On 06/24/11 08:38, Nilay Vaish wrote: > On Sun, 26 Jun 2011, Gabe Black wrote: > >> It's been a while, but this is what I remember augmented by some >> Googling. It's xAPIC which is the second version of the APIC >> architecture. The first version was just called APIC, and the third and >> current version is called x2APIC. There was a fairly detailed section of >> the Intel manuals about it which is what I based my implementation on. >> AMD added some information about it in their manuals a while ago, and >> back then it wasn't quite as complete. That may be different now. >> >> Gabe >> >> On 06/23/11 21:26, Nilay Vaish wrote: >>> May I know where can I find the documentation for APIC, using which >>> the gem5 version has been implemented? >>> >>> Thanks >>> Nilay > > Thanks Gabe. > > In x86/interrupts.cc, several variables are serialized one after > another. Is there some documentation on what these variables are? > > Thanks > Nilay > _______________________________________________ > gem5-users mailing list > [email protected] > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
Hey, sorry for the delay getting back to you. No, there is no documentation for it right now, although you could probably understand most of it by looking at the manual and the source. Roughly, and with no guarantee of accuracy, this is what I think they're for. regs -> array of architecturally visible register values clock -> current "time"? "time" for the timer to go off? clock period? pending*, *Vector -> if an interrupt of a particular type is waiting, and what its vector is startedUp -> whether or not the APIC is in the special mode where it will respond to a startup IPI, which (if I remember correctly) are only valid after an init IPI pendingUnmaskableInt -> Whether one of the super interrupts (my term) are waiting pendingIPIs -> whether any IPIs are pending, I think? IRRV-> the IRR (interrupt request register) ISRV -> the ISR (in service register) timer event stuff Gabe _______________________________________________ gem5-users mailing list [email protected] http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
