From: lokowich <lokowich@acdstar.com>
To: linuxppc-embedded@ozlabs.org
Subject: SDRAM failures on MPC5200B
Date: Fri, 20 Jul 2007 10:40:30 -0500 [thread overview]
Message-ID: <46A0D76E.4030101@acdstar.com> (raw)
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We're working on bringing up a MPC5200B version of our original MPC5200
board using U-Boot 1.1.4 configured for Icecube/Lite5200B. Other than
the CPU, the board is identical. The bootloader crashes just after
relocation to RAM, often with a Program Check Exception, typically a
memory corruption issue. I noticed failures at different stages after
relocation based on content, suggesting problems with upper SDRAM. If I
force the initram to 1/2 the determined size (64MB instead of 128MB),
then everything works well through kernel load and initialization.
We've added termination resistors to improve AD signals, to no avail.
Memory tests work fine too. Any help is appreciated.
Thanks,
Mark Lokowich
Systems Engineer
Advanced Communication Design
7901 12th Ave. So.
Bloomington, MN 55425
952-854-4000
lokowich@acdstar.com
This email was Anti Virus checked by Astaro Security Gateway. http://www.astaro.com
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next reply other threads:[~2007-07-20 16:07 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-20 15:40 lokowich [this message]
2007-07-20 16:46 ` SDRAM failures on MPC5200B Rafal Jaworowski
2007-07-20 17:03 ` Frank Bennett
2007-07-20 17:39 ` Florian A. Voegel
2007-11-13 13:59 ` lokowich
2007-11-13 14:40 ` Roman Fietze
2007-12-03 16:01 ` lokowich
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