Messages in this thread | | | From | Oliver Neukum <> | Subject | Re: PCI DMA to small buffers on cache-incoherent arch | Date | Sun, 9 Jun 2002 08:50:04 +0200 |
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> For memory --> device DMA: > > 1. write back all cache lines affected by the DMA > 2. start the DMA > 3. invalidate the above cache lines
Why the third step ? That data should still be valid.
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