diff --git a/package-21.02/kernel/tops/src/inc/tops.h b/package-21.02/kernel/tops/src/inc/tops.h
new file mode 100644
index 0000000..224ed7f
--- /dev/null
+++ b/package-21.02/kernel/tops/src/inc/tops.h
@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (c) 2023 MediaTek Inc. All Rights Reserved.
+ *
+ * Author: Ren-Ting Wang <ren-ting.wang@mediatek.com>
+ */
+
+#ifndef _TOPS_H_
+#define _TOPS_H_
+
+#define CORE_TOPS_MASK				(GENMASK(CORE_TOPS_NUM - 1, 0))
+
+enum core_id {
+	CORE_OFFLOAD_0,
+	CORE_OFFLOAD_1,
+	CORE_OFFLOAD_2,
+	CORE_OFFLOAD_3,
+	CORE_OFFLOAD_NUM,
+	CORE_MGMT = CORE_OFFLOAD_NUM,
+	CORE_TOPS_NUM,
+	CORE_AP = CORE_TOPS_NUM,
+	CORE_MAX,
+};
+#endif /* _TOPS_H_ */