Performance improvement Montavista 3.0 MPC8260 by D-cache enable
Om Vadlapatla
pdfdoc15 at yahoo.com
Thu May 4 04:34:43 EST 2006
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 at wipro.com wrote:
> Data chache is not enabled you have to enable it
> ......
>
> srideep
>
> -----Original Message-----
> From:
>
linuxppc-embedded-bounces+srideep.devireddy=wipro.com at ozlabs.org
>
[mailto:linuxppc-embedded-bounces+srideep.devireddy=wipro.com at ozlabs.org
> ] On Behalf Of Om Vadlapatla
> Sent: Wednesday, May 03, 2006 7:57 PM
> To: linuxppc-embedded at 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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