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-rw-r--r--include/asm-x86/delay_64.h30
1 files changed, 30 insertions, 0 deletions
diff --git a/include/asm-x86/delay_64.h b/include/asm-x86/delay_64.h
new file mode 100644
index 000000000000..c2669f1f5529
--- /dev/null
+++ b/include/asm-x86/delay_64.h
@@ -0,0 +1,30 @@
1#ifndef _X8664_DELAY_H
2#define _X8664_DELAY_H
3
4/*
5 * Copyright (C) 1993 Linus Torvalds
6 *
7 * Delay routines calling functions in arch/x86_64/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 usecs);
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
29
30#endif /* defined(_X8664_DELAY_H) */