boards/arm/nrf9160dk_nrf9160/CMakeLists.txt

# Copyright (c) 2019 Nordic Semiconductor ASA.
# SPDX-License-Identifier: Apache-2.0

if(CONFIG_BOARD_NRF52840_GPIO_RESET)
  zephyr_library()
  zephyr_library_sources(nrf52840_reset.c)
endif()

if (CONFIG_BUILD_WITH_TFM)
	# Set default image versions if not defined elsewhere
	if (NOT DEFINED TFM_IMAGE_VERSION_S)
		set(TFM_IMAGE_VERSION_S 0.0.0+0)
	endif()

	if (NOT DEFINED TFM_IMAGE_VERSION_NS)
		set(TFM_IMAGE_VERSION_NS 0.0.0+0)
	endif()

	set(PREPROCESSED_FILE_S "${CMAKE_BINARY_DIR}/tfm/bl2/ext/mcuboot/CMakeFiles/signing_layout_s.dir/signing_layout_s.o")
	set(PREPROCESSED_FILE_NS "${CMAKE_BINARY_DIR}/tfm/bl2/ext/mcuboot/CMakeFiles/signing_layout_ns.dir/signing_layout_ns.o")
	set(TFM_MCUBOOT_DIR "${ZEPHYR_TFM_MODULE_DIR}/trusted-firmware-m/bl2/ext/mcuboot")

	# Configure which format (full or hash) to include the public key in
	# the image manifest
	if(NOT DEFINED TFM_PUBLIC_KEY_FORMAT)
		set(TFM_PUBLIC_KEY_FORMAT "full")
	endif()

	# Set srec_cat binary name
	find_program(SREC_CAT srec_cat)
	if(${SREC_CAT} STREQUAL SREC_CAT-NOTFOUND)
	    message(FATAL_ERROR "'srec_cat' not found. Please install it, or add it to $PATH.")
	endif()

	#Create and sign for concatenated binary image, should align with the TF-M BL2
	set_property(GLOBAL APPEND PROPERTY extra_post_build_commands

		#Sign secure binary image with public key
		COMMAND ${PYTHON_EXECUTABLE} ${TFM_MCUBOOT_DIR}/scripts/wrapper/wrapper.py
			 --layout ${PREPROCESSED_FILE_S}
			 -k ${CONFIG_TFM_KEY_FILE_S}
			 --public-key-format ${TFM_PUBLIC_KEY_FORMAT}
			 --align 1
			 -v ${TFM_IMAGE_VERSION_S}
			 --pad
			 --pad-header
			 ${ADD_NS_IMAGE_MIN_VER}
			 -s auto
			 -H 0x400
			 $<TARGET_PROPERTY:tfm,TFM_S_BIN_FILE>
			 ${CMAKE_BINARY_DIR}/tfm_s_signed.bin

		#Sign non-secure binary image with public key
		COMMAND ${PYTHON_EXECUTABLE} ${TFM_MCUBOOT_DIR}/scripts/wrapper/wrapper.py
			 --layout ${PREPROCESSED_FILE_NS}
			 -k ${CONFIG_TFM_KEY_FILE_NS}
			 --public-key-format ${TFM_PUBLIC_KEY_FORMAT}
			 --align 1
			 -v ${TFM_IMAGE_VERSION_NS}
			 -s auto
			 ${ADD_S_IMAGE_MIN_VER}
			 -H 0x400
			 ${CMAKE_BINARY_DIR}/zephyr/${KERNEL_BIN_NAME}
			 ${CMAKE_BINARY_DIR}/zephyr_ns_signed.bin

		#Create concatenated binary image from the two independently signed binary files
		COMMAND ${PYTHON_EXECUTABLE} ${TFM_MCUBOOT_DIR}/scripts/assemble.py
		     --layout ${PREPROCESSED_FILE_S}
			 -s ${CMAKE_BINARY_DIR}/tfm_s_signed.bin
			 -n ${CMAKE_BINARY_DIR}/zephyr_ns_signed.bin
			 -o ${CMAKE_BINARY_DIR}/tfm_sign.bin

		#Copy mcuboot.bin
		COMMAND ${CMAKE_COMMAND} -E copy $<TARGET_PROPERTY:tfm,BL2_BIN_FILE> ${CMAKE_BINARY_DIR}/mcuboot.bin

		# Generate an intel hex file from the signed output binary
		COMMAND ${SREC_CAT} ${CMAKE_BINARY_DIR}/tfm_sign.bin
		-binary
		-offset 0x10000
		-o ${CMAKE_BINARY_DIR}/tfm_sign.hex
		-intel

		# Copy tfm_sign.hex to zephyr
		COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_BINARY_DIR}/tfm_sign.hex ${CMAKE_BINARY_DIR}/zephyr/${KERNEL_HEX_NAME}
	)
endif()