​​root=/dev/nfs rw​​: the root filesystem will be mounted using NFS, and it will be writable.

  • ​​nfsroot=192.168.1.1:/opt/eldk-4.2/ppc_4xx​​: the NFS server has the IP address 192.168.1.1, and exports the directory /opt/eldk-4.2/ppc_4xx for our system to use as root filesystem.
  • ​​ip=192.168.100.6:192.168.1.1:192.168.1.1:255.255.0.0:canyonlands:eth0:off​​: the target has the IP address ​​192.168.100.6​​; the NFS server is ​​192.168.1.1​​; there is a gateway at IP address ​​192.168.1.1​​; the netmask is ​​255.255.0.0​​ and our hostname is ​​canyonlands​​. The first ethernet interface (​​eth0​​) willbe used, and the Linux kernel will immediately use this network configuration and not try to re-negotiate it (IP autoconfiguration is ​​off​​).

 

Kernel command line: root=/dev/nfs rw nfsroot=192.168.1.1:/opt/eldk-4.2/ppc_4xxFP/ ip=192.168.100.6:192.168.1.1:192.168.1.254:255.255.0.0:canyonlands:eth0:off panic=1 console=ttyS0,115200
http://fxr.watson.org/fxr/source/Documentation/nfsroot.txt?v=linux-2.6