| * Copyright (C) 1995-2004 Russell King |
| * Delay routines, using a pre-computed "loops_per_second" value. |
| #ifndef __ASM_ARM_DELAY_H |
| #define __ASM_ARM_DELAY_H |
| extern void __delay(int loops); |
| * This function intentionally does not exist; if you see references to |
| * it, it means that you're calling udelay() with an out of range value. |
| * With currently imposed limits, this means that we support a max delay |
| * of 2000us and 671 bogomips |
| extern void __bad_udelay(void); |
| * division by multiplication: you don't have to worry about |
| * Use only for very small delays ( < 1 msec). Should probably use a |
| * lookup table, really, as the multiplications take much too long with |
| * short delays. This is a "reasonable" implementation, though (and the |
| * first constant multiplications gets optimized away if the delay is |
| extern void __udelay(unsigned long usecs); |
| extern void __const_udelay(unsigned long); |
| (__builtin_constant_p(n) ? \ |
| ((n) > (MAX_UDELAY_MS * 1000) ? __bad_udelay() : \ |
| __const_udelay((n) * 0x68dbul)) : \ |
| #endif /* defined(_ARM_DELAY_H) */ |