svn commit: r208152 - in head/sys: dev/ofw powerpc/aim powerpc/ofw

[Marius Strobl]

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