FreeBSD on T5220

[Mark Linimon]

On Sun, Aug 09, 2015 at 07:25:46AM +1000, Peter Jeremy wrote:
> Support was removed from head in r221870, so if you do a checkout of
> head at r221869, you should find everything.

Well, it was actually disconnected by the 221869 commit, before being
removed via 221870.  Both were on 20150514.  So you need to go back
before 221869.

I just put some notes into the wiki page:

  https://wiki.freebsd.org/FreeBSD/sun4v

Personally I would start with 221124 which involved the last previous
commit to GENERIC on 20110427:

  https://svnweb.freebsd.org/base/head/sys/sun4v/conf/GENERIC?r1=220982&r2=221124&pathrev=221124

It's not that much farther back, and maybe one could speculate that
that change had been build-tested.  Perhaps not, but from there you
could start walking back through the changes in sys/sun4v to find
the last buildable point.

Having looked at this, I now think it's a harder problem than I first
suspected.  It would be fun to work on, though.

mcl