| * delay.h - delay functions |
| * Copyright (c) 2004-2007 Analog Devices Inc. |
| * Licensed under the GPL-2 or later. |
| #include <mach/anomaly.h> |
| static inline void __delay(unsigned long loops) |
| "LSETUP(1f, 1f) LC0 = %0;" |
| #include <linux/param.h> /* needed for HZ */ |
| * close approximation borrowed from m68knommu to avoid 64-bit math |
| #define HZSCALE (268435456 / (1000000/HZ)) |
| static inline unsigned long __to_delay(unsigned long scale) |
| extern unsigned long loops_per_jiffy; |
| return (((scale * HZSCALE) >> 11) * (loops_per_jiffy >> 11)) >> 6; |
| static inline void udelay(unsigned long usecs) |
| __delay(__to_delay(usecs)); |
| static inline void ndelay(unsigned long nsecs) |
| __delay(__to_delay(1) * nsecs / 1000); |