>On Friday, March 16, 2007 10:20 am Bjorn Helgaas wrote: >> Are there really ia64 machines where we need to use the option ROM >> copy at 0xC0000? If so, is this documented somewhere? I couldn't >> find any mention in DIG64, EFI, or internal HP architecture specs. >> >> If we do need to use it, ia64 has a bit of a problem because on some >> boxes, the 0xC0000 memory supports only cacheable access, the VGA >> frame buffer at 0xA0000 supports only uncacheable access, and the >> usual ia64 ioremap mapping is a 16MB page that covers both. > >Apparently Eichiro's machine needs it, and of course there are i386 and >x86_64 machines that need it to, so it makes sense that it be generic. > >Jesse > Yes, our machine need it. >> Are there really ia64 machines where we need to use the option ROM >> copy at 0xC0000? If so, is this documented somewhere? I couldn't >> find any mention in DIG64, EFI, or internal HP architecture specs. "System Abstraction Layer Specification" describes it in section 2.6. Eiichiro - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
|