Date: Mon, 9 Jun 2003 07:52:33 -0400 From: "cd_freebsd" <cd_freebsd@gatorzone.com> To: <freebsd-hackers@freebsd.org> Subject: Re: Mapping Physical Memory without a Device? Message-ID: <200306090752.AA157221012@gatorzone.com>
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jmallett@freebsd.org writes >> You may also want to consider pmap_map. It depends on what your >>requirements are? while Bruce M Simpson [bms@spc.org] writes >>It's quite evil and not machine independent..avoid. -Who is right? (I like Juli's answer and she has FreeBSD.org in her name :) ) -Why is pmap_mapdev bad? -What makes it machine dependent? -What is the difference between pmap_devmap and pmap_map? My requirements would be to map some or all of the following memory areas that are not associated with any device I own: 1) BIOS & UMB ram (0xC0000-0xFFFFF) 2) VGA Video buffer (0xA0000-0xBFFFF) 3) Video Frame buffer (0x????0000-0x????0000)
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