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Makefile
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# Copyright (c) 2018, Marcelo Samsoniuk
# 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 the copyright holder 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.
SHELL := /bin/bash
ifndef HOST_CC
HOST_CC = gcc
HOST_CFLAGS = -Wall -Wno-incompatible-library-redeclaration -I./include -Os
endif
ifndef CROSS
ARCH = rv32e
#ARCH = rv32i
#TODO: better way to switch little/big-endian:
#ENDIAN = _le # gcc for little-endian
#ENDIAN = _be # gcc for big-endian
CROSS = riscv32-embedded$(ENDIAN)-elf
#CROSS = riscv-elf
#CROSS = riscv32-unknown-elf
#CROSS = riscv32-embedded-elf
CCPATH = /usr/local/share/gcc-$(CROSS)/bin/
#CCPATH = /usr/local/share/toolchain-$(CROSS)/bin
#HARVARD = 1
endif
ifndef BUILD
BUILD = $(shell date -R)
endif
CC = $(CCPATH)/$(CROSS)-gcc
AS = $(CCPATH)/$(CROSS)-as
LD = $(CCPATH)/$(CROSS)-ld
OC = $(CCPATH)/$(CROSS)-objcopy
OD = $(CCPATH)/$(CROSS)-objdump
CPP = $(CCPATH)/$(CROSS)-cpp
CCFLAGS = -Wall -fcommon -ffreestanding -I./include -O2 -march=$(ARCH) -mabi=ilp32e -D__RISCV__ -DBUILD="\"$(BUILD)\"" -DARCH="\"$(ARCH)\""
ASFLAGS = -march=$(ARCH)
LDFLAGS = -T$(PROJ).ld -Map=$(PROJ).map -m elf32lriscv # -Ttext=0
CPFLAGS = -P
CCFLAGS += -mcmodel=medany -mexplicit-relocs # relocable clode
ifdef HARVARD
CPFLAGS += -DHARVARD=1
endif
OCFLAGS = -O binary # --reverse-bytes=4 # workaround for darkriscv big-endian blockrams
ODFLAGS = -d
PROJ = darksocv
OBJS = main.o stdio.o io.o banner.o boot.o
ASMS = main.s stdio.s io.s banner.s
SRCS = main.c stdio.c io.c banner.c boot.s
#include app/Makefile.in
DEPS = $(SRCS) $(ASMS) $(OBJS) $(PROJ).ld $(PROJ).ld.src
ifdef HARVARD
TARGETS = $(PROJ).rom.mem $(PROJ).ram.mem
else
TARGETS = $(PROJ).mem
endif
.PHONY: all
all: $(TARGETS) $(DEPS)
@echo sources ok.
clean:
-rm $(ASMS) $(OBJS) $(PROJ).{bin,lst,map,ram,rom,x86,text,data,bin,ld,o}
%.o: %.s Makefile
$(AS) $(ASFLAGS) -c $< -o $@
%.s: %.c Makefile
$(CC) $(CCFLAGS) -S $< -o $@
$(PROJ).ld: $(PROJ).ld.src
$(CPP) $(CPFLAGS) $(PROJ).ld.src $(PROJ).ld
$(PROJ).o: $(OBJS) $(PROJ).ld
$(LD) $(LDFLAGS) $(OBJS) -o $@
$(OD) $(ODFLAGS) $@ > $(PROJ).lst
$(PROJ).rom.mem: $(PROJ).o
$(OC) $(OCFLAGS) $< $(PROJ).text --only-section .text*
hexdump -ve '1/4 "%08x\n"' $(PROJ).text > $@
#xxd -p -c 4 -g 4 $< > $@
rm $(PROJ).text
wc -l $@
@echo rom ok.
$(PROJ).ram.mem: $(PROJ).o
$(OC) $(OCFLAGS) $< $(PROJ).data --only-section .*data*
hexdump -ve '1/4 "%08x\n"' $(PROJ).data > $@
#xxd -p -c 4 -g 4 $< > $@
rm $(PROJ).data
wc -l $@
@echo ram ok.
$(PROJ).mem: $(PROJ).o
$(OC) $(OCFLAGS) $< $(PROJ).bin
hexdump -ve '1/4 "%08x\n"' $(PROJ).bin > $@
#xxd -p -c 4 -g 4 $< > $@
rm $(PROJ).bin
wc -l $@
@echo mem ok.
$(PROJ).x86: $(SRCS)
$(HOST_CC) $(HOST_CFLAGS) $(SRCS) -o $(PROJ).x86 -DBUILD="\"$(BUILD)\"" -DARCH="\"x86\""
@echo x86 ok.