diff --git a/plat/st/common/include/stm32mp_common.h b/plat/st/common/include/stm32mp_common.h
index 4f85679..27ddab0 100644
--- a/plat/st/common/include/stm32mp_common.h
+++ b/plat/st/common/include/stm32mp_common.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018-2019, STMicroelectronics - All Rights Reserved
+ * Copyright (C) 2018-2020, STMicroelectronics - All Rights Reserved
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -87,4 +87,8 @@
  */
 int stm32mp_check_header(boot_api_image_header_t *header, uintptr_t buffer);
 
+/* Functions to map DDR in MMU with non-cacheable attribute, and unmap it */
+int stm32mp_map_ddr_non_cacheable(void);
+int stm32mp_unmap_ddr(void);
+
 #endif /* STM32MP_COMMON_H */
diff --git a/plat/st/common/stm32mp_common.c b/plat/st/common/stm32mp_common.c
index afa87f4..9af1564 100644
--- a/plat/st/common/stm32mp_common.c
+++ b/plat/st/common/stm32mp_common.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -12,6 +12,7 @@
 #include <arch_helpers.h>
 #include <common/debug.h>
 #include <drivers/st/stm32mp_clkfunc.h>
+#include <lib/xlat_tables/xlat_tables_v2.h>
 #include <plat/common/platform.h>
 
 uintptr_t plat_get_ns_image_entrypoint(void)
@@ -151,3 +152,16 @@
 
 	return 0;
 }
+
+int stm32mp_map_ddr_non_cacheable(void)
+{
+	return  mmap_add_dynamic_region(STM32MP_DDR_BASE, STM32MP_DDR_BASE,
+					STM32MP_DDR_MAX_SIZE,
+					MT_NON_CACHEABLE | MT_RW | MT_NS);
+}
+
+int stm32mp_unmap_ddr(void)
+{
+	return  mmap_remove_dynamic_region(STM32MP_DDR_BASE,
+					   STM32MP_DDR_MAX_SIZE);
+}
diff --git a/plat/st/stm32mp1/bl2_plat_setup.c b/plat/st/stm32mp1/bl2_plat_setup.c
index 024dbe0..4a77cd9 100644
--- a/plat/st/stm32mp1/bl2_plat_setup.c
+++ b/plat/st/stm32mp1/bl2_plat_setup.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -130,6 +130,7 @@
 void bl2_platform_setup(void)
 {
 	int ret;
+	uint32_t ddr_ns_size;
 
 	if (dt_pmic_status() > 0) {
 		initialize_pmic();
@@ -141,8 +142,24 @@
 		panic();
 	}
 
+	ddr_ns_size = stm32mp_get_ddr_ns_size();
+	assert(ddr_ns_size > 0U);
+
+	/* Map non secure DDR for BL33 load, now with cacheable attribute */
+	ret = mmap_add_dynamic_region(STM32MP_DDR_BASE, STM32MP_DDR_BASE,
+				      ddr_ns_size, MT_MEMORY | MT_RW | MT_NS);
+	assert(ret == 0);
+
 #ifdef AARCH32_SP_OPTEE
 	INFO("BL2 runs OP-TEE setup\n");
+
+	/* Map secure DDR for OP-TEE paged area */
+	ret = mmap_add_dynamic_region(STM32MP_DDR_BASE + ddr_ns_size,
+				      STM32MP_DDR_BASE + ddr_ns_size,
+				      STM32MP_DDR_S_SIZE,
+				      MT_MEMORY | MT_RW | MT_SECURE);
+	assert(ret == 0);
+
 	/* Initialize tzc400 after DDR initialization */
 	stm32mp1_security_setup();
 #else
@@ -166,14 +183,6 @@
 			MT_CODE | MT_SECURE);
 
 #ifdef AARCH32_SP_OPTEE
-	/* OP-TEE image needs post load processing: keep RAM read/write */
-	mmap_add_region(STM32MP_DDR_BASE + dt_get_ddr_size() -
-			STM32MP_DDR_S_SIZE - STM32MP_DDR_SHMEM_SIZE,
-			STM32MP_DDR_BASE + dt_get_ddr_size() -
-			STM32MP_DDR_S_SIZE - STM32MP_DDR_SHMEM_SIZE,
-			STM32MP_DDR_S_SIZE,
-			MT_MEMORY | MT_RW | MT_SECURE);
-
 	mmap_add_region(STM32MP_OPTEE_BASE, STM32MP_OPTEE_BASE,
 			STM32MP_OPTEE_SIZE,
 			MT_MEMORY | MT_RW | MT_SECURE);
@@ -182,14 +191,7 @@
 	mmap_add_region(BL32_BASE, BL32_BASE,
 			BL32_LIMIT - BL32_BASE,
 			MT_MEMORY | MT_RO | MT_SECURE);
-
 #endif
-	/* Map non secure DDR for BL33 load and DDR training area restore */
-	mmap_add_region(STM32MP_DDR_BASE,
-			STM32MP_DDR_BASE,
-			STM32MP_DDR_MAX_SIZE,
-			MT_MEMORY | MT_RW | MT_NS);
-
 	/* Prevent corruption of preloaded Device Tree */
 	mmap_add_region(DTB_BASE, DTB_BASE,
 			DTB_LIMIT - DTB_BASE,
diff --git a/plat/st/stm32mp1/plat_image_load.c b/plat/st/stm32mp1/plat_image_load.c
index a52db6c..6d7af74 100644
--- a/plat/st/stm32mp1/plat_image_load.c
+++ b/plat/st/stm32mp1/plat_image_load.c
@@ -1,9 +1,11 @@
 /*
- * Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2020, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
+#include <platform_def.h>
+
 #include <common/desc_image_load.h>
 #include <plat/common/platform.h>
 
@@ -21,6 +23,13 @@
  ******************************************************************************/
 bl_load_info_t *plat_get_bl_image_load_info(void)
 {
+	bl_mem_params_node_t *bl33 = get_bl_mem_params_node(BL33_IMAGE_ID);
+	uint32_t ddr_ns_size = stm32mp_get_ddr_ns_size();
+
+	/* Max size is non-secure DDR end address minus image_base */
+	bl33->image_info.image_max_size = STM32MP_DDR_BASE + ddr_ns_size -
+					  bl33->image_info.image_base;
+
 	return get_bl_load_info_from_mem_params_desc();
 }
 
diff --git a/plat/st/stm32mp1/platform.mk b/plat/st/stm32mp1/platform.mk
index bd1a16b..5ce7a9c 100644
--- a/plat/st/stm32mp1/platform.mk
+++ b/plat/st/stm32mp1/platform.mk
@@ -11,6 +11,11 @@
 
 STM32_TF_VERSION	?=	0
 
+# Enable dynamic memory mapping
+PLAT_XLAT_TABLES_DYNAMIC :=	1
+$(eval $(call assert_boolean,PLAT_XLAT_TABLES_DYNAMIC))
+$(eval $(call add_define,PLAT_XLAT_TABLES_DYNAMIC))
+
 # Not needed for Cortex-A7
 WORKAROUND_CVE_2017_5715:=	0
 
@@ -152,8 +157,6 @@
 STM32_TF_STM32		:=	$(addprefix ${BUILD_PLAT}/tf-a-, $(patsubst %.dtb,%.stm32,$(DTB_FILE_NAME)))
 STM32_TF_LINKERFILE	:=	${BUILD_PLAT}/stm32mp1.ld
 
-BL2_CFLAGS	+=	-DPLAT_XLAT_TABLES_DYNAMIC=1
-
 # Variables for use with stm32image
 STM32IMAGEPATH		?= tools/stm32image
 STM32IMAGE		?= ${STM32IMAGEPATH}/stm32image${BIN_EXT}