Re: [Xenomai] ODROID-U3 porting problems

[Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>]

On 08/28/2014 03:45 PM, GP Orcullo wrote:
> On Wed, Aug 27, 2014 at 11:45 PM, Gilles Chanteperdrix
>> So, this is a cortex a9. On Cortex a9, Xenomai tries to use the global
>> timer for tsc emulation. Are you sure this processor has a global timer?
>> Again, running the "tsc" program will help you see if the tsc emulation
>> is working correctly.
> 
> AFAIK, the exynos soc doesn't use twd - they have a multi-core timer
> instead. There is one global timer and a local timer for each core.
> 
> BTW, is it necessary that there should be an ipipe timer for each core
> or a single
> "global" one will do?

The global timer is not the same thing as the twd, and I was talking
about using the global timer as a clock source (for tsc emulation), not
as a timer, the advantage being that you would have a much better
resolution. Xenomai indeed requires local timer support (for which it
uses twd on cortex a9), that is one timer per core.

-- 
                                                                Gilles.