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Date: Thu, 3 Feb 2011 17:36:00 +0100
From: Borislav Petkov <bp@amd64.org>
To: Markus Trippelsdorf <markus@trippelsdorf.de>
Cc: Borislav Petkov <bp@amd64.org>,
        "linux-edac@vger.kernel.org" <linux-edac@vger.kernel.org>,
        Doug Thompson <dougthompson@xmission.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [EDAC-AMD64] Display correct RAM sizes in ganged mode on F10
 CPUs
Message-ID: <20110203163600.GA26261@aftab>
References: <20110129211531.GA1874@gentoo.trippels.de>
 <20110201185114.GD8418@aftab>
 <20110201192752.GA1589@gentoo.trippels.de>
 <20110203151721.GD24755@aftab>
 <20110203155951.GA1594@gentoo.trippels.de>
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On Thu, Feb 03, 2011 at 10:59:52AM -0500, Markus Trippelsdorf wrote:
> Hm, that doesn't work:
> 
> EDAC amd64: F10h detected (node 0).
> EDAC MC: DCT0 chip selects:
> EDAC amd64: MC: 0:  1024MB 1:  1024MB
> EDAC amd64: MC: 2:  1024MB 3:  1024MB
> EDAC amd64: MC: 4:     0MB 5:     0MB
> EDAC amd64: MC: 6:     0MB 7:     0MB
> EDAC MC: DCT1 chip selects:
> EDAC amd64: MC: 0:     0MB 1:     0MB
> EDAC amd64: MC: 2:     0MB 3:     0MB
> EDAC amd64: MC: 4:     0MB 5:     0MB
> EDAC amd64: MC: 6:     0MB 7:     0MB
> EDAC amd64: using x4 syndromes.

Of course it doesn't, doh!, we need the DRAM chip selects from the
second DCT too. Can you please run this little script as root so that I
can verify that BIOS is actually programming sensible values in those in
ganged mode? (Yeah, leave your DCT setting to ganged in BIOS).

--
#!/bin/bash

i=0x140

while (( $i <= 0x15c )); do
        reg=$(printf "0x%x" $i)
        setpci -s 18.2 $reg.l
        i=$(($i+4))
done
--

Thanks.

-- 
Regards/Gruss,
Boris.

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