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#ifndef _M68K_DELAY_H

#define _M68K_DELAY_H

/*

 * Copyright (C) 1994 Hamish Macdonald

 *

 * Delay routines, using a pre-computed "loops_per_second" value.

 */

extern __inline__ void __delay(int loops)

{

        __asm__ __volatile__ ("\n\tmovel %0,%/d0\n1:\tsubql #1,%/d0\n\t"

                              "bpls 1b\n"

                : /* no outputs */

                : "g" (loops)

                : "d0");

}

/*

 * 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 __inline__ void udelay(unsigned long usecs)

{

        usecs *= 0x000010c6;            /* 2**32 / 1000000 */

        __asm__ __volatile__ ("mulul %1,%0:%2"

             : "=d" (usecs)

             : "d" (usecs),

               "d" (loops_per_sec));

        __delay(usecs);

}

extern __inline__ unsigned long muldiv(unsigned long a, unsigned long b, unsigned long c)

{

        __asm__ ("mulul %1,%/d0:%0\n\tdivul %2,%/d0:%0"

                 :"=d" (a)

                 :"d" (b),

                 "d" (c),

                 "0" (a)

                 :"d0");

        return a;

}

#endif /* defined(_M68K_DELAY_H) */