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From: gshan <gshan@alcatel-lucent.com>
To: u-boot@lists.denx.de
Subject: [U-Boot-Users] Command "dcache on" for MPC850 isn't valid
Date: Thu, 12 Apr 2007 10:20:21 +0800	[thread overview]
Message-ID: <461D9765.7060502@alcatel-lucent.com> (raw)
In-Reply-To: <20070411130942.26E19352658@atlas.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
>
>   

  reply	other threads:[~2007-04-12  2:20 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-04-11  5:09 [U-Boot-Users] Command "dcache on" for MPC850 isn't valid gshan
2007-04-11 13:09 ` Wolfgang Denk
2007-04-12  2:20   ` gshan [this message]
2007-04-12  7:26     ` Wolfgang Denk

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