From: Andre Schwarz <andre.schwarz@matrix-vision.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] 36-bit u-boot
Date: Tue, 02 Nov 2010 10:55:39 +0100 [thread overview]
Message-ID: <4CCFE01B.6080304@matrix-vision.de> (raw)
In-Reply-To: <DC6F86A94046A64094043D44A3A708F70EE410E6@sestoex02.enea.se>
Leif,
> I have managed to flashed a 36-bits u-boot to my p4080 board.
>
> I have put in two 4Gb dimm into the board but it doesn't work.
>
> I got the following from u-boot.
>
>
[snip]
> DRAM: Initializing....
>
> Error: DDR_SDRAM_CFG[RD_EN] and DDR_SDRAM_CFG[2T_EN] should not be set at the same time.
>
"RD_EN" means "registered DIMM enable" which is read from PROM on memory
module.
Looks like you have CONFIG_DDR_2T_TIMING defined in your board header
... which is mutually exclusive with registered DIMM usage.
2T timing is only useful if you have AC timing violations regarding
setup/hold on Addr/Cmd Bus.
> Error: DDR_SDRAM_CFG[RD_EN] and DDR_SDRAM_CFG[2T_EN] should not be set at the same time.
>
> 6144M left unmapped
>
> DDR: 8 GB
>
> """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
>
> It seams that it is something wrong with the DDR initiation.
>
no.
You can either use unregistered DIMM modules or simply undefine
CONFIG_DDR_2T_TIMING.
Cheers,
Andr?
MATRIX VISION GmbH, Talstrasse 16, DE-71570 Oppenweiler
Registergericht: Amtsgericht Stuttgart, HRB 271090
Geschaeftsfuehrer: Gerhard Thullner, Werner Armingeon, Uwe Furtner
prev parent reply other threads:[~2010-11-02 9:55 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-29 16:02 [U-Boot] 36-bit u-boot Leif Sörman
2010-11-02 9:55 ` Andre Schwarz [this message]
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