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Date: Sat, 24 Oct 1998 18:12:32 -0400 (EDT)
From: Thomas Valentino Crimi <tcrimi+@andrew.cmu.edu>
To: mjacob@feral.com
Subject: Re: PCI mapping error
Cc: freebsd-alpha@FreeBSD.ORG
In-Reply-To: <Pine.LNX.4.02.9810241438490.14714-100000@feral-gw>
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Excerpts from mail: 24-Oct-98 Re: PCI mapping error  by Matthew
Jacob@feral.com 
> 
>Which platform this is would be helpful.

   I've been working on an AlphaStation 200 4/233.  On the PCI bus are
also ncr and de drivers, which are working just fine.

  To answer one of Mike Smith's questions, va and pa are both set to
0x88000000, I also double checked the mem-map register on the card at
one point.  I'm going to be grabbing a PC with PCI support later on
tonight and see what pops up.

  Oh, another note.  Before I tried out the read/write functions, I
tried using direct memory access, this paniced the kernel:
manual retype:

fatal kernel trap:

 trap entry = 0x2 (memory management fault)
 a0         = 88400000
 a1         = 0x1
 a2         = 0x1
...

  If this is a more telling than read/write, I'll do a full register
dump and whatever else may help (show map gives another fault, unaligned
access)

On a note, this card worked under AlphaLinux-XWindows before I got to
thinking it should do more than just be an X display. 

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