| 1 | #ifndef __ASM_GENERIC_DELAY_H
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| 2 | #define __ASM_GENERIC_DELAY_H
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| 3 |
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| 4 |
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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 |
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| 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 |
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| 13 | |
| 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 |
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| 18 |
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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 | if ((n) / 20000 >= 1) \
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| 23 | __bad_udelay(); \
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| 24 | else \
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| 25 | __const_udelay((n) * 0x10c7ul); \
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| 26 | } else { \
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| 27 | __udelay(n); \
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| 28 | } \
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| 29 | })
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| 30 |
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| 31 |
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| 32 | #define ndelay(n) \
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| 33 | ({ \
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| 34 | if (__builtin_constant_p(n)) { \
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| 35 | if ((n) / 20000 >= 1) \
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| 36 | __bad_ndelay(); \
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| 37 | else \
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| 38 | __const_udelay((n) * 5ul); \
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| 39 | } else { \
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| 40 | __ndelay(n); \
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| 41 | } \
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| 42 | })
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| 43 |
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| 44 | #endif
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