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On Fri, 29 Aug 2014 16:58:26 +0200, Ravi Raj said:

so first step is to find an imx6 Arm a9 board and port linux to it

Why not get an imx6 board that already *HAS* Linux for it? Heck, Freescale will even give you a one day CLASS on it: http://cache.freescale.com/files/training/doc/dwf/DWF_LINUX_LABWORKBOOK.pdf (Did you bother trying to google 'imx6 arm a9 linux'? Lots of hits, lots of providers. ;)