diff --git a/include/plat/common/common_def.h b/include/plat/common/common_def.h
index ecec5bc9d..d9168572e 100644
--- a/include/plat/common/common_def.h
+++ b/include/plat/common/common_def.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2024, Arm Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2025, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -43,6 +43,10 @@
 
 #define SZ_1G				UL(0x40000000)
 #define SZ_2G				UL(0x80000000)
+
+#define SZ_1T				UL(0x10000000000)
+
+#define SZ_1P				UL(0x4000000000000)
 #else /* !__aarch64__ */
 #define SZ_32				U(0x00000020)
 #define SZ_64				U(0x00000040)
diff --git a/plat/arm/board/fvp/include/platform_def.h b/plat/arm/board/fvp/include/platform_def.h
index df4be8f7c..25848e490 100644
--- a/plat/arm/board/fvp/include/platform_def.h
+++ b/plat/arm/board/fvp/include/platform_def.h
@@ -54,6 +54,9 @@
 #if ENABLE_RME
 #define PLAT_ARM_RMM_BASE		(RMM_BASE)
 #define PLAT_ARM_RMM_SIZE		(RMM_LIMIT - RMM_BASE)
+
+/* Protected physical address size */
+#define PLAT_ARM_PPS			(64 * SZ_1G)
 #endif
 
 /*
diff --git a/plat/arm/board/neoverse_rd/platform/rdv3/include/platform_def.h b/plat/arm/board/neoverse_rd/platform/rdv3/include/platform_def.h
index b55dbe803..0d0db773b 100644
--- a/plat/arm/board/neoverse_rd/platform/rdv3/include/platform_def.h
+++ b/plat/arm/board/neoverse_rd/platform/rdv3/include/platform_def.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024, Arm Limited and Contributors. All rights reserved.
+ * Copyright (c) 2024-2025, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -48,4 +48,7 @@
  */
 #define PLAT_RSE_COMMS_PAYLOAD_MAX_SIZE	UL(0x1000)
 
+/* Protected physical address size */
+#define PLAT_ARM_PPS			(256 * SZ_1T)
+
 #endif /* PLATFORM_DEF_H */