CMPXHG8B Support

[Alex Ionescu]

I was asked on IRC to add support for non-Intel and AMD CPUs to the kernel.

Obviously I can't do that -- but I mentioned that some special "magic
tricks" need to be done to enable support for the instruction on other
CPUs, which is why I made the kernel bugcheck.

Thankfully, someone documented the steps required, so I won't get in
trouble for pointing out this link for you:
http://www.geoffchappell.com/notes/windows/kernel/cpu/cx8.htm.

I can confirm that's what the kernel does. Do that too, and you can
then support Transmeta/Rise/VIA CPUs.

Best regards,
Alex Ionescu

[KJK::Hyperion]

Alex Ionescu wrote:
>   I can confirm that's what the kernel does. Do that
> too, and you can
>  then support Transmeta/Rise/VIA CPUs. 
Done, done and done. Could you please review my implementation?
http://svn.reactos.org/viewcvs/reactos?view=rev&revision=36610