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#
# Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
#
# Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# Neither the name of ARM nor the names of its contributors may be used
# to endorse or promote products derived from this software without specific
# prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# Cross Compile
M0_CROSS_COMPILE ?= arm-none-eabi-
# Build architecture
ARCH := cortex-m0
# Build platform
PLAT_M0 ?= rk3399m0
ifeq (${V},0)
Q=@
else
Q=
endif
export Q
.SUFFIXES:
INCLUDES += -Iinclude/ \
-I../../include/shared/
# NOTE: Add C source files here
C_SOURCES := src/startup.c \
src/main.c \
src/suspend.c \
src/dram.c \
src/stopwatch.c
# Flags definition
CFLAGS := -g
ASFLAGS := -g -Wa,--gdwarf-2
ASFLAGS += -mcpu=$(ARCH) -mthumb -Wall -ffunction-sections -O3
CFLAGS += -mcpu=$(ARCH) -mthumb -Wall -ffunction-sections -O3
LDFLAGS := -mcpu=$(ARCH) -mthumb -g -nostartfiles -nostdlib -O3
LDFLAGS += -Wl,--gc-sections -Wl,--build-id=none
# Cross tool
CC := ${M0_CROSS_COMPILE}gcc
CPP := ${M0_CROSS_COMPILE}cpp
AS := ${M0_CROSS_COMPILE}gcc
AR := ${M0_CROSS_COMPILE}ar
LD := ${M0_CROSS_COMPILE}ld
OC := ${M0_CROSS_COMPILE}objcopy
OD := ${M0_CROSS_COMPILE}objdump
NM := ${M0_CROSS_COMPILE}nm
PP := ${M0_CROSS_COMPILE}gcc -E ${CFLAGS}
# NOTE: The line continuation '\' is required in the next define otherwise we
# end up with a line-feed characer at the end of the last c filename.
# Also bare this issue in mind if extending the list of supported filetypes.
define SOURCES_TO_OBJS
$(notdir $(patsubst %.c,%.o,$(filter %.c,$(1)))) \
$(notdir $(patsubst %.S,%.o,$(filter %.S,$(1))))
endef
SOURCES := $(C_SOURCES)
OBJS := $(addprefix $(BUILD)/,$(call SOURCES_TO_OBJS,$(SOURCES)))
LINKERFILE := $(BUILD)/$(PLAT_M0).ld
MAPFILE := $(BUILD)/$(PLAT_M0).map
ELF := $(BUILD)/$(PLAT_M0).elf
BIN := $(BUILD)/$(PLAT_M0).bin
LINKERFILE_SRC := src/$(PLAT_M0).ld.S
# Function definition related compilation
define MAKE_C
$(eval OBJ := $(1)/$(patsubst %.c,%.o,$(notdir $(2))))
-include $(patsubst %.o,%.d,$(OBJ))
$(OBJ) : $(2)
@echo " CC $$<"
$$(Q)$$(CC) $$(CFLAGS) $$(INCLUDES) -MMD -MT $$@ -c $$< -o $$@
endef
define MAKE_S
$(eval OBJ := $(1)/$(patsubst %.S,%.o,$(notdir $(2))))
$(OBJ) : $(2)
@echo " AS $$<"
$$(Q)$$(AS) $$(ASFLAGS) -c $$< -o $$@
endef
define MAKE_OBJS
$(eval C_OBJS := $(filter %.c,$(2)))
$(eval REMAIN := $(filter-out %.c,$(2)))
$(eval $(foreach obj,$(C_OBJS),$(call MAKE_C,$(1),$(obj),$(3))))
$(eval S_OBJS := $(filter %.S,$(REMAIN)))
$(eval REMAIN := $(filter-out %.S,$(REMAIN)))
$(eval $(foreach obj,$(S_OBJS),$(call MAKE_S,$(1),$(obj),$(3))))
$(and $(REMAIN),$(error Unexpected source files present: $(REMAIN)))
endef
.DEFAULT_GOAL := $(BIN)
$(LINKERFILE): $(LINKERFILE_SRC)
$(CC) $(CFLAGS) $(INCLUDES) -P -E -D__LINKER__ -MMD -MF $@.d -MT $@ -o $@ $<
-include $(LINKERFILE).d
$(ELF) : $(OBJS) $(LINKERFILE)
@echo " LD $@"
$(Q)$(CC) -o $@ $(LDFLAGS) -Wl,-Map=$(MAPFILE) -Wl,-T$(LINKERFILE) \
$(OBJS)
$(BIN) : $(ELF)
@echo " BIN $@"
$(Q)$(OC) -O binary $< $@
$(eval $(call MAKE_OBJS,$(BUILD),$(SOURCES),$(1)))