diff --git a/arch/arm64/boot/dts/renesas/r8a78000-ironhide.dts b/arch/arm64/boot/dts/renesas/r8a78000-ironhide.dts
index a721734fbd5d..ed027a6c356e 100644
--- a/arch/arm64/boot/dts/renesas/r8a78000-ironhide.dts
+++ b/arch/arm64/boot/dts/renesas/r8a78000-ironhide.dts
@@ -20,10 +20,9 @@ chosen {
 		stdout-path = "serial0:1843200n8";
 	};
 
-	memory@60600000 {
+	memory@40000000 {
 		device_type = "memory";
-		/* first 518MiB is reserved for other purposes. */
-		reg = <0x0 0x60600000 0x0 0x5fa00000>;
+		reg = <0x0 0x40000000 0x0 0x80000000>;
 	};
 
 	memory@1080000000 {
@@ -65,6 +64,36 @@ memory@1e00000000 {
 		device_type = "memory";
 		reg = <0x1e 0x00000000 0x1 0x00000000>;
 	};
+
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		/* First 518 MiB is reserved for other purposes. */
+		firmware@40000000 {
+			reg = <0x0 0x40000000 0x0 0x20600000>;
+			no-map;
+		};
+
+		/* Parameters set by IPL. */
+		parameters@8c100000 {
+			reg = <0x0 0x8c100000 0x0 0x00008000>;
+			no-map;
+		};
+
+		/* TFA BL31. */
+		tfa-bl31@8c200000 {
+			reg = <0x0 0x8c200000 0x0 0x00080000>;
+			no-map;
+		};
+
+		/* TEE TZ DRAM. */
+		tee@8c400000 {
+			reg = <0x0 0x8c400000 0x0 0x02000000>;
+			no-map;
+		};
+	};
 };
 
 &extal_clk {