Given AMD's announced roadmap[1], I'd say it's more likely to come in 2016. Next year, they'll still be doing mostly stock ARM cores.

[1] http://www.anandtech.com/show/7990/amd-announces-k12-core-cu...

Yeah, I didn't mean AMD's ARM cores, but when the other founding members of HSA are going to use it for ARM.

Reference? I cant find any evidence apple is shipping HSA devices.

As far as I understand, the A7 employs a shared memory architecture and Apple did not publicize this fact until the recent developer conference.

http://appleinsider.com/articles/14/06/16/inside-metal-how-a...

HSA's requirements are far broader than those provided in Metal. A7's shared memory implementation appears to be far too basic to be able to implement HSA-type API. For example, on-demand paging, user-mode queueing and ability for GPU to do CPU callbacks. Many systems can have shared memory but are not HSA compliant.

Samsung, Qualcomm and TI all produce ARM chips and are all in the HSA foundation[1], so the wait is not on AMD.

http://www.hsafoundation.com

Samsung and TI don't design their own GPUs so it'd be surprising to see them outpacing AMD in this. Qualcomm's efforts also appear to be behind AMD so far, and they don't appear to have as much priority for it as AMD does.

Though HSA isn't just about CPU-GPU coherence. It includes DSPs, etc. TI makes plenty of DSPs. Not sure about Samsung.

Looks like K12 SOCs will have x86 and ARM cores. I'm guessing HSA will be involved.