diff --git a/plat/arm/board/rde1edge/include/platform_def.h b/plat/arm/board/rde1edge/include/platform_def.h
index a9b30a4..69bfd7b 100644
--- a/plat/arm/board/rde1edge/include/platform_def.h
+++ b/plat/arm/board/rde1edge/include/platform_def.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2021, Arm Limited. All rights reserved.
+ * Copyright (c) 2018-2022, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -26,12 +26,15 @@
 
 #define CSS_SYSTEM_PWR_DMN_LVL		ARM_PWR_LVL3
 
+/* Maximum number of address bits used per chip */
+#define CSS_SGI_ADDR_BITS_PER_CHIP	U(36)
+
 /*
  * Physical and virtual address space limits for MMU in AARCH64 & AARCH32 modes
  */
 #ifdef __aarch64__
-#define PLAT_PHY_ADDR_SPACE_SIZE	(1ULL << 36)
-#define PLAT_VIRT_ADDR_SPACE_SIZE	(1ULL << 36)
+#define PLAT_PHY_ADDR_SPACE_SIZE	(1ULL << CSS_SGI_ADDR_BITS_PER_CHIP)
+#define PLAT_VIRT_ADDR_SPACE_SIZE	(1ULL << CSS_SGI_ADDR_BITS_PER_CHIP)
 #else
 #define PLAT_PHY_ADDR_SPACE_SIZE	(1ULL << 32)
 #define PLAT_VIRT_ADDR_SPACE_SIZE	(1ULL << 32)
diff --git a/plat/arm/board/rdn1edge/include/platform_def.h b/plat/arm/board/rdn1edge/include/platform_def.h
index a61b0d5..de01902 100644
--- a/plat/arm/board/rdn1edge/include/platform_def.h
+++ b/plat/arm/board/rdn1edge/include/platform_def.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2021, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2018-2022, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -30,12 +30,17 @@
 /* Virtual address used by dynamic mem_protect for chunk_base */
 #define PLAT_ARM_MEM_PROTEC_VA_FRAME	UL(0xc0000000)
 
+/* Maximum number of address bits used per chip */
+#define CSS_SGI_ADDR_BITS_PER_CHIP	U(42)
+
 /*
  * Physical and virtual address space limits for MMU in AARCH64 & AARCH32 modes
  */
 #ifdef __aarch64__
-#define PLAT_PHY_ADDR_SPACE_SIZE	(1ULL << 43)
-#define PLAT_VIRT_ADDR_SPACE_SIZE	(1ULL << 43)
+#define PLAT_PHY_ADDR_SPACE_SIZE	CSS_SGI_REMOTE_CHIP_MEM_OFFSET( \
+						CSS_SGI_CHIP_COUNT)
+#define PLAT_VIRT_ADDR_SPACE_SIZE	CSS_SGI_REMOTE_CHIP_MEM_OFFSET( \
+						CSS_SGI_CHIP_COUNT)
 #else
 #define PLAT_PHY_ADDR_SPACE_SIZE	(1ULL << 32)
 #define PLAT_VIRT_ADDR_SPACE_SIZE	(1ULL << 32)
diff --git a/plat/arm/board/rdn2/include/platform_def.h b/plat/arm/board/rdn2/include/platform_def.h
index e4015f7..464a157 100644
--- a/plat/arm/board/rdn2/include/platform_def.h
+++ b/plat/arm/board/rdn2/include/platform_def.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020-2021, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2020-2022, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -69,15 +69,16 @@
  */
 #ifdef __aarch64__
 #if (CSS_SGI_PLATFORM_VARIANT == 2)
+#define CSS_SGI_ADDR_BITS_PER_CHIP	U(46)	/* 64TB */
+#else
+#define CSS_SGI_ADDR_BITS_PER_CHIP	U(42)	/* 4TB */
+#endif
+
 #define PLAT_PHY_ADDR_SPACE_SIZE	CSS_SGI_REMOTE_CHIP_MEM_OFFSET( \
 						CSS_SGI_CHIP_COUNT)
 #define PLAT_VIRT_ADDR_SPACE_SIZE	CSS_SGI_REMOTE_CHIP_MEM_OFFSET( \
 						CSS_SGI_CHIP_COUNT)
 #else
-#define PLAT_PHY_ADDR_SPACE_SIZE	(1ULL << 42)
-#define PLAT_VIRT_ADDR_SPACE_SIZE	(1ULL << 42)
-#endif
-#else
 #define PLAT_PHY_ADDR_SPACE_SIZE	(1ULL << 32)
 #define PLAT_VIRT_ADDR_SPACE_SIZE	(1ULL << 32)
 #endif
diff --git a/plat/arm/board/rdv1/include/platform_def.h b/plat/arm/board/rdv1/include/platform_def.h
index 5b98b4e..620fa3e 100644
--- a/plat/arm/board/rdv1/include/platform_def.h
+++ b/plat/arm/board/rdv1/include/platform_def.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2020-2022, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -46,12 +46,15 @@
 		(TZC_REGION_ACCESS_RDWR(TZC_NSAID_CLCD))   | \
 		(TZC_REGION_ACCESS_RDWR(TZC_NSAID_VIRTIO))
 
+/* Maximum number of address bits used per chip */
+#define CSS_SGI_ADDR_BITS_PER_CHIP	U(42)
+
 /*
  * Physical and virtual address space limits for MMU in AARCH64 & AARCH32 modes
  */
 #ifdef __aarch64__
-#define PLAT_PHY_ADDR_SPACE_SIZE	(1ULL << 42)
-#define PLAT_VIRT_ADDR_SPACE_SIZE	(1ULL << 42)
+#define PLAT_PHY_ADDR_SPACE_SIZE	(1ULL << CSS_SGI_ADDR_BITS_PER_CHIP)
+#define PLAT_VIRT_ADDR_SPACE_SIZE	(1ULL << CSS_SGI_ADDR_BITS_PER_CHIP)
 #else
 #define PLAT_PHY_ADDR_SPACE_SIZE	(1ULL << 32)
 #define PLAT_VIRT_ADDR_SPACE_SIZE	(1ULL << 32)
diff --git a/plat/arm/board/rdv1mc/include/platform_def.h b/plat/arm/board/rdv1mc/include/platform_def.h
index 12ce806..3670904 100644
--- a/plat/arm/board/rdv1mc/include/platform_def.h
+++ b/plat/arm/board/rdv1mc/include/platform_def.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020-2021, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2020-2022, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -46,6 +46,9 @@
 /* Virtual address used by dynamic mem_protect for chunk_base */
 #define PLAT_ARM_MEM_PROTEC_VA_FRAME	UL(0xC0000000)
 
+/* Remote chip address offset (4TB per chip) */
+#define CSS_SGI_ADDR_BITS_PER_CHIP	U(42)
+
 /* Physical and virtual address space limits for MMU in AARCH64 mode */
 #define PLAT_PHY_ADDR_SPACE_SIZE	CSS_SGI_REMOTE_CHIP_MEM_OFFSET( \
 						CSS_SGI_CHIP_COUNT)
diff --git a/plat/arm/board/sgi575/include/platform_def.h b/plat/arm/board/sgi575/include/platform_def.h
index 72d5f7c..82a38c5 100644
--- a/plat/arm/board/sgi575/include/platform_def.h
+++ b/plat/arm/board/sgi575/include/platform_def.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2021, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2018-2022, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -27,12 +27,15 @@
 
 #define PLAT_MAX_PWR_LVL		ARM_PWR_LVL1
 
+/* Maximum number of address bits used per chip */
+#define CSS_SGI_ADDR_BITS_PER_CHIP	U(36)
+
 /*
  * Physical and virtual address space limits for MMU in AARCH64 & AARCH32 modes
  */
 #ifdef __aarch64__
-#define PLAT_PHY_ADDR_SPACE_SIZE	(1ULL << 36)
-#define PLAT_VIRT_ADDR_SPACE_SIZE	(1ULL << 36)
+#define PLAT_PHY_ADDR_SPACE_SIZE	(1ULL << CSS_SGI_ADDR_BITS_PER_CHIP)
+#define PLAT_VIRT_ADDR_SPACE_SIZE	(1ULL << CSS_SGI_ADDR_BITS_PER_CHIP)
 #else
 #define PLAT_PHY_ADDR_SPACE_SIZE	(1ULL << 32)
 #define PLAT_VIRT_ADDR_SPACE_SIZE	(1ULL << 32)
diff --git a/plat/arm/css/sgi/include/sgi_base_platform_def.h b/plat/arm/css/sgi/include/sgi_base_platform_def.h
index 58a153a..8724074 100644
--- a/plat/arm/css/sgi/include/sgi_base_platform_def.h
+++ b/plat/arm/css/sgi/include/sgi_base_platform_def.h
@@ -21,8 +21,9 @@
 
 #define PLAT_ARM_TRUSTED_SRAM_SIZE	0x00040000	/* 256 KB */
 
-/* Remote chip address offset (4TB per chip) */
-#define CSS_SGI_REMOTE_CHIP_MEM_OFFSET(n)	((ULL(1) << 42) * (n))
+/* Remote chip address offset */
+#define CSS_SGI_REMOTE_CHIP_MEM_OFFSET(n)	\
+		((ULL(1) << CSS_SGI_ADDR_BITS_PER_CHIP) * (n))
 
 /*
  * PLAT_ARM_MMAP_ENTRIES depends on the number of entries in the