Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2003 PathScale, Inc. |
| 3 | * Copied from arch/x86_64 |
| 4 | * |
| 5 | * Licensed under the GPL |
| 6 | */ |
| 7 | |
Jeff Dike | 060e352 | 2005-05-20 13:59:08 -0700 | [diff] [blame] | 8 | #include <linux/module.h> |
| 9 | #include <linux/delay.h> |
| 10 | #include <asm/processor.h> |
| 11 | #include <asm/param.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | |
| 13 | void __delay(unsigned long loops) |
| 14 | { |
| 15 | unsigned long i; |
| 16 | |
Jeff Dike | 060e352 | 2005-05-20 13:59:08 -0700 | [diff] [blame] | 17 | for(i = 0; i < loops; i++) |
| 18 | cpu_relax(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | } |
| 20 | |
Bodo Stroesser | 5fd861b | 2005-05-05 16:15:37 -0700 | [diff] [blame] | 21 | void __udelay(unsigned long usecs) |
| 22 | { |
Jeff Dike | 060e352 | 2005-05-20 13:59:08 -0700 | [diff] [blame] | 23 | unsigned long i, n; |
Bodo Stroesser | 5fd861b | 2005-05-05 16:15:37 -0700 | [diff] [blame] | 24 | |
| 25 | n = (loops_per_jiffy * HZ * usecs) / MILLION; |
Jeff Dike | 060e352 | 2005-05-20 13:59:08 -0700 | [diff] [blame] | 26 | for(i=0;i<n;i++) |
| 27 | cpu_relax(); |
Bodo Stroesser | 5fd861b | 2005-05-05 16:15:37 -0700 | [diff] [blame] | 28 | } |
| 29 | |
Jeff Dike | 060e352 | 2005-05-20 13:59:08 -0700 | [diff] [blame] | 30 | EXPORT_SYMBOL(__udelay); |