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