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-rw-r--r--arch/x86/include/asm/delay.h31
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..8a0da95b4fc5
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+++ 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 */
11extern void __bad_udelay(void);
12extern void __bad_ndelay(void);
13
14extern void __udelay(unsigned long usecs);
15extern void __ndelay(unsigned long nsecs);
16extern void __const_udelay(unsigned long xloops);
17extern 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
29void use_tsc_delay(void);
30
31#endif /* ASM_X86__DELAY_H */