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Date: Wed, 21 Oct 2015 11:07:31 +0000
From: Alexey Dokuchaev <danfe@FreeBSD.org>
To: Jukka Ukkonen <jau789@gmail.com>
Cc: Tilman Keskin?z <arved@FreeBSD.org>, freebsd-ppc@FreeBSD.org
Subject: Re: radeon/powerpc32 and xorg-server 1.17
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[ Fixed quoting; please don't top post. ]

On Wed, Oct 21, 2015 at 01:49:42PM +0300, Jukka Ukkonen wrote:
> > On 21 Oct 2015, at 13:03, Alexey Dokuchaev <danfe@FreeBSD.org> wrote:
> > I recall that Justin had some progress [1] here, but apparently it was
> > not commit-ready so it never hit the tree.
> > 
> > [1] https://lists.freebsd.org/pipermail/freebsd-ppc/2015-August/007728.html
> 
> If my memory serves me, radeon kms driver needs 64 bit atomic
> operations which are not available on 32 bit ppc.

Right; if you'd follow quoted link Justin talks about exactly that.  I
actually also need 64-bit atomics (for a different project) and did some
initial research as well [2], but haven't sat down for a longer time to
actually come up with some implementation.

./danfe

[2] https://lists.freebsd.org/pipermail/freebsd-ppc/2015-September/007774.html