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/*

 *      Precise Delay Loops for i386

 *

 *      Copyright (C) 1993 Linus Torvalds

 *      Copyright (C) 1997 Martin Mares <mj@atrey.karlin.mff.cuni.cz>

 *

 *      The __delay function must _NOT_ be inlined as its execution time

 *      depends wildly on alignment on many x86 processors.

 */

#include <linux/config.h>

#include <linux/sched.h>

#include <linux/delay.h>

#include <asm/delay.h>

#ifdef CONFIG_SMP

#include <asm/smp.h>

#endif

void __delay(unsigned long loops)

{

        unsigned long bclock, now;

        rdtscl(bclock);

        do

        {

                rep_nop();

                rdtscl(now);

        }

        while((now-bclock) < loops);

}

inline void __const_udelay(unsigned long xloops)

{

        __delay(((xloops * current_cpu_data.loops_per_jiffy) >> 32) * HZ);

}

void __udelay(unsigned long usecs)

{

        __const_udelay(usecs * 0x000010c6);  /* 2**32 / 1000000 */

}

void __ndelay(unsigned long usecs)

{

       __const_udelay(usecs * 0x00005);  /* 2**32 / 1000000000 (rounded up) */

}