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From: "Eric Bénard" <eric@eukrea.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 1/1] Add support for Eukrea CPU9260 SBC
Date: Thu, 16 Jul 2009 18:02:17 +0200	[thread overview]
Message-ID: <4A5F4F09.2090406@eukrea.com> (raw)
In-Reply-To: <20090716142229.C66BC832E416@gemini.denx.de>

Dear Wolfgang,

Wolfgang Denk a ?crit :
>> I'm not sure it's possible to use a generic geometry/timings there else 
>> u-boot may never relocate.
>> How would you do this ?
> 
> Well, normally you have 2 or 3 row/col combinations that have to be
> considered; you try these in turn until you find one where
> get_ram_size() returns a non-zero size; if several work, you use that
> which returns the biggest size.
> 
> See for example "board/tqc/tqm8xx/tqm8xx.c" - it tries 8, 9 and 10
> column mode...
> 
I've tried something very close to what is done in tqm8xx but I don't 
manage to get something reliable : either it hangs or I get data abort.

After checking the datasheet, I don't understand how we can change the 
geometry of this SDRAM controler while running from SDRAM : each time we 
increase the colum number, the address are modified thus we can't 
execute any more u-boot's code as it's no more where we are expecting it.

Eric

  reply	other threads:[~2009-07-16 16:02 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-07-16  9:13 [U-Boot] [PATCH 1/1] Add support for Eukrea CPU9260 SBC Eric Benard
2009-07-16 12:29 ` Wolfgang Denk
2009-07-16 12:45   ` Eric Bénard
2009-07-16 14:22     ` Wolfgang Denk
2009-07-16 16:02       ` Eric Bénard [this message]
2009-07-16 16:41         ` Alessandro Rubini
2009-07-16 18:22           ` Eric Bénard
2009-07-17 21:24           ` Wolfgang Denk
2009-07-18 21:10             ` Alessandro Rubini
2009-07-17 21:21         ` Wolfgang Denk

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