apt update
apt install lzop libusb-1.0-0-dev git flex bison build-essential gcc-arm-linux-gnueabihf lzop libncurses5-dev libssl-dev bc wget rsync
git clone git://git.pengutronix.de/git/barebox.git
cd barebox
export CROSS_COMPILE=arm-linux-gnueabihf-
export ARCH=arm
# see that your boards would be supported (radxa rock rk3188 in this case)
find . -type f | grep rock | grep radxa | grep defconf
make radxa_rock_defconfig
# further customizations
make menuconfig
nano arch/arm/boards/radxa-rock/env/boot/mshc1
make -j8
# your image in
ls images/images/barebox-radxa-rock.img
Barebox sd card
As documented here: https://www.barebox.org/doc/latest/boards/rockchip.html
-
Make 2 partitions on SD for boot and root filesystems.
- make a DOS partition table, each partition would be ext4 with labels "boot" and "linuxroot"
-
Checkout and compile https://github.com/apxii/rkboottools
git clone https://github.com/apxii/rkboottools.git && cd rkboottoolsmake
-
Get some RK3188 bootloader from https://github.com/neo-technologies/rockchip-bootloader
-
Run “rk-splitboot RK3188Loader(L)_V2.13.bin” command. (for example). You will get FlashData file with others. It’s a DRAM setup blob. Otherwise it can be borrowed from RK U-boot sources from https://github.com/linux-rockchip/u-boot-rockchip/blob/u-boot-rk3188/tools/rk_tools/3188_LPDDR2_300MHz_DDR3_300MHz_20130830.bin
rk-splitboot RK3188Loader(L)_V2.13.bin-> will give use FlashData and FlashBoot in the working directory
-
Run
rk-makebootable FlashData barebox-radxa-rock.bin rrboot.bin -
dd if=rrboot.bin of=</dev/sdcard> bs=$((0x200)) seek=$((0x40))
SD card is ready
export CROSS_COMPILE=arm-linux-gnueabihf-
export ARCH=arm
git clone git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
cd linux-stable
git checkout 5.8.7
# rk3188 strictly related
wget http://rockchip.fr/radxa/linux/rockchip_defconfig -O arch/arm/configs/rockchip_defconfig
make rockchip_defconfig
# compilation qith devide tree blob
make -j8 zImage dtbs
# Append the device tree blob to zImage (CONFIG_ARM_APPENDED_DTB option) until we can use device tree support on boot.
cat arch/arm/boot/zImage arch/arm/boot/dts/rk3188-radxarock.dtb > zImage-dtb
# kernel modules
make -j8 modules
export INSTALL_MOD_PATH=../BareBox_setup/rootfs
mkdir -p $INSTALL_MOD_PATH
make modules_install
Now you just have to copy zImage-dtb in the boot partition of the sd card. In the next section we'll create the partitions on sd card.
apt install binfmt-support debootstrap losetup
export TARGET_DIR=rootfs
sudo debootstrap --arch=armhf --foreign buster $TARGET_DIR
mount -o bind /dev /media/wert/linuxroot/dev/
sudo chroot $TARGET_DIR
export LANG=C
/debootstrap/debootstrap --second-stage
apt update
apt install locales dialog openssh-server ntpdate htop net-tools sudo resolvconf udev ifupdown libpam-systemd i2c-tools
dpkg-reconfigure locales
apt clean
# configure mount point
nano /etc/fstab
# otherwise it will run on read-only mode
# /dev/mmcblk0p2 / ext4 defaults,noatime 0 1
# add users
adduser rock
# change root passwd
passwd
# customize networking
...
# put some net informations
export HOSTNAME=radxa-board
echo $HOSTNAME > /etc/hostname
echo 127.0.0.1 localhost > /etc/hosts
echo 127.0.1.1 $HOSTNAME >> /etc/hosts
hostname $HOSTNAME
# finished
exit
Create an image where to store the brand new rootfs (700MB)
dd if=/dev/zero of=rootfs.img bs=700K count=1024
losetup /dev/loop15 rootfs.img
mkfs.ext4 /dev/loop15
# mount and copy rootfs
mkdir mnt
mount /dev/loop15 mnt
rsync -aHAX rootfs/* mnt/
# umount
sync
umount mnt
# do a fs check, a resize
gparted /dev/sdg
# write partition to sd card
dd if=rootfs.img of=/dev/sdg2 bs=4K conv=sync status=progress
mount /dev/sdg1 (boot partition) and copy the zImage
cp zImage-dtb /mnt/zImage