From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1HhaG3-0004Rk-8F for qemu-devel@nongnu.org; Fri, 27 Apr 2007 19:53:47 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1HhaG1-0004RY-O2 for qemu-devel@nongnu.org; Fri, 27 Apr 2007 19:53:46 -0400 Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1HhaG1-0004RV-Li for qemu-devel@nongnu.org; Fri, 27 Apr 2007 19:53:45 -0400 Received: from mail.codesourcery.com ([65.74.133.4]) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1HhaA7-00033K-B2 for qemu-devel@nongnu.org; Fri, 27 Apr 2007 19:47:39 -0400 From: Paul Brook Subject: Re: [Qemu-devel] ARM Big endian system emulation Date: Sat, 28 Apr 2007 00:47:34 +0100 References: <200704270307.50211.alexis.berlemont@free.fr> <200704270222.45308.paul@codesourcery.com> <200704280123.36200.alexis.berlemont@free.fr> In-Reply-To: <200704280123.36200.alexis.berlemont@free.fr> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200704280047.35765.paul@codesourcery.com> Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Alexis Berlemont > > In theory most of the bits should be there. However I don't have > > big-endian hardware to test against, > > I had a look at the "integrator cp" user guide. This board and the related > core modules are supposed to be able to work in big endian mode (even if > some components are not compatible like the Ethernet controller). Sort-of. The Integrator boards aren't really big-endian, they're a little endian board with a CPU that can switch endianness. > Do you know some other big-endian platform ? There are many big-endian platforms. > I do not understand one more issue: I do not guess how a real big-endian > board can be useful. Is it for checking whether the Linux kernel is working > in such a configuration ? I have very little confidence in linux actually working in big-endian mode on an integrator. I'd also expect some of the consequences to switching to big-endian mode to be non-obvious. Access to real hadware allows you to check whether you're hitting kernel bugs or qemu bugs. Paul