arch/um/sys-i386/delay.c

   1 #include <linux/module.h>
   2 #include <linux/kernel.h>
   3 #include <linux/delay.h>
   4 #include <asm/param.h>
   5
   6 void __delay(unsigned long time)
   7 {
   8         /* Stolen from the i386 __loop_delay */
   9         int d0;
  10         __asm__ __volatile__(
  11                 "\tjmp 1f\n"
  12                 ".align 16\n"
  13                 "1:\tjmp 2f\n"
  14                 ".align 16\n"
  15                 "2:\tdecl %0\n\tjns 2b"
  16                 :"=&a" (d0)
  17                 :"0" (time));
  18 }
  19
  20 void __udelay(unsigned long usecs)
  21 {
  22         int i, n;
  23
  24         n = (loops_per_jiffy * HZ * usecs) / MILLION;
  25         for(i=0;i<n;i++)
  26                 cpu_relax();
  27 }
  28
  29 EXPORT_SYMBOL(__udelay);