diff --git a/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi b/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi
index ceccddb92d40..ffcc0960903b 100644
--- a/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi
@@ -29,6 +29,17 @@ chosen {
 		stdout-path = "serial0:115200n8";
 	};
 
+	memory@c8000000 {
+		device_type = "memory";
+		/* first 128MiB is reserved for secure area. */
+		reg = <0x0 0xc8000000 0x0 0x38000000>;
+	};
+
+	memory@240000000 {
+		device_type = "memory";
+		reg = <0x2 0x40000000 0x1 0xc0000000>;
+	};
+
 	reg_1p8v: regulator-1p8v {
 		compatible = "regulator-fixed";
 		regulator-name = "fixed-1.8V";