wd at denx.de
Thu Nov 13 06:45:49 EST 2003
in message <DEF39A0710293E489D45B10E06645CBD026719AB at dub-msx1.spectelcorp.com> you wrote:
> The SDRAM parameters used for initialisation have been fully verified
Parameters is one thing, the init sequence is another story. Boith
are required, or you will see strange crashes as soon as the system
starts using burst mode heavily.
> with this board, as we have used them with another RTOS, without any
That does not mean anything. Really. We have seen boards that used to
run pSOS+ for years without problem, but would crash reliably under
Linux. The problems went away after fixing the RAM initialization.
Your problem is a FAQ on the PPCboot / U-Boot mailing lists.
> Aditionaly I ran the u-boot mtest utility on sections of the RAM to
> ensure the configuration was good.
Again, that doesn't mean anything, as this test performs simple read
/ write cycles. It will not cause any accesses in burst mode.
> I believe that rules out bad SDRAM configuration.
I disagree. I've seen this too many times before.
> I thought that could give me an idea if inflate was writing outside the
> virtual address range.
I think you're on the wrong track. But I may be wrong, of course.
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
"Just Say No." - Nancy Reagan
"No." - Ronald Reagan
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