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/*

 *      Precise Delay Loops for SuperH

 *

 *      Copyright (C) 1999 Niibe Yutaka & Kaz Kojima

 */

#include <linux/sched.h>

#include <linux/delay.h>

void __delay(unsigned long loops)

{

        __asm__ __volatile__(

                "tst    %0, %0\n\t"

                "1:\t"

                "bf/s   1b\n\t"

                " dt    %0"

                : "=r" (loops)

                : "0" (loops)

                : "t");

}

inline void __const_udelay(unsigned long xloops)

{

        __asm__("dmulu.l        %0, %2\n\t"

                "sts    mach, %0"

                : "=r" (xloops)

                : "0" (xloops), "r" (current_cpu_data.loops_per_jiffy)

                : "macl", "mach");

        __delay(xloops * HZ);

}

void __udelay(unsigned long usecs)

{

        __const_udelay(usecs * 0x000010c6);  /* 2**32 / 1000000 */

}

void __ndelay(unsigned long nsecs)

{

        __const_udelay(nsecs * 5);  /* 2**32 / 1000000000 (rounded up) */

}