kernel-ark/include/asm-x86/delay.h
Thomas Gleixner f1ea05466a x86: unify include/asm/delay_32/64.h
Same file, except for whitespace, comment formatting and the extra
function prototype usc_tsc_delay() in _32.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-10-17 20:17:17 +02:00

32 lines
859 B
C

#ifndef _ASM_X86_DELAY_H
#define _ASM_X86_DELAY_H
/*
* Copyright (C) 1993 Linus Torvalds
*
* Delay routines calling functions in arch/x86/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))
void use_tsc_delay(void);
#endif /* _ASM_X86_DELAY_H */