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Date: Wed, 10 Mar 2010 17:42:14 -0800
From: Andrew Sharp <andy.sharp@lsi.com>
To: "Kingsbury, Brent" <Brent.Kingsbury@lsi.com>
Subject: Re: Mips processor revision in Cougar
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On Wed, 10 Mar 2010 17:37:34 -0700 "Kingsbury, Brent"
<Brent.Kingsbury@lsi.com> wrote:

> Thanks, Andy.  That fills a lot of blanks in.
> 
> --BK
> 
> P.S.  So you were a young'in back in 2002.  Gosh golly, I was a
> 	youngster when the first primordial slime oozed upon
> 	the still cooling basalt.  And I was in my dotage years
> 	when the 6-mile wide asteroid that scoured the non-avian
> 	dinosaur evolutionary niche clean, poured its energies
> 	into earth's crust just off the Yucatan at the end of the
> 	Cretaceous....  But I digress. :-)

Well, no, I was a youngster back when the MIPS4/MIPS64 thing happened,
which I think was even before the 90's.

> -----Original Message-----
> From: Andrew Sharp [mailto:andy.sharp@lsi.com] 
> Sent: Wednesday, March 10, 2010 4:21 PM
> To: Kingsbury, Brent
> Subject: Re: Mips processor revision in Cougar
> 
> On Wed, 10 Mar 2010 16:51:13 -0700 "Kingsbury, Brent"
> <Brent.Kingsbury@lsi.com> wrote:
> 
> > Hi Andy,
> > 
> > Dave Olien and I were briefly chatting up here about a particular
> > TuxStor issue he's working on, and we wanted to verify that the data
> > caches in the MIPS processors are physically tagged (not virtually
> > tagged).
> 
> Not virtually tagged ~:^)
> 
> > Dave found some old documentation (I think he found it just by web
> > browsing), that says that the caches are physically tagged, but that
> > document was dated back to 2002.  But I am left wondering, what MIPS
> > processor revision are we using?  And can we find the manuals for it
> > online somewhere?  (I've even tried looking at the photos from
> > cougar bring-up, but the processors are buried under heat sinks
> > concealing their secret identity).
> 
> 2002 is quite recent for MIPS.  Most of these "modern" MIPS variants
> are based on the MIPS-IV/MIPS-64 spec that was eons ago.  In other
> words, back when I was a youngster.
> 
> We are using two Sibyte processors, the 1125 and 1480, currently, in
> Cougars.  You can find the manuals in PDF form in
> 
> /n/hardware/Cougar/specs/blah-de-blah
> 
> password is docs2020
> 
> Let me know if you can't find them, I'll dig them up and email 'em to
> ya.  If you really want an education, _See MIPS Run Linux_ is an
> astounding book.  Simply a Bible.  It's the only one I've ever had to
> use.  Nothing left out, lot's of Linux specifics, tons of historical
> info, it's truely amazing.
