1# 2# Copyright (c) 2016, ARM Limited and Contributors. All rights reserved. 3# 4# Redistribution and use in source and binary forms, with or without 5# modification, are permitted provided that the following conditions are met: 6# 7# Redistributions of source code must retain the above copyright notice, this 8# list of conditions and the following disclaimer. 9# 10# Redistributions in binary form must reproduce the above copyright notice, 11# this list of conditions and the following disclaimer in the documentation 12# and/or other materials provided with the distribution. 13# 14# Neither the name of ARM nor the names of its contributors may be used 15# to endorse or promote products derived from this software without specific 16# prior written permission. 17# 18# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28# POSSIBILITY OF SUCH DAMAGE. 29# 30 31# Cross Compile 32M0_CROSS_COMPILE ?= arm-none-eabi- 33 34# Build architecture 35ARCH := cortex-m0 36 37# Build platform 38PLAT_M0 ?= rk3399m0 39 40ifeq (${V},0) 41 Q=@ 42else 43 Q= 44endif 45export Q 46 47.SUFFIXES: 48 49INCLUDES += -Iinclude/ 50 51# NOTE: Add C source files here 52C_SOURCES := src/startup.c \ 53 src/main.c 54 55# Flags definition 56CFLAGS := -g 57ASFLAGS := -g -Wa,--gdwarf-2 58 59ASFLAGS += -mcpu=$(ARCH) -mthumb -Wall -ffunction-sections -O3 60CFLAGS += -mcpu=$(ARCH) -mthumb -Wall -ffunction-sections -O3 61 62LDFLAGS := -mcpu=$(ARCH) -mthumb -g -nostartfiles -nostdlib -O3 63LDFLAGS += -Wl,--gc-sections -Wl,--build-id=none 64 65# Cross tool 66CC := ${M0_CROSS_COMPILE}gcc 67CPP := ${M0_CROSS_COMPILE}cpp 68AS := ${M0_CROSS_COMPILE}gcc 69AR := ${M0_CROSS_COMPILE}ar 70LD := ${M0_CROSS_COMPILE}ld 71OC := ${M0_CROSS_COMPILE}objcopy 72OD := ${M0_CROSS_COMPILE}objdump 73NM := ${M0_CROSS_COMPILE}nm 74PP := ${M0_CROSS_COMPILE}gcc -E ${CFLAGS} 75 76# NOTE: The line continuation '\' is required in the next define otherwise we 77# end up with a line-feed characer at the end of the last c filename. 78# Also bare this issue in mind if extending the list of supported filetypes. 79define SOURCES_TO_OBJS 80 $(notdir $(patsubst %.c,%.o,$(filter %.c,$(1)))) \ 81 $(notdir $(patsubst %.S,%.o,$(filter %.S,$(1)))) 82endef 83 84SOURCES := $(C_SOURCES) 85OBJS := $(addprefix $(BUILD)/,$(call SOURCES_TO_OBJS,$(SOURCES))) 86LINKERFILE := src/rk3399m0.ld 87MAPFILE := $(BUILD)/$(PLAT_M0).map 88ELF := $(BUILD)/$(PLAT_M0).elf 89BIN := $(BUILD)/$(PLAT_M0).bin 90 91# Function definition related compilation 92define MAKE_C 93$(eval OBJ := $(1)/$(patsubst %.c,%.o,$(notdir $(2)))) 94-include $(patsubst %.o,%.d,$(OBJ)) 95 96$(OBJ) : $(2) 97 @echo " CC $$<" 98 $$(Q)$$(CC) $$(CFLAGS) $$(INCLUDES) -MMD -MT $$@ -c $$< -o $$@ 99endef 100 101define MAKE_S 102$(eval OBJ := $(1)/$(patsubst %.S,%.o,$(notdir $(2)))) 103 104$(OBJ) : $(2) 105 @echo " AS $$<" 106 $$(Q)$$(AS) $$(ASFLAGS) -c $$< -o $$@ 107endef 108 109define MAKE_OBJS 110 $(eval C_OBJS := $(filter %.c,$(2))) 111 $(eval REMAIN := $(filter-out %.c,$(2))) 112 $(eval $(foreach obj,$(C_OBJS),$(call MAKE_C,$(1),$(obj),$(3)))) 113 114 $(eval S_OBJS := $(filter %.S,$(REMAIN))) 115 $(eval REMAIN := $(filter-out %.S,$(REMAIN))) 116 $(eval $(foreach obj,$(S_OBJS),$(call MAKE_S,$(1),$(obj),$(3)))) 117 118 $(and $(REMAIN),$(error Unexpected source files present: $(REMAIN))) 119endef 120 121.PHONY: all 122all: $(BIN) 123 124$(ELF) : $(OBJS) $(LINKERFILE) 125 @echo " LD $@" 126 $(Q)$(CC) -o $@ $(LDFLAGS) -Wl,-Map=$(MAPFILE) -Wl,-T$(LINKERFILE) \ 127 $(OBJS) 128 129$(BIN) : $(ELF) 130 @echo " BIN $@" 131 $(Q)$(OC) -O binary $< $@ 132 133$(eval $(call MAKE_OBJS,$(BUILD),$(SOURCES),$(1))) 134