diff --git a/plat/mediatek/drivers/apusys/apusys_rv/2.0/apusys_rv.h b/plat/mediatek/drivers/apusys/apusys_rv/2.0/apusys_rv.h
new file mode 100644
index 0000000..f21835e
--- /dev/null
+++ b/plat/mediatek/drivers/apusys/apusys_rv/2.0/apusys_rv.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2023, MediaTek Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef APUSYS_RV_H
+#define APUSYS_RV_H
+
+#include <platform_def.h>
+
+/* APU MBOX */
+#define MBOX_FUNC_CFG		(0xb0)
+#define MBOX_DOMAIN_CFG		(0xe0)
+#define MBOX_CTRL_LOCK		BIT(0)
+#define MBOX_NO_MPU_SHIFT	(16)
+#define MBOX_RX_NS_SHIFT	(16)
+#define MBOX_RX_DOMAIN_SHIFT	(17)
+#define MBOX_TX_NS_SHIFT	(24)
+#define MBOX_TX_DOMAIN_SHIFT	(25)
+#define MBOX_SIZE		(0x100)
+#define MBOX_NUM		(8)
+
+#define APU_MBOX(i)		(((i) < MBOX_NUM) ? (APU_MBOX0 + MBOX_SIZE * (i)) : \
+						  (APU_MBOX1 + MBOX_SIZE * ((i) - MBOX_NUM)))
+#define APU_MBOX_FUNC_CFG(i)	(APU_MBOX(i) + MBOX_FUNC_CFG)
+#define APU_MBOX_DOMAIN_CFG(i)	(APU_MBOX(i) + MBOX_DOMAIN_CFG)
+
+void apusys_rv_mbox_mpu_init(void);
+
+#endif /* APUSYS_RV_H */