Device description
设备:rk3566
emmc:8GB/32GB Sandisk emmc
Host: Ubuntu22.04(24.04's qemu has problem when creating ubuntu base rootfs, so skip it)
参考: 【每周学习摘要06(23/10/27-23/11/10)】
制作过程
编译组件
DDR+SPL loader
U-boot
Kernel
Image, ko and dtb files,TBD
制作boot.img
boot.img包含kernel以及设备树等,以及uboot保存的env(saveenv)
预留63M空间足以(未压缩的Image最大50MiB), 如果要更大,请修改parameter.txt以防止烧录时干涉rootfs分区
touch boot.img
dd if=/dev/zero of=boot.img bs=1M count=63
sync
mkfs.fat boot.img
sync
sudo mount boot.img /mnt
sudo cp -a -r boot/* /mnt
sync
sudo umount /mnt制作Ubuntu 2204 rootfs
下载Ubuntu base 2204
地址:https://cdimage.ubuntu.com/ubuntu-base/releases/jammy/release/
wget https://cdimage.ubuntu.com/ubuntu-base/releases/jammy/release/ubuntu-base-22.04.5-base-arm64.tar.gzmkdir rootfs && tar --same-owner -xf ubuntu-base-22.04.5-base-arm64.tar.gz -C rootfsNote you shall
添加dns解析
echo nameserver 114.114.114.114 > rootfs/etc/resolv.conf以及apt源(vim rootfs/etc/apt/source.list)
deb [trusted=yes] http://mirrors.aliyun.com/ubuntu-ports/ jammy main restricted
deb [trusted=yes] http://mirrors.aliyun.com/ubuntu-ports/ jammy-updates main restricted
deb [trusted=yes] http://mirrors.aliyun.com/ubuntu-ports/ jammy universe
deb [trusted=yes] http://mirrors.aliyun.com/ubuntu-ports/ jammy-updates universe
deb [trusted=yes] http://mirrors.aliyun.com/ubuntu-ports/ jammy multiverse
deb [trusted=yes] http://mirrors.aliyun.com/ubuntu-ports/ jammy-updates multiverse
deb [trusted=yes] http://mirrors.aliyun.com/ubuntu-ports/ jammy-backports main restricted universe multiverse
deb [trusted=yes] http://mirrors.aliyun.com/ubuntu-ports/ jammy-security main restricted
deb [trusted=yes] http://mirrors.aliyun.com/ubuntu-ports/ jammy-security universe
deb [trusted=yes] http://mirrors.aliyun.com/ubuntu-ports/ jammy-security multiverse进入环境后更新apt 源并且下载必要包
sudo chroot rootfs
apt update
apt upgrade
apt install vim sudo kmod net-tools ethtool ifupdown language-pack-en-base rsyslog htop iputils-ping udev systemd network-manager -ychange passwd for root
passwd rootcreate user meta
adduser metaadd meta to sudoers
chmod +w /etc/sudoers
vim /etc/sudoers
on line 44
# User privilege specification
root ALL=(ALL:ALL) ALL
meta ALL=(ALL:ALL) ALLFinally pack it
return to the father of rootfs directory.
Create a rootfs.img buffer with 1G size
shrink its size by e2fsck and resize2fs
touch rootfs.img
dd if=/dev/zero of=rootfs.img bs=1M count=900
sync
mkfs.ext4 rootfs.img
sudo mount rootfs.img /mnt
sudo cp -a -r rootfs/* /mnt
sync
sudo umount /mnt
e2fsck -f -p rootfs.img
resize2fs -M rootfs.imgYou can adjust count in the second command by check fs usage by mounting it to /mnt and then check df -h. To achieve a smaller image size, better make the Available space to be less than 50M.
example:
➜ my-emmc-image df -h
Filesystem Size Used Avail Use% Mounted on
tmpfs 6.3G 2.2M 6.3G 1% /run
/dev/nvme1n1p3 60G 31G 27G 54% /
tmpfs 32G 148M 32G 1% /dev/shm
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
efivarfs 268K 144K 120K 55% /sys/firmware/efi/efivars
/dev/nvme0n1p1 256M 49M 208M 19% /boot/efi
tmpfs 6.3G 64K 6.3G 1% /run/user/1000
/dev/nvme0n1p5 480G 405G 51G 89% /media/ztn/4ca5df7c-065c-4b2b-b868-bab13a2816b0
/dev/loop10 868M 783M 24M 98% /mnt
拷贝网卡驱动
TBD, both kernel and user space
拷贝Mali GPU 显卡驱动
TBD, only mali so libs
zju weblogin script
if you want to accesss net after connecting to ZJUWLAN but lacks of a webbrowser to authenticate, you can use
https://github.com/Mythologyli/zju-web-login
First install python3
apt install python3then follow https://pip.pypa.io/en/stable/installation/ to install pip
By using host's system's wget, we can get rid of downloading wget and its dependency.
su meta
cd ~
wget https://bootstrap.pypa.io/get-pip.py
python3 get-pip.pyIn order to shrink the rootfs size, don't install git but rather clone by downloading.
Again, by using host's system's wget, to avoid downloading wget and its dependency. Then unzip it.
wget https://github.com/Mythologyli/zju-web-login/archive/refs/heads/master.zip
unzip master.zip
cd master
pip3 install -r requirements.txt