From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Updegraff <dave@cray.com>
Date: Fri, 04 Nov 2005 08:16:16 -0600
Subject: [U-Boot-Users] slow memory running from flash.
Message-ID: <436B6D30.9080405@cray.com>
List-Id: <u-boot.lists.denx.de>
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To: u-boot@lists.denx.de

Hi.

I have an MPC8343 that runs its memory _VERY_ slowly when I run code
from flash.  Identical u-boot code loaded into RAM and run from there is
fine, and 10x or more faster for memcopy and dma_xfer.  I.e. the IMMBAR
setup registers for memory are identical.  Eg. the 'relocate_code()'
routine takes 5 seconds if i am running from flash, but negligible time
if running from RAM.

The only difference in u-boot code is that when running from ram, the
remap_flash_by_XYZ games in start.S are not played.  All dcache issues
are the same either way.

I wonder if anyone has a clue for me about why this might be?

-dbu.