boards/arm/nrf5340dk_nrf5340/CMakeLists.txt

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

if (((CONFIG_BOARD_NRF5340PDK_NRF5340_CPUAPP OR CONFIG_BOARD_NRF5340PDK_NRF5340_CPUAPPNS)
    OR (CONFIG_BOARD_NRF5340DK_NRF5340_CPUAPP OR CONFIG_BOARD_NRF5340DK_NRF5340_CPUAPPNS))
    AND CONFIG_BOARD_ENABLE_CPUNET)
zephyr_library()
zephyr_library_sources(nrf5340_cpunet_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()

	if (NOT CONFIG_TFM_BL2_FALSE)
		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")
	endif()

	# 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()

	if(CONFIG_BOARD_NRF5340PDK_NRF5340_CPUAPPNS)
		set(TFM_INSTALL_DIR ${CMAKE_BINARY_DIR}/tfm/install/outputs/NORDIC_NRF/NRF5340PDK_NRF5340_CPUAPP)
	elseif(CONFIG_BOARD_NRF5340DK_NRF5340_CPUAPPNS)
		set(TFM_INSTALL_DIR ${CMAKE_BINARY_DIR}/tfm/install/outputs/NORDIC_NRF/NRF5340DK_NRF5340_CPUAPP)
	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()

	if (CONFIG_TFM_BL2_FALSE)
		# Merge tfm_s and zephyr (NS) image to a single binary.
		set_property(GLOBAL APPEND PROPERTY extra_post_build_commands
			COMMAND ${SREC_CAT}
			ARGS ${CMAKE_BINARY_DIR}/tfm/bin/tfm_s.bin -Binary
				${CMAKE_BINARY_DIR}/zephyr/${KERNEL_BIN_NAME} -Binary
				-offset ${CONFIG_FLASH_LOAD_OFFSET}
				-o ${CMAKE_BINARY_DIR}/tfm_merged.hex -intel

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