From mboxrd@z Thu Jan  1 00:00:00 1970
From: gshan <gshan@alcatel-lucent.com>
Date: Thu, 12 Apr 2007 10:20:21 +0800
Subject: [U-Boot-Users] Command "dcache on" for MPC850 isn't valid
In-Reply-To: <20070411130942.26E19352658@atlas.denx.de>
References: <20070411130942.26E19352658@atlas.denx.de>
Message-ID: <461D9765.7060502@alcatel-lucent.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

Denk,

Thanks for your quick response. But linux kernel need to turn on data 
cache at head_8xx.S::initial_mmu.

Thanks,
Gavin

Wolfgang Denk wrote:
> In message <461C6D9A.7010001@alcatel-lucent.com> you wrote:
>   
>> As everyone knew, uboot for MPC850 didn't turn on data cache, but 
>>     
>
> Yes, and for a very good reason, which is explained in detail in the
> README.
>
>   
>> instruction cache is on. In order to test data cache, I added 
>> CFG_CMD_CACHE  for CONFIG_COMMANDS. However, the CPU is spinning once I 
>> issue command "dcache on".
>>
>> Any ideas on this?
>>     
>
> Read the README.
>
> Best regards,
>
> Wolfgang Denk
>
>