Revision as of 08:47, 11 April 2023

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DART-6UL - Yocto Setup TFTP/NFS

Running Yocto rootfs on Variscite board using TFTP & NFS

On the Host

Prepare the rootfs folder:

$ cd ~/var-fslc-yocto
$ sudo mkdir rootfs
$ cd rootfs
$ sudo tar xvf  ../build_x11/tmp/deploy/images/imx6ul-var-dart/fsl-image-gui-imx6ul-var-dart.tar.gz

Make sure the NFS server is installed:

$ sudo apt-get install nfs-kernel-server

Edit /etc/exports. E.g.

$ sudo gedit /etc/exports

...and add the following line to it (replace <uname> with the actual username):

/home/<uname>/var-fslc-yocto/rootfs    *(rw,sync,no_root_squash,no_all_squash,no_subtree_check)

Restart the NFS server:

$ sudo /etc/init.d/nfs-kernel-server restart

Make sure the TFTP server is installed:

$ sudo apt-get install xinetd tftpd tftp

Verify the following:

$ ls /usr/sbin/in.tftpd
$ sudo gedit /etc/xinetd.d/tftp
service tftp
{
	protocol = udp
	port = 69
	socket_type = dgram
	wait = yes
	user = nobody
	server = /usr/sbin/in.tftpd
	server_args = /tftpboot
	disable = no
}

and run:

$ sudo mkdir /tftpboot
$ sudo chmod -R 777 /tftpboot
$ sudo /etc/init.d/xinetd restart

$ cd ~/var-fslc-yocto/build_x11/
$ sudo cp tmp/deploy/images/imx6ul-var-dart/zImage /tftpboot
$ for f in tmp/deploy/images/imx6ul-var-dart/*.dtb; do if [[ -L $f ]] && [[ $f != *imx6ul-var-dart.dtb ]]; then sudo cp $f /tftpboot; fi done
$ sudo rename 's/zImage-//' /tftpboot/zImage-*.dtb

Make adjustments to the rootfs:

When using NetworkManager on the target, configure NetworkManager not to manage the interface used for the NFS boot by adding the following to /home/<uname>/var-fslc-yocto/rootfs/etc/NetworkManager/NetworkManager.conf:

[keyfile]
unmanaged-devices=interface-name:eth0

Enable DNS:

$ sudo ln -fs /proc/net/pnp /home/<uname>/var-fslc-yocto/rootfs/etc/resolv.conf

On the Target

Make sure you have a serial connection to the target.

Boot the board and hit any key to stop the autoboot and get to the U-Boot command line. Run the following in the U-Boot command line:

=> setenv serverip <HOST_IP_ADDRESS>  (replace <HOST_IP_ADDRESS> with the actual IP address of your host - run 'ifconfig' on the host to get it)
=> setenv nfsroot /home/<uname>/var-fslc-yocto/rootfs  (replace <uname> with the actual username)
=> setenv bootcmd run netboot
=> saveenv

You are all set. Connect the target board to the same network as the host using an Ethernet cable, power cycle it and it should boot over NFS.

@@ Line 104: / Line 104: @@
 == On the Target  ==
+{{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-AM62 |
+Update the U-Boot enviroment by adding the following lines to the uEnv.txt file on the SD card/eMMC boot partition:
+<pre>
+svrip=<HOST_IP_ADDRESS>  (replace <HOST_IP_ADDRESS> with the actual IP address of your host - run 'ifconfig' on the host to get it)
+ipaddr=<TARGET_IP_ADDRESS> (replace <TARGET_IP_ADDRESS> with the IP address for the target)
+image=Image
+rootpath=/home/ff/ssd-dev/var/rootfs
+fdtfile=k3-am625-var-som-symphony.dtb
+netargs=setenv bootargs console=${console} ${optargs} root=/dev/nfs nfsroot=${serverip}:${rootpath},nolock,v3 rw ip=${ipaddr}:::::eth0
+netboot=tftp ${loadaddr} ${image}; tftp ${fdtaddr} ${fdtfile}; run netargs; booti ${loadaddr} - ${fdtaddr}
+uenvcmd=setenv serverip ${svrip}; setenv ipaddr ${ipaddr}; run netboot
+</pre>
+|
 Make sure you have a serial connection to the target.
@@ Line 114: / Line 130: @@
   => setenv bootcmd run netboot
   => saveenv
+}}
 You are all set. Connect the target board to the same network as the host using an Ethernet cable, power cycle it and it should boot over NFS.

Yocto Setup TFTP/NFS: Difference between revisions

Revision as of 08:47, 11 April 2023

Contents

Running Yocto rootfs on Variscite board using TFTP & NFS

On the Host

On the Target