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-rw-r--r--include/asm-x86/tsc.h15
1 files changed, 10 insertions, 5 deletions
diff --git a/include/asm-x86/tsc.h b/include/asm-x86/tsc.h
index a4d806610b7f..6baab30dc2c8 100644
--- a/include/asm-x86/tsc.h
+++ b/include/asm-x86/tsc.h
@@ -1,13 +1,14 @@
/*
- * linux/include/asm-i386/tsc.h
- *
- * i386 TSC related functions
+ * x86 TSC related functions
*/
-#ifndef _ASM_i386_TSC_H
-#define _ASM_i386_TSC_H
+#ifndef _ASM_X86_TSC_H
+#define _ASM_X86_TSC_H
#include <asm/processor.h>
+#define NS_SCALE 10 /* 2^10, carefully chosen */
+#define US_SCALE 32 /* 2^32, arbitralrily chosen */
+
/*
* Standard way to access the cycle counter.
*/
@@ -72,4 +73,8 @@ int check_tsc_unstable(void);
extern void check_tsc_sync_source(int cpu);
extern void check_tsc_sync_target(void);
+#ifdef CONFIG_X86_64
+extern void tsc_calibrate(void);
+#endif
+
#endif