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 8 M0_CROSS_COMPILE ?= arm-none-eabi- 9 10 # Build architecture 11 ARCH := cortex-m0 12 13 # Build platform 14 PLAT_M0 ?= rk3399m0 15 16 ifeq (${V},0) 17 Q=@ 18 else 19 Q= 20 endif 21 export Q 22 23 .SUFFIXES: 24 25 INCLUDES += -Iinclude/ \ 26 -I../../include/shared/ 27 28 # NOTE: Add C source files here 29 C_SOURCES := src/startup.c \ 30 src/main.c \ 31 src/suspend.c \ 32 src/dram.c \ 33 src/stopwatch.c 34 35 # Flags definition 36 COMMON_FLAGS := -g -mcpu=$(ARCH) -mthumb -Wall -O3 -nostdlib -mfloat-abi=soft 37 CFLAGS := -ffunction-sections -fdata-sections -fomit-frame-pointer -fno-common 38 ASFLAGS := -Wa,--gdwarf-2 39 LDFLAGS := -Wl,--gc-sections -Wl,--build-id=none 40 41 # Cross tool 42 CC := ${M0_CROSS_COMPILE}gcc 43 CPP := ${M0_CROSS_COMPILE}cpp 44 AR := ${M0_CROSS_COMPILE}ar 45 OC := ${M0_CROSS_COMPILE}objcopy 46 OD := ${M0_CROSS_COMPILE}objdump 47 NM := ${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. 52 define SOURCES_TO_OBJS 53 $(notdir $(patsubst %.c,%.o,$(filter %.c,$(1)))) \ 54 $(notdir $(patsubst %.S,%.o,$(filter %.S,$(1)))) 55 endef 56 57 SOURCES := $(C_SOURCES) 58 OBJS := $(addprefix $(BUILD)/,$(call SOURCES_TO_OBJS,$(SOURCES))) 59 LINKERFILE := $(BUILD)/$(PLAT_M0).ld 60 MAPFILE := $(BUILD)/$(PLAT_M0).map 61 ELF := $(BUILD)/$(PLAT_M0).elf 62 BIN := $(BUILD)/$(PLAT_M0).bin 63 LINKERFILE_SRC := src/$(PLAT_M0).ld.S 64 65 # Function definition related compilation 66 define 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 $$@ 73 endef 74 75 define MAKE_S 76 $(eval OBJ := $(1)/$(patsubst %.S,%.o,$(notdir $(2)))) 77 78 $(OBJ) : $(2) 79 @echo " AS $$<" 80 $$(Q)$$(CC) -x assembler-with-cpp $$(COMMON_FLAGS) $$(ASFLAGS) -c $$< -o $$@ 81 endef 82 83 define 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))) 93 endef 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
