On May 7, 2005, at 2:10 PM, Joakim Tjernlund wrote:
> Not completly sure that this is correct. There are a few:
> addi r10, r10, 0x0100
> mtspr SPRN_MD_CTR, r10
> later on which will "overflow" 0x1f00 into 0x2000 etc.
Oh right, I forgot I did that. I explicitly set the tlb index before
each write. Sorry, I thought it was due to more bits of index
in the 885.
So, I guess what was there should have worked.
OK, so the reason TLB pinning doesn't work is a tlbie() can
evict the pinned entry. That stupid code in the cpm reset
will throw them out, plus anything else that would do a
tlbie() of a kernel address within the pinned space (like
the update_mmu_cache() hack). We have to fix those,
and look for any others where that may happen.
Thanks.
-- Dan
