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cmake: CMake devicetree related linker functions implemented

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This commit introduces zephyr_linker_dts CMake functions for creation of
linker scripts based on devicetree nodes.

The linker devicetree functions supports the following features:
- Configuration of memory sections based on devicetree nodes

Overview of functions introduced with this commit:
- zephyr_linker_dts_memory

Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
This commit is contained in:
Torsten Rasmussen 2021-08-11 17:00:02 +02:00 • committed by Anas Nashif
commit 90e7078fa8
1 changed files with 71 additions and 0 deletions
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71
cmake/extensions.cmake
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@ -2979,6 +2979,77 @@ macro(zephyr_linker_memory_ifdef feature_toggle)
endif()
endmacro()
# Usage:
# zephyr_linker_dts_memory(NAME <name> PATH <path> FLAGS <flags>)
# zephyr_linker_dts_memory(NAME <name> NODELABEL <nodelabel> FLAGS <flags>)
# zephyr_linker_dts_memory(NAME <name> CHOSEN <prop> FLAGS <flags>)
#
# Zephyr linker devicetree memory.
# This function specifies a memory region for the platform in use based on its
# devicetree configuration.
#
# The memory will only be defined if the devicetree node or a devicetree node
# matching the nodelabel exists and has status okay.
#
# Only one of PATH, NODELABEL, and CHOSEN parameters may be given.
#
# NAME <name> : Name of the memory region, for example FLASH.
# PATH <path> : Devicetree node identifier.
# NODELABEL <label>: Node label
# CHOSEN <prop> : Chosen property, add memory section described by the
# /chosen property if it exists.
# FLAGS <flags> : Flags describing properties of the memory region.
# Currently supported:
# r: Read-only region
# w: Read-write region
# x: Executable region
# The flags r and x, or w and x may be combined like: rx, wx.
#
function(zephyr_linker_dts_memory)
set(single_args "CHOSEN;FLAGS;NAME;PATH;NODELABEL")
cmake_parse_arguments(DTS_MEMORY "" "${single_args}" "" ${ARGN})
if(DTS_MEMORY_UNPARSED_ARGUMENTS)
message(FATAL_ERROR "zephyr_linker_dts_memory(${ARGV0} ...) given unknown "
"arguments: ${DTS_MEMORY_UNPARSED_ARGUMENTS}"
)
endif()
if((DEFINED DTS_MEMORY_PATH AND (DEFINED DTS_MEMORY_NODELABEL OR DEFINED DTS_MEMORY_CHOSEN))
OR (DEFINED DTS_MEMORY_NODELABEL AND DEFINED DTS_MEMORY_CHOSEN))
message(FATAL_ERROR "zephyr_linker_dts_memory(${ARGV0} ...), only one of "
"PATH, NODELABEL, and CHOSEN is allowed."
)
endif()
if(DEFINED DTS_MEMORY_NODELABEL)
dt_nodelabel(DTS_MEMORY_PATH NODELABEL ${DTS_MEMORY_NODELABEL})
endif()
if(DEFINED DTS_MEMORY_CHOSEN)
dt_chosen(DTS_MEMORY_PATH PROPERTY ${DTS_MEMORY_CHOSEN})
endif()
if(NOT DEFINED DTS_MEMORY_PATH)
return()
endif()
dt_node_exists(exists PATH ${DTS_MEMORY_PATH})
if(NOT ${exists})
return()
endif()
dt_reg_addr(addr PATH ${DTS_MEMORY_PATH})
dt_reg_size(size PATH ${DTS_MEMORY_PATH})
zephyr_linker_memory(
NAME ${DTS_MEMORY_NAME}
START ${addr}
SIZE ${size}
FLAGS ${DTS_MEMORY_FLAGS}
)
endfunction()
# Usage:
# zephyr_linker_group(NAME <name> [VMA <region|group>] [LMA <region|group>])
# zephyr_linker_group(NAME <name> GROUP <group>)