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 ESMTP id 4F490DDDFC for ; Thu, 4 Oct 2007 08:48:34 +1000 (EST) In-Reply-To: References: <20071003190140.GA19169@xyzzy.farnsworth.org> <0B763FCF-9EFD-48E5-B2D9-53EAB0396522@kernel.crashing.org> Mime-Version: 1.0 (Apple Message framework v752.2) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: <20D3652D-CBD1-439D-BD4A-6D650F65BAEE@kernel.crashing.org> From: Kumar Gala Subject: Re: [PATCH] PPC 85xx failure with odd memory sizes and CONFIG_HIGHMEM Date: Wed, 3 Oct 2007 17:48:18 -0500 To: "Rune Torgersen" Cc: linuxppc-embedded@ozlabs.org List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Oct 3, 2007, at 4:45 PM, Rune Torgersen wrote: >> From: Kumar Gala >> The code would have to change to allow for 1G of lowmem. >> Max lowmem with KERNELBASE @ 0xc000_0000 is 768M. > > Which is why I asked. On 82xx it is supported without a codechange by > setting KERNELBASE to 0xa000_0000 in Kconfig menu (and also changing > start of virtual mem, also done by config option). we could make this work. Its just no one's griped about needing it to date. Its a bit of testing to make sure we respect the kernel config changes and a slight be of code to handle using up to 1G TLB sizes on e500v2 or greater. - k