From mboxrd@z Thu Jan  1 00:00:00 1970
From: Matej Kupljen <matej.kupljen@ultra.si>
Date: Thu, 12 May 2005 11:06:07 +0200
Subject: [U-Boot-Users] memory probe
In-Reply-To: <20050512084229.CA115C1512@atlas.denx.de>
References: <20050512084229.CA115C1512@atlas.denx.de>
Message-ID: <1115888767.9698.6.camel@orionlinux.starfleet.com>
List-Id: <u-boot.lists.denx.de>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
To: u-boot@lists.denx.de

Hi

> > to properly initialise SDRAM. You can use this code only to report
> > the memory size to U-Boot and the Linux.
> 
> No, this code is used to ADJUST the memory controller to  the  actual
> sizes found on the board - you start with a preliminary configuration
> of  the  memory  controller which assumes that all possible banks are
> fitted with the maximum amountof memory; then you run  get_ram_size()
> on  all  of these banks, disable those where a size of 0 is reported,
> and adjust controller settings according to the  sizes  reported  for
> the others.

I see.
But how can you determine the number of Column/Row address bits and the
number of internal SDRAM banks?
Those are the values for the registers MDCNFG for PXA255, for example.

BR,
Matej