| # Copyright 2022 Google LLC |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| CROSS_COMPILE ?= aarch64-linux-gnu- |
| |
| CC = $(CROSS_COMPILE)gcc |
| OBJCOPY = $(CROSS_COMPILE)objcopy |
| |
| CFLAGS = -Os -g -mcpu=cortex-a35 |
| ASFLAGS = $(CFLAGS) -Wa,-mcpu=cortex-a35 |
| LDSCRIPT = bootrom.ld |
| LDFLAGS = -Wl,--build-id=none -static -nostdlib -T $(LDSCRIPT) |
| |
| OBJS := start.o image.o |
| |
| .PHONY: all clean |
| all: npcm8xx_bootrom.bin |
| |
| clean: |
| rm -f *.o *.bin *.elf |
| |
| npcm8xx_bootrom.bin: npcm8xx_bootrom.elf |
| $(OBJCOPY) -O binary $< $@ |
| |
| npcm8xx_bootrom.elf: $(OBJS) $(LDSCRIPT) |
| $(CC) -o $@ $(LDFLAGS) $(OBJS) |
