From mboxrd@z Thu Jan  1 00:00:00 1970
From: Reda MIMOUNE <reda.mimoune@easii-ic.com>
Date: Fri, 17 Sep 2010 14:48:21 +0200
Subject: [U-Boot] RE : RE : Davinci DM365 custom design : Problem when
 reading uBoot environment variables
In-Reply-To: <20100917123721.0A2D015242D@gemini.denx.de>
References: <1918F436C366B34BB245DD28389E039453ADFAAD1E@mars.easii.fr>
	<20100915131514.7792c2ea@schlenkerla.am.freescale.net>
	<1918F436C366B34BB245DD28389E039453ADFAAD1F@mars.easii.fr>,
	<20100916115516.131b884d@schlenkerla.am.freescale.net>
	<1918F436C366B34BB245DD28389E039453ADFAAD25@mars.easii.fr>,
	<20100917123721.0A2D015242D@gemini.denx.de>
Message-ID: <1918F436C366B34BB245DD28389E039453ADFAAD2A@mars.easii.fr>
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To: u-boot@lists.denx.de

Hello Wolfgang
Thanks for answering.
Good to see that mkimage would be ok with both versions.

What do I fear ?  I traditionnaly saw many problems of version coherence between binaries and tools generating them.
Now I prefer to ask.

Concerning the #define, I made a mistake when recopying.

this should be OK.

	#define CFG_ENV_SECT_SIZE			SZ_128K   /* Env sector Size = 128KB*/
	#define CFG_ENV_SIZE				SZ_128K   /* 128KB is 1-Block size without counting spare*/

Concerning the size of 128KB. Obviously it is too much. I think it too. But reading the README file, here is what I read:

	Note: CFG_ENV_OFFSET and CFG_ENV_OFFSET_REDUND must be aligned
	to a block boundary, and CFG_ENV_SIZE must be a multiple of
	the NAND devices block size.

Since my sectors/blocks are 128KB, I must be at least 128KB!

Is the README file wrong ?
Thanks for your help.
Reda

________________________________________
De : Wolfgang Denk [wd at denx.de]
Date d'envoi : vendredi 17 septembre 2010 14:37
? : Reda MIMOUNE
Cc : Scott Wood; u-boot at lists.denx.de
Objet : Re: [U-Boot] RE : Davinci DM365 custom design : Problem when reading uBoot environment variables

Dear Reda MIMOUNE,

In message <1918F436C366B34BB245DD28389E039453ADFAAD25@mars.easii.fr> you wrote:
>
> Have a question about it, if I upgrade to a new version of uBoot. Is it guaranteed that mkimage
> will wrap the uboot binary the same way. Is mkimage the same version ?

Of course mkimage is not the same version. When upgrade to a new
version of U-Boot, you also get a new version of mkimage.

> If yes, I think I will upgrade.

Where would you expect problems?  You can build and test the new
version of mkimage before updating the U-Boot image on your target
board.

And you can keep the old mkimage tool around for reference as well.

> Of course, I understood that. My question was in the config file. I put this:
>
> #define CFG_ENV_SECT_SIZE                     SZ_16K
> #define CFG_ENV_SIZE                          SZ_128K

This makes no sense. I doubt that your NAND flash has 16 kB sectors.

Also I seriously doubt that you need 128 kB for environment.

> I saw something equivalent in the Evalution board of Davinci DM365 so it should not be
> impossible.

Please do not copy code without thinking.

Best regards,

Wolfgang Denk

--
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
All this doesn't alter anything, you know. The world is still full of
stupid people. They don't use their brains. They don't seem  to  want
to think straight.                    - Terry Pratchett, _Soul Music_