From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfgang Denk Date: Tue, 21 Oct 2003 02:17:13 +0200 Subject: [U-Boot-Users] Enhanced SDRAM tests with u-boot In-Reply-To: Your message of "Mon, 20 Oct 2003 19:03:22 +0200." Message-ID: <20031021001718.86AC9C59E4@atlas.denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de In message 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 -- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de There is a time in the tides of men, Which, taken at its flood, leads on to success. On the other hand, don't count on it. - T. K. Lawson