Date: Mon, 16 Jul 2007 12:52:46 -0400 From: John Baldwin <jhb@freebsd.org> To: Nate Lawson <nate@root.org> Cc: acpi@freebsd.org, freebsd-current@freebsd.org Subject: Re: smi speedstep patch Message-ID: <200707161252.46540.jhb@freebsd.org> In-Reply-To: <469B91FD.6080904@root.org> References: <46735262.50601@root.org> <200707160845.26597.jhb@freebsd.org> <469B91FD.6080904@root.org>
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On Monday 16 July 2007 11:42:53 am Nate Lawson wrote: > John Baldwin wrote: > > On Saturday 16 June 2007 01:09:27 pm Nate Lawson wrote: > >> Nate Lawson wrote: > >>> Nate Lawson wrote: > >>>> If you have a pentium 3 that works for speedstep, please try this patch. > >>>> It fixes the PAE case. Compile-tested. > >>> Hmm, I see it's no longer getting the physical address, just virtual. > >>> So need to fix that part. > >> Attached is the updated patch. It uses the low kernel map where P=V and > >> fixes the callback. I just need someone who is using smi-speedstep > >> (440bx chipset with pentium 3) to make sure the device still attaches. > >> Patch should work on 6.x and 7.x. > > > > Why do you need a V == P page? > > I don't. I was just trying to choose a range where I was guaranteed > there would be any mapping at all. Aren't there some physical regions > (VGA, ISA hole) that don't have a mapping? Thus, it's best to ask for > RAM at 1 MB+ unless the device has special requirements, right? > > BTW, this is already committed to -current. What do you mean by a range that doesn't have a "mapping"? Do you mean you want bus_dma to give you memory not already in use? Why would it do that? :) Why can't you just allocate any buffer under 4GB? -- John Baldwin
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