From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <2dfffab7dece66a82b57cb204fc49e68@quanstro.net>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] Unable to find South Bridge
From: erik quanstrom <quanstro@quanstro.net>
Date: Fri, 29 Feb 2008 07:38:37 -0500
In-Reply-To: <20080229024423.GA4542@acm.jhu.edu>
MIME-Version: 1.0
Content-Type: text/plain; charset="US-ASCII"
Content-Transfer-Encoding: 7bit
Topicbox-Message-UUID: 6886ce84-ead3-11e9-9d60-3106f5b1d025

> During boot, I get:
>
> pcirouting: South Bridge FFFF, FFFF not found
>
> and later:
>
> pcirouting: Cannot find south bridge PCI.255.31.7
>
> Do any of you know what might be going on? Any suggestions as to how I might
> get Plan 9 going on this hardware?
>

i don't think the problem is your south bridge.  very few
of them need to be recognized, so they aren't.  the problem
is likely that you need the vid/did of the ide controller in
your motherboard added to the ata driver.  if you have
a system on which you can compile a kernel, try applying
this diff

; diffy -c /sys/src/9/pc/sdata.c
/n/dump/2008/0229/sys/src/9/pc/sdata.c:1960,1965 - /sys/src/9/pc/sdata.c:1960,1968
  			r = pcicfgr8(p, 0x46);
  			pcicfgw8(p, 0x46, (r & 0x0C)|0xF0);
  			/*FALLTHROUGH*/
+ 		case (0x7401<<16)|0x1022:	/* AMD 755 Cobra */
+ 		case (0x7409<<16)|0x1022:	/* AMD 756 Viper */
+ 		case (0x7410<<16)|0x1022:	/* AMD 766 Viper Plus */
  		case (0x7469<<16)|0x1022:	/* AMD 3111 */
  			/*
  			 * This can probably be lumped in with the 768 above.

if you don't contact me offline and we'll figure something out.

- erik