arch/um/sys-x86_64/delay.c

   1 /*
   2  * Copyright 2003 PathScale, Inc.
   3  * Copied from arch/x86_64
   4  *
   5  * Licensed under the GPL
   6  */
   7
   8 #include <linux/module.h>
   9 #include <linux/delay.h>
  10 #include <asm/processor.h>
  11 #include <asm/param.h>
  12
  13 void __delay(unsigned long loops)
  14 {
  15         unsigned long i;
  16
  17         for(i = 0; i < loops; i++)
  18                 cpu_relax();
  19 }
  20
  21 void __udelay(unsigned long usecs)
  22 {
  23         unsigned long i, n;
  24
  25         n = (loops_per_jiffy * HZ * usecs) / MILLION;
  26         for(i=0;i<n;i++)
  27                 cpu_relax();
  28 }
  29
  30 EXPORT_SYMBOL(__udelay);
  31
  32 void __const_udelay(unsigned long usecs)
  33 {
  34         unsigned long i, n;
  35
  36         n = (loops_per_jiffy * HZ * usecs) / MILLION;
  37         for(i=0;i<n;i++)
  38                 cpu_relax();
  39 }
  40
  41 EXPORT_SYMBOL(__const_udelay);