[U-Boot-Users] Enhanced SDRAM tests with u-boot
Hi all,
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 appreciated.
Best regards
Thomas Schäfer
____________________________________
GIGA STREAM GmbH
Konrad-Zuse-Str. 7 66115 Saarbrücken
Tel.: + 49 (0)681 / 95916 - 203 Fax: + 49 (0)681 / 95916 - 100 E-mail: tschaefer@giga-stream.de
In message FIEJJAKAABLMHFKFECNJGEKOGPAA.tschaefer@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 appreciated.
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.
Best regards,
Wolfgang Denk
participants (2)
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Thomas Schäfer -
Wolfgang Denk