[Xenomai] rtdm on mercury

[Xenomai] rtdm on mercury

[Richard Cochran]

Hallo list,

I have been just getting to know xenomai-3 after a long time of
xenomai abstinence.  IIRC, there has been some talk in the past of
supporting rtdm in mercury for both user space and drivers.  But
looking at the present state, I don't see any sign of this having been
implemented.

Am I missing something?

[ background: wanting to write a driver for custom FPGA based hardware
  device, and the driver should work with and without cobalt.  I have
  done this before by making the driver code portable to both normal
  kernel and rtdm.  It would be nice to be able to write a pure rtdm
  driver and have it "just work" in a plain kernel. ]

Thanks,
Richard

Re: [Xenomai] rtdm on mercury

[Philippe Gerum]

Hi Richard,

On 01/27/2015 09:19 AM, Richard Cochran wrote:
> Hallo list,
> 
> I have been just getting to know xenomai-3 after a long time of
> xenomai abstinence.  IIRC, there has been some talk in the past of
> supporting rtdm in mercury for both user space and drivers.  But
> looking at the present state, I don't see any sign of this having been
> implemented.
> 
> Am I missing something?
> 
> [ background: wanting to write a driver for custom FPGA based hardware
>   device, and the driver should work with and without cobalt.  I have
>   done this before by making the driver code portable to both normal
>   kernel and rtdm.  It would be nice to be able to write a pure rtdm
>   driver and have it "just work" in a plain kernel. ]
> 

This work is still in the planning stage. We had to wait for the dust to
settle on the RTDM API changes that took place in 3.x. Implementing a
revised version of the native incarnation of RTDM is next.

-- 
Philippe.