[U-Boot-Users] [patch] MPC8266 March-C memory test

Nye Liu nyet at mrv.com
Wed May 21 01:51:43 CEST 2003

Stupid question:

Will load/store string/multiple cause a burst if i implement a test
in asm?

On Tue, May 20, 2003 at 09:55:40PM +0200, Wolfgang Denk wrote:
> In message <20030519220854.GA15969 at zumanetworks.com> you wrote:
> > Should this also be portable to the 8xx[F]ADS platforms?
> Please note that  there  is  also  extensive  POST  code  for  MPC8xx
> systems, which includes an IMHO excellent memory test.
> > I am currently debugging UPM/memory problems, and a real memory test
> > would be invaluable :)
> It won't help  much.  Usually  memory  tests  test  just  the  memory
> _contents_  using  read  and  write  accesses,  while  99% of all RAM
> problems happen in burst mode, i. e. while fetching  instructions  or
> while  doing  DMA.  I  have  yet  to see a RAM test that catches this
> reliably.
> Best regards,
> Wolfgang Denk
> -- 
> Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
> Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
> Do not underestimate the value of print statements for debugging.
> Don't have aesthetic convulsions when using them, either.

Nye Liu
nliu at mrv.com
(818) 772-6235x248

"Who would be stupid enough to quote a fictitious character?"
	-- Don Quixote

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