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Date: Mon, 12 Oct 2009 19:04:43 +0530
Message-ID: <a9b543570910120634n286693f3s15b39970ad9d1c74@mail.gmail.com>
Subject: Re: linux booting fails on ppc440x5 with SRAM
From: Vineeth _ <blacklites@gmail.com>
To: Wolfgang Denk <wd@denx.de>
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Hi Wolfgang,

The link says about the initialization of the SDRAM; Does it
applicable in our case, where we have SRAM on our board. Does the
initialization means just clearing the memory in case of SRAM ? We
tried clearing the memory before the operation which doesnt work too.
We are creating a TLB of 16MB for the SRAM which is not cachable	.

-Vineeth

On Fri, Oct 9, 2009 at 5:03 PM, Wolfgang Denk <wd@denx.de> wrote:
> Dear Vineeth _,
>
> In message <a9b543570910090320t1444f8f1qf4c8ab7dbbef679f@mail.gmail.com> =
you wrote:
>> We ported the uboot Memory test and tested the 15MB ram and it was
>> successful.interestingly we have only 16MB SRAM in our board.We used 1
>
> Such a memory test means nothing. The only thing you can learn from it
> is that basic read and write accesses are working. You don;t get any
> information about the behaviour for burst mode accesses from such a
> test. See the FAQ at
> http://www.denx.de/wiki/view/DULG/LinuxCrashesRandomly =A0and at
> http://www.denx.de/wiki/DULG/UBootCrashAfterRelocation
>
> Best regards,
>
> Wolfgang Denk
>
> --
> DENX Software Engineering GmbH, =A0 =A0 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@denx.de
> I mean, I . . . think to understand you, I just don't know =A0what =A0you
> are saying ... =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0- Terry Pra=
tchett, _Soul Music_
>