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#ifndef _I386_DELAY_H

#define _I386_DELAY_H

/*

 * Copyright (C) 1993 Linus Torvalds

 *

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

 */

#include <linux/linkage.h>

#ifdef __SMP__

#include <asm/smp.h>

#endif 

extern void __do_delay(void);   /* Special register call calling convention */

extern __inline__ void __delay(int loops)

{

        __asm__ __volatile__(

                "call " SYMBOL_NAME_STR(__do_delay)

                :/* no outputs */

                :"a" (loops)

                :"ax");

}

/*

 * division by multiplication: you don't have to worry about

 * loss of precision.

 *

 * 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__("mull %0"

                :"=d" (usecs)

#ifdef __SMP__

                :"a" (usecs),"0" (cpu_data[smp_processor_id()].udelay_val)

#else

                :"a" (usecs),"0" (loops_per_sec)

#endif

                :"ax");

        __delay(usecs);

}

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

{

        __asm__("mull %1 ; divl %2"

                :"=a" (a)

                :"d" (b),

                 "r" (c),

                 "0" (a)

                :"dx");

        return a;

}

#endif /* defined(_I386_DELAY_H) */