Setting GPIO BeagleBoard xm

Hello:

I have a BeagleBoard XM with Archlinux and the next specifications:

Linux asarm 3.14.2-1-ARCH #1 SMP PREEMPT Tue Apr 29 18:48:53 MDT 2014 armv7l GNU
/Linux

I don’t know to setting my Beagleboard xm to use the GPIOS and i am new in this.

I hope prompt response.

Thanks

YAO