blob: e0edb90b568df2d259d9f2040b7fec8ef63e1614 [file] [log] [blame]
# SPDX-License-Identifier: Apache-2.0
include_guard(GLOBAL)
include(extensions)
include(python)
include(boards)
include(generic_toolchain)
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 devicetree_unfixed.h
# that allows configuration based on information encoded in DTS.
#
# Here we call on dtc, the gcc preprocessor and
# scripts/dts/gen_defines.py to generate various DT-related files at
# CMake configure-time.
#
# See the Devicetree user guide in the Zephyr documentation for details.
set(GEN_DEFINES_SCRIPT ${ZEPHYR_BASE}/scripts/dts/gen_defines.py)
set(ZEPHYR_DTS ${PROJECT_BINARY_DIR}/zephyr.dts)
# This contains the edtlib.EDT object created from zephyr.dts in Python's
# pickle data marshalling format (https://docs.python.org/3/library/pickle.html)
#
# Its existence is an implementation detail used to speed up further
# use of the devicetree by processes that run later on in the build,
# and should not be made part of the documentation.
set(EDT_PICKLE ${PROJECT_BINARY_DIR}/edt.pickle)
set(DEVICETREE_UNFIXED_H ${PROJECT_BINARY_DIR}/include/generated/devicetree_unfixed.h)
set(DEVICE_EXTERN_H ${PROJECT_BINARY_DIR}/include/generated/device_extern.h)
set(DTS_POST_CPP ${PROJECT_BINARY_DIR}/zephyr.dts.pre)
set(DTS_DEPS ${PROJECT_BINARY_DIR}/zephyr.dts.d)
# The location of a list of known vendor prefixes.
# This is relative to each element of DTS_ROOT.
set(VENDOR_PREFIXES dts/bindings/vendor-prefixes.txt)
# Devicetree in CMake.
set(DTS_CMAKE_SCRIPT ${ZEPHYR_BASE}/scripts/dts/gen_dts_cmake.py)
set(DTS_CMAKE ${PROJECT_BINARY_DIR}/dts.cmake)
set_ifndef(DTS_SOURCE ${BOARD_DIR}/${BOARD}.dts)
zephyr_file(APPLICATION_ROOT DTS_ROOT)
# 'DTS_ROOT' is a list of directories where a directory tree with DT
# files may be found. It always includes the application directory,
# the board directory, and ${ZEPHYR_BASE}.
list(APPEND
DTS_ROOT
${APPLICATION_SOURCE_DIR}
${BOARD_DIR}
${SHIELD_DIRS}
${ZEPHYR_BASE}
)
# DTS directories can come from multiple places. Some places like a
# user's CMakeLists.txt can preserve symbolic links. Others like
# scripts/zephyr_module.py --settings-out resolve them.
unset(real_dts_root)
foreach(dts_dir ${DTS_ROOT})
file(REAL_PATH ${dts_dir} real_dts_dir)
list(APPEND real_dts_root ${real_dts_dir})
endforeach()
set(DTS_ROOT ${real_dts_root})
list(REMOVE_DUPLICATES
DTS_ROOT
)
# 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)
if(BOARD_REVISION AND EXISTS ${BOARD_DIR}/${BOARD}_${BOARD_REVISION_STRING}.overlay)
list(APPEND DTS_SOURCE ${BOARD_DIR}/${BOARD}_${BOARD_REVISION_STRING}.overlay)
endif()
else()
set(SUPPORTS_DTS 0)
endif()
set(dts_files
${DTS_SOURCE}
${shield_dts_files}
)
if(SUPPORTS_DTS)
if(DTC_OVERLAY_FILE)
# Convert from space-separated files into file list
string(REPLACE " " ";" DTC_OVERLAY_FILE_RAW_LIST "${DTC_OVERLAY_FILE}")
foreach(file ${DTC_OVERLAY_FILE_RAW_LIST})
file(TO_CMAKE_PATH "${file}" cmake_path_file)
list(APPEND DTC_OVERLAY_FILE_AS_LIST ${cmake_path_file})
endforeach()
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 "Found BOARD.dts: ${dts_file}")
else()
message(STATUS "Found devicetree overlay: ${dts_file}")
endif()
math(EXPR i "${i}+1")
endforeach()
unset(DTS_ROOT_SYSTEM_INCLUDE_DIRS)
unset(DTS_ROOT_BINDINGS)
foreach(dts_root ${DTS_ROOT})
foreach(dts_root_path
include
include/zephyr
dts/common
dts/${ARCH}
dts
)
get_filename_component(full_path ${dts_root}/${dts_root_path} REALPATH)
if(EXISTS ${full_path})
list(APPEND
DTS_ROOT_SYSTEM_INCLUDE_DIRS
-isystem ${full_path}
)
endif()
endforeach()
set(bindings_path ${dts_root}/dts/bindings)
if(EXISTS ${bindings_path})
list(APPEND
DTS_ROOT_BINDINGS
${bindings_path}
)
endif()
set(vendor_prefixes ${dts_root}/${VENDOR_PREFIXES})
if(EXISTS ${vendor_prefixes})
list(APPEND EXTRA_GEN_DEFINES_ARGS --vendor-prefixes ${vendor_prefixes})
endif()
endforeach()
# Cache the location of the root bindings so they can be used by
# scripts which use the build directory.
set(CACHED_DTS_ROOT_BINDINGS ${DTS_ROOT_BINDINGS} CACHE INTERNAL
"DT bindings root directories")
if(NOT DEFINED CMAKE_DTS_PREPROCESSOR)
set(CMAKE_DTS_PREPROCESSOR ${CMAKE_C_COMPILER})
endif()
# TODO: Cut down on CMake configuration time by avoiding
# regeneration of devicetree_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 preprocessor on the DTS input files. We are leaving
# linemarker directives enabled on purpose. This tells dtlib where
# each line actually came from, which improves error reporting.
execute_process(
COMMAND ${CMAKE_DTS_PREPROCESSOR}
-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__
${DTS_EXTRA_CPPFLAGS}
-E # Stop after preprocessing
-MD # Generate a dependency file as a side-effect
-MF ${DTS_DEPS}
-o ${DTS_POST_CPP}
${ZEPHYR_BASE}/misc/empty_file.c
WORKING_DIRECTORY ${APPLICATION_SOURCE_DIR}
RESULT_VARIABLE ret
)
if(NOT "${ret}" STREQUAL "0")
message(FATAL_ERROR "command failed with return code: ${ret}")
endif()
# Parse the generated dependency file to find the DT sources that
# were included, including any transitive includes, and then add
# them to the list of files that trigger a re-run of CMake.
toolchain_parse_make_rule(${DTS_DEPS}
include_files # Output parameter
)
set_property(DIRECTORY APPEND PROPERTY
CMAKE_CONFIGURE_DEPENDS
${include_files}
${GEN_DEFINES_SCRIPT}
${DTS_CMAKE_SCRIPT}
)
#
# Run gen_defines.py to create a header file, zephyr.dts, and edt.pickle.
#
string(REPLACE ";" " " EXTRA_DTC_FLAGS_RAW "${EXTRA_DTC_FLAGS}")
set(CMD_EXTRACT ${PYTHON_EXECUTABLE} ${GEN_DEFINES_SCRIPT}
--dts ${DTS_POST_CPP}
--dtc-flags '${EXTRA_DTC_FLAGS_RAW}'
--bindings-dirs ${DTS_ROOT_BINDINGS}
--header-out ${DEVICETREE_UNFIXED_H}.new
--device-header-out ${DEVICE_EXTERN_H}.new
--dts-out ${ZEPHYR_DTS}.new # for debugging and dtc
--edt-pickle-out ${EDT_PICKLE}
${EXTRA_GEN_DEFINES_ARGS}
)
execute_process(
COMMAND ${CMD_EXTRACT}
WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
RESULT_VARIABLE ret
)
if(NOT "${ret}" STREQUAL "0")
message(STATUS "In: ${PROJECT_BINARY_DIR}, command: ${CMD_EXTRACT}")
message(FATAL_ERROR "gen_defines.py failed with return code: ${ret}")
else()
zephyr_file_copy(${ZEPHYR_DTS}.new ${ZEPHYR_DTS} ONLY_IF_DIFFERENT)
zephyr_file_copy(${DEVICETREE_UNFIXED_H}.new ${DEVICETREE_UNFIXED_H} ONLY_IF_DIFFERENT)
zephyr_file_copy(${DEVICE_EXTERN_H}.new ${DEVICE_EXTERN_H})
file(REMOVE ${ZEPHYR_DTS}.new ${DEVICETREE_UNFIXED_H}.new ${DEVICE_EXTERN_H}.new)
message(STATUS "Generated zephyr.dts: ${ZEPHYR_DTS}")
message(STATUS "Generated devicetree_unfixed.h: ${DEVICETREE_UNFIXED_H}")
message(STATUS "Generated device_extern.h: ${DEVICE_EXTERN_H}")
endif()
execute_process(
COMMAND ${PYTHON_EXECUTABLE} ${DTS_CMAKE_SCRIPT}
--edt-pickle ${EDT_PICKLE}
--cmake-out ${DTS_CMAKE}
WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
RESULT_VARIABLE ret
)
if(NOT "${ret}" STREQUAL "0")
message(FATAL_ERROR "gen_dts_cmake.py failed with return code: ${ret}")
else()
message(STATUS "Including generated dts.cmake file: ${DTS_CMAKE}")
include(${DTS_CMAKE})
endif()
#
# Run dtc on the final devicetree source, just to catch any
# warnings/errors from it. dtlib and edtlib parse the devicetree files
# themselves, so we don't rely on dtc otherwise.
#
if(DTC)
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()
set(VALID_EXTRA_DTC_FLAGS "")
foreach(extra_opt ${EXTRA_DTC_FLAGS})
check_dtc_flag(${extra_opt} check)
if (check)
list(APPEND VALID_EXTRA_DTC_FLAGS ${extra_opt})
endif()
endforeach()
set(EXTRA_DTC_FLAGS ${VALID_EXTRA_DTC_FLAGS})
execute_process(
COMMAND ${DTC}
-O dts
-o - # Write output to stdout, which we discard below
-b 0
-E unit_address_vs_reg
${DTC_NO_WARN_UNIT_ADDR}
${DTC_WARN_UNIT_ADDR_IF_ENABLED}
${EXTRA_DTC_FLAGS} # User settable
${ZEPHYR_DTS}
OUTPUT_QUIET # Discard stdout
WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
RESULT_VARIABLE ret
)
if(NOT "${ret}" STREQUAL "0")
message(FATAL_ERROR "command failed with return code: ${ret}")
endif()
endif(DTC)
else()
set(header_template ${ZEPHYR_BASE}/misc/generated/generated_header.template)
zephyr_file_copy(${header_template} ${DEVICETREE_UNFIXED_H} ONLY_IF_DIFFERENT)
zephyr_file_copy(${header_template} ${DEVICE_EXTERN_H} ONLY_IF_DIFFERENT)
endif(SUPPORTS_DTS)