| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | #ifndef _I386_DELAY_H |
| 2 | #define _I386_DELAY_H |
| 3 | |
| 4 | /* |
| 5 | * Copyright (C) 1993 Linus Torvalds |
| 6 | * |
| 7 | * Delay routines calling functions in arch/i386/lib/delay.c |
| 8 | */ |
| 9 | |
| 10 | extern void __bad_udelay(void); |
| 11 | extern void __bad_ndelay(void); |
| 12 | |
| 13 | extern void __udelay(unsigned long usecs); |
| 14 | extern void __ndelay(unsigned long nsecs); |
| 15 | extern void __const_udelay(unsigned long usecs); |
| 16 | extern void __delay(unsigned long loops); |
| 17 | |
| 18 | #define udelay(n) (__builtin_constant_p(n) ? \ |
| 19 | ((n) > 20000 ? __bad_udelay() : __const_udelay((n) * 0x10c7ul)) : \ |
| 20 | __udelay(n)) |
| 21 | |
| 22 | #define ndelay(n) (__builtin_constant_p(n) ? \ |
| 23 | ((n) > 20000 ? __bad_ndelay() : __const_udelay((n) * 5ul)) : \ |
| 24 | __ndelay(n)) |
| 25 | |
| 26 | #endif /* defined(_I386_DELAY_H) */ |