From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Becky Bruce <Becky.Bruce@freescale.com>
Cc: Olof Johansson <olof@lixom.net>,
linuxppc-dev list <linuxppc-dev@ozlabs.org>,
Michael Schmitz <schmitz@zirkon.biophys.uni-duesseldorf.de>,
debian-powerpc@lists.debian.org,
Paul Mackerras <paulus@samba.org>
Subject: Re: 7447A strange problem with MSR:POW (WAS: can't boot 2.6.17-rc1)
Date: Sat, 15 Apr 2006 08:57:31 +1000 [thread overview]
Message-ID: <1145055451.4223.40.camel@localhost.localdomain> (raw)
In-Reply-To: <BBE6C9EA-53B5-4EAA-A766-DAF241E7040D@freescale.com>
On Fri, 2006-04-14 at 15:00 -0500, Becky Bruce wrote:
> He's being sneaky - there's a copy of HID0 in the CR at this point
> from the caller, and bit 9 is the position for NAP.
It's a trick I learned from Darwin :) They do that regulary when code is
very cpu-feature dependant, like cache code for example, they put the
cpu features bitmask in CR and do branches based on individual bits of
it here or there.
Ben.
next prev parent reply other threads:[~2006-04-14 22:57 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.44.0604071010290.18017-100000@zirkon.biophys.uni-duesseldorf.de>
[not found] ` <1144408805.30891.42.camel@localhost.localdomain>
[not found] ` <17463.9759.442768.685153@cargo.ozlabs.ibm.com>
2006-04-13 10:20 ` 7447A strange problem with MSR:POW (WAS: can't boot 2.6.17-rc1) Benjamin Herrenschmidt
2006-04-13 20:46 ` Becky Bruce
2006-04-13 20:55 ` Benjamin Herrenschmidt
2006-04-13 21:46 ` Becky Bruce
2006-04-13 22:37 ` Benjamin Herrenschmidt
2006-04-13 22:44 ` Olof Johansson
2006-04-14 19:07 ` Paul Mackerras
2006-04-14 19:54 ` Olof Johansson
2006-04-14 20:00 ` Becky Bruce
2006-04-14 22:57 ` Benjamin Herrenschmidt [this message]
2006-04-14 20:19 ` Paul Mackerras
2006-04-14 20:24 ` Olof Johansson
2006-04-14 21:09 ` Becky Bruce
2006-04-14 21:01 ` Benjamin Herrenschmidt
2006-04-18 5:45 ` Paul Mackerras
2006-04-18 6:00 ` Benjamin Herrenschmidt
2006-04-18 6:32 ` Paul Mackerras
2006-04-18 6:37 ` Benjamin Herrenschmidt
2006-04-18 14:56 ` Olof Johansson
2006-04-18 16:03 ` Olof Johansson
2006-04-15 11:12 ` Michael Schmitz
2006-04-18 19:29 Becky Bruce
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