On Wed, 7 Oct 2009, David Miller wrote:
From: Chris Newport <crn@xxxxxxxxxxx>
Date: Thu, 8 Oct 2009 02:29:25 +0100 (BST)
Sun4d has never had SMP support and
Wrong.
this is apparantly problematic due to Cray interlectual property
causing a lack of bus documentation.
XBUS documentation is not available, but we fully know how to
program the SBUS interrupt controller and whatnot. It's all
there in the sun4d interrupt and SMP support and it did work
just fine at one point.
Amusingly the SBUS interrupt stuff on sun4d is a very close
sibling to the IMAP/ICLR scheme used on sun4u.
The Sun4d SMP support exists, but is broken in 2.6.
And the UP support is buggy. At least on my test-setup, the
kernel is unable to load userland from scsi-drives.
Dropping the sun4 32-bit SPARC is a bit counterproductive when
considering the resent effort to unify sparc64 and sparc
arch-branches ?
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