| # Copyright (c) 2021 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. |
| |
| # Generic Makefile target for ARM Cortex M builds. |
| # For more info see: tensorflow/lite/micro/cortex_m_generic/README.md |
| ifeq ($(TARGET),$(filter $(TARGET), cortex_m_ethos_eval)) |
| FLOAT := soft |
| GCC_TARGET_ARCH := $(TARGET_ARCH) |
| |
| ifeq ($(TARGET_ARCH), cortex-m0) |
| CORE=M0 |
| ARM_LDFLAGS := -Wl,--cpu=Cortex-M0 |
| |
| else ifeq ($(TARGET_ARCH), cortex-m3) |
| CORE=M3 |
| ARM_LDFLAGS := -Wl,--cpu=Cortex-M3 |
| |
| else ifeq ($(TARGET_ARCH), cortex-m33) |
| CORE=M33 |
| ARM_LDFLAGS := -Wl,--cpu=Cortex-M33 |
| TARGET_SPECIFIC_FLAGS += -D__DSP_PRESENT=1 -D__FPU_PRESENT=1 -D__VTOR_PRESENT=1 -D__FPU_USED=1 |
| FLOAT=hard |
| |
| else ifeq ($(TARGET_ARCH), cortex-m33+nodsp) |
| CORE=M33 |
| ARM_LDFLAGS := -Wl,--cpu=Cortex-M33.no_dsp.no_fp |
| |
| else ifeq ($(TARGET_ARCH), cortex-m4) |
| CORE=M4 |
| ARM_LDFLAGS := -Wl,--cpu=Cortex-M4.no_fp |
| GCC_TARGET_ARCH := cortex-m4+nofp |
| |
| else ifeq ($(TARGET_ARCH), cortex-m4+fp) |
| CORE=M4 |
| ARM_LDFLAGS := -Wl,--cpu=Cortex-M4 |
| TARGET_SPECIFIC_FLAGS += -D__FPU_PRESENT=1 |
| FLOAT=hard |
| GCC_TARGET_ARCH := cortex-m4 |
| |
| else ifeq ($(TARGET_ARCH), cortex-m55) |
| CORE=M55 |
| ARM_LDFLAGS := -Wl,--cpu=8.1-M.Main.mve.fp |
| TARGET_SPECIFIC_FLAGS += -D__DSP_PRESENT=1 -D__FPU_PRESENT=1 |
| FLOAT=hard |
| |
| else ifeq ($(TARGET_ARCH), cortex-m55+nodsp+nofp) |
| CORE=M55 |
| ARM_LDFLAGS := -Wl,--cpu=8.1-M.Main.mve.no_dsp.no_fp |
| |
| else ifeq ($(TARGET_ARCH), cortex-m55+nofp) |
| CORE=M55 |
| ARM_LDFLAGS := -Wl,--cpu=8.1-M.Main.mve.no_fp |
| TARGET_SPECIFIC_FLAGS += -D__DSP_PRESENT=1 |
| |
| else ifeq ($(TARGET_ARCH), cortex-m7) |
| CORE=M7 |
| ARM_LDFLAGS := -Wl,--cpu=Cortex-M7.no_fp |
| GCC_TARGET_ARCH := cortex-m7+nofp |
| |
| else ifeq ($(TARGET_ARCH), cortex-m7+fp) |
| CORE=M7 |
| ARM_LDFLAGS := -Wl,--cpu=Cortex-M7 |
| FLOAT=hard |
| GCC_TARGET_ARCH := cortex-m7 |
| |
| else |
| $(error "TARGET_ARCH=$(TARGET_ARCH) is not supported") |
| endif |
| |
| ifneq ($(filter cortex-m55%,$(TARGET_ARCH)),) |
| # soft-abi=soft disables MVE - use softfp instead for M55. |
| ifeq ($(FLOAT),soft) |
| FLOAT=softfp |
| endif |
| endif |
| |
| # Toolchain specfic flags |
| ifeq ($(TOOLCHAIN), armclang) |
| CXX_TOOL := armclang |
| CC_TOOL := armclang |
| AR_TOOL := armar |
| LD := armlink |
| |
| FLAGS_ARMC = \ |
| --target=arm-arm-none-eabi \ |
| -mcpu=$(TARGET_ARCH) |
| |
| # For debug, include specific dwarf format symbols |
| ifeq ($(BUILD_TYPE), debug) |
| ifneq ($(ARMCLANG_DEBUG_DWARF_LEVEL),) |
| FLAGS_ARMC += -gdwarf-$(ARMCLANG_DEBUG_DWARF_LEVEL) |
| endif |
| endif |
| |
| CXXFLAGS += $(FLAGS_ARMC) |
| CCFLAGS += $(FLAGS_ARMC) |
| LDFLAGS += $(ARM_LDFLAGS) |
| |
| # Arm Compiler will not link the Math library (see below), therefore we're filtering it out. |
| # See Fatal error: L6450U: Cannot find library m: |
| # "Arm Compiler is designed to run in a bare metal environment, |
| # and automatically includes implementations of these functions, |
| # and so no such flag is necessary." |
| # https://developer.arm.com/documentation/100891/0611/troubleshooting/general-troubleshooting-advice |
| MICROLITE_LIBS := $(filter-out -lm,$(MICROLITE_LIBS)) |
| |
| else ifeq ($(TOOLCHAIN), gcc) |
| TARGET_TOOLCHAIN_PREFIX := arm-none-eabi- |
| |
| FLAGS_GCC = -mcpu=$(GCC_TARGET_ARCH) -mfpu=auto |
| CXXFLAGS += $(FLAGS_GCC) |
| CCFLAGS += $(FLAGS_GCC) |
| |
| else |
| $(error "TOOLCHAIN=$(TOOLCHAIN) is not supported.") |
| endif |
| |
| |
| PLATFORM_FLAGS = \ |
| -DTF_LITE_MCU_DEBUG_LOG \ |
| -mthumb \ |
| -mfloat-abi=$(FLOAT) \ |
| -funsigned-char \ |
| -mlittle-endian \ |
| -Wno-type-limits \ |
| -Wno-unused-private-field \ |
| -fomit-frame-pointer \ |
| -MD \ |
| -DCPU_CORTEX_$(CORE)=1 \ |
| -DETHOSU_ARCH=${ETHOSU_ARCH} \ |
| $(TARGET_SPECIFIC_FLAGS) |
| |
| # Common + C/C++ flags |
| CXXFLAGS += $(PLATFORM_FLAGS) |
| CCFLAGS += $(PLATFORM_FLAGS) |
| |
| endif |