pci in arch/powerpc vs arch/ppc

Hi all,
in the old arch/ppc tree, there was a function called pq2ads_setup_pci()  
that set up PCI regs for 8272xx, in m82xx_pci.c. I was wandering, where  
are these registers configured now in arch/powerpc? I can't seem to find  
these code now.

Also, I can see that now bus 0, dev 0 (which I think represents the host  
bridge, right?) is now excluded using pq2_pci_exclude_device, but it  
wasn't in older code. Why is that?

thank you in advance...