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1965aae3 PA |
1 | #ifndef _ASM_X86_DELAY_H |
2 | #define _ASM_X86_DELAY_H | |
f1ea0546 TG |
3 | |
4 | /* | |
5 | * Copyright (C) 1993 Linus Torvalds | |
6 | * | |
7 | * Delay routines calling functions in arch/x86/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); | |
5ab24c79 | 16 | extern void __const_udelay(unsigned long xloops); |
f1ea0546 TG |
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 | void use_tsc_delay(void); | |
30 | ||
1965aae3 | 31 | #endif /* _ASM_X86_DELAY_H */ |