RE: Performance improvement Montavista 3.0 MPC8260 by D-cache enable

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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