Date: Thu, 6 Dec 2001 10:03:05 -0700 From: Nate Williams <nate@yogotech.com> To: Ronald G Minnich <rminnich@lanl.gov> Cc: <freebsd-hackers@FreeBSD.ORG> Subject: Re: Re[2]: switching to real mode Message-ID: <15375.42185.608553.610033@caddis.yogotech.com> In-Reply-To: <Pine.LNX.4.33.0112060930220.17486-100000@snaresland.acl.lanl.gov> References: <1080523636.20011206191602@agava.com> <Pine.LNX.4.33.0112060930220.17486-100000@snaresland.acl.lanl.gov>
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> > I saw an example of switching in real mode in linux' sources (it looks > > pretty clear) and thouhgt it is possible to do the same under FreeBSD. > > The problem is I'm absolutely lost in FreeBSD's physical memory management > > implementation (page tables and directory and so on). > > That code is quite broken. You need to check out the ones I mentioned > earlier. All that the code does in the linux kernel is fail badly. > > Actually there used to be in freebsd some really nice code for popping > into real mode and back again. It was to support calling BIOS for certain > things. I believe the code is still there, and it's used for APM bios calls, if I remember correctly. Nate To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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