Re: [linux-audio-user] [OT] P4P800 interrupt routing (was: APIC)

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Subject: Re: [linux-audio-user] [OT] P4P800 interrupt routing (was: APIC)
From: Clemens Ladisch (clemens_AT_ladisch.de)
Date: Tue Jan 20 2004 - 11:35:20 EET

Robert Epprecht wrote:

> Clemens Ladisch <clemens_AT_ladisch.de> writes:
>
> > (Please note that the table in the P4P800's manual is partly wrong.)
>
> I'd like to know more about that,

The interrupts of the PCI slots are shown correctly, but some of the
onboard devices aren't. (Which is strange because the onboard device
interrupts have a fixed routing inside the southbridge, and are well
documented by Intel.)

The onboard devices have these assignments:
$ cat /proc/interrupts
           CPU0 CPU1
 ...
 16: 13 0 IO-APIC-level usb-uhci, usb-uhci
 17: 16 0 IO-APIC-level Intel ICH5
 18: 32 0 IO-APIC-level usb-uhci
 19: 18 0 IO-APIC-level usb-uhci
 ...
 22: 136945 0 IO-APIC-level SysKonnect SK-98xx
 23: 0 0 IO-APIC-level ehci_hcd

(where 16 = PIRQA, ..., 23 = PIRQH)

HTH
Clemens

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