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/* $Id: delay.h,v 1.7 1997/11/07 18:24:31 mj Exp $
* delay.h: Linux delay routines on the V9.
*
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu).
*/
#ifndef __SPARC64_DELAY_H
#define __SPARC64_DELAY_H
#ifdef __SMP__
#include <asm/smp.h>
#endif
extern __inline__ void __delay(unsigned long loops)
{
__asm__ __volatile__("
b,pt %%xcc, 1f
cmp %0, 0
.align 32
1:
bne,pt %%xcc, 1b
subcc %0, 1, %0
" : "=&r" (loops)
: "0" (loops)
: "cc");
}
extern __inline__ void __udelay(unsigned long usecs, unsigned long lps)
{
usecs *= 0x00000000000010c6UL; /* 2**32 / 1000000 */
__asm__ __volatile__("
mulx %1, %2, %0
srlx %0, 32, %0
" : "=r" (usecs)
: "r" (usecs), "r" (lps));
__delay(usecs);
}
#ifdef __SMP__
#define __udelay_val cpu_data[smp_processor_id()].udelay_val
#else
#define __udelay_val loops_per_sec
#endif
#define udelay(usecs) __udelay((usecs),__udelay_val)
#endif /* defined(__SPARC64_DELAY_H) */
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