diff --git a/plat/arm/board/morello/morello_bl31_setup.c b/plat/arm/board/morello/morello_bl31_setup.c
index 5b91e87..59dd37b 100644
--- a/plat/arm/board/morello/morello_bl31_setup.c
+++ b/plat/arm/board/morello/morello_bl31_setup.c
@@ -8,6 +8,7 @@
 #include <drivers/arm/css/css_mhu_doorbell.h>
 #include <drivers/arm/css/scmi.h>
 #include <drivers/arm/css/sds.h>
+#include <lib/cassert.h>
 #include <plat/arm/common/plat_arm.h>
 
 #include "morello_def.h"
@@ -17,18 +18,21 @@
  * Platform information structure stored in SDS.
  * This structure holds information about platform's DDR
  * size which is an information about multichip setup
- * 	- multichip mode
- * 	- slave_count
- * 	- Local DDR size in GB, DDR memory in master board
- * 	- Remote DDR size in GB, DDR memory in slave board
+ *	- Local DDR size in bytes, DDR memory in master board
+ *	- Remote DDR size in bytes, DDR memory in slave board
+ *	- slave_count
+ *	- multichip mode
  */
 struct morello_plat_info {
-	bool multichip_mode;
+	uint64_t local_ddr_size;
+	uint64_t remote_ddr_size;
 	uint8_t slave_count;
-	uint8_t local_ddr_size;
-	uint8_t remote_ddr_size;
+	bool multichip_mode;
 } __packed;
 
+/* Compile time assertion to ensure the size of structure is 18 bytes */
+CASSERT(sizeof(struct morello_plat_info) == MORELLO_SDS_PLATFORM_INFO_SIZE,
+		assert_invalid_plat_info_size);
 /*
  * BL33 image information structure stored in SDS.
  * This structure holds the source & destination addresses and
@@ -80,6 +84,7 @@
 	int ret;
 	struct morello_plat_info plat_info;
 	struct morello_bl33_info bl33_info;
+	struct morello_plat_info *copy_dest;
 
 	ret = sds_init();
 	if (ret != SDS_OK) {
@@ -99,8 +104,8 @@
 
 	/* Validate plat_info SDS */
 	if ((plat_info.local_ddr_size == 0U)
-		|| (plat_info.local_ddr_size > MORELLO_MAX_DDR_CAPACITY_GB)
-		|| (plat_info.remote_ddr_size > MORELLO_MAX_DDR_CAPACITY_GB)
+		|| (plat_info.local_ddr_size > MORELLO_MAX_DDR_CAPACITY)
+		|| (plat_info.remote_ddr_size > MORELLO_MAX_DDR_CAPACITY)
 		|| (plat_info.slave_count > MORELLO_MAX_SLAVE_COUNT)) {
 		ERROR("platform info SDS is corrupted\n");
 		panic();
@@ -127,5 +132,6 @@
 	 * and platform information should be passed to BL33 using NT_FW_CONFIG
 	 * passing mechanism.
 	 */
-	mmio_write_32(MORELLO_PLATFORM_INFO_BASE, *(uint32_t *)&plat_info);
+	copy_dest = (struct morello_plat_info *)MORELLO_PLATFORM_INFO_BASE;
+	*copy_dest = plat_info;
 }
diff --git a/plat/arm/board/morello/morello_def.h b/plat/arm/board/morello/morello_def.h
index 09db303..793729b 100644
--- a/plat/arm/board/morello/morello_def.h
+++ b/plat/arm/board/morello/morello_def.h
@@ -18,8 +18,8 @@
 /* SDS Platform information defines */
 #define MORELLO_SDS_PLATFORM_INFO_STRUCT_ID	U(8)
 #define MORELLO_SDS_PLATFORM_INFO_OFFSET	U(0)
-#define MORELLO_SDS_PLATFORM_INFO_SIZE		U(4)
-#define MORELLO_MAX_DDR_CAPACITY_GB		U(64)
+#define MORELLO_SDS_PLATFORM_INFO_SIZE		U(18)
+#define MORELLO_MAX_DDR_CAPACITY		U(0x1000000000)
 #define MORELLO_MAX_SLAVE_COUNT			U(16)
 
 /* SDS BL33 image information defines */
@@ -28,6 +28,6 @@
 #define MORELLO_SDS_BL33_INFO_SIZE		U(12)
 
 /* Base address of non-secure SRAM where Platform information will be filled */
-#define MORELLO_PLATFORM_INFO_BASE		UL(0x06008000)
+#define MORELLO_PLATFORM_INFO_BASE		UL(0x06000000)
 
 #endif /* MORELLO_DEF_H */