Re: Read CCNT on PXA255

[Gilles Chanteperdrix <gilles.chanteperdrix@xxxxxxxxxxx>]

Junaid Jamil wrote:
> Dear Gilles,
> 
> Thanks for referring me to use OSCR. Actually I m very new to this
> linux stuff. Can you please show me an example program of how to mmap
> this. It will be a great help.

Please do not drop the mailing list from CC.

You will find an example of mmaping /dev/mem in the devmem2.c program,
mentioned by the FAQ for this mailing list.

You will find another example of this in Xenomai sources: Xenomai
emulates the PC's tsc on ARM by mapping with /dev/mem the hardware
free-running counter or decrementer used as a timer source, with an
additional trick to get a full 64 bits tsc. The file of interest is
include/asm-arm/syscall.h.

-- 


					    Gilles.

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