Questions about IO-APIC
Chen Tian <[email protected]>
| Newsgroups | gmane.comp.micro-kernel.l4.devel |
|---|---|
| Message-ID | <CADsfiYgj2P2=X7yr1hTq+Tcz_rD16-FzO01axbG1=cXvxFtQEg@mail.gmail.com> |
Hello, I have some basic questions about IO-APIC. In the boot-up message, I can see this: IO-APIC[ 0]: pins 23 PIN[ 0m]: vector=20, del=0, dm=physical, dest=0 (high, edge) PIN[ 1m]: vector=21, del=0, dm=physical, dest=0 (high, edge) PIN[ 2m]: vector=22, del=0, dm=physical, dest=0 (high, edge) I understand this info is from IO-APIC redirection table. My question is what does vector means? Is that the interrupt number CPU is going to see when an interrupt request is sent from a pin? Or it's an irq number assigned to an IO-APIC pin? Thanks. Best, Chen _______________________________________________ l4-hackers mailing list [email protected] http://os.inf.tu-dresden.de/mailman/listinfo/l4-hackers