I've seen it used for HyperTransport.  HT settings survive a warm_reset, but not a hard_reset.  I'm not sure if that's the only case, though.

Thanks,
Myles


On Thu, Jul 4, 2013 at 1:23 PM, Andrew Wu <andrewwu.tw@gmail.com> wrote:
Hello,

I am porting coreboot to our own product(Vortex86EX). I see there is a function called "hard_reset". Some boards implements this function, and some don't. Looks like each different mainboard has different implementation of hard_reset.

Now I just wrote a blank hard_reset function, but maybe it is not right.

So what is the purpose of this function? What should I put inside this function? To reset the system, why not just use system port(92h port)?


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