diff options
Diffstat (limited to 'include/asm-i386/tsc.h')
-rw-r--r-- | include/asm-i386/tsc.h | 49 |
1 files changed, 1 insertions, 48 deletions
diff --git a/include/asm-i386/tsc.h b/include/asm-i386/tsc.h index c13933185c1..e997891cc7c 100644 --- a/include/asm-i386/tsc.h +++ b/include/asm-i386/tsc.h @@ -1,48 +1 @@ -/* - * linux/include/asm-i386/tsc.h - * - * i386 TSC related functions - */ -#ifndef _ASM_i386_TSC_H -#define _ASM_i386_TSC_H - -#include <asm/processor.h> - -/* - * Standard way to access the cycle counter on i586+ CPUs. - * Currently only used on SMP. - * - * If you really have a SMP machine with i486 chips or older, - * compile for that, and this will just always return zero. - * That's ok, it just means that the nicer scheduling heuristics - * won't work for you. - * - * We only use the low 32 bits, and we'd simply better make sure - * that we reschedule before that wraps. Scheduling at least every - * four billion cycles just basically sounds like a good idea, - * regardless of how fast the machine is. - */ -typedef unsigned long long cycles_t; - -extern unsigned int cpu_khz; -extern unsigned int tsc_khz; - -static inline cycles_t get_cycles(void) -{ - unsigned long long ret = 0; - -#ifndef CONFIG_X86_TSC - if (!cpu_has_tsc) - return 0; -#endif - -#if defined(CONFIG_X86_GENERIC) || defined(CONFIG_X86_TSC) - rdtscll(ret); -#endif - return ret; -} - -extern void tsc_init(void); -extern void mark_tsc_unstable(void); - -#endif +#include <asm-x86_64/tsc.h> |