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 (${V},0) 41 Q=@ 42else 43 Q= 44endif 45export Q 46 47.SUFFIXES: 48 49INCLUDES += -Iinclude/ \ 50 -I../../include/shared/ 51 52# NOTE: Add C source files here 53C_SOURCES := src/startup.c \ 54 src/main.c \ 55 src/suspend.c \ 56 src/dram.c \ 57 src/stopwatch.c 58 59# Flags definition 60COMMON_FLAGS := -g -mcpu=$(ARCH) -mthumb -Wall -O3 -nostdlib -mfloat-abi=soft 61CFLAGS := -ffunction-sections -fdata-sections -fomit-frame-pointer -fno-common 62ASFLAGS := -Wa,--gdwarf-2 63LDFLAGS := -Wl,--gc-sections -Wl,--build-id=none 64 65# Cross tool 66CC := ${M0_CROSS_COMPILE}gcc 67CPP := ${M0_CROSS_COMPILE}cpp 68AR := ${M0_CROSS_COMPILE}ar 69OC := ${M0_CROSS_COMPILE}objcopy 70OD := ${M0_CROSS_COMPILE}objdump 71NM := ${M0_CROSS_COMPILE}nm 72 73# NOTE: The line continuation '\' is required in the next define otherwise we 74# end up with a line-feed characer at the end of the last c filename. 75# Also bare this issue in mind if extending the list of supported filetypes. 76define SOURCES_TO_OBJS 77 $(notdir $(patsubst %.c,%.o,$(filter %.c,$(1)))) \ 78 $(notdir $(patsubst %.S,%.o,$(filter %.S,$(1)))) 79endef 80 81SOURCES := $(C_SOURCES) 82OBJS := $(addprefix $(BUILD)/,$(call SOURCES_TO_OBJS,$(SOURCES))) 83LINKERFILE := $(BUILD)/$(PLAT_M0).ld 84MAPFILE := $(BUILD)/$(PLAT_M0).map 85ELF := $(BUILD)/$(PLAT_M0).elf 86BIN := $(BUILD)/$(PLAT_M0).bin 87LINKERFILE_SRC := src/$(PLAT_M0).ld.S 88 89# Function definition related compilation 90define MAKE_C 91$(eval OBJ := $(1)/$(patsubst %.c,%.o,$(notdir $(2)))) 92-include $(patsubst %.o,%.d,$(OBJ)) 93 94$(OBJ) : $(2) 95 @echo " CC $$<" 96 $$(Q)$$(CC) $$(COMMON_FLAGS) $$(CFLAGS) $$(INCLUDES) -MMD -MT $$@ -c $$< -o $$@ 97endef 98 99define MAKE_S 100$(eval OBJ := $(1)/$(patsubst %.S,%.o,$(notdir $(2)))) 101 102$(OBJ) : $(2) 103 @echo " AS $$<" 104 $$(Q)$$(CC) -x assembler-with-cpp $$(COMMON_FLAGS) $$(ASFLAGS) -c $$< -o $$@ 105endef 106 107define MAKE_OBJS 108 $(eval C_OBJS := $(filter %.c,$(2))) 109 $(eval REMAIN := $(filter-out %.c,$(2))) 110 $(eval $(foreach obj,$(C_OBJS),$(call MAKE_C,$(1),$(obj),$(3)))) 111 112 $(eval S_OBJS := $(filter %.S,$(REMAIN))) 113 $(eval REMAIN := $(filter-out %.S,$(REMAIN))) 114 $(eval $(foreach obj,$(S_OBJS),$(call MAKE_S,$(1),$(obj),$(3)))) 115 116 $(and $(REMAIN),$(error Unexpected source files present: $(REMAIN))) 117endef 118 119.DEFAULT_GOAL := $(BIN) 120 121$(LINKERFILE): $(LINKERFILE_SRC) 122 $(CC) $(COMMON_FLAGS) $(INCLUDES) -P -E -D__LINKER__ -MMD -MF $@.d -MT $@ -o $@ $< 123-include $(LINKERFILE).d 124 125$(ELF) : $(OBJS) $(LINKERFILE) 126 @echo " LD $@" 127 $(Q)$(CC) -o $@ $(COMMON_FLAGS) $(LDFLAGS) -Wl,-Map=$(MAPFILE) -Wl,-T$(LINKERFILE) $(OBJS) 128 129$(BIN) : $(ELF) 130 @echo " BIN $@" 131 $(Q)$(OC) -O binary $< $@ 132 133$(eval $(call MAKE_OBJS,$(BUILD),$(SOURCES),$(1))) 134