man bus_dma(9)
> -----Original Message----- > From: Dinesh Nair [mailto:[EMAIL PROTECTED] > Sent: Tuesday, October 25, 2005 7:03 AM > To: Dinesh Nair > Cc: freebsd-hackers@freebsd.org > Subject: Re: correct use of bus_dmamap_sync > > > > On 10/25/05 21:15 Dinesh Nair said the following: > > the pseudo code for the read and write, called during an interrupt > > cycle, are: > > > > rx_func() > > { > > POSITION A > > > > while(there_is_some_data) { > > memcpy(somebuf, readbuf) > > } > > POSITION B > > } > > > > tx_func() > > { > > POSITION C > > > > while(there_is_some_data) { > > memcpy(writebuf, somebuf) > > } > > POSITION D > > } > > > > the question is, what op should i use for bus_dmamap_sync > in positions > > A, B, C and D ? > > responding to my own request, i mean which of > BUS_DMASYNC_PREREAD, BUS_DMASYNC_POSTREAD, > BUS_DMASYNC_PREWRITE, BUS_DMASYNC_POSTWRITE should i use, and where ? > > -- > Regards, /\_/\ "All dogs go to heaven." > [EMAIL PROTECTED] (0 0) http://www.alphaque.com/ > +==========================----oOO--(_)--OOo----============== ========== > +==+ > | for a in past present future; do > | > | for b in clients employers associates relatives > neighbours pets; do | > | echo "The opinions here in no way reflect the opinions of > my $a $b." | > | done; done > | > +============================================================= > ========== > +==+ > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to > "[EMAIL PROTECTED]" > _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
