From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from web53501.mail.yahoo.com (web53501.mail.yahoo.com [206.190.37.62]) by ozlabs.org (Postfix) with SMTP id A3C132BEA0 for ; Sun, 28 Nov 2004 08:39:46 +1100 (EST) Message-ID: <20041127213940.72317.qmail@web53501.mail.yahoo.com> Date: Sat, 27 Nov 2004 13:39:40 -0800 (PST) From: roger blofeld To: tnt@246tNt.com In-Reply-To: <20041116201654.GA3088@xyzzy> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linuxppc-embedded@ozlabs.org Subject: Re: MPC5200 Cache coherency with BestComm issue List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sylvain, By experimenting I have found that the BestComm and FEC work without the cache flush provided CPU_FTR_MAYBE_CAN_NAP is removed from the cputable (nap disables snooping) and that CPU_FTR_NEED_COHERENT is added to the cputable (turns on "M" bit in BAT/PTE so that the XLB has a chance of seeing a global transaction). I don't know if that will work for all G2_LE cores, but it seems required for the 5200. -rb __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com