On Mar 23, 2006, at 10:40 AM, David Updegraff wrote: > Kumar Gala wrote: >> On Mar 22, 2006, at 2:59 PM, David Updegraff wrote: >> >> >>> Hi. >>> >>> If there were a noswizzle option to the kernel command line that >>> resulted in pci scan simply trusting that the bootrom/u-boot had >>> already >>> correctly assigned the PCI irqs.... every tom,dick,harry, and >>> yours-truly wouldn't have to make a new platform to define the >>> swizzle-o-the-day. Or have I already missed this argument? >> >> >> Sure, I do this now. Just don't build pci_auto into your pci support >> and don't explicitly rescan in your pci setup. The 83xx pci code >> under arch/powerpc should effective do this. >> >> - kumar > > Hmm; I must be missing something... cuz to me it looks like pci_32.c > will allways call pcibios_init, which will will scan the bus, which > will > swizzle irqs if the platform has non-null swizzle and map_irq function > pointers defined.. Perhaps a setting I've missed somewhere re. > 'pci_auto', which I thought was a 'ppc' thing, not a 'powerpc' > thing..??
Ahh, why do you have swizzle and map_irq functions? I guess I forgot that part. In my setup I have u-boot do all IRQ assignment (via PCI IRQ line register) as well as all BAR config. I just leave swizzle and map_irq null. - kumar
