> > ... The other mapping is used for flash commands and to write data to flash.
> > Each time I read I do a invalidate_dcache_range() to pick up updates made
> > from
> > the uncached mapping.
>
> Why don't you do a single invalidate after the write to cover the region
> you just updated?
You read my mind :-). I tried this once before but failed, but that was
problably due to
some stupid mistake. Now I am ready to give it another try.
Just to make sure, I only need to invalidate the address space that actually
modify
the flash contents?
>
> > I was just hoping that the 'sync' instruction was an "accident", but now I
> > know
> > better.
>
> Those of us that have programmed PowerPC all of these years seldom include
> a 'sync' instruction by accident. We are more likely to not use them and
> then discover later they are necessary :-)
Amen :-)
But I still think it is a bit strange that you need a sync when you invalidate
since all
you want to do is throw away the data in the cache, but what do I know :-)
Jocke
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