Re: [Xenomai-help] Compiling Linux+Xenomai 32bits kernel on FC6 x86_64?

[Jan Kiszka <jan.kiszka@domain.hid>]

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Paul wrote:
> Hi Jan
> 
> On Wednesday 17 January 2007 18:19, Jan Kiszka wrote:
>>>> But the best is a Xenomai which supports 64-bit AMD processors :)
> 
> I've made a tentative stab at a couple of the kernel sources, but must admit 
> the assembly code scares the heck out of me....

I think the assembly part should be a smaller issue, certainly a
solvable one. You are invited to post your questions regarding this here
(or better on xenomai-core) so that we all can try to look at it. /me
has no x86-64 assembly experience yet, but I think to remember that it's
very similar to well-know i386.

The bigger issue with such ports are the testing/debugging cycles which
can cost quite some time if you are unlucky (or blind, or both ;)).

> 
>> [Really, it depends on someone feeling enough need to work on this (or
>> sponsor the work). A few pieces are already there from previous RTAI
>> efforts towards x86-64 support. But now it takes a clean implementation
>> over recent Linux/I-pipe/Xenomai.]
> 
> How much value is the 2.6.10 x86_64 patch from RTAI when it comes to working 
> on an I-pipe port for 2.6.19 ?

I would consider it as an inspiration for certain detail problems, also
regarding the assembly stuff. But the overall design is of no use
because it's old-style Adeos and likely has RTAI hacks included.

> 
> (I may well have an AMD64 socket 939 processor available for loan next week if 
> that would help).

Thanks, but for me this wouldn't change the situation.

Jan


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