lkml.org 
[lkml]   [1999]   [Oct]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: 2.3.20 will not boot (PCI problem)
Date
From
>    Unfortunately, we use the interrupt routing table not only for fixing bad
> IRQ's, but also for detecting peer host bridges. We could disable this BIOS
> call by default, make it an option and hope that all new multi-bus machines
> will provide the $PIR table and handle the rest by chipset-specific kludge.

You have to handle the PIIX4 by kludge. The $PIR table is set up on the
basis you are windows and will do this. The BIOS call for getting the table
is known to fail on a whole pile of BIOSen too. Enough that MS don't use
it by default.

On a PC the PIIX4 is provided with a PIIX2 table. Windows loads up a driver
of its own to handle this when it sees the PIIX2 routing table on a PIIX4.

It's also worth noting that Microsoft consider it sufficiently unreliable that
they don't attempt to use any IRQ steering features unless they have to.


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:54    [from the cache]
©2003-2011 Jasper Spaans