NFS-TFTP Booting

 

TFTP setting

• Install tftp

• sudo apt-get install tftp

• Create the directory

• mkdir /var/lib/tftpboot

• Edit/Create the file vim /etc/xinetd.d/tftp

service tftp{

protocol = udp

port = 69

socket_type = dgram

wait = yes

user = nobody

server = /usr/sbin/in.tftpd

server_args = /var/lib/tftpboot -s

disable = no

      }

• Restart the service

• sudo service xinetd restart

• copy the required kernal Image to be booted in the tftpboot directory

• sudo cp zImage /var/lib/tftpboot

NFS Setting

• Install the Nfs package

• sudo apt-get install nfs-kernel-server nfs-common portmap

• Include the directory which is to be nfs mounted at the end of configuration file /etc/exports 

• /home/arun/develop/rootfs *(rw,sync,no_subtree_check,no_root_squash)

• And then restart the service

• sudo service nfs-kernel-server restart

UBOOT Setting

• Set the IP address for the Host and target board

• setenv ipaddr 192.168.1.11

• setenv serverip 192.168.1.76

• To check whether the connection is established with the host

• ping 192.168.1.76

• Set the bootargument in the uboot to boot from the nfs

• setenv ip_full 192.168.1.11:192.168.1.76:192.168.1.1:255.255.255.0:arun:eth0:off

• It corresponds to 

• ip=host-ip:server-ip:gw-ip:netmask:hostname:device:auto-configure

• Next step is telling the kernel IP address of NFS server and what to mount for root file system

• setenv rootpath 192.168.1.76:/home/arun/develop/rootfs

• The final bootargs becomes

• setenv bootargs console=ttyO0,115200n8 root=/dev/nfs rw nfsroot=${rootpath} ip=${ip_full}

• Load the Kernel from the tftp server

• tftp 80200000 zImage

• where

• 80200000 → RAM Address to which image to be loaded

• zImage → File name which will be loaded

• Boot the image

• bootz 80200000

• Boot commands

• bootm for uImage Kernel

• bootz for zImage kernel