1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 1994 by Waldorf Electronics 7 * Copyright (C) 1995 - 2000, 01, 03 by Ralf Baechle 8 * Copyright (C) 1999, 2000 Silicon Graphics, Inc. 9 * Copyright (C) 2007 Maciej W. Rozycki 10 */ 11 #ifndef _ASM_DELAY_H 12 #define _ASM_DELAY_H 13 14 #include <linux/param.h> 15 16 extern void __delay(unsigned long loops); 17 extern void __ndelay(unsigned long ns); 18 extern void __udelay(unsigned long us); 19 20 #define ndelay(ns) __ndelay(ns) 21 #define udelay(us) __udelay(us) 22 23 /* make sure "usecs *= ..." in udelay do not overflow. */ 24 #if HZ >= 1000 25 #define MAX_UDELAY_MS 1 26 #elif HZ <= 200 27 #define MAX_UDELAY_MS 5 28 #else 29 #define MAX_UDELAY_MS (1000 / HZ) 30 #endif 31 32 #endif /* _ASM_DELAY_H */ 33