Debian/Ubuntu on the Zynq based board

Minimal debian filesystem for armhf and armel (arm hard floating point and arm soft floating point)

Guide to create a minimal minimal Debian filesystem

Jeasine Ma 2016

References:

Addapted to Zynq based MicroZedBoard from: http://www.acmesystems.it/multistrap

More information about what is armhf and armel: https://wiki.debian.org/ArmHardFloatPort

Default features:

• ssh
• gcc
• wget
• rsync
• python

Requirements:

~$ sudo apt-get install multistrap
~$ sudo apt-get install qemu
~$ sudo apt-get install qemu-user-static
~$ sudo apt-get install binfmt-support
~$ sudo apt-get install dpkg-cross

Create a working directory directory:

~$ mkdir multistrap
~$ cd multistrap
~/multistrap$

Create the root filesystem

When your multistrap.conf file is ready launch type:

if you are using the default linaro:

~/multistrap$ sudo multistrap -a armhf -f microzed.confg

At the end of this procedure the directory target-rootfs directory will contents the whole rootfs tree to be moved into the second partition of an Acme board bootable microSD.

if you are using a compiler without floating point support as the default of the xilinx SDK:

~/multistrap$ sudo multistrap -a armel -f microzed.conf

Configure now the Debian packages using the armel CPU emulator QEMU and chroot to create a jail where dpkg will see the target-rootfs as its root (/) directory.

~/multistrap$ sudo cp /usr/bin/qemu-arm-static target-rootfs/usr/bin
~/multistrap$ sudo mount -o bind /dev/ target-rootfs/dev/
~/multistrap$ sudo LC_ALL=C LANGUAGE=C LANG=C chroot target-rootfs dpkg --configure -a

At the Dash configuration promots answer no.

Do some extra configurations with this script: ~/multistrap$ chmod +x microzed.sh ~/multistrap$ sudo ./microzed.sh

Create now the target root login password:

~/multistrap$ sudo chroot target-rootfs passwd
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully

List the packages installed

~/multistrap$ sudo chroot target-rootfs dpkg --get-selections | more

Ugrade the system and install new packages

~/multistrap$ sudo chroot target-rootfs dpkg --get-selections

At this point you can upgrade Debian to the latest version by typing:

~/multistrap$ sudo LC_ALL=C LANGUAGE=C LANG=C chroot target-rootfs apt-get update
~/multistrap$ sudo LC_ALL=C LANGUAGE=C LANG=C chroot target-rootfs apt-get upgrade
~/multistrap$ sudo LC_ALL=C LANGUAGE=C LANG=C chroot target-rootfs apt-get clean

Copy the rootfs contents on microSD

Remove qemu from the target rootfs contents:

~/multistrap$ sudo rm target-rootfs/usr/bin/qemu-arm-static

then format a new microSD. You can use fdisk, gparted.

Check https://github.com/dasGringuen/MicroZedKernel for a kernel and uboot

Mount the microSD on yourLinux PC and copy all the target-rootfs contents in the second microSD partition. Use the lsblk command to be check where it is mounted

~/multistrap$ sudo rsync -axHAX --progress target-rootfs/ <path of your rootfs>

Test

After booting with the sd in the microzedboard

You should be able to connect through ssh with the next command:

~/multistrap$ ssh root@192.168.1.103

If you are using the image with the avahi deamon you can connect like this:

~/multistrap$ ssh root@microzed.local

Check the size of each package:

~/root@arm# dpkg-query -W --showformat='${Installed-Size;10}\t${Package}\n' | sort -k1,1n

Check file system size:

~/root@arm# df -h
~/root@arm# du -h --max-depth=1