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Enabling ECC ram: possible?

Posted by bobafetthotmail 
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bobafetthotmail
Enabling ECC ram: possible?
May 16, 2016 04:45AM
I was wondering about the possibility to enable ECC for the RAM.

The SoC supports it, and afaik the only difference in PC DIMMs is that they add a chip to compensate for the RAM space used by checksums.

So, would it be possible to enable ECC in a kirkwood? RAM space will probably decrease so it may be worth it for 256+ RAM devices only.

I'm asking in the uBoot section because I think it must be done by uBoot.
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bodhi
Re: Enabling ECC ram: possible?
May 16, 2016 11:58AM
bobafetthotmail,

I don't think Kirkwood 6281 suports it. Was that from Marvell literature somewhere? Even if it did, I think we have to write a bunch of specific code to tell the DDR controller, too.

-bodhi
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bobafetthotmail
Re: Enabling ECC ram: possible?
May 18, 2016 08:50AM
Umm, I got confused by the "ECC not enabled" message I see when booting Uboot then. I assumed that the "not enabled" meant that it was there but not.. well.. enabled. :)
Is that message from stock uboot code?

In the datasheet there is no reference about ECC. Nevermind then.
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bodhi
Re: Enabling ECC ram: possible?
May 18, 2016 12:50PM
> Is that message from stock uboot code?

I think it is from kernel bootlog and stock u-boot.

-bodhi
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