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delay.c

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <asm/param.h>

void __delay(unsigned long time)
{
      /* Stolen from the i386 __loop_delay */
      int d0;
      __asm__ __volatile__(
            "\tjmp 1f\n"
            ".align 16\n"
            "1:\tjmp 2f\n"
            ".align 16\n"
            "2:\tdecl %0\n\tjns 2b"
            :"=&a" (d0)
            :"0" (time));
}

void __udelay(unsigned long usecs)
{
      int i, n;

      n = (loops_per_jiffy * HZ * usecs) / MILLION;
        for(i=0;i<n;i++)
                cpu_relax();
}

EXPORT_SYMBOL(__udelay);

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