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#ifndef __ALPHA_DELAY_H

#define __ALPHA_DELAY_H

extern unsigned long loops_per_sec;

/*

 * Copyright (C) 1993 Linus Torvalds

 *

 * Delay routines, using a pre-computed "loops_per_second" value.

 */

extern __inline__ void __delay(unsigned long loops)

{

        __asm__ __volatile__(".align 3\n"

                "1:\tsubq %0,1,%0\n\t"

                "bge %0,1b": "=r" (loops) : "0" (loops));

}

/*

 * division by multiplication: you don't have to worry about

 * loss of precision.

 *

 * Use only for very small delays ( < 1 msec).  Should probably use a

 * lookup table, really, as the multiplications take much too long with

 * short delays.  This is a "reasonable" implementation, though (and the

 * first constant multiplications gets optimized away if the delay is

 * a constant)

 */

extern __inline__ void udelay(unsigned long usecs)

{

        usecs *= 0x000010c6f7a0b5edUL;          /* 2**64 / 1000000 */

        __asm__("umulh %1,%2,%0"

                :"=r" (usecs)

                :"r" (usecs),"r" (loops_per_sec));

        __delay(usecs);

}

/*

 * 64-bit integers means we don't have to worry about overflow as

 * on some other architectures..

 */

extern __inline__ unsigned long muldiv(unsigned long a, unsigned long b, unsigned long c)

{

        return (a*b)/c;

}

#endif /* defined(__ALPHA_DELAY_H) */