diff --git a/sys/arm64/time.c b/sys/arm64/time.c
index 8eec58a..f1f89cb 100644
--- a/sys/arm64/time.c
+++ b/sys/arm64/time.c
@@ -12,7 +12,17 @@
 uint64_t
 Time_GetTSC()
 {
-    return 0;
+    uint64_t ui;
+    asm volatile("mrs %0, CNTVCT_EL0" : "=&r" (ui));
+    return ui;
+}
+
+uint64_t
+Time_GetTSCFreq()
+{
+    uint64_t ui;
+    asm volatile("mrs %0, CNTFRQ_EL0" : "=&r" (ui));
+    return ui;
 }
 
 static void