how are the interrupts mapped on the taiga board?

[Leisner, Martin]

I'm looking at mpc7448hpc2.dts -- and the tsi108 specs...

I see how TTYS0 is IRQ12 and the ethernet is IRQ16...that agrees with
the file...
and the tundra TSi108 spec.

But in after we boot in /proc/interrupts:

 16:       1796  Tsi108_PIC Edge      serial
 18:      24148  Tsi108_PIC Level     eth0

I don't see in the .dts a mapping from 12->16 and 16->18.
Nore have I found anything in the source...

I using 2.6.21.1.

How is this done?

marty