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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5270 | serge | 1 | #ifndef __ASM_GENERIC_DELAY_H |
| 2 | #define __ASM_GENERIC_DELAY_H |
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| 3 | |||
| 4 | /* Undefined functions to get compile-time errors */ |
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| 5 | extern void __bad_udelay(void); |
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| 6 | extern void __bad_ndelay(void); |
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| 7 | |||
| 8 | extern void __udelay(unsigned long usecs); |
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| 9 | extern void __ndelay(unsigned long nsecs); |
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| 10 | extern void __const_udelay(unsigned long xloops); |
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| 11 | extern void __delay(unsigned long loops); |
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| 12 | |||
| 13 | /* |
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| 14 | * The weird n/20000 thing suppresses a "comparison is always false due to |
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| 15 | * limited range of data type" warning with non-const 8-bit arguments. |
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| 16 | */ |
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| 17 | |||
| 18 | /* 0x10c7 is 2**32 / 1000000 (rounded up) */ |
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| 19 | #define udelay(n) \ |
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| 20 | ({ \ |
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| 21 | if (__builtin_constant_p(n)) { \ |
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| 22 | __const_udelay((n) * 0x10c7ul); \ |
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| 23 | } else { \ |
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| 24 | __udelay(n); \ |
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| 25 | } \ |
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| 26 | }) |
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| 27 | |||
| 28 | /* 0x5 is 2**32 / 1000000000 (rounded up) */ |
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| 29 | #define ndelay(n) \ |
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| 30 | ({ \ |
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| 31 | if (__builtin_constant_p(n)) { \ |
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| 32 | if ((n) / 20000 >= 1) \ |
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| 33 | __bad_ndelay(); \ |
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| 34 | else \ |
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| 35 | __const_udelay((n) * 5ul); \ |
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| 36 | } else { \ |
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| 37 | __ndelay(n); \ |
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| 38 | } \ |
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| 39 | }) |
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| 40 | |||
| 41 | #endif /* __ASM_GENERIC_DELAY_H */ |