Performance improvement Montavista 3.0 MPC8260 by D-cache enable

Performance improvement Montavista 3.0 MPC8260 by D-cache enable

[Om Vadlapatla]

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

[Om Vadlapatla]

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
> 
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam
> protection around 
> http://mail.yahoo.com 
> _______________________________________________
> Linuxppc-embedded mailing list
> Linuxppc-embedded@ozlabs.org
>
https://ozlabs.org/mailman/listinfo/linuxppc-embedded
> 


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

[Wolfgang Denk]

In message <20060503142655.2152.qmail@web37101.mail.mud.yahoo.com> you wrote:
> I want to confirm if the Montavista linux version 3.0
> for the MPC8260 has the data cache working.

Haven't you been told this at least 5 times before ?!?

*PLONK!*


Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
 The software required `Windows 95 or better', so I installed Linux.