Subversion Repositories darkriscv

# 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. 

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
        $(AS) $(ASFLAGS) -c $< -o $@

%.s: %.c
        $(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.