[U-Boot] reinitialize peripherals

[Fundu]

I have a PPC440GX based board.

Do I need to reinitialize Peripheral Bank Configuration Registers (EBC0_B0CR-EBC0_B7CR) from the kernel ?
I'm quite sure that we don't, but just want to make sure. Because the problem
that i'm seeing strongly suggest that something isn't initializing. 

Here's the problem i'm getting a kernel "kernel access of bad
 area" when i erase flash region, surprisingly i can easily erase it from u-boot. which makes me ask the earlier question.   

any insights welcome.

thanks !