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867e359b CM |
1 | /* |
2 | * Copyright 2010 Tilera Corporation. All Rights Reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation, version 2. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
11 | * NON INFRINGEMENT. See the GNU General Public License for | |
12 | * more details. | |
13 | */ | |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/delay.h> | |
17 | #include <linux/thread_info.h> | |
13371731 | 18 | #include <asm/timex.h> |
867e359b CM |
19 | |
20 | void __udelay(unsigned long usecs) | |
21 | { | |
13371731 CM |
22 | if (usecs > ULONG_MAX / 1000) { |
23 | WARN_ON_ONCE(usecs > ULONG_MAX / 1000); | |
24 | usecs = ULONG_MAX / 1000; | |
25 | } | |
26 | __ndelay(usecs * 1000); | |
867e359b CM |
27 | } |
28 | EXPORT_SYMBOL(__udelay); | |
29 | ||
30 | void __ndelay(unsigned long nsecs) | |
31 | { | |
13371731 CM |
32 | cycles_t target = get_cycles(); |
33 | target += ns2cycles(nsecs); | |
34 | while (get_cycles() < target) | |
35 | cpu_relax(); | |
867e359b CM |
36 | } |
37 | EXPORT_SYMBOL(__ndelay); | |
38 | ||
13371731 CM |
39 | void __delay(unsigned long cycles) |
40 | { | |
41 | cycles_t target = get_cycles() + cycles; | |
42 | while (get_cycles() < target) | |
43 | cpu_relax(); | |
44 | } | |
867e359b | 45 | EXPORT_SYMBOL(__delay); |