138 lines
5.8 KiB
CMake
138 lines
5.8 KiB
CMake
cmake_minimum_required(VERSION 3.5)
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if(NOT SDKCONFIG)
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message(FATAL_ERROR "Bootloader subproject expects the SDKCONFIG variable to be passed "
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"in by the parent build process.")
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endif()
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if(NOT IDF_PATH)
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message(FATAL_ERROR "Bootloader subproject expects the IDF_PATH variable to be passed "
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"in by the parent build process.")
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endif()
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set(COMPONENTS bootloader esptool_py esp32 partition_table soc bootloader_support log spi_flash micro-ecc soc main)
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set(BOOTLOADER_BUILD 1)
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add_definitions(-DBOOTLOADER_BUILD=1)
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set(COMPONENT_REQUIRES_COMMON log esp32 soc)
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include("${IDF_PATH}/tools/cmake/project.cmake")
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project(bootloader)
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target_linker_script(bootloader.elf
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"main/esp32.bootloader.ld"
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"main/esp32.bootloader.rom.ld"
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)
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# as cmake won't attach linker args to a header-only library, attach
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# linker args directly to the bootloader.elf
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set(ESP32_BOOTLOADER_LINKER_SCRIPTS
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"../../esp32/ld/esp32.rom.ld"
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"../../esp32/ld/esp32.rom.spiram_incompatible_fns.ld"
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"../../esp32/ld/esp32.peripherals.ld")
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target_linker_script(bootloader.elf ${ESP32_BOOTLOADER_LINKER_SCRIPTS})
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target_link_libraries(bootloader.elf gcc)
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set(secure_boot_signing_key ${SECURE_BOOT_SIGNING_KEY})
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string(REPLACE ";" " " espsecurepy "${ESPSECUREPY}")
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string(REPLACE ";" " " espefusepy "${ESPEFUSEPY}")
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set(esptoolpy_write_flash "${ESPTOOLPY_WRITE_FLASH_STR}")
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if(CONFIG_SECURE_BOOTLOADER_REFLASHABLE)
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if(CONFIG_SECURE_BOOTLOADER_KEY_ENCODING_192BIT)
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set(key_digest_len 192)
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else()
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set(key_digest_len 256)
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endif()
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get_filename_component(bootloader_digest_bin
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"bootloader-reflash-digest.bin"
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ABSOLUTE BASE_DIR "${CMAKE_BINARY_DIR}")
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get_filename_component(secure_bootloader_key
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"secure-bootloader-key-${key_digest_len}.bin"
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ABSOLUTE BASE_DIR "${CMAKE_BINARY_DIR}")
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add_custom_command(OUTPUT "${secure_bootloader_key}"
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COMMAND ${ESPSECUREPY} digest_private_key
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--keylen "${key_digest_len}"
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--keyfile "${secure_boot_signing_key}"
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"${secure_bootloader_key}"
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VERBATIM)
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if(CONFIG_SECURE_BOOT_BUILD_SIGNED_BINARIES)
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add_custom_target(gen_secure_bootloader_key ALL DEPENDS "${secure_bootloader_key}")
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else()
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if(NOT EXISTS "${secure_bootloader_key}")
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message(FATAL_ERROR
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"No pre-generated key for a reflashable secure bootloader is available, "
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"due to signing configuration."
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"\nTo generate one, you can use this command:"
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"\n\t${espsecurepy} generate_flash_encryption_key ${secure_bootloader_key}"
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"\nIf a signing key is present, then instead use:"
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"\n\t${ESPSECUREPY} digest_private_key "
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"--keylen (192/256) --keyfile KEYFILE "
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"${secure_bootloader_key}")
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endif()
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add_custom_target(gen_secure_bootloader_key)
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endif()
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add_custom_command(OUTPUT "${bootloader_digest_bin}"
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COMMAND ${CMAKE_COMMAND} -E echo "DIGEST ${bootloader_digest_bin}"
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COMMAND ${ESPSECUREPY} digest_secure_bootloader --keyfile "${secure_bootloader_key}"
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-o "${bootloader_digest_bin}" "${CMAKE_BINARY_DIR}/bootloader.bin"
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DEPENDS gen_secure_bootloader_key "${CMAKE_BINARY_DIR}/bootloader.bin"
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VERBATIM)
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add_custom_target (gen_bootloader_digest_bin ALL DEPENDS "${bootloader_digest_bin}")
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endif()
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if(CONFIG_SECURE_BOOTLOADER_ONE_TIME_FLASH)
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add_custom_command(TARGET bootloader POST_BUILD
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COMMAND ${CMAKE_COMMAND} -E echo
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"=============================================================================="
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COMMAND ${CMAKE_COMMAND} -E echo
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"Bootloader built. Secure boot enabled, so bootloader not flashed automatically."
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COMMAND ${CMAKE_COMMAND} -E echo
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"One-time flash command is:"
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COMMAND ${CMAKE_COMMAND} -E echo
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"\t${esptoolpy_write_flash} ${BOOTLOADER_OFFSET} ${CMAKE_BINARY_DIR}/bootloader.bin"
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COMMAND ${CMAKE_COMMAND} -E echo
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"* IMPORTANT: After first boot, BOOTLOADER CANNOT BE RE-FLASHED on same device"
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VERBATIM)
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elseif(CONFIG_SECURE_BOOTLOADER_REFLASHABLE)
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add_custom_command(TARGET bootloader POST_BUILD
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COMMAND ${CMAKE_COMMAND} -E echo
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"=============================================================================="
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COMMAND ${CMAKE_COMMAND} -E echo
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"Bootloader built and secure digest generated."
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COMMAND ${CMAKE_COMMAND} -E echo
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"Secure boot enabled, so bootloader not flashed automatically."
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COMMAND ${CMAKE_COMMAND} -E echo
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"Burn secure boot key to efuse using:"
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COMMAND ${CMAKE_COMMAND} -E echo
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"\t${espefusepy} burn_key secure_boot ${secure_bootloader_key}"
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COMMAND ${CMAKE_COMMAND} -E echo
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"First time flash command is:"
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COMMAND ${CMAKE_COMMAND} -E echo
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"\t${esptoolpy_write_flash} ${BOOTLOADER_OFFSET} ${CMAKE_BINARY_DIR}/bootloader.bin"
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COMMAND ${CMAKE_COMMAND} -E echo
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"=============================================================================="
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COMMAND ${CMAKE_COMMAND} -E echo
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"To reflash the bootloader after initial flash:"
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COMMAND ${CMAKE_COMMAND} -E echo
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"\t${esptoolpy_write_flash} 0x0 ${bootloader_digest_bin}"
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COMMAND ${CMAKE_COMMAND} -E echo
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"=============================================================================="
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COMMAND ${CMAKE_COMMAND} -E echo
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"* After first boot, only re-flashes of this kind (with same key) will be accepted."
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COMMAND ${CMAKE_COMMAND} -E echo
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"* Not recommended to re-use the same secure boot keyfile on multiple production devices."
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DEPENDS gen_secure_bootloader_key gen_bootloader_digest_bin
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VERBATIM)
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endif()
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