on 11/01/2012 00:23 Matthew Jacob said the following: >>> At the very least, require bounce buffers. >> >> Not sure if I got this suggestion in this terse form. >> Could you please explain? > > Physical address zero can be DMA'd, but via bounce buffers. > bcopy from address zero up through a pagesize to a bounce buffer, do the dma > from there (read case), write case the opposite order
Ah, right. I think that that's what the patch tries to do (among other things) if the flag is set. -- Andriy Gapon _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
