diff options
Diffstat (limited to 'arch/x86/include/asm/delay.h')
-rw-r--r-- | arch/x86/include/asm/delay.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/x86/include/asm/delay.h b/arch/x86/include/asm/delay.h new file mode 100644 index 000000000000..409a649204aa --- /dev/null +++ b/arch/x86/include/asm/delay.h | |||
@@ -0,0 +1,31 @@ | |||
1 | #ifndef _ASM_X86_DELAY_H | ||
2 | #define _ASM_X86_DELAY_H | ||
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); | ||
16 | extern void __const_udelay(unsigned long xloops); | ||
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 | |||
31 | #endif /* _ASM_X86_DELAY_H */ | ||