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Message-Id: <19970730204234.26898@mi.uni-koeln.de>
Date: Wed, 30 Jul 1997 20:42:34 +0200
From: Stefan Esser <se@FreeBSD.ORG>
To: Amancio Hasty <hasty@rah.star-gate.com>
Cc: Luigi Rizzo <luigi@labinfo.iet.unipi.it>, hackers@FreeBSD.ORG,
        multimedia@FreeBSD.ORG
Subject: Re: Advice sought on PnP configuration
References: <199707300404.GAA03229@labinfo.iet.unipi.it> <199707300701.AAA00475@rah.star-gate.com>
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> PCI devices should be probed and attached last for they are they
> are the most flexible to configure 

NO !!!

PCI devices get their addresses assigned by the PCI BIOS
before giving control to the primary boot loader. They can 
not easily be moved around, since there may be constraints
that are only known to the BIOS!

>                                    and can share interrupts.

Yes, that much is true. But they can't share interrupts 
with non-PnP devices, and the BIOS has arranged all things
before the FreeBSD device probe gets a chance ...


PCI devices are probed first, because they are assumed to
have got assigned unique and non-conflicting addresses.


Regards, STefan