Re: [Gems-users] invalidating a cache block

[Dan Gibson <degibson@xxxxxxxx>]

You could 'force' another processor to issue stores to all the blocks in the cache you need to invalidate. Of course, I'm not sure if this would be applicable, since I don't know why you want the blocks invalidated.

Mladen Nikitovic wrote:

Sorry, I forgot to actually specify my question :)

Since I don't belive the stxa instruction will fully generate the 
desired events I wonder how I can achieve that in ruby. How can I 
trigger the protocol to do the invalidation and possible writebacks for me?

Regards,
/Mladen

Mladen Nikitovic wrote:
  

Hi,

I would like to go through a cache and invalidate each entry 
block-by-block. I would like to do it in a way such that necessary 
events within ruby (replacements if needed) are triggered.

I found a code in opensolaris that is supposed to flush the cache (see 
below) but I suppose that the instruction stxa will not trigger the 
expected events in GEMS?

#define CH_CACHE_FLUSHALL(arg1, arg2, tmp1)

  sub arg1,arg2,tmp1;
1:
  stxa %g0, [tmp1]ASI_DC_TAG;
  membar #sync;
  cmp %g0, tmp1;
  bne,pt %icc, 1b;
  sub tmp1, arg2, tmp1;


I'm using the MOESI_CMP_directory protocol.

Thanks.

Regards,
Mladen




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