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Date: Wed, 3 May 2006 11:34:43 -0700 (PDT)
From: Om Vadlapatla <pdfdoc15@yahoo.com>
Subject: RE: Performance improvement Montavista 3.0 MPC8260 by D-cache enable
To: srideep.devireddy@wipro.com, linuxppc-embedded@ozlabs.org
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How do you suggest I go about enabling the data cache 
with out running into the machine check exception
(0200 exception). 

I need the data cache as there is lot of data access
in the applications we run on our SDH unit.

OS Montavista 3.0
Processor MPC8260

Register required to madify: HID0 (bit 17 to be set)
=> controlword is: HID0 OR 000004000 => sets the 17th
bit

but this gives me the 0200 exception

are there any kernel routines I can run to get this to
work?

Thank you,
Sincerely,
Om Vadlapatla  

--- srideep.devireddy@wipro.com wrote:

> Data chache is not enabled you have to enable it
> ......
> 
> srideep
> 
> -----Original Message-----
> From:
>
linuxppc-embedded-bounces+srideep.devireddy=wipro.com@ozlabs.org
>
[mailto:linuxppc-embedded-bounces+srideep.devireddy=wipro.com@ozlabs.org
> ] On Behalf Of Om Vadlapatla
> Sent: Wednesday, May 03, 2006 7:57 PM
> To: linuxppc-embedded@ozlabs.org
> Subject: Performance improvement Montavista 3.0
> MPC8260 by D-cache
> enable
> 
> I want to confirm if the Montavista linux version
> 3.0
> for the MPC8260 has the data cache working.
> 
> I work on an SDH unit that uses 2 channels and we
> are
> about to recieve a shipment of new harware that has
> to
> support 4 serial optical channels.
> 
> I need to confirm if the version of linux we are
> using
> has the data chache enabled as I am about to spend a
> lot of time on the data cache.
> 
> Thank you,
> Best Regards,
> 
> Om Vadlapatla
> 
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