From mboxrd@z Thu Jan  1 00:00:00 1970
From: s.balamurugan <s.balamurugan@gdatech.co.in>
Date: Tue, 26 Feb 2008 23:00:17 +0530
Subject: [U-Boot-Users] Regarding Dcache Flush in MPC85xx
Message-ID: <47C44CA9.6010906@gdatech.co.in>
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,
We are using MPC8555 processor and uboot 1.1.4 both the uboot and linux 
was up. Now we plan to port QNX, we are facing following issues.

1. Qnx is not jumping to the startup location.  After giving go command 
control is still in the uboot only.

2.  When searching in the mailling list we came to know qnx required to 
flush the Data Cache before disabling it in the uboot level 
(common/cmd_bootelf.c line no:59)

3.  I checked other powerpc architecture like 7xx/74xx, 86xx and 4xx. 
These architecture  has seperate cache.S file ( cpu/mpc86xx/cache.S). That
file contains flush_data_cache function to flush the cache before 
disabling it. But in the MPC85xx flushing the data cache was missing.

4. This is a bug in the 85xx uboot code. Is there any work arround for 
this?

Thanks and Regards
S.Balamurugan