From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 4875C1007FA for ; Thu, 26 Nov 2009 15:37:03 +1100 (EST) Subject: Re: [RFC PATCH 03/19] powerpc: gamecube: bootwrapper bits From: Benjamin Herrenschmidt To: Segher Boessenkool In-Reply-To: References: <1258927311-4340-1-git-send-email-albert_herranz@yahoo.es> <1258927311-4340-2-git-send-email-albert_herranz@yahoo.es> <1258927311-4340-3-git-send-email-albert_herranz@yahoo.es> <1258927311-4340-4-git-send-email-albert_herranz@yahoo.es> <4B0C1A25.8030401@yahoo.es> Content-Type: text/plain; charset="UTF-8" Date: Thu, 26 Nov 2009 15:36:56 +1100 Message-ID: <1259210216.16367.249.camel@pasglop> Mime-Version: 1.0 Cc: Albert Herranz , linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Tue, 2009-11-24 at 22:00 +0100, Segher Boessenkool wrote: > > Sure, the memory controllers don't do coherency. I'm slightly worried > about two things: > 1) Will the generic code use M=0 as well? Is it a problem if it > doesn't? We can make it not do it. > 2) Do lwarx. etc. work in M=0? They should hopefully... as long as you don't rely on the reservation blowing as a result of a DMA write. Cheers, Ben