/* *	Precise Delay Loops for i386 * *	Copyright (C) 1993 Linus Torvalds *	Copyright (C) 1997 Martin Mares <mj@atrey.karlin.mff.cuni.cz> * *	The __delay function must _NOT_ be inlined as its execution time *	depends wildly on alignment on many x86 processors.  */#include <linux/config.h>#include <linux/sched.h>#include <linux/delay.h>#include <asm/delay.h>#ifdef CONFIG_SMP#include <asm/smp.h>#endifvoid __delay(unsigned long loops){#ifndef CONFIG_SIMNOW	unsigned long bclock, now;		rdtscl(bclock);	do	{		rep_nop(); 		rdtscl(now);	}	while((now-bclock) < loops);#endif}inline void __const_udelay(unsigned long xloops){        __delay(((xloops * current_cpu_data.loops_per_jiffy) >> 32) * HZ);}void __udelay(unsigned long usecs){	__const_udelay(usecs * 0x000010c6);  /* 2**32 / 1000000 */}