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Date: Sun, 09 Aug 2009 22:28:04 -0400
From: Robert Reif <reif@earthlink.net>
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Subject: Re: [Qemu-devel] sparc sun4m changes
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To: qemu-devel@nongnu.org
Cc: Blue Swirl <blauwirbel@gmail.com>

Robert Reif wrote:
> I just took a look at the sun4m interrupt controller and noticed
> the recent changes.  There are at least 3 different interrupt
> controllers used by sun4m: ss600mp with VME and MBUS
> specific support, ss 10/20 with MBUS support and ss 4/5/lx
> with slavio support.  This doesn't even address the java stations.
>
> intbit_to_level in slavio_intctrl.c needs to be different for each
> controller chip used.  There also needs to be a controller specific
> interrupt mask used.
>
> The NCR slavio chip is only used for single processor systems
> (ss 4/5/lx).  It is a subset of the ss 10/20 which is a subset of the
> ss600mp.  We really should address these differences.
>
I forgot to mention the ss 10/20 uses an STP 2014 SBus to EBus
Interface Controller.  I have a paper copy of the User's Guide.  I
can have it scanned to a pdf if necessary.

The ss600mp uses ASICs with no documentation other than
the sun4m System Architecture manual and SPARCsystem 600MP
VMEbus Implementation Guide on:
http://wikis.sun.com/display/FOSSdocs/Home.