From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: "René Rebe" <rene@exactcode.de>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: Using video memory on PS3 e.g. as SWAP?
Date: Mon, 30 Jul 2007 09:34:24 +1000 [thread overview]
Message-ID: <1185752064.5495.375.camel@localhost.localdomain> (raw)
In-Reply-To: <200707291904.55700.rene@exactcode.de>
On Sun, 2007-07-29 at 19:04 +0200, René Rebe wrote:
> Hi all,
>
> looking at the PS3 as one of the few PowerPC workstation options the RAM
> is obviously quite limitted with just 256MB. I wonder if the 256MB of
> video memory can be mapped or at least be used as super-fast SWAP?
>
> Or are there news regarding accessing the video chip from Linux beside
> the unaccelerated frame-buffer?
I can be mapped, and accessed directly with MMIO. Some folks did a
driver for that, not sure where about. It's fairly slow though. The
problem is that MMIO accesses to VRAM aren't fast. DMAs are supposed to
be but then, we don't have access to those.
Cheers,
Ben
next prev parent reply other threads:[~2007-07-29 23:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-29 17:04 Using video memory on PS3 e.g. as SWAP? René Rebe
2007-07-29 23:34 ` Benjamin Herrenschmidt [this message]
2007-07-30 12:24 ` Marc Dietrich
2007-07-31 20:14 ` Geoff Levand
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