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-rw-r--r--src/include/cpu/x86/tsc.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/include/cpu/x86/tsc.h b/src/include/cpu/x86/tsc.h
index 6ce7f5fc7d..8e49a669eb 100644
--- a/src/include/cpu/x86/tsc.h
+++ b/src/include/cpu/x86/tsc.h
@@ -40,4 +40,8 @@ static inline unsigned long long rdtscll(void)
}
#endif
+#if CONFIG_TSC_CONSTANT_RATE
+unsigned long tsc_freq_mhz(void);
+#endif
+
#endif /* CPU_X86_TSC_H */