[coreboot] [patch] [AMD Fam10] Fix confused RB-C2 and DA-C2

Bao, Zheng Zheng.Bao at amd.com
Fri Jul 17 04:01:35 CEST 2009

RB-C2 probably uses socket type AM3, which is not supported in Coreboot
currently. I wonder if your board can go through the whole image.

You can contact tim.perley at amd.com about the patch releasing.


-----Original Message-----
From: Ward Vandewege [mailto:ward at gnu.org] 
Sent: Thursday, July 16, 2009 10:37 PM
To: Bao, Zheng
Cc: Coreboot
Subject: Re: [coreboot] [patch] [AMD Fam10] Fix confused RB-C2 and DA-C2

Hi Zheng,

On Thu, Jul 16, 2009 at 03:40:49PM +0800, Bao, Zheng wrote:
> This patch is about the DA-C2 and RB-C2. Chip with install processor
> Revision ID of 0x100F62 is DA-C2, instead of RB-C2 which was
> defined in raminit_amdmct.c. RB-C2's ID is 0x100F42. The Erratas
> to them are almost the same.

Aha. That would perhaps explain why my box with 

  Quad-Core AMD Opteron(tm) Processor 2372 HE

with revision id 0x100f42 really does not like ucode revision 92 (it
itself constantly).

> Issues:
> 1. I really dont know what their nicknames are (Shanghai C2 or
> something).

Don't know about that.

> 2. About the mc_patch_01000086.h, I dont know if it is allowed to be
> released.
>    If you really need it, please contact AMD Inc to see if it is

Well, I have my box booting without any ucode update. It would be nice
have mc_patch_01000086.h public if that's the revision for my cpus. Who
do I

> 3. I haven't made coreboot go thoroughly on this RB-C2. This patch is
> just half tested.

I now have a working tree for Supermicro h8dmr with RB-C2 but it needs a
more tweaking and cleaning up. I hope to get that ready soon so I can
the patch to the list.

>    I am not confident it is 100% correct.

I'll test tonight or tomorrow and let you know how it goes.


Ward Vandewege <ward at gnu.org>

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