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 4822ADDDDB for ; Sun, 2 Nov 2008 08:55:25 +1100 (EST) Subject: Re: [PATCH 1/2] powerpc: add 16K/64K pages support for the 44x PPC32 architectures. From: Benjamin Herrenschmidt To: Josh Boyer In-Reply-To: <20081101113018.GA13646@zod.rchland.ibm.com> References: <1224123753-20907-1-git-send-email-yanok@emcraft.com> <1224123753-20907-2-git-send-email-yanok@emcraft.com> <48FF3889.2030304@linux.vnet.ibm.com> <20081101113018.GA13646@zod.rchland.ibm.com> Content-Type: text/plain Date: Sun, 02 Nov 2008 08:55:02 +1100 Message-Id: <1225576502.8004.222.camel@pasglop> Mime-Version: 1.0 Cc: Wolfgang Denk , Ilya Yanok , Hollis Blanchard , linuxppc-dev@ozlabs.org, pvr@emcraft.com, dzu@denx.de, Hollis Blanchard Reply-To: benh@kernel.crashing.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Sat, 2008-11-01 at 07:30 -0400, Josh Boyer wrote: > > That is on purpose. The chip has an errata that causes badness if > you use the last XX bytes of DRAM. I forget exactly what XX is, but > we just remove the last page. Doing that from the device-tree is very hairy tho... you end up with informations in there that aren't aligned etc... oh well. Ben.