[U-Boot-Users] basic uboot questions

[Muneet]

Hello Friends, 

I am entirely new to uboot. 
I had read the uboot manual and have a small grasp over it. 
I am working on MPC8323E-RDB board. 

I have following questions for you:- 

1. Can we use uboot only for booting Linux? 
2. Is the kernel necessary for the board or standalone application alone can
serve the purpose? 
3. How big can be the size of standalone applications? 
4. The uboot is already installed by manufacturer on my board, can i take
the backup of that   from board? 
5. For porting uboot to a board what cross compilation tools are required?
If ELDK can serve this purpose? 

Plz do reply 

Thanks, 
Muneet Garg
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