使用清华或中科大AOSP源镜像下载Android源码
access remote smb folder under Ubuntu
sudo apt install sshfs
sudo sshfs lingkong@10.12.xx.xx:/home/lingkong ~/remote_lingkong -o allow_other
https://blog.csdn.net/WEINILUO/article/details/50669164
install repo
解决同步源码Cannot get http://gerrit.googlesource.com/
同步cm12.1初始化出现的问题：
fatal: Cannot get https://gerrit.googlesource.com/git-repo/clone.bundle
fatal: error [Errno 101] Network is unreachable
repo安装问题解决方法,先单独克隆repo,然后将git-repo里面的repo文件复制到bin目录，在同步源码的工作目录新建.repo文件夹，把git-repo重命名为repo复制到.repo目录下：
git clone https://gerrit-googlesource.lug.ustc.edu.cn/git-repo重新初始化：
repo init -u git://github.com/CyanogenMod/android.git -b cm-12.1同步开始
repo sync -c -j8
build SiFive freedom-u-sdk
To build SiFive freedom-u-sdk, https://github.com/sifive/freedom-u-sdk, you can extract /work/SiFive-OE/SiFive-OE.tar.gz to home dir, and build u-boot by the following cmd:
1. from home dir,
tar -xf /work/SiFive-OE/SiFive-OE.tar.gz .
2. from ~/SiFive-OE/riscv-sifive
. ./meta-sifive/setup.sh
3. from ~/SiFive-OE/riscv-sifive/build
MACHINE=freedom-u540 bitbake u-boot
After all tasks are succeeded, u-boot image is generated in
~/SiFive-OE/riscv-sifive/build/tmp-glibc/deploy/images/freedom-u540/
To modify u-boot code, and then compile:
1. u-boot code is in ~/SiFive-OE/riscv-sifive/build/tmp-glibc/work/freedom_u540-oe-linux/u-boot/1_2019.07-r0/git, run the following cmd to recompile:
MACHINE=freedom-u540 bitbake u-boot -f -c compile
2. u-boot image will be generated --->> ~/SiFive-OE/riscv-sifive/build/tmp-glibc/work/freedom_u540-oe-linux/u-boot/1_2019.07-r0/build/boot.bin
3. the latest build log is in ~/SiFive-OE/riscv-sifive/build/tmp-glibc/work/freedom_u540-oe-linux/u-boot/1_2019.07-r0/temp/:
log.do_compile
4. generate ~/SiFive-OE/riscv-sifive/build/tmp-glibc/deploy/images/freedom-u540/ files, run :
MACHINE=freedom-u540 bitbake u-boot -f -c deploy
compile zsbl and fsbl
MACHINE=freedom-u540 bitbake freedom-u540-c000-bootloader
result will be saved to:
offline/SiFive-OE/riscv-sifive/build/tmp-glibc/work/riscv64-oe-linux/freedom-u540-c000-bootloader/gitAUTOINC+128f282d17-r0/git/
U new release available,
- u-boot 在上面跑起来
- zsbl和fsbl -> ok
- u-boot porting
u-boot 在lxS7和4xU7的工作方式
haps上没有rom和tfcard如何加载zsbl、fsbl和u-boot
