From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.org (ozlabs.org [203.10.76.45]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mx.ozlabs.org", Issuer "CA Cert Signing Authority" (verified OK)) by bilbo.ozlabs.org (Postfix) with ESMTPS id 014BEB6F1E for ; Wed, 9 Sep 2009 21:16:22 +1000 (EST) Received: from mail.southpole.se (mail.southpole.se [193.12.106.18]) by ozlabs.org (Postfix) with ESMTP id C3910DDD04 for ; Wed, 9 Sep 2009 21:16:18 +1000 (EST) Subject: Re: Question about e300 core decrementer interrupt From: Kenneth Johansson To: Li Tao-B22598 In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Date: Wed, 09 Sep 2009 13:16:07 +0200 Message-Id: <1252494967.10293.6.camel@localhost> Mime-Version: 1.0 Cc: linuxppc-dev@ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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.