| Arnd Bergmann | aafe4db | 2009-05-13 22:56:33 +0000 | [diff] [blame] | 1 | #ifndef __ASM_GENERIC_DELAY_H |
| 2 | #define __ASM_GENERIC_DELAY_H |
| 3 | |
| Jonas Bonn | 30ab2b0 | 2011-07-02 10:29:24 +0200 | [diff] [blame^] | 4 | /* Undefined functions to get compile-time errors */ |
| 5 | extern void __bad_udelay(void); |
| 6 | extern void __bad_ndelay(void); |
| 7 | |
| Arnd Bergmann | aafe4db | 2009-05-13 22:56:33 +0000 | [diff] [blame] | 8 | extern void __udelay(unsigned long usecs); |
| Jonas Bonn | 30ab2b0 | 2011-07-02 10:29:24 +0200 | [diff] [blame^] | 9 | extern void __ndelay(unsigned long nsecs); |
| 10 | extern void __const_udelay(unsigned long xloops); |
| Arnd Bergmann | aafe4db | 2009-05-13 22:56:33 +0000 | [diff] [blame] | 11 | extern void __delay(unsigned long loops); |
| 12 | |
| Jonas Bonn | 30ab2b0 | 2011-07-02 10:29:24 +0200 | [diff] [blame^] | 13 | /* 0x10c7 is 2**32 / 1000000 (rounded up) */ |
| 14 | #define udelay(n) (__builtin_constant_p(n) ? \ |
| 15 | ((n) > 20000 ? __bad_udelay() : __const_udelay((n) * 0x10c7ul)) : \ |
| 16 | __udelay(n)) |
| 17 | |
| 18 | /* 0x5 is 2**32 / 1000000000 (rounded up) */ |
| 19 | #define ndelay(n) (__builtin_constant_p(n) ? \ |
| 20 | ((n) > 20000 ? __bad_ndelay() : __const_udelay((n) * 5ul)) : \ |
| 21 | __ndelay(n)) |
| Arnd Bergmann | aafe4db | 2009-05-13 22:56:33 +0000 | [diff] [blame] | 22 | |
| 23 | #endif /* __ASM_GENERIC_DELAY_H */ |