/* *	Precise Delay Loops for x86-64 * *	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>#include <asm/msr.h>#ifdef CONFIG_SMP#include <asm/smp.h>#endifint read_current_timer(unsigned long *timer_value){	rdtscll(*timer_value);	return 0;}void __delay(unsigned long loops){	unsigned bclock, now;		rdtscl(bclock);	do	{		rep_nop(); 		rdtscl(now);	}	while((now-bclock) < loops);}inline void __const_udelay(unsigned long xloops){	__delay(((xloops * cpu_data[raw_smp_processor_id()].loops_per_jiffy) >> 32) * HZ);}void __udelay(unsigned long usecs){	__const_udelay(usecs * 0x000010c6);  /* 2**32 / 1000000 */}void __ndelay(unsigned long nsecs){	__const_udelay(nsecs * 0x00005);  /* 2**32 / 1000000000 (rounded up) */}