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pata
2006 Sep 26
1
HVM PIC/APIC confusion in ACPI firmware?
...argument into the PICD variable:
Name(PICD, 0)
Method(_PIC, 1) {
Store(Arg0, PICD)
}
So PICD will contain 0 for PIC mode, and 1 for APIC mode. The _PRT
method then returns a PCI routing table appropriate for the current
interrupt mode:
Method(_PRT, 0) {
If (PICD) { Return(PRTA) }
Return (PRTP)
}
But PRTA is a simple routing table, dealing only with PCI INTA,
while PRTP is a more complex one dealing with PCI INTs A-D.
It looks to me like the _PRT method is backwards, and should be
returning PRTA when PICD is zero, and PRTP otherwise. Right?
Dave
P.S. I mad...