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| author | john stultz <johnstul@us.ibm.com> | 2006-06-26 00:25:10 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-26 09:58:21 -0700 |
| commit | 539eb11e6e904f2cd4f62908cc5e44d724879721 (patch) | |
| tree | df18c747c5226b138862fb19fad5b1527055b9c9 /include/asm-i386/mach-default/mach_timer.h | |
| parent | 8d016ef1380a2a9a5ca5742ede04334199868f82 (diff) | |
| download | linux-539eb11e6e904f2cd4f62908cc5e44d724879721.tar.gz | |
[PATCH] Time: i386 Conversion - part 2: Rework TSC Support
As part of the i386 conversion to the generic timekeeping infrastructure, this
introduces a new tsc.c file. The code in this file replaces the TSC
initialization, management and access code currently in timer_tsc.c (which
will be removed) that we want to preserve.
The code also introduces the following functionality:
o tsc_khz: like cpu_khz but stores the TSC frequency on systems that do not
change TSC frequency w/ CPU frequency
o check/mark_tsc_unstable: accessor/modifier flag for TSC timekeeping
usability
o minor cleanups to calibration math.
This patch also includes a one line __cpuinitdata fix from Zwane Mwaikambo.
Signed-off-by: John Stultz <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-i386/mach-default/mach_timer.h')
| -rw-r--r-- | include/asm-i386/mach-default/mach_timer.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/asm-i386/mach-default/mach_timer.h b/include/asm-i386/mach-default/mach_timer.h index 4b9703bb0288f4..807992fd4171b7 100644 --- a/include/asm-i386/mach-default/mach_timer.h +++ b/include/asm-i386/mach-default/mach_timer.h @@ -15,7 +15,9 @@ #ifndef _MACH_TIMER_H #define _MACH_TIMER_H -#define CALIBRATE_LATCH (5 * LATCH) +#define CALIBRATE_TIME_MSEC 30 /* 30 msecs */ +#define CALIBRATE_LATCH \ + ((CLOCK_TICK_RATE * CALIBRATE_TIME_MSEC + 1000/2)/1000) static inline void mach_prepare_counter(void) { |