55f93afd89
When making changes to x86_64 timers, I noticed that touching hpet.h triggered an unreasonably large rebuild. Untangling it from timex.h quiets the extra rebuild quite a bit. Cc: john stultz <johnstul@us.ibm.com> Signed-off-by: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
32 lines
814 B
C
32 lines
814 B
C
/*
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* linux/include/asm-x86_64/timex.h
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*
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* x86-64 architecture timex specifications
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*/
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#ifndef _ASMx8664_TIMEX_H
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#define _ASMx8664_TIMEX_H
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#include <asm/8253pit.h>
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#include <asm/msr.h>
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#include <asm/vsyscall.h>
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#include <asm/system.h>
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#include <asm/processor.h>
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#include <asm/tsc.h>
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#include <linux/compiler.h>
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#define CLOCK_TICK_RATE PIT_TICK_RATE /* Underlying HZ */
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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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#define USEC_PER_TICK (USEC_PER_SEC / HZ)
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#define NSEC_PER_TICK (NSEC_PER_SEC / HZ)
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#define FSEC_PER_TICK (FSEC_PER_SEC / HZ)
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#define NS_SCALE 10 /* 2^10, carefully chosen */
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#define US_SCALE 32 /* 2^32, arbitralrily chosen */
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extern void mark_tsc_unstable(char *msg);
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extern void set_cyc2ns_scale(unsigned long khz);
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#endif
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