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Enable Arm Cortex-M33 Support #126

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38bcb40
ports: cortex_m33: Add CMakeLists.txt
microbuilder Mar 11, 2021
c5474e6
Skip VFP access for Cortex-M33 without FP
theotherjimmy Mar 12, 2021
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2 changes: 1 addition & 1 deletion cmake/arm-none-eabi.cmake
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Expand Up @@ -17,7 +17,7 @@ set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)

set(CMAKE_C_FLAGS "${MCPU_FLAGS} ${VFP_FLAGS} ${SPEC_FLAGS} -fdata-sections -ffunction-sections -mlong-calls" CACHE INTERNAL "c compiler flags")
set(CMAKE_CXX_FLAGS "${MCPU_FLAGS} ${VFP_FLAGS} -fdata-sections -ffunction-sections -fno-rtti -fno-exceptions -mlong-calls" CACHE INTERNAL "cxx compiler flags")
set(CMAKE_ASM_FLAGS "${MCPU_FLAGS} -x assembler-with-cpp" CACHE INTERNAL "asm compiler flags")
set(CMAKE_ASM_FLAGS "${MCPU_FLAGS} ${VFP_FLAGS} -x assembler-with-cpp" CACHE INTERNAL "asm compiler flags")
set(CMAKE_EXE_LINKER_FLAGS "${MCPU_FLAGS} ${LD_FLAGS} -Wl,--gc-sections" CACHE INTERNAL "exe link flags")

SET(CMAKE_C_FLAGS_DEBUG "-Og -g -ggdb3" CACHE INTERNAL "c debug compiler flags")
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14 changes: 14 additions & 0 deletions cmake/cortex_m33.cmake
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@@ -0,0 +1,14 @@

# Name of the target
set(CMAKE_SYSTEM_NAME Generic)
set(CMAKE_SYSTEM_PROCESSOR cortex-m33)

set(THREADX_ARCH "cortex_m33")
set(THREADX_TOOLCHAIN "gnu")

set(MCPU_FLAGS "-mthumb -mcpu=cortex-m33+nodsp+nofp")
set(VFP_FLAGS "-mfloat-abi=softfp")
set(SPEC_FLAGS "--specs=nosys.specs")
# set(LD_FLAGS "-nostartfiles")

include(${CMAKE_CURRENT_LIST_DIR}/arm-none-eabi.cmake)
26 changes: 26 additions & 0 deletions ports/cortex_m33/gnu/CMakeLists.txt
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@@ -0,0 +1,26 @@

target_sources(${PROJECT_NAME} PRIVATE
# {{BEGIN_TARGET_SOURCES}}
${CMAKE_CURRENT_LIST_DIR}/src/txe_thread_secure_stack_allocate.c
${CMAKE_CURRENT_LIST_DIR}/src/txe_thread_secure_stack_free.c
${CMAKE_CURRENT_LIST_DIR}/src/tx_initialize_low_level.S
${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_context_restore.S
${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_context_save.S
${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_interrupt_control.S
${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_interrupt_disable.S
${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_interrupt_restore.S
${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_schedule.S
${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_secure_stack.c
${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_secure_stack_allocate.S
${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_secure_stack_free.S
${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_stack_build.S
${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_stack_error_handler.c
${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_stack_error_notify.c
${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_system_return.S
${CMAKE_CURRENT_LIST_DIR}/src/tx_timer_interrupt.S
# {{END_TARGET_SOURCES}}
)

target_include_directories(${PROJECT_NAME} PUBLIC
${CMAKE_CURRENT_LIST_DIR}/inc
)
2 changes: 2 additions & 0 deletions ports/cortex_m33/gnu/src/tx_thread_schedule.S
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Expand Up @@ -345,6 +345,8 @@ _tx_svc_secure_init:
.thumb_func
.type _tx_vfp_access, function
_tx_vfp_access:
#if TX_ENABLE_FPU_SUPPORT
VMOV.F32 s0, s0 // Simply access the VFP
#endif
BX lr // Return to caller
.end