How to configure 2 bank flash with different chip

Hi all,
I have a custom board, based on XScale IXP425 processor. There are
2 different flash bank:
- Bank #1: SGS THOMSON 29F040
- Bank #2:
Intel JS28F128P30B

I successful porting U-Boot 1.1.6 on my board, but I have configured only
Bank #1 Flash.

Which are the fundamental steps
in order to add the second flash bank?
Regards,
Antonello