[PATCH] AMD64 On-CPU GART support + more

[Willem Jan Withagen]

I have a dual opteron MSI  K8T Master2-FAR board.....
It contains the K8T800 so I could test things....
But what is this actually for??? And what do I gain??

--WjW

----- Original Message ----- 
From: "Jung-uk Kim" <jkim at niksun.com>
To: <freebsd-amd64 at freebsd.org>
Cc: <freebsd-x11 at freebsd.org>; <eta at lclark.edu>
Sent: Monday, June 14, 2004 11:21 PM
Subject: Re: [PATCH] AMD64 On-CPU GART support + more


> On Monday 14 June 2004 04:46 pm, Jung-uk Kim wrote:
> > Since the latest DRM is imported, I made my AMD64 on-CPU GART[1]
> > working (patch attached).  This driver has some ugliness because of
> > its nature: driver is for AGP bridge but directly touches north
> > bridge registers (of multiple north bridges if you have multiple
> > CPUs).  Ideally we can attach child driver here for each bridge but
> > it is just a part of its functions so that I didn't want to create
> > a full-blown driver.  The second ugliness comes from the agp_sis.c
> > and agp_via.c.  They fall back to 'generic host to PCI bridge' if
> > it is not supported but it finds a bridge.  I believe this has to
> > be removed.  The kludge is 'AGP_AMD64_GART' in kernel
> > configuration. This kludge can be removed when the 'fallback'
> > match/probe is removed.  For now, 'AGP_AMD64_GART' is required to
> > test this driver. If anyone is interested, please cleanup/fix them.
> > :-(
>
> Oops, agp_via.c has a bad merge.  Sorry.
>
> Jung-uk Kim
>
> > It's tested with Via K8T800 (both FreeBSD/i386 and FreeBSD/amd64)
> > but it should work with other bridges/tunnels.  XFree86 snapshot
> > (after Mesa 6.1 import) + DRI snapshot worked fine with MGA 400 and
> > Radeon RV280 in FreeBSD/i386.  In FreeBSD/amd64, MGA 400 works but
> > Radeon RV280 doesn't work but I believe it's DRM/DRI's problem, i.
> > e., Radeon SAREA handles.
> >
> > Cheers,
> >
> > Jung-uk Kim
> >
> > [1] BIOS and Kernel Developer's Guide for AMD Athlon? 64 and AMD
> > Opteron(tm) Processors (3.6.12-15)
> > http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_
> >docs/26094.PDF
> >
> > * PS: I think the current agp_via.c doesn't support K8T800 or other
> > AGP v3 bridges correctly.  If anyone is interested, let me know.
> > ;-)
>


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