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| author | David Woodhouse <dwmw2@infradead.org> | 2007-10-13 17:58:23 +0400 |
|---|---|---|
| committer | David Woodhouse <dwmw2@infradead.org> | 2007-10-13 17:58:23 +0400 |
| commit | ebf8889bd1fe3615991ff4494635d237280652a2 (patch) | |
| tree | 10fb735717122bbb86474339eac07f26e7ccdf40 /include/asm-x86/delay_64.h | |
| parent | b160292cc216a50fd0cd386b0bda2cd48352c73b (diff) | |
| parent | 752097cec53eea111d087c545179b421e2bde98a (diff) | |
| download | linux-ebf8889bd1fe3615991ff4494635d237280652a2.tar.xz | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'include/asm-x86/delay_64.h')
| -rw-r--r-- | include/asm-x86/delay_64.h | 30 |
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 @@ +#ifndef _X8664_DELAY_H +#define _X8664_DELAY_H + +/* + * Copyright (C) 1993 Linus Torvalds + * + * Delay routines calling functions in arch/x86_64/lib/delay.c + */ + +/* Undefined functions to get compile-time errors */ +extern void __bad_udelay(void); +extern void __bad_ndelay(void); + +extern void __udelay(unsigned long usecs); +extern void __ndelay(unsigned long nsecs); +extern void __const_udelay(unsigned long usecs); +extern void __delay(unsigned long loops); + +/* 0x10c7 is 2**32 / 1000000 (rounded up) */ +#define udelay(n) (__builtin_constant_p(n) ? \ + ((n) > 20000 ? __bad_udelay() : __const_udelay((n) * 0x10c7ul)) : \ + __udelay(n)) + +/* 0x5 is 2**32 / 1000000000 (rounded up) */ +#define ndelay(n) (__builtin_constant_p(n) ? \ + ((n) > 20000 ? __bad_ndelay() : __const_udelay((n) * 5ul)) : \ + __ndelay(n)) + + +#endif /* defined(_X8664_DELAY_H) */ |