help, trying to invalidate entire icache on 970

[Segher Boessenkool]

> IIRC to modify an instruction you need the following sequence to do
> flush the icache correctly:
>
> 	dcbst
> 	sync
> 	icbi
> 	isync
>
> I can't remember if the 970 actually requires this sequence or not.

It does not, as the DL1 cache is store-through; i.e., the dcbst insn
is superfluous here (the sync is required in general, though!)


Segher