On Tue, Mar 04, 2003 at 10:54:21AM -0800, Linus Torvalds wrote:
> Well, I'd say it looks like the MP table _claims_ that only pin0 is
> connected. Remember: the claim was that this machine worked on WinXP.
It seems that "IRQ redirection table" is gathered directly from
IO_APIC hardware (I may be wrong though), and it conforms to other
data...
> So there are at least two potential reasons for that:
>
> - The MP table is simply wrong, and WinXP gets the routing information
> from somewhere else (ie most likely ACPI)
>
> - The MP table is right, and only pin0 is connected, and WinXP only uses
> pin0 (ie it puts the card in some state where all irqs are shared
> across all of the four tulip chips).
>
> Maybe somebody can come up with other schenarios.
- XP is able to reprogramm the IO_APIC so that all four pins are
routed properly.
Sounds a bit heretical, I know. :-)
Ivan.
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This archive was generated by hypermail 2b29 : Fri Mar 07 2003 - 22:00:25 EST