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From: Alex Kozlov <spam@rm-rf.kiev.ua>
To: Jeremy Messenger <mezz7@cox.net>, Xin LI <delphij@freebsd.org>,
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Subject: Re: svn commit: r205307 - head/sys/i386/conf
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On Thu, Mar 18, 2010 at 08:13:46PM -0600, Jeremy Messenger wrote:
> On Thu, 18 Mar 2010 19:16:53 -0600, Xin LI <delphij@freebsd.org> wrote:
> 
> > Author: delphij
> > Date: Fri Mar 19 01:16:53 2010
> > New Revision: 205307
> > URL: http://svn.freebsd.org/changeset/base/205307
> >
> > Log:
> >   SSE is enabled by default about 5 years ago so there is no point  
> > pretending
> >   that we support I486 and I586 CPUs in the GENERIC kernel, users wants  
> > these
> >   support would have to build a custom kernel to explicitly disable SSE
> >   anyways.
> >  MFC after:	1 month
> 
> Geode is i586, right? Or not matter, it still can be using i686? Soekris,  
> a few small motherboards and other thin clients are still using Geode.
All magic happens in initializecpu(sys/i386/i386/initcpu.c)
If geode reports himself as i586 then sse won't be enabled. Although
some bioses allow it at startup.

As a side note, I'm realy not sure that contemporary kernel can boot
on IBM Blue Lightning or Cyrix 486SLC or even Cyrix 5x86, can anyone test it?


--
Adios