1# 2# Copyright (c) 2016, ARM Limited and Contributors. All rights reserved. 3# 4# SPDX-License-Identifier: BSD-3-Clause 5# 6 7# Cross Compile 8M0_CROSS_COMPILE ?= arm-none-eabi- 9 10# Build architecture 11ARCH := cortex-m0 12 13# Build platform 14PLAT_M0 ?= rk3399m0 15 16ifeq (${V},0) 17 Q=@ 18else 19 Q= 20endif 21export Q 22 23.SUFFIXES: 24 25INCLUDES += -Iinclude/ \ 26 -I../../include/shared/ 27 28# NOTE: Add C source files here 29C_SOURCES := src/startup.c \ 30 src/main.c \ 31 src/suspend.c \ 32 src/dram.c \ 33 src/stopwatch.c 34 35# Flags definition 36COMMON_FLAGS := -g -mcpu=$(ARCH) -mthumb -Wall -O3 -nostdlib -mfloat-abi=soft 37CFLAGS := -ffunction-sections -fdata-sections -fomit-frame-pointer -fno-common 38ASFLAGS := -Wa,--gdwarf-2 39LDFLAGS := -Wl,--gc-sections -Wl,--build-id=none 40 41# Cross tool 42CC := ${M0_CROSS_COMPILE}gcc 43CPP := ${M0_CROSS_COMPILE}cpp 44AR := ${M0_CROSS_COMPILE}ar 45OC := ${M0_CROSS_COMPILE}objcopy 46OD := ${M0_CROSS_COMPILE}objdump 47NM := ${M0_CROSS_COMPILE}nm 48 49# NOTE: The line continuation '\' is required in the next define otherwise we 50# end up with a line-feed characer at the end of the last c filename. 51# Also bare this issue in mind if extending the list of supported filetypes. 52define SOURCES_TO_OBJS 53 $(notdir $(patsubst %.c,%.o,$(filter %.c,$(1)))) \ 54 $(notdir $(patsubst %.S,%.o,$(filter %.S,$(1)))) 55endef 56 57SOURCES := $(C_SOURCES) 58OBJS := $(addprefix $(BUILD)/,$(call SOURCES_TO_OBJS,$(SOURCES))) 59LINKERFILE := $(BUILD)/$(PLAT_M0).ld 60MAPFILE := $(BUILD)/$(PLAT_M0).map 61ELF := $(BUILD)/$(PLAT_M0).elf 62BIN := $(BUILD)/$(PLAT_M0).bin 63LINKERFILE_SRC := src/$(PLAT_M0).ld.S 64 65# Function definition related compilation 66define MAKE_C 67$(eval OBJ := $(1)/$(patsubst %.c,%.o,$(notdir $(2)))) 68-include $(patsubst %.o,%.d,$(OBJ)) 69 70$(OBJ) : $(2) 71 @echo " CC $$<" 72 $$(Q)$$(CC) $$(COMMON_FLAGS) $$(CFLAGS) $$(INCLUDES) -MMD -MT $$@ -c $$< -o $$@ 73endef 74 75define MAKE_S 76$(eval OBJ := $(1)/$(patsubst %.S,%.o,$(notdir $(2)))) 77 78$(OBJ) : $(2) 79 @echo " AS $$<" 80 $$(Q)$$(CC) -x assembler-with-cpp $$(COMMON_FLAGS) $$(ASFLAGS) -c $$< -o $$@ 81endef 82 83define MAKE_OBJS 84 $(eval C_OBJS := $(filter %.c,$(2))) 85 $(eval REMAIN := $(filter-out %.c,$(2))) 86 $(eval $(foreach obj,$(C_OBJS),$(call MAKE_C,$(1),$(obj),$(3)))) 87 88 $(eval S_OBJS := $(filter %.S,$(REMAIN))) 89 $(eval REMAIN := $(filter-out %.S,$(REMAIN))) 90 $(eval $(foreach obj,$(S_OBJS),$(call MAKE_S,$(1),$(obj),$(3)))) 91 92 $(and $(REMAIN),$(error Unexpected source files present: $(REMAIN))) 93endef 94 95.DEFAULT_GOAL := $(BIN) 96 97$(LINKERFILE): $(LINKERFILE_SRC) 98 $(CC) $(COMMON_FLAGS) $(INCLUDES) -P -E -D__LINKER__ -MMD -MF $@.d -MT $@ -o $@ $< 99-include $(LINKERFILE).d 100 101$(ELF) : $(OBJS) $(LINKERFILE) 102 @echo " LD $@" 103 $(Q)$(CC) -o $@ $(COMMON_FLAGS) $(LDFLAGS) -Wl,-Map=$(MAPFILE) -Wl,-T$(LINKERFILE) $(OBJS) 104 105$(BIN) : $(ELF) 106 @echo " BIN $@" 107 $(Q)$(OC) -O binary $< $@ 108 109$(eval $(call MAKE_OBJS,$(BUILD),$(SOURCES),$(1))) 110