/* * include/asm-v850/delay.h -- Delay routines, using a pre-computed * 	"loops_per_second" value * *  Copyright (C) 2001,03  NEC Corporation *  Copyright (C) 2001,03  Miles Bader <miles@gnu.org> *  Copyright (C) 1994 Hamish Macdonald * * 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 for more details. */ #ifndef __V850_DELAY_H__#define __V850_DELAY_H__ #include <asm/param.h> static inline void __delay(unsigned long loops){	if (loops)		__asm__ __volatile__ ("1: add -1, %0; bnz 1b"				      : "=r" (loops) : "0" (loops));} /* * 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 * a constant)   */ extern unsigned long loops_per_jiffy; static inline void udelay(unsigned long usecs){	register unsigned long full_loops, part_loops; 	full_loops = ((usecs * HZ) / 1000000) * loops_per_jiffy;	usecs %= (1000000 / HZ);	part_loops = (usecs * HZ * loops_per_jiffy) / 1000000; 	__delay(full_loops + part_loops);} #endif /* __V850_DELAY_H__ */