rtai for ppc in 2.6

rtai for ppc in 2.6

[Randy Smith]

Hello,

A bit off topic, but I don't know where else to ask these questions.

I am working to port an existing Lite5200 application that uses rtai on 
the 2.4 kernel to a 2.6 kernel.  I have just noticed that support for 
rtai in 2.6 is limited to the i386 tree.  Is there anyone working on the 
ppc 2.6 rtai?  In looking at the rthal patch for the i386, it seems 
non-trivial.  Otherwise I guess it would be done by now. :-)  
Alternatively, I could rip out the rtai dependent code and just use the 
native 2.6 kernel's improvements for near realtime response and see how 
it goes but that route will take a little time.  I was hoping for a 
quick recompile and go. :-(  Any advice?

Also,  I have been reading about Adeos and rtai's adoption of this.  
Does this implementation preserve the same rtai interface?  It looks 
like it is in the same boat as the rthal for ppc 2.6.  Please correct me 
if I am wrong.

Thanks,

-Randy Smith
Software Engineer
ImageMap, Inc.

Re: rtai for ppc in 2.6

[Wolfgang Denk]

In message <4416EACF.2010802@imagemap.com> you wrote:
> 
> I am working to port an existing Lite5200 application that uses rtai on 
> the 2.4 kernel to a 2.6 kernel.  I have just noticed that support for 
> rtai in 2.6 is limited to the i386 tree.  Is there anyone working on the 
> ppc 2.6 rtai?  In looking at the rthal patch for the i386, it seems 

No, no such woirk is going on. And probably never will. RTAI is  dead
on  anything but x86. Actually it has never been completely ported to
PPC - things like LXRT are simply not portable.

> Alternatively, I could rip out the rtai dependent code and just use the 
> native 2.6 kernel's improvements for near realtime response and see how 
> it goes but that route will take a little time.  I was hoping for a 
> quick recompile and go. :-(  Any advice?

Yes. My advise is: use Xenomai. It works fine both on 2.4 and 2.6 and
is a major leap forward.

> Also,  I have been reading about Adeos and rtai's adoption of this.  

See www.xenomai.org ; then ask remaining  questions  on  the  xenomai
mailing lists.


Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
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