From: Kenneth Johansson <kenneth@southpole.se>
To: Li Tao-B22598 <B22598@freescale.com>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: Question about e300 core decrementer interrupt
Date: Wed, 09 Sep 2009 13:16:07 +0200 [thread overview]
Message-ID: <1252494967.10293.6.camel@localhost> (raw)
In-Reply-To: <FF7429C6AD6EFB489C0A5A2021CDFEFA7C30E6@zmy16exm21.fsl.freescale.net>
On Tue, 2009-09-08 at 13:48 +0800, Li Tao-B22598 wrote:
> Dear all,
>
> I have a problem in MPC5121 sleep mode. As you know MPC5121 use e300c4
> core. When I make the e300c4 core into sleep mode, it will return to
> full power mode when the“decrementer interrupt” occurred.
>
> But in the e300 core reference manual said that the “decrementer
> interrupt”have no effect when e300 core in sleep mode, because the
> time
> base and decrementer are disabled while the core is in sleep mode.
> Can anybody explain about this procedure ?
Please talk to people internal to freescale. There is errata on this
that is known for a long time(more than a year now) that for some reason
is never entered into the errata document.
I'm a bit irritated that it's not as the "solution" can mean hardware
changes an thus it's potentially expensive.
next prev parent reply other threads:[~2009-09-09 11:16 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-08 5:48 Question about e300 core decrementer interrupt Li Tao-B22598
2009-09-09 11:16 ` Kenneth Johansson [this message]
2009-09-09 18:43 ` Scott Wood
2009-09-10 9:09 ` Kenneth Johansson
2009-09-10 11:53 ` Li Tao
2009-09-10 11:58 ` Li Tao
2009-09-10 15:30 ` Scott Wood
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