Root/
1 | #ifndef _LINUX_DELAY_H |
2 | #define _LINUX_DELAY_H |
3 | |
4 | /* |
5 | * Copyright (C) 1993 Linus Torvalds |
6 | * |
7 | * Delay routines, using a pre-computed "loops_per_jiffy" value. |
8 | */ |
9 | |
10 | #include <linux/kernel.h> |
11 | |
12 | extern unsigned long loops_per_jiffy; |
13 | |
14 | #include <asm/delay.h> |
15 | |
16 | /* |
17 | * Using udelay() for intervals greater than a few milliseconds can |
18 | * risk overflow for high loops_per_jiffy (high bogomips) machines. The |
19 | * mdelay() provides a wrapper to prevent this. For delays greater |
20 | * than MAX_UDELAY_MS milliseconds, the wrapper is used. Architecture |
21 | * specific values can be defined in asm-???/delay.h as an override. |
22 | * The 2nd mdelay() definition ensures GCC will optimize away the |
23 | * while loop for the common cases where n <= MAX_UDELAY_MS -- Paul G. |
24 | */ |
25 | |
26 | #ifndef MAX_UDELAY_MS |
27 | #define MAX_UDELAY_MS 5 |
28 | #endif |
29 | |
30 | #ifndef mdelay |
31 | #define mdelay(n) (\ |
32 | (__builtin_constant_p(n) && (n)<=MAX_UDELAY_MS) ? udelay((n)*1000) : \ |
33 | ({unsigned long __ms=(n); while (__ms--) udelay(1000);})) |
34 | #endif |
35 | |
36 | #ifndef ndelay |
37 | static inline void ndelay(unsigned long x) |
38 | { |
39 | udelay(DIV_ROUND_UP(x, 1000)); |
40 | } |
41 | #define ndelay(x) ndelay(x) |
42 | #endif |
43 | |
44 | extern unsigned long lpj_fine; |
45 | void calibrate_delay(void); |
46 | void msleep(unsigned int msecs); |
47 | unsigned long msleep_interruptible(unsigned int msecs); |
48 | |
49 | static inline void ssleep(unsigned int seconds) |
50 | { |
51 | msleep(seconds * 1000); |
52 | } |
53 | |
54 | #endif /* defined(_LINUX_DELAY_H) */ |
55 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9