1 #ifndef _I386_DELAY_H
2 #define _I386_DELAY_H
3 
4 /*
5  * Copyright (C) 1993 Linus Torvalds
6  *
7  * Delay routines calling functions in arch/i386/lib/delay.c
8  */
9 
10 extern void __bad_udelay(void);
11 extern void __bad_ndelay(void);
12 
13 extern void __udelay(unsigned long usecs);
14 extern void __ndelay(unsigned long nsecs);
15 extern void __const_udelay(unsigned long usecs);
16 extern void __delay(unsigned long loops);
17 
18 #define udelay(n) (__builtin_constant_p(n) ? \
19 	((n) > 20000 ? __bad_udelay() : __const_udelay((n) * 0x10c6ul)) : \
20 	__udelay(n))
21 
22 #define ndelay(n) (__builtin_constant_p(n) ? \
23 	((n) > 20000 ? __bad_ndelay() : __const_udelay((n) * 5ul)) : \
24 	__ndelay(n))
25 
26 #endif /* defined(_I386_DELAY_H) */
27