#ifndef _H8300_DELAY_H #define _H8300_DELAY_H #include <asm/param.h> /* * Copyright (C) 2002 Yoshinori Sato <ysato@sourceforge.jp> * * Delay routines, using a pre-computed "loops_per_second" value. */ extern __inline__ void __delay(unsigned long loops) { __asm__ __volatile__ ("1:\n\t" "dec.l #1,%0\n\t" "bne 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; extern __inline__ void udelay(unsigned long usecs) { usecs *= 4295; /* 2**32 / 1000000 */ usecs /= (loops_per_jiffy*HZ); if (usecs) __delay(usecs); } #endif /* _H8300_DELAY_H */