Date: Fri, 3 Aug 2001 12:48:20 -0300 (BRST) From: Rik van Riel <riel@conectiva.com.br> To: Terry Lambert <tlambert2@mindspring.com> Cc: Julian Elischer <julian@elischer.org>, Kenneth Wayne Culver <culverk@wam.umd.edu>, John Baldwin <jhb@FreeBSD.org>, <freebsd-hackers@FreeBSD.org>, craig <craiglei@pasia.com.cn> Subject: Re: How to visit physical memory above 4G? Message-ID: <Pine.LNX.4.33L.0108031247210.11893-100000@imladris.rielhome.conectiva> In-Reply-To: <3B6A369F.C35B7B03@mindspring.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Thu, 2 Aug 2001, Terry Lambert wrote: > Correct me if I'm wrong, and 64 bit PCI cards can in fact > DMA at offsets above 4G, in the physical address space... They can. And for 32 bit PCI cards you simply use bounce buffers in the same way you handle ISA bounce buffers. It's ugly, but if you have a huge dataset it's better than getting the data from disk. Rik -- Virtual memory is like a game you can't win; However, without VM there's truly nothing to lose... http://www.surriel.com/ http://distro.conectiva.com/ Send all your spam to aardvark@nl.linux.org (spam digging piggy) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.LNX.4.33L.0108031247210.11893-100000>