diff --git a/fdts/tc.dts b/fdts/tc.dts
index 4b60189..63f6c3d 100644
--- a/fdts/tc.dts
+++ b/fdts/tc.dts
@@ -337,13 +337,13 @@
 			linux,cma-default;
 		};
 
-		optee@f8e00000 {
+		optee {
 			compatible = "restricted-dma-pool";
-			reg = <0x00000000 0xf8e00000 0 0x00200000>;
+			reg = <0x0 TC_NS_OPTEE_BASE 0x0 TC_NS_OPTEE_SIZE>;
 		};
 
-		fwu_mm@fca00000 {
-			reg = <0x00000000 0xfca00000 0 0x00400000>;
+		fwu_mm {
+			reg = <0x0 TC_NS_FWU_BASE 0x0 TC_NS_FWU_SIZE>;
 			no-map;
 		};
 	};
diff --git a/plat/arm/board/tc/fdts/tc_spmc_manifest.dtsi b/plat/arm/board/tc/fdts/tc_spmc_manifest.dtsi
index 045bba5..3bc0cbb 100644
--- a/plat/arm/board/tc/fdts/tc_spmc_manifest.dtsi
+++ b/plat/arm/board/tc/fdts/tc_spmc_manifest.dtsi
@@ -3,6 +3,8 @@
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
+#include <platform_def.h>
+
 / {
 	compatible = "arm,ffa-core-manifest-1.0";
 	#address-cells = <2>;
@@ -88,9 +90,10 @@
 		};
 	};
 
+	/* the full secure world range */
 	memory@0 {
 		device_type = "memory";
-		reg = <0x0 0xf9000000 0x0 0x6000000>,
+		reg = <0x0 TC_TZC_DRAM1_BASE 0x0 TC_TZC_DRAM1_SIZE>,
 		      <0x0 0xff000000 0x0 0x1000000>;
 	};
 
@@ -100,7 +103,8 @@
 #ifdef TS_SP_FW_CONFIG
 		      <0x0 0x08000000 0x0 0x4000000>,
 #endif /* TS_SP_FW_CONFIG */
-		      <0x0 0x80000000 0x0 0x79000000>,
-		      <0x80 0x80000000 0x1 0x80000000>;
+		      <0x0 TC_NS_DRAM1_BASE 0x0 TC_NS_DRAM1_SIZE>,
+		      <HI(PLAT_ARM_DRAM2_BASE) LO(PLAT_ARM_DRAM2_BASE)
+		       HI(TC_NS_DRAM2_SIZE) LO(TC_NS_DRAM2_SIZE)>;
 	};
 };
diff --git a/plat/arm/board/tc/include/platform_def.h b/plat/arm/board/tc/include/platform_def.h
index 86fbf49..130111e 100644
--- a/plat/arm/board/tc/include/platform_def.h
+++ b/plat/arm/board/tc/include/platform_def.h
@@ -28,6 +28,12 @@
  *   - Region to load secure partitions
  *
  *
+ *  0xf8a0_0000  ------------------   TC_NS_FWU_BASE
+ *               |    FWU shmem   |
+ *               |      (4MB)     |
+ *  0xf8e0_0000  ------------------   TC_NS_OPTEE_BASE
+ *               |  OP-TEE shmem  |
+ *               |      (2MB)     |
  *  0xF900_0000  ------------------   TC_TZC_DRAM1_BASE
  *               |                |
  *               |      SPMC      |
@@ -54,6 +60,10 @@
 					 TC_TZC_DRAM1_SIZE)
 #define TC_NS_DRAM1_END			(TC_NS_DRAM1_BASE + TC_NS_DRAM1_SIZE - 1)
 
+#define TC_NS_OPTEE_SIZE		(2 * SZ_1M)
+#define TC_NS_OPTEE_BASE		(TC_NS_DRAM1_BASE + TC_NS_DRAM1_SIZE - TC_NS_OPTEE_SIZE)
+#define TC_NS_FWU_SIZE			(4 * SZ_1M)
+#define TC_NS_FWU_BASE			(TC_NS_OPTEE_BASE - TC_NS_FWU_SIZE)
 
 /*
  * Mappings for TC DRAM1 (non-secure) and TC TZC DRAM1 (secure)