
|
|
{
|
|
__asm__ __volatile__("cmp %0, 0\n\t"
|
|
"1: bne 1b\n\t"
|
|
"subcc %0, 1, %0\n" :
|
|
"=&r" (loops) :
|
|
"0" (loops) :
|
|
"cc");
|
|
}
|
|
|
|
/* This is too messy with inline asm on the Sparc. */
|
|
extern void __udelay(unsigned long usecs, unsigned long lpj);
|
|
extern void __ndelay(unsigned long nsecs, unsigned long lpj);
|
|
|
|
#ifdef CONFIG_SMP
|
|
#define __udelay_val cpu_data(smp_processor_id()).udelay_val
|
|
#else /* SMP */
|
|
#define __udelay_val loops_per_jiffy
|
|
#endif /* SMP */
|
|
#define udelay(__usecs) __udelay(__usecs, __udelay_val)
|
|
#define ndelay(__nsecs) __ndelay(__nsecs, __udelay_val)
|
|
|
|
#endif /* defined(__SPARC_DELAY_H) */
|