| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * Copyright (C) 1994 by Waldorf Electronics |
| * Copyright (C) 1995 - 2000, 01, 03 by Ralf Baechle |
| * Copyright (C) 1999, 2000 Silicon Graphics, Inc. |
| * Copyright (C) 2007 Maciej W. Rozycki |
| #include <linux/module.h> |
| #include <asm/compiler.h> |
| void __delay(unsigned long loops) |
| * 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 |
| void __udelay(unsigned long us) |
| unsigned int lpj = raw_current_cpu_data.udelay_val; |
| __delay((us * 0x000010c7ull * HZ * lpj) >> 32); |
| void __ndelay(unsigned long ns) |
| unsigned int lpj = raw_current_cpu_data.udelay_val; |
| __delay((ns * 0x00000005ull * HZ * lpj) >> 32); |