Re: Once again: test_and_set for CPUs w/o LL/SC

["Maciej W. Rozycki" <macro@ds2.pg.gda.pl>]

On Mon, 7 Oct 2002, Kevin D. Kissell wrote:

> That's probably going to be a more reliable design,
> though I would still consider leaving the TLB refill handler
> untouched and counting on the fact that k1 must contain
> a non-lethal EntryLo value on return from the exception.

 Well, there is a "nop" just before the "eret" in all R4k-style TLB
exception handlers.  I see no problem to use the slot for explicit
clobbering of k0 or k1 with a single instruction like "li" or "lui". 

-- 
+  Maciej W. Rozycki, Technical University of Gdansk, Poland   +
+--------------------------------------------------------------+
+        e-mail: macro@ds2.pg.gda.pl, PGP key available        +