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Re: [PATCH] Impact video driver for SGI Indigo2

To: Joshua Kinard <>
Subject: Re: [PATCH] Impact video driver for SGI Indigo2
From: Ralf Baechle <>
Date: Wed, 14 Sep 2011 16:50:13 +0200
In-reply-to: <>
References: <Pine.LNX.4.64.1109111200400.4146@Indigo2.Peter> <>
User-agent: Mutt/1.5.21 (2010-09-15)
On Tue, Sep 13, 2011 at 08:43:39AM -0400, Joshua Kinard wrote:

> I don't think IP26 will ever live.  I think the old R8000 TLB code was
> removed a few years ago, too, so to get such systems to work, someone needs
> to actually have one (I do), resurrect the old code, add in the TLB pieces
> (the Manual is available, so this isn't beyond impossible now), and test it.
>  But at 75MHz, these machines aren't exactly speed demons, compared even to
> an R10K I2.

The R8000 code was removed because it was unfinished work in progress.  I
wrote it without having access to hardware at the time.  If somebody was
submitted the code for inclusion in that shape I'd have to reject and
consequently I removed the R8000 code again.

I think we have sufficient knowledge about the R8000 to get it to work.
And if necessary I know the folks who did the IRIX kernel work back in
the dark ages.


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