BSP benchmark timer to be replaced with RTEMS counter support?

[Amaan Cheval]

That clarifies it. Thank you for the quick and specific response!


On Fri, Mar 23, 2018 at 5:37 PM Sebastian Huber <
sebastian.huber at embedded-brains.de> wrote:

> On 23/03/18 12:47, Amaan Cheval wrote:
> > The BSP porting guide[1] includes this warning when talking about the
> > benchmark timer driver:
> >
> >> The Timer Driver is superfluous and should be replaced by the RTEMS
> > counter support. Ask on the mailing list if you plan to write a Timer
> > Driver.
> >
> > We also have this[2] open ticket about the same issue. It seems like this
> > might be a part of the BSP's clock driver, exposed through the
> > "_CPU_Counter_read" function. Is that right?
> >
> > The tests in ./testsuites/tmtests/ do call several benchmark_timer_*
> > functions, so I imagine the warning means that we can implement these
> > functions using the counter instead of reading the hardware timer by
> itself
> > as the guide shows?
>
> For new BSPs, please implement the CPU counter and use
>
> c/src/lib/libbsp/shared/timercpucounter.c
>
> for the timer driver.
>
> >
> > (For context: this is relevant to my GSoC plan for the x86_64 port and
> BSP;
> > I'd like to architect it to be of a style which the RTEMS community deems
> > ideal, despite other BSPs not quite being there yet, understandably.)
> >
> > [1] https://docs.rtems.org/branches/master/bsp-howto/timer.html
> > [2] https://devel.rtems.org/ticket/2847
> > _______________________________________________
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>
> --
> Sebastian Huber, embedded brains GmbH
>
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