where is the kernel source for ppc embedded?(may sound stupid)

[Lei Sun]

Hi:
  I am taking another guys porting work, he downloaded 2.4.30 for ppc.
I was looking at http://www.denx.de/, and kernel.org, didn't feel like
it was from there, since the current source tree only  have arch/ppc
directory, no other arch specific tree.
  So where i should download 2.4.30 with all patch applied?


Thanks

ls