On Wed, Jul 30, 2008 at 08:56:18AM -0500, Stephen Horton wrote: > Thanks for your kind encouragement. I now have a mostly booting kernel. > I have just a few remaining issues to resolve; perhaps you (or others) > can give me some tips regarding these: > > 1. In your prpmc2800 .dts configuration, in the PCI bus configuration > section, you lay-out the IRQ mappings like this: > interrupt-map = < > /* IDSEL 0x0a */ > 5000 0 0 1 &/mv64x60/pic 50 > 5000 0 0 2 &/mv64x60/pic 51 > I've read the Open Firmware document on Interrupt Mapping, but I still > don't really understand the first 3 columns (5000 0 0), especially where > the first column comes from. Is this just some arbitrarily selected > offset address for that device on the pci bus?
An address on the PCI bus is represented by 3 cells (96 bits). Take a look at page 4 of http://www.openbios.org/data/docs/bus.pci.pdf You'll see that the PCI device is contained in bits 15-11, selected by the 0xf800 in interrupt-map-mask. The 0x5000 corresponds to device 0xa. -Dale _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
