[deliverable/linux.git] / include / asm-x86 / delay_64.h

#ifndef _X8664_DELAY_H
#define _X8664_DELAY_H

/*
 * Copyright (C) 1993 Linus Torvalds
 *
 * Delay routines calling functions in arch/x86_64/lib/delay.c
 */
 
/* Undefined functions to get compile-time errors */
extern void __bad_udelay(void);
extern void __bad_ndelay(void);

extern void __udelay(unsigned long usecs);
extern void __ndelay(unsigned long nsecs);
extern void __const_udelay(unsigned long usecs);
extern void __delay(unsigned long loops);

/* 0x10c7 is 2**32 / 1000000 (rounded up) */
#define udelay(n) (__builtin_constant_p(n) ? \
	((n) > 20000 ? __bad_udelay() : __const_udelay((n) * 0x10c7ul)) : \
	__udelay(n))

/* 0x5 is 2**32 / 1000000000 (rounded up) */
#define ndelay(n) (__builtin_constant_p(n) ? \
       ((n) > 20000 ? __bad_ndelay() : __const_udelay((n) * 5ul)) : \
       __ndelay(n))


#endif /* defined(_X8664_DELAY_H) */
Commit	Line	Data
	1	#ifndef _X8664_DELAY_H
	2	#define _X8664_DELAY_H
	3
	4	/*
	5	* Copyright (C) 1993 Linus Torvalds
	6	*
	7	* Delay routines calling functions in arch/x86_64/lib/delay.c
	8	*/
	9
	10	/* Undefined functions to get compile-time errors */
	11	extern void __bad_udelay(void);
	12	extern void __bad_ndelay(void);
	13
	14	extern void __udelay(unsigned long usecs);
	15	extern void __ndelay(unsigned long nsecs);
	16	extern void __const_udelay(unsigned long usecs);
	17	extern void __delay(unsigned long loops);
	18
	19	/* 0x10c7 is 2*32 / 1000000 (rounded up) /
	20	#define udelay(n) (__builtin_constant_p(n) ? \
	21	((n) > 20000 ? __bad_udelay() : __const_udelay((n) * 0x10c7ul)) : \
	22	__udelay(n))
	23
	24	/* 0x5 is 2*32 / 1000000000 (rounded up) /
	25	#define ndelay(n) (__builtin_constant_p(n) ? \
	26	((n) > 20000 ? __bad_ndelay() : __const_udelay((n) * 5ul)) : \
	27	__ndelay(n))
	28
	29
	30	#endif /* defined(_X8664_DELAY_H) */