TFTP + NFS boot openrd-ultimate

TFTP + NFS boot openrd-ultimate

1, install Debian in USB as described in http://www.cyrius.com/debian/kirkwood/openrd/install.html

2, after success installation, login to Debian system

3, edit /etc/initramfs-tools/initramfs.conf, find "BOOT=local", change it to "BOOT=nfs";

4, issue "update-initramfs -u" to get new /boot/uImage and /boot/uInitrd.

5, shutdown the system, copy the base system to /opt/openrd/nfs, which is exported via NFS.
5.1, Edit /opt/openrd/nfs/etc/fstab to comment out all local mount since there is no local file system after NFS boot. Otherwise, debian would try to mount root file system again after NFS boot

6, copy /opt/openrd/nfs/boot/{uImage,uInitrd} to /opt/openrd/tftp/{uImage,uInitrd}

7, start Openrd-Ultimate, enter u-boot, set environments
set mainlineLinux yes
set arcNumber 2884
set ipaddr=192.168.1.2
set serverip=192.168.1.1
set console 'console=ttyS0,115200n8'
set nfs 'mtdparts=orion_nand:0x400000@0x100000(uImage),0x1fb00000@0x500000(rootfs) rw root=/dev/nfs rw nfsroot=192.168.1.1:/opt/openrd/nfs'
set ip 'ip=192.168.1.2:192.168.1.1:192.168.1.1:255.255.255.0:DB88FXX81:eth0:none'
set bootargs $(console) $(nfs) $(ip)
set bootcmd 'tftpboot 0x01100000 uInitrd; tftpboot 0x00800000 uImage; bootm 0x00800000 0x01100000'
saveenv
reset

8, After restart, should be able use tftp to load uImage and uInitrd, and mount NFS directory /opt/openrd/nfs as root filesystem