U-Boot on Xilinx ML403

Dear all,
Now I am trying to use u-boot to boot my Linux kernel image(2.6.16) using 
tftp and then mount the file system using NFS in ML403 board. I am new to 
u-boot. So can anyone suggest me some documents or reference designs about 
u-boot on ML403? I know there is a reference from Xilinx called "getting 
started with u-boot on the ml300". But I cannot configure the board as 
ml403. Are there any patches needed? Any document about this topic is 
appreciated. Thanks a lot for your help.

Regards
Ming

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