RE: [PATCH/2.6.17-rc4 1/10] Powerpc: Add general support for mpc7 448h pc2 (Taiga) platform

quoted

If I really need to use bat0 or bat1( I see that the 

general mmu use 

quoted

bat2 and bat3, where should I set up them?

For tsi108 pci configuration access, I need to map 16Mbyte physical 
address.  If I do not use an extra bat, I can not get the correct 
virtual address use ioremap.

What do you mean ? An ioremap will work, it will give you any 
virtual address, you just have to store that in a global 
instead of hard coding it. Hard coded virtual addresses are 
bad. Especially for things like PCI config space that really 
isn't performance sensitive.

Ben.