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# SPDX-License-Identifier: Apache-2.0
file(MAKE_DIRECTORY ${PROJECT_BINARY_DIR}/include/generated)
# Zephyr code can configure itself based on a KConfig'uration with the
# header file autoconf.h. There exists an analogous file
# generated_dts_board_unfixed.h that allows configuration based on information
# encoded in DTS.
#
# Here we call on dtc, the gcc preprocessor, and
# scripts/dts/extract_dts_includes.py to generate this header file at
# CMake configure-time.
#
# See ~/zephyr/doc/dts
set(GENERATED_DTS_BOARD_UNFIXED_H ${PROJECT_BINARY_DIR}/include/generated/generated_dts_board_unfixed.h)
set(GENERATED_DTS_BOARD_CONF ${PROJECT_BINARY_DIR}/include/generated/generated_dts_board.conf)
set_ifndef(DTS_SOURCE ${BOARD_DIR}/${BOARD}.dts)
set_ifndef(DTS_COMMON_OVERLAYS ${ZEPHYR_BASE}/dts/common/common.dts)
# 'DTS_ROOT' is a list of directories where a directory tree with DT
# files may be found. It always includes the application directory and
# ${ZEPHYR_BASE}.
list(APPEND
DTS_ROOT
${APPLICATION_SOURCE_DIR}
${ZEPHYR_BASE}
)
set(dts_files
${DTS_SOURCE}
${DTS_COMMON_OVERLAYS}
${shield_dts_files}
)
# TODO: What to do about non-posix platforms where NOT CONFIG_HAS_DTS (xtensa)?
# Drop support for NOT CONFIG_HAS_DTS perhaps?
if(EXISTS ${DTS_SOURCE})
set(SUPPORTS_DTS 1)
else()
set(SUPPORTS_DTS 0)
endif()
if(SUPPORTS_DTS)
if(DTC_OVERLAY_FILE)
# Convert from space-separated files into file list
string(REPLACE " " ";" DTC_OVERLAY_FILE_AS_LIST ${DTC_OVERLAY_FILE})
list(APPEND
dts_files
${DTC_OVERLAY_FILE_AS_LIST}
)
endif()
set(i 0)
unset(DTC_INCLUDE_FLAG_FOR_DTS)
foreach(dts_file ${dts_files})
list(APPEND DTC_INCLUDE_FLAG_FOR_DTS
-include ${dts_file})
if(i EQUAL 0)
message(STATUS "Loading ${dts_file} as base")
else()
message(STATUS "Overlaying ${dts_file}")
endif()
# Ensure that changes to 'dts_file's cause CMake to be re-run
set_property(DIRECTORY APPEND PROPERTY
CMAKE_CONFIGURE_DEPENDS
${dts_file}
)
math(EXPR i "${i}+1")
endforeach()
foreach(dts_root ${DTS_ROOT})
foreach(dts_root_path
include
dts/common
dts/${ARCH}
dts
)
set(full_path ${dts_root}/${dts_root_path})
if(EXISTS ${full_path})
list(APPEND
DTS_ROOT_SYSTEM_INCLUDE_DIRS
-isystem ${full_path}
)
endif()
endforeach()
endforeach()
foreach(dts_root ${DTS_ROOT})
set(full_path ${dts_root}/dts/bindings)
if(EXISTS ${full_path})
list(APPEND
DTS_ROOT_BINDINGS
${full_path}
)
endif()
endforeach()
# TODO: Cut down on CMake configuration time by avoiding
# regeneration of generated_dts_board_unfixed.h on every configure. How
# challenging is this? What are the dts dependencies? We run the
# preprocessor, and it seems to be including all kinds of
# directories with who-knows how many header files.
# Run the C preprocessor on an empty C source file that has one or
# more DTS source files -include'd into it to create the
# intermediary file *.dts.pre.tmp
execute_process(
COMMAND ${CMAKE_C_COMPILER}
-x assembler-with-cpp
-nostdinc
${DTS_ROOT_SYSTEM_INCLUDE_DIRS}
${DTC_INCLUDE_FLAG_FOR_DTS} # include the DTS source and overlays
${NOSYSDEF_CFLAG}
-D__DTS__
-P
-E ${ZEPHYR_BASE}/misc/empty_file.c
-o ${BOARD}.dts.pre.tmp
WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
RESULT_VARIABLE ret
)
if(NOT "${ret}" STREQUAL "0")
message(FATAL_ERROR "command failed with return code: ${ret}")
endif()
# Run the DTC on *.dts.pre.tmp to create the intermediary file *.dts_compiled
set(DTC_WARN_UNIT_ADDR_IF_ENABLED "")
check_dtc_flag("-Wunique_unit_address_if_enabled" check)
if (check)
set(DTC_WARN_UNIT_ADDR_IF_ENABLED "-Wunique_unit_address_if_enabled")
endif()
set(DTC_NO_WARN_UNIT_ADDR "")
check_dtc_flag("-Wno-unique_unit_address" check)
if (check)
set(DTC_NO_WARN_UNIT_ADDR "-Wno-unique_unit_address")
endif()
execute_process(
COMMAND ${DTC}
-O dts
-o ${BOARD}.dts_compiled
-b 0
-E unit_address_vs_reg
${DTC_NO_WARN_UNIT_ADDR}
${DTC_WARN_UNIT_ADDR_IF_ENABLED}
${EXTRA_DTC_FLAGS} # User settable
${BOARD}.dts.pre.tmp
WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
RESULT_VARIABLE ret
)
if(NOT "${ret}" STREQUAL "0")
message(FATAL_ERROR "command failed with return code: ${ret}")
endif()
set(CMD_EXTRACT_DTS_INCLUDES ${PYTHON_EXECUTABLE} ${ZEPHYR_BASE}/scripts/dts/extract_dts_includes.py
--dts ${BOARD}.dts_compiled
--yaml ${DTS_ROOT_BINDINGS}
--keyvalue ${GENERATED_DTS_BOARD_CONF}
--include ${GENERATED_DTS_BOARD_UNFIXED_H}
--old-alias-names
)
# Run extract_dts_includes.py to create a .conf and a header file that can be
# included into the CMake namespace
execute_process(
COMMAND ${CMD_EXTRACT_DTS_INCLUDES}
WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
RESULT_VARIABLE ret
)
if(NOT "${ret}" STREQUAL "0")
message(FATAL_ERROR "command failed with return code: ${ret}")
endif()
import_kconfig(CONFIG_ ${GENERATED_DTS_BOARD_CONF})
import_kconfig(DT_ ${GENERATED_DTS_BOARD_CONF})
else()
file(WRITE ${GENERATED_DTS_BOARD_UNFIXED_H} "/* WARNING. THIS FILE IS AUTO-GENERATED. DO NOT MODIFY! */")
endif(SUPPORTS_DTS)