Date: Mon, 12 Jul 1999 23:24:53 -0400 (EDT) From: "Brian F. Feldman" <green@FreeBSD.org> To: Mike Smith <mike@smith.net.au> Cc: Stephen Hocking-Senior Programmer PGS Tensor Perth <shocking@prth.pgs.com>, current@FreeBSD.org Subject: Re: MTRR stuff Message-ID: <Pine.BSF.4.10.9907122323470.59533-100000@janus.syracuse.net> In-Reply-To: <199907122356.QAA02518@dingo.cdrom.com>
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On Mon, 12 Jul 1999, Mike Smith wrote:
> >
> > > What exactly are the ranges? You haven't given me enough info yet. I wrote the
> > > K6-* MTRR driver, so I'd like to help.
> > >
> > OK, the Linux 3dfx driver attempts to set up a write combining range starting
> > at the card's base address and 0x400000 bytes long. After doing this it then
> > sets up a range marked as uncacheable starting at the card's base address of
> > length 0x1000.
>
> The current i686 MTRR driver doesn't allow overlapping ranges at all;
> this is a defect in its implementation that will be rectified when I
> get to work on it next (hopefully in the next week or so).
The current K6 MTRR driver does, but I need more information on exactly
what's wrong. If it's returning EINVAL, what EXACTLY did he pass it?
Stephen, you're not giving enough information.
>
> --
> \\ The mind's the standard \\ Mike Smith
> \\ of the man. \\ msmith@freebsd.org
> \\ -- Joseph Merrick \\ msmith@cdrom.com
>
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