diff --git a/arch/arm64/kernel/include/arch_rusage.h b/arch/arm64/kernel/include/arch_rusage.h
new file mode 100644
index 00000000..e8409e5a
--- /dev/null
+++ b/arch/arm64/kernel/include/arch_rusage.h
@@ -0,0 +1,34 @@
+#ifndef ARCH_RUSAGE_H_INCLUDED
+#define ARCH_RUSAGE_H_INCLUDED
+
+#include <arch-memory.h>
+
+//#define DEBUG_RUSAGE
+
+extern struct rusage_global *rusage;
+
+#define IHK_OS_PGSIZE_4KB  0
+#define IHK_OS_PGSIZE_16KB 1
+#define IHK_OS_PGSIZE_64KB 2
+
+static inline int rusage_pgsize_to_pgtype(size_t pgsize)
+{
+	int ret = IHK_OS_PGSIZE_4KB;
+	switch (pgsize) {
+	case __PTL1_SIZE:
+		ret = IHK_OS_PGSIZE_4KB;
+		break;
+	case __PTL2_SIZE:
+		ret = IHK_OS_PGSIZE_16KB;
+		break;
+	case __PTL3_SIZE:
+		ret = IHK_OS_PGSIZE_64KB;
+		break;
+	default:
+		kprintf("%s: Error: Unknown pgsize=%ld\n", __FUNCTION__, pgsize);
+		break;
+	}
+	return ret;
+}
+
+#endif /* !defined(ARCH_RUSAGE_H_INCLUDED) */