Date: Fri, 17 Sep 2004 21:08:50 +0200 From: Francois Tigeot <ftigeot@wolfpond.org> To: Peter Wemm <peter@wemm.org> Cc: freebsd-amd64@freebsd.org Subject: Re: bios.h question Message-ID: <20040917190850.GA69926@aoi.wolfpond.org> In-Reply-To: <200409170907.18458.peter@wemm.org> References: <20040914150419.GA7191@aoi.wolfpond.org> <200409141543.13318.peter@wemm.org> <20040915063512.GA10104@aoi.wolfpond.org> <200409170907.18458.peter@wemm.org>
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On Fri, Sep 17, 2004 at 09:07:18AM -0700, Peter Wemm wrote: > On Tuesday 14 September 2004 11:35 pm, Francois Tigeot wrote: > > On Tue, Sep 14, 2004 at 03:43:13PM -0700, Peter Wemm wrote: > > > On Tuesday 14 September 2004 08:04 am, Francois Tigeot wrote: > > > > I'm running 5.3-BETA4 and I can't find <machine/pc/bios.h> even > > > > though bios(9) exists. > > > > > > We dont even have bios_sigsearch() - all the consumers in the > > > kernel were related to vm86()/bios16()/bios32() calls, which are > > > impossible in our kernel. > > > > This puzzles me, as the functions seem to be present on alpha. > > No, they are not.. The prototypes are there due to over-merging and > lack of cleanup, but there are no implementations for the functions. My bad, I did a quick grep in /usr/src. > > > What do you need it for? It might be ok to revive a subset of it, > > > but it would be useful to know what that file is being used for > > > first, so we know which subsets are needed. > > > > I am experimenting with Bruno Ducrot's powernow_k7 and need to read > > some tables in BIOS memory area. > > Ahh - bios tables. That we can do. This is for a kernel component, > right? Right. The table is providing CPU frequency and voltage information corresponding to different power states. A kernel module could use it to scale system speed according to the average load... At least, it seems this is what this code does on i386: http://www.poupinou.org/cpufreq/bsd/powernow_k7/ -- Francois Tigeot
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