diff options
Diffstat (limited to 'include/asm-arm26/delay.h')
-rw-r--r-- | include/asm-arm26/delay.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/include/asm-arm26/delay.h b/include/asm-arm26/delay.h new file mode 100644 index 000000000000..40fbf7bbe6c2 --- /dev/null +++ b/include/asm-arm26/delay.h | |||
@@ -0,0 +1,34 @@ | |||
1 | #ifndef __ASM_ARM_DELAY_H | ||
2 | #define __ASM_ARM_DELAY_H | ||
3 | |||
4 | /* | ||
5 | * Copyright (C) 1995 Russell King | ||
6 | * | ||
7 | * Delay routines, using a pre-computed "loops_per_second" value. | ||
8 | */ | ||
9 | |||
10 | extern void __delay(int loops); | ||
11 | |||
12 | /* | ||
13 | * division by multiplication: you don't have to worry about | ||
14 | * loss of precision. | ||
15 | * | ||
16 | * Use only for very small delays ( < 1 msec). Should probably use a | ||
17 | * lookup table, really, as the multiplications take much too long with | ||
18 | * short delays. This is a "reasonable" implementation, though (and the | ||
19 | * first constant multiplications gets optimized away if the delay is | ||
20 | * a constant) | ||
21 | * | ||
22 | * FIXME - lets improve it then... | ||
23 | */ | ||
24 | extern void udelay(unsigned long usecs); | ||
25 | |||
26 | static inline unsigned long muldiv(unsigned long a, unsigned long b, unsigned long c) | ||
27 | { | ||
28 | return a * b / c; | ||
29 | } | ||
30 | |||
31 | |||
32 | |||
33 | #endif /* defined(_ARM_DELAY_H) */ | ||
34 | |||