diff options
Diffstat (limited to 'include/asm-x86_64/tsc.h')
-rw-r--r-- | include/asm-x86_64/tsc.h | 67 |
1 files changed, 1 insertions, 66 deletions
diff --git a/include/asm-x86_64/tsc.h b/include/asm-x86_64/tsc.h index 9a0a368852c..d66ba6ef25f 100644 --- a/include/asm-x86_64/tsc.h +++ b/include/asm-x86_64/tsc.h @@ -1,66 +1 @@ -/* - * linux/include/asm-x86_64/tsc.h - * - * x86_64 TSC related functions - */ -#ifndef _ASM_x86_64_TSC_H -#define _ASM_x86_64_TSC_H - -#include <asm/processor.h> - -/* - * Standard way to access the cycle counter. - */ -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; -} - -/* Like get_cycles, but make sure the CPU is synchronized. */ -static __always_inline cycles_t get_cycles_sync(void) -{ - unsigned long long ret; -#ifdef X86_FEATURE_SYNC_RDTSC - unsigned eax; - - /* - * Don't do an additional sync on CPUs where we know - * RDTSC is already synchronous: - */ - alternative_io("cpuid", ASM_NOP2, X86_FEATURE_SYNC_RDTSC, - "=a" (eax), "0" (1) : "ebx","ecx","edx","memory"); -#else - sync_core(); -#endif - rdtscll(ret); - - return ret; -} - -extern void tsc_init(void); -extern void mark_tsc_unstable(void); -extern int unsynchronized_tsc(void); - -/* - * Boot-time check whether the TSCs are synchronized across - * all CPUs/cores: - */ -extern void check_tsc_sync_source(int cpu); -extern void check_tsc_sync_target(void); - -#endif +#include <asm-i386/tsc.h> |