129 lines
4.3 KiB
CMake
129 lines
4.3 KiB
CMake
# Zephyr code can configure itself based on a KConfig'uration with the
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# header file autoconf.h. There exists an analogous file
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# generated_dts_board.h that allows configuration based on information
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# encoded in DTS.
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#
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# Here we call on dtc, the gcc preprocessor, and
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# scripts/dts/extract_dts_includes.py to generate this header file at
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# CMake configure-time.
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#
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# See ~/zephyr/doc/dts
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set(GENERATED_DTS_BOARD_H ${PROJECT_BINARY_DIR}/include/generated/generated_dts_board.h)
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set(GENERATED_DTS_BOARD_CONF ${PROJECT_BINARY_DIR}/include/generated/generated_dts_board.conf)
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set_ifndef(DTS_SOURCE ${BOARD_ROOT}/boards/${ARCH}/${BOARD_FAMILY}/${BOARD}.dts)
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set_ifndef(DTS_COMMON_OVERLAYS ${PROJECT_SOURCE_DIR}/dts/common/common.dts)
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message(STATUS "Generating zephyr/include/generated/generated_dts_board.h")
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if(CONFIG_HAS_DTS)
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if(DTC_OVERLAY_FILE)
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# Convert from space-separated files into file list
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string(REPLACE " " ";" DTC_OVERLAY_FILE_AS_LIST ${DTC_OVERLAY_FILE})
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endif()
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# Prepend common overlays
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set(DTC_OVERLAY_FILE_AS_LIST ${DTS_COMMON_OVERLAYS} ${DTC_OVERLAY_FILE_AS_LIST})
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set(
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dts_files
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${DTS_SOURCE}
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${DTC_OVERLAY_FILE_AS_LIST}
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)
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unset(DTC_INCLUDE_FLAG_FOR_DTS)
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foreach(dts_file ${dts_files})
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list(APPEND DTC_INCLUDE_FLAG_FOR_DTS
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-include ${dts_file})
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endforeach()
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# TODO: Cut down on CMake configuration time by avoiding
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# regeneration of generated_dts_board.h on every configure. How
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# challenging is this? What are the dts dependencies? We run the
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# preprocessor, and it seems to be including all kinds of
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# directories with who-knows how many header files.
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# Run the C preprocessor on an empty C source file that has one or
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# more DTS source files -include'd into it to create the
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# intermediary file *.dts.pre.tmp
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execute_process(
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COMMAND ${CMAKE_C_COMPILER}
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-x assembler-with-cpp
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-nostdinc
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-I${PROJECT_SOURCE_DIR}/arch/${ARCH}/soc
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-isystem ${PROJECT_SOURCE_DIR}/include
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-isystem ${PROJECT_SOURCE_DIR}/dts/${ARCH}
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-isystem ${PROJECT_SOURCE_DIR}/dts
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-include ${AUTOCONF_H}
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${DTC_INCLUDE_FLAG_FOR_DTS} # include the DTS source and overlays
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-I${PROJECT_SOURCE_DIR}/dts/common
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-I${PROJECT_SOURCE_DIR}/drivers
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-undef -D__DTS__
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-P
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-E ${ZEPHYR_BASE}/misc/empty_file.c
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-o ${BOARD}.dts.pre.tmp
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WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
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RESULT_VARIABLE ret
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)
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if(NOT "${ret}" STREQUAL "0")
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message(FATAL_ERROR "command failed with return code: ${ret}")
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endif()
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# Run the DTC on *.dts.pre.tmp to create the intermediary file *.dts_compiled
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execute_process(
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COMMAND ${DTC}
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-O dts
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-o ${BOARD}.dts_compiled
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-b 0
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${BOARD}.dts.pre.tmp
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WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
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RESULT_VARIABLE ret
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)
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if(NOT "${ret}" STREQUAL "0")
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message(FATAL_ERROR "command failed with return code: ${ret}")
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endif()
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# Run extract_dts_includes.py for the header file
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# generated_dts_board.h
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set_ifndef(DTS_BOARD_FIXUP_FILE ${BOARD_ROOT}/boards/${ARCH}/${BOARD_FAMILY}/dts.fixup)
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if(EXISTS ${DTS_BOARD_FIXUP_FILE})
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set(DTS_BOARD_FIXUP ${DTS_BOARD_FIXUP_FILE})
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endif()
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set_ifndef(DTS_SOC_FIXUP_FILE ${PROJECT_SOURCE_DIR}/arch/${ARCH}/soc/${SOC_PATH}/dts.fixup)
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if(EXISTS ${DTS_SOC_FIXUP_FILE})
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set(DTS_SOC_FIXUP ${DTS_SOC_FIXUP_FILE})
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endif()
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if(EXISTS ${APPLICATION_SOURCE_DIR}/dts.fixup)
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set(DTS_APP_FIXUP ${APPLICATION_SOURCE_DIR}/dts.fixup)
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endif()
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set(DTS_FIXUPS ${DTS_SOC_FIXUP} ${DTS_BOARD_FIXUP} ${DTS_APP_FIXUP})
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if(NOT "${DTS_FIXUPS}" STREQUAL "")
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set(DTS_FIXUPS --fixup ${DTS_FIXUPS})
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endif()
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set(CMD_EXTRACT_DTS_INCLUDES ${PYTHON_EXECUTABLE} ${PROJECT_SOURCE_DIR}/scripts/dts/extract_dts_includes.py
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--dts ${BOARD}.dts_compiled
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--yaml ${PROJECT_SOURCE_DIR}/dts/bindings
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${DTS_FIXUPS}
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--keyvalue ${GENERATED_DTS_BOARD_CONF}
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--include ${GENERATED_DTS_BOARD_H}
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)
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# Run extract_dts_includes.py to create a .conf and a header file that can be
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# included into the CMake namespace
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execute_process(
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COMMAND ${CMD_EXTRACT_DTS_INCLUDES}
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WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
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RESULT_VARIABLE ret
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)
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if(NOT "${ret}" STREQUAL "0")
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message(FATAL_ERROR "command failed with return code: ${ret}")
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endif()
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import_kconfig(${GENERATED_DTS_BOARD_CONF})
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else()
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file(WRITE ${GENERATED_DTS_BOARD_H} "/* WARNING. THIS FILE IS AUTO-GENERATED. DO NOT MODIFY! */")
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endif()
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