[U-Boot-Users] Enhanced SDRAM tests with u-boot
wd at denx.de
Tue Oct 21 02:17:13 CEST 2003
In message <FIEJJAKAABLMHFKFECNJGEKOGPAA.tschaefer at giga-stream.de> you wrote:
> I have problems with the Bringup of a custom MPC8280 board and I assume
> that SDRAM could be the reason. When performing memory tests on the
> complete SDRAM with the test routines included with u-boot 0.4.5,
> everything is working fine. Also, u-boot is running without problems.
> But when booting a (known to work) linux kernel (2.4.18, MontaVista
> 3.0), I get exceptions after decompressing the kernel (alignment, 0x600)
> and when executing the initial scripts (program, 0x700). So I would like
> to perform more sophisticated SDRAM tests with u-boot, including burst
> tests. Is there anybody who has done this before? Any hints are
I think it makes little sense to spend effort on additional RAM
tests. From the symptoms you describe you can be SURE that your RAM
initialization sequence is broken.
Better invest the time in fixing this.
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
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on to success. On the other hand, don't count on it. - T. K. Lawson
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