[U-Boot] Problem with SDRAM on my board.

[Gutierrez Gomez Jesus-B16947]

Hi Lasse Skov,

Are you 100% sure the timing setup of your board's SDRAM are okay? If you copied the setup from another board (with another SDRAM chip), it might be the case where you're not meeting the timing characteristics of the new SDRAM chip and therefore SDRAM will have problems when more transactions are demanded (for example, U-boot relocation, or mtest).

Please double check the timing spec of your SDRAM chip (or perhaps the whole configuration) and adjust U-boot accordingly to set them up.

Saludos!

Jesús Gutiérrez.

-----Original Message-----
From: u-boot-bounces at lists.denx.de [mailto:u-boot-bounces at lists.denx.de] On Behalf Of Lasse Skov
Sent: Lunes, 23 de Noviembre de 2009 05:14 a.m.
To: u-boot at lists.denx.de
Subject: [U-Boot] Problem with SDRAM on my board.

Hello

I have ported the uboot for my own board.
But something is going wrong when uboot try to relocate itself to ram. But it is only sometimes its fail.
Often it work but i then do a mtest in uboot it goes down.

I used the mpc837xerdb as a reference. When it fails it look likes it is when it try to cmp (from the start.s file) the copyed data to the ram.

Anyone had any idea ther maybe could help me a little bit?

/Lasse Skov

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