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#----------------------------------------------------------------------------
# Copyright (c) 2021 - 2022 Arm Limited. All rights reserved.
# SPDX-License-Identifier: Apache-2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#----------------------------------------------------------------------------
# specify the cross compiler
set(TRIPLET arm-none-eabi)
set(CMAKE_C_COMPILER ${TRIPLET}-gcc)
set(CMAKE_CXX_COMPILER ${TRIPLET}-g++)
set(CMAKE_CROSSCOMPILING true)
set(CMAKE_SYSTEM_NAME Generic)
set(MIN_GCC_VERSION 10.2.1)
# Skip compiler test execution
set(CMAKE_C_COMPILER_WORKS 1)
set(CMAKE_CXX_COMPILER_WORKS 1)
if (NOT DEFINED CMAKE_SYSTEM_PROCESSOR AND NOT DEFINED CMAKE_SYSTEM_ARCH)
set(CMAKE_SYSTEM_PROCESSOR cortex-m55)
endif()
if (CMAKE_SYSTEM_PROCESSOR STREQUAL cortex-m55)
# Flags for cortex-m55
set(CPU_ID M55)
set(CPU_COMPILE_DEF CPU_CORTEX_${CPU_ID})
set(ARM_CPU "ARMC${CPU_ID}")
set(FLOAT_ABI hard)
set(ARM_MATH_DSP 1)
set(ARM_MATH_LOOPUNROLL 1)
set(CPU_HEADER_FILE "${ARM_CPU}.h")
set(CPU_COMPILE_OPTION "-mcpu=${CMAKE_SYSTEM_PROCESSOR}")
set(CPU_LINK_OPT "--cpu=Cortex-${CPU_ID}")
elseif (CMAKE_SYSTEM_PROCESSOR STREQUAL cortex-m85 OR CMAKE_SYSTEM_ARCH STREQUAL armv8.1-m.main)
# Flags for Cortex-M85
set(CPU_ID ARMv81MML_DSP_DP_MVE_FP)
set(ARM_CPU "ARMv81MML")
set(CPU_COMPILE_DEF ${CPU_ID})
set(FLOAT_ABI hard)
set(ARM_MATH_DSP 1)
set(ARM_MATH_LOOPUNROLL 1)
# @TODO: Revise once we have the CPU file in CMSIS and CPU flags
# are supported by toolchains.
set(CPU_HEADER_FILE "${CPU_ID}.h")
set(CPU_COMPILE_OPTION "-march=armv8.1-m.main+mve.fp+fp.dp")
set(CPU_LINK_OPT "--cpu=8.1-M.Main.mve.fp")
elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL cortex-m33)
# Flags for cortex-m33 to go here
endif()
set(${CPU_COMPILE_DEF} 1)
# Warning options
add_compile_options(
-Wall
-Wextra
-Wvla
-Wno-psabi)
# General purpose compile options:
add_compile_options(
-funsigned-char
-fno-function-sections
-fdata-sections
"$<$<COMPILE_LANGUAGE:CXX>:-fno-unwind-tables;-fno-rtti;-fno-exceptions>")
# Arch compile options:
add_compile_options(
-mthumb
-mfloat-abi=${FLOAT_ABI}
-mlittle-endian
-MD
${CPU_COMPILE_OPTION})
# Compile definitions:
add_compile_definitions(
CPU_HEADER_FILE=\"${CPU_HEADER_FILE}\"
$<$<BOOL:${CPU_COMPILE_DEF}>:${CPU_COMPILE_DEF}>
$<$<BOOL:${ARM_MATH_DSP}>:ARM_MATH_DSP>
$<$<BOOL:${ARM_MATH_LOOPUNROLL}>:ARM_MATH_LOOPUNROLL>)
# Link options:
add_link_options(
-mthumb
${CPU_COMPILE_OPTION}
-mfloat-abi=${FLOAT_ABI}
-mlittle-endian
--stats
"SHELL:-Xlinker --gc-sections"
"$<$<CONFIG:RELEASE>:--no-debug>")
function(configure_semihosting TARGET_NAME SEMIHOSTING)
if (${SEMIHOSTING})
target_link_options(${TARGET_NAME} PUBLIC "--specs=rdimon.specs")
target_compile_options(${TARGET_NAME} PUBLIC "--specs=rdimon.specs")
target_compile_definitions(${TARGET_NAME} PUBLIC USE_SEMIHOSTING)
else()
target_link_options(${TARGET_NAME} PUBLIC --specs=nosys.specs)
target_compile_options(${TARGET_NAME} PUBLIC "--specs=nosys.specs")
endif()
endfunction()
# Function to add a map file output for the linker to dump diagnostic information to.
function(add_target_map_file TARGET_NAME MAP_FILE_PATH)
target_link_options(${TARGET_NAME} PUBLIC
"SHELL:-Xlinker -Map=${MAP_FILE_PATH}")
endfunction()
# Function to add linker option to use the chosen linker script.
function(add_linker_script TARGET_NAME SCRIPT_DIR SCRIPT_NAME)
set(LINKER_SCRIPT_PATH ${SCRIPT_DIR}/${SCRIPT_NAME}.ld
CACHE STRING "Linker script path")
if (NOT EXISTS ${LINKER_SCRIPT_PATH})
message(FATAL_ERROR "Linker script not found: ${LINKER_SCRIPT_PATH}")
endif()
message(STATUS "Using linker script: ${LINKER_SCRIPT_PATH}")
target_link_options(${TARGET_NAME} PUBLIC
"SHELL:-T ${LINKER_SCRIPT_PATH}")
endfunction()
# Function to set the command to copy/extract contents from an elf
# into a binary file.
function(add_bin_generation_command)
set(multiValueArgs SECTION_PATTERNS OUTPUT_BIN_NAMES)
set(oneValueArgs TARGET_NAME OUTPUT_DIR AXF_PATH)
cmake_parse_arguments(PARSED "" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
list(LENGTH PARSED_SECTION_PATTERNS N_SECTION_PATTERNS)
list(LENGTH PARSED_OUTPUT_BIN_NAMES N_OUTPUT_BIN_NAMES)
if (NOT ${N_SECTION_PATTERNS} STREQUAL ${N_OUTPUT_BIN_NAMES})
message(FATAL_ERROR "Section patterns and the output binary names "
"should be of the same length")
endif()
message(STATUS "${TRIPLET}-objcopy requested to generate "
"${N_OUTPUT_BIN_NAMES} bin files.")
math(EXPR MAX_IDX "${N_SECTION_PATTERNS} - 1")
foreach(IDX RANGE ${MAX_IDX})
list(GET PARSED_OUTPUT_BIN_NAMES ${IDX} OUTPUT_BIN_NAME)
list(GET PARSED_SECTION_PATTERNS ${IDX} SECTION_PATTERN)
add_custom_command(TARGET ${PARSED_TARGET_NAME}
POST_BUILD
COMMAND ${TRIPLET}-objcopy -O binary
--only-section ${SECTION_PATTERN} ${PARSED_AXF_PATH}
${PARSED_OUTPUT_DIR}/${OUTPUT_BIN_NAME})
endforeach()
endfunction()
# Function to assert the compiler version
function(enforce_compiler_version)
if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS ${MIN_GCC_VERSION})
message( FATAL_ERROR "arm-none-eabi-gcc version must be ${MIN_GCC_VERSION} or greater." )
endif()
endfunction()
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