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/* $Id: delay.h,v 1.4 1997/04/10 23:32:44 davem 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
extern unsigned long loops_per_sec;
extern __inline__ void __delay(unsigned long loops)
{
__asm__ __volatile__("
cmp %0, 0
1:
bne,pt %%xcc, 1b
subcc %0, 1, %0
" : "=&r" (loops)
: "0" (loops)
: "cc");
}
extern __inline__ void udelay(unsigned long usecs)
{
usecs *= 0x00000000000010c6UL; /* 2**32 / 1000000 */
__asm__ __volatile__("
mulx %1, %2, %0
srlx %0, 32, %0
" : "=r" (usecs)
: "r" (usecs), "r" (loops_per_sec));
__delay(usecs);
}
extern __inline__ unsigned long muldiv(unsigned long a, unsigned long b, unsigned long c)
{
return (a*b)/c;
}
#endif /* defined(__SPARC64_DELAY_H) */
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