adrian bc81ea301e Add support for the MIPS74K SoC family performance counters events.
These are similar to the mips24k performance counters - some are
available on perfcnt0/3, some are available on perfcnt1/4.
However, the events aren't all the same.

* Add the events, named the same as from Linux oprofile.
* Verify they're the same as  "MIPS32(R) 74KTM Processor Core Family
  Software User's Manual"; Document Number: MD00519; Revision 01.05.
* Rename INSTRUCTIONS to something else, so it doesn't clash with
  the alias INSTRUCTIONS.  I'll try to tidy this up later; there
  are a few other aliases to add and shuffle around.

Tested:

* QCA9558 SoC (AP135 board) - MIPS74Kc core (no FPU.)
* make universe; where it didn't fail for other reasons.

TODO:

* It'd be nice to support the four performance counters
  in at least this hardware, rather than just two.

Reviewed by:	bsdimp ("looks good; don't break world".)
2015-04-05 02:57:02 +00:00
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