539eb11e6e
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>
23 lines
457 B
C
23 lines
457 B
C
/*
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* linux/include/asm-i386/timex.h
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*
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* i386 architecture timex specifications
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*/
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#ifndef _ASMi386_TIMEX_H
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#define _ASMi386_TIMEX_H
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#include <asm/processor.h>
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#include <asm/tsc.h>
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#ifdef CONFIG_X86_ELAN
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# define CLOCK_TICK_RATE 1189200 /* AMD Elan has different frequency! */
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#else
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# define CLOCK_TICK_RATE 1193182 /* Underlying HZ */
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#endif
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extern int read_current_timer(unsigned long *timer_value);
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#define ARCH_HAS_READ_CURRENT_TIMER 1
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#endif
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