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From: Marek Vasut <marex@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] mx28evk: Scan only first 512 MB of DRAM to avoid memory wraparound
Date: Sat, 12 May 2012 19:06:35 +0200	[thread overview]
Message-ID: <201205121906.35600.marex@denx.de> (raw)
In-Reply-To: <CAOMZO5DgSyMVo0KE3tQAAw=bVL9LV-Kk2WZzb+pW763bnLwekQ@mail.gmail.com>

Dear Fabio Estevam,

> On Sat, May 12, 2012 at 1:19 PM, Marek Vasut <marex@denx.de> wrote:
> > All right, this approach is valid then. Btw. Fabio, can you verify that
> > you don't see any memory aliasing now (just to avoid trouble).
> 
> How can I verify this, please?

Try writing some pattern into DRAM at "offset-sizeof(pattern area)" and try 
reading it from "2*offset + sizeof(pattern area)" ... try doing the same for 
4*offset etc.

You might also be able to read data from memory behind what uboot considers as 
detected DRAM which will have the same contents as the detected DRAM etc. 

> 
> Regards,
> 
> Fabio Estevam

Best regards,
Marek Vasut

  reply	other threads:[~2012-05-12 17:06 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-05-12 16:07 [U-Boot] [PATCH] mx28evk: Scan only first 512 MB of DRAM to avoid memory wraparound Fabio Estevam
2012-05-12 16:10 ` Marek Vasut
2012-05-12 16:14   ` Fabio Estevam
2012-05-12 16:19     ` Marek Vasut
2012-05-12 16:40       ` Fabio Estevam
2012-05-12 17:06         ` Marek Vasut [this message]
2012-05-12 16:51       ` Fabio Estevam
2012-05-12 17:07         ` Marek Vasut
2012-05-12 21:22 ` Wolfgang Denk

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