Date: Sun, 16 May 2010 23:38:22 +0200 From: Marius Strobl <marius@alchemy.franken.de> To: Nathan Whitehorn <nwhitehorn@freebsd.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r208152 - in head/sys: dev/ofw powerpc/aim powerpc/ofw Message-ID: <20100516213822.GA49967@alchemy.franken.de> In-Reply-To: <201005161557.o4GFv0Lf046659@svn.freebsd.org> References: <201005161557.o4GFv0Lf046659@svn.freebsd.org>
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On Sun, May 16, 2010 at 03:57:00PM +0000, Nathan Whitehorn wrote: > Author: nwhitehorn > Date: Sun May 16 15:56:59 2010 > New Revision: 208152 > URL: http://svn.freebsd.org/changeset/base/208152 > > Log: > On PowerMac11,2 and (presumably) PowerMac12,1, we need to quiesce the > firmware in order to take over control of the SMU. Without doing this, > the firmware background process doing fan control will run amok as we > take over the system and crash the management chip. > > This is limited to these two machines because our kernel is heavily > dependent on firmware accesses, and so quiescing firmware can cause > nasty problems. > Given that the "quiesce" service isn't part of the Open Firmware standard nor of one of its supplements as far as I can see and given this service isn't available on sun4u I'd prefer this implementation to be entirely moved to MD parts instead (similar to the "SUNW,<foo>" services which we keep MD). Marius
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