Date: Sat, 19 Apr 1997 10:23:01 +0200 From: j@uriah.heep.sax.de (J Wunsch) To: freebsd-hackers@FreeBSD.ORG Cc: krygier@kph.uni-mainz.de (Klaus Werner Krygier), toor@dyson.iquest.net (John S. Dyson) Subject: Re: special memory device Message-ID: <19970419102301.FO34910@uriah.heep.sax.de> In-Reply-To: <Pine.BSF.3.95q.970418234936.29149C-100000@krygierpc.kph.uni-mainz.de>; from Klaus Werner Krygier on Apr 19, 1997 00:21:04 %2B0200 References: <19970416004851.LL04161@uriah.heep.sax.de> <Pine.BSF.3.95q.970418234936.29149C-100000@krygierpc.kph.uni-mainz.de>
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As Klaus Werner Krygier wrote: > This means that the notification about the page fault > seems to be done by calling the driver's mmap routine. Here I can > reprogram the interface card. The validation of the now visible window > is done automatically. The only problem that remains is, how to invalidate > the pages for the old window so that a page fault will be generated > again if this window is accessed later. Ask John. :) I think you gotta call some *unmap() function, but i'm not confident with the API, and John never got around to actually write something like a man page for the VM system (hint, hint :). -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)
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