diff --git a/plat/st/common/common.mk b/plat/st/common/common.mk
new file mode 100644
index 0000000..b2df9e8
--- /dev/null
+++ b/plat/st/common/common.mk
@@ -0,0 +1,257 @@
+#
+# Copyright (c) 2023, STMicroelectronics - All Rights Reserved
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+RESET_TO_BL2			:=	1
+
+STM32MP_EARLY_CONSOLE		?=	0
+STM32MP_RECONFIGURE_CONSOLE	?=	0
+STM32MP_UART_BAUDRATE		?=	115200
+
+TRUSTED_BOARD_BOOT		?=	0
+STM32MP_USE_EXTERNAL_HEAP	?=	0
+
+# Use secure library from the ROM code for authentication
+STM32MP_CRYPTO_ROM_LIB		?=	0
+
+# Please don't increment this value without good understanding of
+# the monotonic counter
+STM32_TF_VERSION		?=	0
+
+# Enable dynamic memory mapping
+PLAT_XLAT_TABLES_DYNAMIC	:=	1
+
+# STM32 image header binary type for BL2
+STM32_HEADER_BL2_BINARY_TYPE	:=	0x10
+
+TF_CFLAGS			+=	-Wsign-compare
+TF_CFLAGS			+=	-Wformat-signedness
+
+# Boot devices
+STM32MP_EMMC			?=	0
+STM32MP_SDMMC			?=	0
+STM32MP_RAW_NAND		?=	0
+STM32MP_SPI_NAND		?=	0
+STM32MP_SPI_NOR			?=	0
+
+# Put both BL2 and FIP in eMMC boot partition
+STM32MP_EMMC_BOOT		?=	0
+
+# Serial boot devices
+STM32MP_UART_PROGRAMMER		?=	0
+STM32MP_USB_PROGRAMMER		?=	0
+
+$(eval DTC_V = $(shell $(DTC) -v | awk '{print $$NF}'))
+$(eval DTC_VERSION = $(shell printf "%d" $(shell echo ${DTC_V} | cut -d- -f1 | sed "s/\./0/g" | grep -o "[0-9]*")))
+DTC_CPPFLAGS			+=	${INCLUDES}
+DTC_FLAGS			+=	-Wno-unit_address_vs_reg
+ifeq ($(shell test $(DTC_VERSION) -ge 10601; echo $$?),0)
+DTC_FLAGS			+=	-Wno-interrupt_provider
+endif
+
+# Macros and rules to build TF binary
+STM32_TF_ELF_LDFLAGS		:=	--hash-style=gnu --as-needed
+STM32_TF_LINKERFILE		:=	${BUILD_PLAT}/${PLAT}.ld
+
+ASFLAGS				+=	-DBL2_BIN_PATH=\"${BUILD_PLAT}/bl2.bin\"
+
+# Variables for use with stm32image
+STM32IMAGEPATH			?=	tools/stm32image
+STM32IMAGE			?=	${STM32IMAGEPATH}/stm32image${BIN_EXT}
+STM32IMAGE_SRC			:=	${STM32IMAGEPATH}/stm32image.c
+STM32_DEPS			+=	${STM32IMAGE}
+
+FIP_DEPS			+=	dtbs
+STM32MP_HW_CONFIG		:=	${BL33_CFG}
+
+# Add the HW_CONFIG to FIP and specify the same to certtool
+$(eval $(call TOOL_ADD_PAYLOAD,${STM32MP_HW_CONFIG},--hw-config))
+
+# Add the build options to pack Trusted OS Extra1 and Trusted OS Extra2 images
+# in the FIP if the platform requires.
+ifneq ($(BL32_EXTRA1),)
+$(eval $(call TOOL_ADD_IMG,BL32_EXTRA1,--tos-fw-extra1,,$(ENCRYPT_BL32)))
+endif
+ifneq ($(BL32_EXTRA2),)
+$(eval $(call TOOL_ADD_IMG,BL32_EXTRA2,--tos-fw-extra2,,$(ENCRYPT_BL32)))
+endif
+
+# Enable flags for C files
+$(eval $(call assert_booleans,\
+	$(sort \
+		PLAT_XLAT_TABLES_DYNAMIC \
+		STM32MP_EARLY_CONSOLE \
+		STM32MP_EMMC \
+		STM32MP_EMMC_BOOT \
+		STM32MP_RAW_NAND \
+		STM32MP_RECONFIGURE_CONSOLE \
+		STM32MP_SDMMC \
+		STM32MP_SPI_NAND \
+		STM32MP_SPI_NOR \
+		STM32MP_UART_PROGRAMMER \
+		STM32MP_USB_PROGRAMMER \
+)))
+
+$(eval $(call assert_numerics,\
+	$(sort \
+		STM32_TF_VERSION \
+		STM32MP_UART_BAUDRATE \
+)))
+
+$(eval $(call add_defines,\
+	$(sort \
+		PLAT_XLAT_TABLES_DYNAMIC \
+		STM32_TF_VERSION \
+		STM32MP_EARLY_CONSOLE \
+		STM32MP_EMMC \
+		STM32MP_EMMC_BOOT \
+		STM32MP_RAW_NAND \
+		STM32MP_RECONFIGURE_CONSOLE \
+		STM32MP_SDMMC \
+		STM32MP_SPI_NAND \
+		STM32MP_SPI_NOR \
+		STM32MP_UART_BAUDRATE \
+		STM32MP_UART_PROGRAMMER \
+		STM32MP_USB_PROGRAMMER \
+)))
+
+# Include paths and source files
+PLAT_INCLUDES			+=	-Iplat/st/common/include/
+
+include lib/fconf/fconf.mk
+include lib/libfdt/libfdt.mk
+include lib/zlib/zlib.mk
+
+PLAT_BL_COMMON_SOURCES		+=	common/uuid.c					\
+					plat/st/common/stm32mp_common.c
+
+
+include lib/xlat_tables_v2/xlat_tables.mk
+PLAT_BL_COMMON_SOURCES		+=	${XLAT_TABLES_LIB_SRCS}
+
+PLAT_BL_COMMON_SOURCES		+=	drivers/clk/clk.c				\
+					drivers/delay_timer/delay_timer.c		\
+					drivers/delay_timer/generic_delay_timer.c	\
+					drivers/st/clk/stm32mp_clkfunc.c		\
+					drivers/st/ddr/stm32mp_ddr.c			\
+					drivers/st/gpio/stm32_gpio.c			\
+					drivers/st/regulator/regulator_core.c		\
+					drivers/st/regulator/regulator_fixed.c		\
+					plat/st/common/stm32mp_dt.c
+
+BL2_SOURCES			+=	${FCONF_SOURCES} ${FCONF_DYN_SOURCES}
+BL2_SOURCES			+=	$(ZLIB_SOURCES)
+
+BL2_SOURCES			+=	drivers/io/io_fip.c				\
+					plat/st/common/bl2_io_storage.c			\
+					plat/st/common/stm32mp_fconf_io.c
+
+BL2_SOURCES			+=	drivers/io/io_block.c				\
+					drivers/io/io_mtd.c				\
+					drivers/io/io_storage.c
+
+ifneq (${DECRYPTION_SUPPORT},none)
+BL2_SOURCES			+=	drivers/io/io_encrypted.c
+endif
+
+ifeq (${TRUSTED_BOARD_BOOT},1)
+AUTH_SOURCES			:=	drivers/auth/auth_mod.c				\
+					drivers/auth/crypto_mod.c			\
+					drivers/auth/img_parser_mod.c
+
+ifeq (${GENERATE_COT},1)
+TFW_NVCTR_VAL			:=	0
+NTFW_NVCTR_VAL			:=	0
+KEY_SIZE			:=
+KEY_ALG				:=	ecdsa
+HASH_ALG			:=	sha256
+
+ifeq (${SAVE_KEYS},1)
+TRUSTED_WORLD_KEY		?=	${BUILD_PLAT}/trusted.pem
+NON_TRUSTED_WORLD_KEY		?=	${BUILD_PLAT}/non-trusted.pem
+BL32_KEY			?=	${BUILD_PLAT}/trusted_os.pem
+BL33_KEY			?=	${BUILD_PLAT}/non-trusted_os.pem
+endif
+
+endif
+TF_MBEDTLS_KEY_ALG		:=	ecdsa
+
+ifneq (${MBEDTLS_DIR},)
+MBEDTLS_MAJOR=$(shell grep -hP "define MBEDTLS_VERSION_MAJOR" \
+${MBEDTLS_DIR}/include/mbedtls/*.h | grep -oe '\([0-9.]*\)')
+
+ifeq (${MBEDTLS_MAJOR}, 2)
+MBEDTLS_CONFIG_FILE		?=	"<stm32mp1_mbedtls_config-2.h>"
+endif
+
+ifeq (${MBEDTLS_MAJOR}, 3)
+MBEDTLS_CONFIG_FILE		?=	"<stm32mp1_mbedtls_config-3.h>"
+endif
+endif
+
+include drivers/auth/mbedtls/mbedtls_x509.mk
+
+COT_DESC_IN_DTB			:=	1
+AUTH_SOURCES			+=	lib/fconf/fconf_cot_getter.c			\
+					lib/fconf/fconf_tbbr_getter.c			\
+					plat/st/common/stm32mp_crypto_lib.c
+
+BL2_SOURCES			+=	$(AUTH_SOURCES)					\
+					plat/st/common/stm32mp_trusted_boot.c
+endif
+
+ifneq ($(filter 1,${STM32MP_EMMC} ${STM32MP_SDMMC}),)
+BL2_SOURCES			+=	drivers/mmc/mmc.c				\
+					drivers/partition/gpt.c				\
+					drivers/partition/partition.c
+endif
+
+ifneq ($(filter 1,${STM32MP_SPI_NAND} ${STM32MP_SPI_NOR}),)
+BL2_SOURCES			+=	drivers/mtd/spi-mem/spi_mem.c
+endif
+
+ifeq (${STM32MP_RAW_NAND},1)
+$(eval $(call add_define_val,NAND_ONFI_DETECT,1))
+BL2_SOURCES			+=	drivers/mtd/nand/raw_nand.c
+endif
+
+ifeq (${STM32MP_SPI_NAND},1)
+BL2_SOURCES			+=	drivers/mtd/nand/spi_nand.c
+endif
+
+ifeq (${STM32MP_SPI_NOR},1)
+ifneq (${STM32MP_FORCE_MTD_START_OFFSET},)
+$(eval $(call add_define_val,STM32MP_NOR_FIP_OFFSET,${STM32MP_FORCE_MTD_START_OFFSET}))
+endif
+BL2_SOURCES			+=	drivers/mtd/nor/spi_nor.c
+endif
+
+ifneq ($(filter 1,${STM32MP_RAW_NAND} ${STM32MP_SPI_NAND}),)
+ifneq (${STM32MP_FORCE_MTD_START_OFFSET},)
+$(eval $(call add_define_val,STM32MP_NAND_FIP_OFFSET,${STM32MP_FORCE_MTD_START_OFFSET}))
+endif
+BL2_SOURCES			+=	drivers/mtd/nand/core.c
+endif
+
+ifneq ($(filter 1,${STM32MP_UART_PROGRAMMER} ${STM32MP_USB_PROGRAMMER}),)
+BL2_SOURCES			+=	drivers/io/io_memmap.c
+endif
+
+ifeq (${STM32MP_UART_PROGRAMMER},1)
+BL2_SOURCES			+=	plat/st/common/stm32cubeprogrammer_uart.c
+endif
+
+ifeq (${STM32MP_USB_PROGRAMMER},1)
+BL2_SOURCES			+=	drivers/usb/usb_device.c			\
+					plat/st/common/stm32cubeprogrammer_usb.c	\
+					plat/st/common/usb_dfu.c
+endif
+
+BL2_SOURCES			+=	drivers/st/ddr/stm32mp_ddr_test.c		\
+					drivers/st/ddr/stm32mp_ram.c
+
+BL2_SOURCES			+=	common/desc_image_load.c
+
+BL2_SOURCES			+=	lib/optee/optee_utils.c
diff --git a/plat/st/common/common_rules.mk b/plat/st/common/common_rules.mk
new file mode 100644
index 0000000..302624e
--- /dev/null
+++ b/plat/st/common/common_rules.mk
@@ -0,0 +1,79 @@
+#
+# Copyright (c) 2023, STMicroelectronics - All Rights Reserved
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+# Compilation rules
+.PHONY: check_dtc_version stm32image clean_stm32image check_boot_device
+.SUFFIXES:
+
+all: check_dtc_version stm32image ${STM32_TF_STM32}
+
+distclean realclean clean: clean_stm32image
+
+bl2: check_boot_device
+
+check_boot_device:
+	@if [ ${STM32MP_EMMC} != 1 ] && \
+	    [ ${STM32MP_SDMMC} != 1 ] && \
+	    [ ${STM32MP_RAW_NAND} != 1 ] && \
+	    [ ${STM32MP_SPI_NAND} != 1 ] && \
+	    [ ${STM32MP_SPI_NOR} != 1 ] && \
+	    [ ${STM32MP_UART_PROGRAMMER} != 1 ] && \
+	    [ ${STM32MP_USB_PROGRAMMER} != 1 ]; then \
+		echo "No boot device driver is enabled"; \
+		false; \
+	fi
+
+stm32image: ${STM32IMAGE}
+
+${STM32IMAGE}: ${STM32IMAGE_SRC}
+	${Q}${MAKE} CPPFLAGS="" --no-print-directory -C ${STM32IMAGEPATH}
+
+clean_stm32image:
+	${Q}${MAKE} --no-print-directory -C ${STM32IMAGEPATH} clean
+
+check_dtc_version:
+	@if [ ${DTC_VERSION} -lt 10404 ]; then \
+		echo "dtc version too old (${DTC_V}), you need at least version 1.4.4"; \
+		false; \
+	fi
+
+# Create DTB file for BL2
+${BUILD_PLAT}/fdts/%-bl2.dts: fdts/%.dts fdts/${BL2_DTSI} | ${BUILD_PLAT} fdt_dirs
+	@echo '#include "$(patsubst fdts/%,%,$<)"' > $@
+	@echo '#include "${BL2_DTSI}"' >> $@
+
+${BUILD_PLAT}/fdts/%-bl2.dtb: ${BUILD_PLAT}/fdts/%-bl2.dts
+
+${BUILD_PLAT}/$(PLAT)-%.o: ${BUILD_PLAT}/fdts/%-bl2.dtb $(STM32_BINARY_MAPPING) bl2
+	@echo "  AS      $${PLAT}.S"
+	${Q}${AS} ${ASFLAGS} ${TF_CFLAGS} \
+		-DDTB_BIN_PATH=\"$<\" \
+		-c $(word 2,$^) -o $@
+
+$(eval $(call MAKE_LD,${STM32_TF_LINKERFILE},$(STM32_LD_FILE),bl2))
+
+tf-a-%.elf: $(PLAT)-%.o ${STM32_TF_LINKERFILE}
+	@echo "  LDS     $<"
+	${Q}${LD} -o $@ ${STM32_TF_ELF_LDFLAGS} -Map=$(@:.elf=.map) --script ${STM32_TF_LINKERFILE} $<
+
+tf-a-%.bin: tf-a-%.elf
+	${Q}${OC} -O binary $< $@
+	@echo
+	@echo "Built $@ successfully"
+	@echo
+
+tf-a-%.stm32: tf-a-%.bin ${STM32_DEPS}
+	@echo
+	@echo "Generate $@"
+	$(eval LOADADDR = $(shell cat $(@:.stm32=.map) | grep RAM | awk '{print $$2}'))
+	$(eval ENTRY = $(shell cat $(@:.stm32=.map) | grep "__BL2_IMAGE_START" | awk '{print $$1}'))
+	${Q}${STM32IMAGE} -s $< -d $@ \
+		-l $(LOADADDR) -e ${ENTRY} \
+		-v ${STM32_TF_VERSION} \
+		-m ${STM32_HEADER_VERSION_MAJOR} \
+		-n ${STM32_HEADER_VERSION_MINOR} \
+		-b ${STM32_HEADER_BL2_BINARY_TYPE}
+	@echo
diff --git a/plat/st/stm32mp1/platform.mk b/plat/st/stm32mp1/platform.mk
index cddc695..1d93983 100644
--- a/plat/st/stm32mp1/platform.mk
+++ b/plat/st/stm32mp1/platform.mk
@@ -4,28 +4,12 @@
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
+include plat/st/common/common.mk
+
 ARM_CORTEX_A7		:=	yes
 ARM_WITH_NEON		:=	yes
-RESET_TO_BL2		:=	1
 USE_COHERENT_MEM	:=	0
 
-STM32MP_EARLY_CONSOLE	?=	0
-STM32MP_RECONFIGURE_CONSOLE ?=	0
-STM32MP_UART_BAUDRATE	?=	115200
-
-TRUSTED_BOARD_BOOT	?=	0
-STM32MP_USE_EXTERNAL_HEAP ?=	0
-
-# Use secure library from the ROM code for authentication
-STM32MP_CRYPTO_ROM_LIB	?=	0
-
-# Please don't increment this value without good understanding of
-# the monotonic counter
-STM32_TF_VERSION	?=	0
-
-# Enable dynamic memory mapping
-PLAT_XLAT_TABLES_DYNAMIC :=	1
-
 # Default Device tree
 DTB_FILE_NAME		?=	stm32mp157c-ev1.dtb
 
@@ -89,17 +73,11 @@
 endif
 endif
 
-# STM32 image header binary type for BL2
-STM32_HEADER_BL2_BINARY_TYPE:=	0x10
-
 ifeq ($(AARCH32_SP),sp_min)
 # Disable Neon support: sp_min runtime may conflict with non-secure world
 TF_CFLAGS		+=	-mfloat-abi=soft
 endif
 
-TF_CFLAGS		+=	-Wsign-compare
-TF_CFLAGS		+=	-Wformat-signedness
-
 # Not needed for Cortex-A7
 WORKAROUND_CVE_2017_5715:=	0
 WORKAROUND_CVE_2022_23960:=	0
@@ -131,18 +109,6 @@
 STM32_RNG_VER		:=	2
 endif
 
-# Boot devices
-STM32MP_EMMC		?=	0
-STM32MP_SDMMC		?=	0
-STM32MP_RAW_NAND	?=	0
-STM32MP_SPI_NAND	?=	0
-STM32MP_SPI_NOR		?=	0
-STM32MP_EMMC_BOOT	?=	0
-
-# Serial boot devices
-STM32MP_USB_PROGRAMMER	?=	0
-STM32MP_UART_PROGRAMMER	?=	0
-
 # Download load address for serial boot devices
 DWL_BUFFER_BASE 	?=	0xC7000000
 
@@ -159,33 +125,17 @@
 endif
 endif
 
-$(eval DTC_V = $(shell $(DTC) -v | awk '{print $$NF}'))
-$(eval DTC_VERSION = $(shell printf "%d" $(shell echo ${DTC_V} | cut -d- -f1 | sed "s/\./0/g" | grep -o "[0-9]*")))
-DTC_CPPFLAGS		+=	${INCLUDES}
-DTC_FLAGS		+=	-Wno-unit_address_vs_reg
-ifeq ($(shell test $(DTC_VERSION) -ge 10601; echo $$?),0)
-DTC_FLAGS		+=	-Wno-interrupt_provider
-endif
-
 # Macros and rules to build TF binary
-STM32_TF_ELF_LDFLAGS	:=	--hash-style=gnu --as-needed
 STM32_TF_STM32		:=	$(addprefix ${BUILD_PLAT}/tf-a-, $(patsubst %.dtb,%.stm32,$(DTB_FILE_NAME)))
-STM32_TF_LINKERFILE	:=	${BUILD_PLAT}/stm32mp1.ld
+STM32_LD_FILE		:=	plat/st/stm32mp1/stm32mp1.ld.S
+STM32_BINARY_MAPPING	:=	plat/st/stm32mp1/stm32mp1.S
 
-ASFLAGS			+= -DBL2_BIN_PATH=\"${BUILD_PLAT}/bl2.bin\"
 ifeq ($(AARCH32_SP),sp_min)
 # BL32 is built only if using SP_MIN
 BL32_DEP		:= bl32
 ASFLAGS			+= -DBL32_BIN_PATH=\"${BUILD_PLAT}/bl32.bin\"
 endif
 
-# Variables for use with stm32image
-STM32IMAGEPATH		?= tools/stm32image
-STM32IMAGE		?= ${STM32IMAGEPATH}/stm32image${BIN_EXT}
-STM32IMAGE_SRC		:= ${STM32IMAGEPATH}/stm32image.c
-
-FIP_DEPS		+=	dtbs
-STM32MP_HW_CONFIG	:=	${BL33_CFG}
 STM32MP_FW_CONFIG_NAME	:=	$(patsubst %.dtb,%-fw-config.dtb,$(DTB_FILE_NAME))
 STM32MP_FW_CONFIG	:=	${BUILD_PLAT}/fdts/$(STM32MP_FW_CONFIG_NAME)
 ifneq (${AARCH32_SP},none)
@@ -193,8 +143,6 @@
 endif
 # Add the FW_CONFIG to FIP and specify the same to certtool
 $(eval $(call TOOL_ADD_PAYLOAD,${STM32MP_FW_CONFIG},--fw-config))
-# Add the HW_CONFIG to FIP and specify the same to certtool
-$(eval $(call TOOL_ADD_PAYLOAD,${STM32MP_HW_CONFIG},--hw-config))
 ifeq ($(GENERATE_COT),1)
 STM32MP_CFG_CERT	:=	$(BUILD_PLAT)/stm32mp_cfg_cert.crt
 # Add the STM32MP_CFG_CERT to FIP and specify the same to certtool
@@ -203,15 +151,6 @@
 ifeq ($(AARCH32_SP),sp_min)
 STM32MP_TOS_FW_CONFIG	:= $(addprefix ${BUILD_PLAT}/fdts/, $(patsubst %.dtb,%-bl32.dtb,$(DTB_FILE_NAME)))
 $(eval $(call TOOL_ADD_PAYLOAD,${STM32MP_TOS_FW_CONFIG},--tos-fw-config))
-else
-# Add the build options to pack Trusted OS Extra1 and Trusted OS Extra2 images
-# in the FIP if the platform requires.
-ifneq ($(BL32_EXTRA1),)
-$(eval $(call TOOL_ADD_IMG,BL32_EXTRA1,--tos-fw-extra1,,$(ENCRYPT_BL32)))
-endif
-ifneq ($(BL32_EXTRA2),)
-$(eval $(call TOOL_ADD_IMG,BL32_EXTRA2,--tos-fw-extra2,,$(ENCRYPT_BL32)))
-endif
 endif
 
 # Enable flags for C files
@@ -220,20 +159,9 @@
 		PKA_USE_BRAINPOOL_P256T1 \
 		PKA_USE_NIST_P256 \
 		PLAT_TBBR_IMG_DEF \
-		PLAT_XLAT_TABLES_DYNAMIC \
 		STM32MP_CRYPTO_ROM_LIB \
 		STM32MP_DDR_32BIT_INTERFACE \
 		STM32MP_DDR_DUAL_AXI_PORT \
-		STM32MP_EARLY_CONSOLE \
-		STM32MP_EMMC \
-		STM32MP_EMMC_BOOT \
-		STM32MP_RAW_NAND \
-		STM32MP_RECONFIGURE_CONSOLE \
-		STM32MP_SDMMC \
-		STM32MP_SPI_NAND \
-		STM32MP_SPI_NOR \
-		STM32MP_UART_PROGRAMMER \
-		STM32MP_USB_PROGRAMMER \
 		STM32MP_USE_EXTERNAL_HEAP \
 		STM32MP13 \
 		STM32MP15 \
@@ -246,8 +174,6 @@
 		STM32_HEADER_VERSION_MAJOR \
 		STM32_RNG_VER \
 		STM32_TF_A_COPIES \
-		STM32_TF_VERSION \
-		STM32MP_UART_BAUDRATE \
 )))
 
 $(eval $(call add_defines,\
@@ -257,41 +183,22 @@
 		PKA_USE_NIST_P256 \
 		PLAT_PARTITION_MAX_ENTRIES \
 		PLAT_TBBR_IMG_DEF \
-		PLAT_XLAT_TABLES_DYNAMIC \
 		STM32_HASH_VER \
 		STM32_HEADER_VERSION_MAJOR \
 		STM32_RNG_VER \
 		STM32_TF_A_COPIES \
-		STM32_TF_VERSION \
 		STM32MP_CRYPTO_ROM_LIB \
 		STM32MP_DDR_32BIT_INTERFACE \
 		STM32MP_DDR_DUAL_AXI_PORT \
-		STM32MP_EARLY_CONSOLE \
-		STM32MP_EMMC \
-		STM32MP_EMMC_BOOT \
-		STM32MP_RAW_NAND \
-		STM32MP_RECONFIGURE_CONSOLE \
-		STM32MP_SDMMC \
-		STM32MP_SPI_NAND \
-		STM32MP_SPI_NOR \
-		STM32MP_UART_BAUDRATE \
-		STM32MP_UART_PROGRAMMER \
-		STM32MP_USB_PROGRAMMER \
 		STM32MP_USE_EXTERNAL_HEAP \
 		STM32MP13 \
 		STM32MP15 \
 )))
 
 # Include paths and source files
-PLAT_INCLUDES		:=	-Iplat/st/common/include/
 PLAT_INCLUDES		+=	-Iplat/st/stm32mp1/include/
 
-include lib/fconf/fconf.mk
-include lib/libfdt/libfdt.mk
-
-PLAT_BL_COMMON_SOURCES	:=	common/uuid.c						\
-				plat/st/common/stm32mp_common.c				\
-				plat/st/stm32mp1/stm32mp1_private.c
+PLAT_BL_COMMON_SOURCES	+=	plat/st/stm32mp1/stm32mp1_private.c
 
 PLAT_BL_COMMON_SOURCES	+=	drivers/st/uart/aarch32/stm32_console.S
 
@@ -299,28 +206,16 @@
 PLAT_BL_COMMON_SOURCES	+=	plat/st/stm32mp1/stm32mp1_stack_protector.c
 endif
 
-include lib/xlat_tables_v2/xlat_tables.mk
-PLAT_BL_COMMON_SOURCES	+=	${XLAT_TABLES_LIB_SRCS}
-
 PLAT_BL_COMMON_SOURCES	+=	lib/cpus/aarch32/cortex_a7.S
 
 PLAT_BL_COMMON_SOURCES	+=	drivers/arm/tzc/tzc400.c				\
-				drivers/clk/clk.c					\
-				drivers/delay_timer/delay_timer.c			\
-				drivers/delay_timer/generic_delay_timer.c		\
 				drivers/st/bsec/bsec2.c					\
-				drivers/st/clk/stm32mp_clkfunc.c			\
-				drivers/st/ddr/stm32mp_ddr.c				\
 				drivers/st/ddr/stm32mp1_ddr_helpers.c			\
-				drivers/st/gpio/stm32_gpio.c				\
 				drivers/st/i2c/stm32_i2c.c				\
 				drivers/st/iwdg/stm32_iwdg.c				\
 				drivers/st/pmic/stm32mp_pmic.c				\
 				drivers/st/pmic/stpmic1.c				\
-				drivers/st/regulator/regulator_core.c			\
-				drivers/st/regulator/regulator_fixed.c			\
 				drivers/st/reset/stm32mp1_reset.c			\
-				plat/st/common/stm32mp_dt.c				\
 				plat/st/stm32mp1/stm32mp1_dbgmcu.c			\
 				plat/st/stm32mp1/stm32mp1_helper.S			\
 				plat/st/stm32mp1/stm32mp1_syscfg.c
@@ -333,195 +228,54 @@
 PLAT_BL_COMMON_SOURCES	+=	drivers/st/clk/stm32mp1_clk.c
 endif
 
-BL2_SOURCES		+=	${FCONF_SOURCES} ${FCONF_DYN_SOURCES}
-
-BL2_SOURCES		+=	drivers/io/io_fip.c					\
-				plat/st/common/bl2_io_storage.c				\
-				plat/st/common/stm32mp_fconf_io.c			\
-				plat/st/stm32mp1/plat_bl2_mem_params_desc.c		\
+BL2_SOURCES		+=	plat/st/stm32mp1/plat_bl2_mem_params_desc.c		\
 				plat/st/stm32mp1/stm32mp1_fconf_firewall.c
 
-include lib/zlib/zlib.mk
-
 ifeq (${PSA_FWU_SUPPORT},1)
 include drivers/fwu/fwu.mk
 endif
 
-
-BL2_SOURCES		+=	$(ZLIB_SOURCES)
-
-BL2_SOURCES		+=	drivers/io/io_block.c					\
-				drivers/io/io_mtd.c					\
-				drivers/io/io_storage.c					\
-				drivers/st/crypto/stm32_hash.c				\
+BL2_SOURCES		+=	drivers/st/crypto/stm32_hash.c				\
 				plat/st/stm32mp1/bl2_plat_setup.c
 
-ifneq (${DECRYPTION_SUPPORT},none)
-BL2_SOURCES		+=	drivers/io/io_encrypted.c
-endif
-
 ifeq (${TRUSTED_BOARD_BOOT},1)
-AUTH_SOURCES		:=	drivers/auth/auth_mod.c					\
-				drivers/auth/crypto_mod.c				\
-				drivers/auth/img_parser_mod.c
-
-ifeq (${GENERATE_COT},1)
-TFW_NVCTR_VAL		:=	0
-NTFW_NVCTR_VAL		:=	0
-KEY_SIZE		:=
-KEY_ALG			:=	ecdsa
-HASH_ALG		:=	sha256
-
-ifeq (${SAVE_KEYS},1)
-TRUSTED_WORLD_KEY	?=	${BUILD_PLAT}/trusted.pem
-NON_TRUSTED_WORLD_KEY	?=	${BUILD_PLAT}/non-trusted.pem
-BL32_KEY		?=	${BUILD_PLAT}/trusted_os.pem
-BL33_KEY		?=	${BUILD_PLAT}/non-trusted_os.pem
-endif
-
-endif
-TF_MBEDTLS_KEY_ALG 	:=	ecdsa
-
-ifneq (${MBEDTLS_DIR},)
-MBEDTLS_MAJOR=$(shell grep -hP "define MBEDTLS_VERSION_MAJOR" \
-${MBEDTLS_DIR}/include/mbedtls/*.h | grep -oe '\([0-9.]*\)')
-
-ifeq (${MBEDTLS_MAJOR}, 2)
-MBEDTLS_CONFIG_FILE	?=	"<stm32mp1_mbedtls_config-2.h>"
-endif
-
-ifeq (${MBEDTLS_MAJOR}, 3)
-MBEDTLS_CONFIG_FILE	?=	"<stm32mp1_mbedtls_config-3.h>"
-endif
-endif
-
-include drivers/auth/mbedtls/mbedtls_x509.mk
-
-COT_DESC_IN_DTB		:=	1
-AUTH_SOURCES		+=	lib/fconf/fconf_cot_getter.c				\
-				lib/fconf/fconf_tbbr_getter.c				\
-				plat/st/common/stm32mp_crypto_lib.c
-
 ifeq ($(STM32MP13),1)
-AUTH_SOURCES		+=	drivers/st/crypto/stm32_pka.c
-AUTH_SOURCES		+=	drivers/st/crypto/stm32_saes.c
+BL2_SOURCES		+=	drivers/st/crypto/stm32_pka.c
+BL2_SOURCES		+=	drivers/st/crypto/stm32_saes.c
 endif
-
-BL2_SOURCES		+=	$(AUTH_SOURCES)						\
-				plat/st/common/stm32mp_trusted_boot.c
 endif
 
 ifneq ($(filter 1,${STM32MP_EMMC} ${STM32MP_SDMMC}),)
-BL2_SOURCES		+=	drivers/mmc/mmc.c					\
-				drivers/partition/gpt.c					\
-				drivers/partition/partition.c				\
-				drivers/st/mmc/stm32_sdmmc2.c
+BL2_SOURCES		+=	drivers/st/mmc/stm32_sdmmc2.c
 endif
 
 ifeq (${STM32MP_RAW_NAND},1)
-$(eval $(call add_define_val,NAND_ONFI_DETECT,1))
-BL2_SOURCES		+=	drivers/mtd/nand/raw_nand.c				\
-				drivers/st/fmc/stm32_fmc2_nand.c
-endif
-
-ifeq (${STM32MP_SPI_NAND},1)
-BL2_SOURCES		+=	drivers/mtd/nand/spi_nand.c
-endif
-
-ifeq (${STM32MP_SPI_NOR},1)
-ifneq (${STM32MP_FORCE_MTD_START_OFFSET},)
-$(eval $(call add_define_val,STM32MP_NOR_FIP_OFFSET,${STM32MP_FORCE_MTD_START_OFFSET}))
-endif
-BL2_SOURCES		+=	drivers/mtd/nor/spi_nor.c
+BL2_SOURCES		+=	drivers/st/fmc/stm32_fmc2_nand.c
 endif
 
 ifneq ($(filter 1,${STM32MP_SPI_NAND} ${STM32MP_SPI_NOR}),)
-BL2_SOURCES		+=	drivers/mtd/spi-mem/spi_mem.c				\
-				drivers/st/spi/stm32_qspi.c
-endif
-
-ifneq ($(filter 1,${STM32MP_RAW_NAND} ${STM32MP_SPI_NAND}),)
-ifneq (${STM32MP_FORCE_MTD_START_OFFSET},)
-$(eval $(call add_define_val,STM32MP_NAND_FIP_OFFSET,${STM32MP_FORCE_MTD_START_OFFSET}))
-endif
-BL2_SOURCES		+=	drivers/mtd/nand/core.c
+BL2_SOURCES		+=	drivers/st/spi/stm32_qspi.c
 endif
 
 ifneq ($(filter 1,${STM32MP_RAW_NAND} ${STM32MP_SPI_NAND} ${STM32MP_SPI_NOR}),)
 BL2_SOURCES		+=	plat/st/stm32mp1/stm32mp1_boot_device.c
 endif
 
-ifneq ($(filter 1,${STM32MP_UART_PROGRAMMER} ${STM32MP_USB_PROGRAMMER}),)
-BL2_SOURCES		+=	drivers/io/io_memmap.c
-endif
-
 ifeq (${STM32MP_UART_PROGRAMMER},1)
-BL2_SOURCES		+=	drivers/st/uart/stm32_uart.c				\
-				plat/st/common/stm32cubeprogrammer_uart.c
+BL2_SOURCES		+=	drivers/st/uart/stm32_uart.c
 endif
 
 ifeq (${STM32MP_USB_PROGRAMMER},1)
 #The DFU stack uses only one end point, reduce the USB stack footprint
 $(eval $(call add_define_val,CONFIG_USBD_EP_NB,1U))
 BL2_SOURCES		+=	drivers/st/usb/stm32mp1_usb.c				\
-				drivers/usb/usb_device.c				\
-				plat/st/common/stm32cubeprogrammer_usb.c		\
-				plat/st/common/usb_dfu.c					\
 				plat/st/stm32mp1/stm32mp1_usb_dfu.c
 endif
 
-BL2_SOURCES		+=	drivers/st/ddr/stm32mp_ddr_test.c			\
-				drivers/st/ddr/stm32mp_ram.c				\
-				drivers/st/ddr/stm32mp1_ddr.c				\
+BL2_SOURCES		+=	drivers/st/ddr/stm32mp1_ddr.c				\
 				drivers/st/ddr/stm32mp1_ram.c
 
-BL2_SOURCES		+=	common/desc_image_load.c				\
-				plat/st/stm32mp1/plat_image_load.c
-
-BL2_SOURCES		+=	lib/optee/optee_utils.c
-
-# Compilation rules
-.PHONY: check_dtc_version stm32image clean_stm32image check_boot_device
-.SUFFIXES:
-
-all: check_dtc_version stm32image ${STM32_TF_STM32}
-
-distclean realclean clean: clean_stm32image
-
-bl2: check_boot_device
-
-check_boot_device:
-	@if [ ${STM32MP_EMMC} != 1 ] && \
-	    [ ${STM32MP_SDMMC} != 1 ] && \
-	    [ ${STM32MP_RAW_NAND} != 1 ] && \
-	    [ ${STM32MP_SPI_NAND} != 1 ] && \
-	    [ ${STM32MP_SPI_NOR} != 1 ] && \
-	    [ ${STM32MP_UART_PROGRAMMER} != 1 ] && \
-	    [ ${STM32MP_USB_PROGRAMMER} != 1 ]; then \
-		echo "No boot device driver is enabled"; \
-		false; \
-	fi
-
-stm32image: ${STM32IMAGE}
-
-${STM32IMAGE}: ${STM32IMAGE_SRC}
-	${Q}${MAKE} CPPFLAGS="" --no-print-directory -C ${STM32IMAGEPATH}
-
-clean_stm32image:
-	${Q}${MAKE} --no-print-directory -C ${STM32IMAGEPATH} clean
-
-check_dtc_version:
-	@if [ ${DTC_VERSION} -lt 10404 ]; then \
-		echo "dtc version too old (${DTC_V}), you need at least version 1.4.4"; \
-		false; \
-	fi
-
-# Create DTB file for BL2
-${BUILD_PLAT}/fdts/%-bl2.dts: fdts/%.dts fdts/${BL2_DTSI} | ${BUILD_PLAT} fdt_dirs
-	@echo '#include "$(patsubst fdts/%,%,$<)"' > $@
-	@echo '#include "${BL2_DTSI}"' >> $@
-
-${BUILD_PLAT}/fdts/%-bl2.dtb: ${BUILD_PLAT}/fdts/%-bl2.dts
+BL2_SOURCES		+=	plat/st/stm32mp1/plat_image_load.c
 
 ifeq ($(AARCH32_SP),sp_min)
 # Create DTB file for BL32
@@ -532,33 +286,4 @@
 ${BUILD_PLAT}/fdts/%-bl32.dtb: ${BUILD_PLAT}/fdts/%-bl32.dts
 endif
 
-${BUILD_PLAT}/stm32mp1-%.o: ${BUILD_PLAT}/fdts/%-bl2.dtb plat/st/stm32mp1/stm32mp1.S bl2
-	@echo "  AS      stm32mp1.S"
-	${Q}${AS} ${ASFLAGS} ${TF_CFLAGS} \
-		-DDTB_BIN_PATH=\"$<\" \
-		-c plat/st/stm32mp1/stm32mp1.S -o $@
-
-$(eval $(call MAKE_LD,${STM32_TF_LINKERFILE},plat/st/stm32mp1/stm32mp1.ld.S,bl2))
-
-tf-a-%.elf: stm32mp1-%.o ${STM32_TF_LINKERFILE}
-	@echo "  LDS     $<"
-	${Q}${LD} -o $@ ${STM32_TF_ELF_LDFLAGS} -Map=$(@:.elf=.map) --script ${STM32_TF_LINKERFILE} $<
-
-tf-a-%.bin: tf-a-%.elf
-	${Q}${OC} -O binary $< $@
-	@echo
-	@echo "Built $@ successfully"
-	@echo
-
-tf-a-%.stm32: ${STM32IMAGE} tf-a-%.bin
-	@echo
-	@echo "Generate $@"
-	$(eval LOADADDR = $(shell cat $(@:.stm32=.map) | grep RAM | awk '{print $$2}'))
-	$(eval ENTRY = $(shell cat $(@:.stm32=.map) | grep "__BL2_IMAGE_START" | awk '{print $$1}'))
-	${Q}${STM32IMAGE} -s $(word 2,$^) -d $@ \
-		-l $(LOADADDR) -e ${ENTRY} \
-		-v ${STM32_TF_VERSION} \
-		-m ${STM32_HEADER_VERSION_MAJOR} \
-		-n ${STM32_HEADER_VERSION_MINOR} \
-		-b ${STM32_HEADER_BL2_BINARY_TYPE}
-	@echo
+include plat/st/common/common_rules.mk