From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1Nk3DL-0005OT-3N for qemu-devel@nongnu.org; Tue, 23 Feb 2010 17:26:47 -0500 Received: from [199.232.76.173] (port=43052 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Nk3DK-0005NG-H0 for qemu-devel@nongnu.org; Tue, 23 Feb 2010 17:26:46 -0500 Received: from Debian-exim by monty-python.gnu.org with spam-scanned (Exim 4.60) (envelope-from ) id 1Nk3DI-0003jY-Qj for qemu-devel@nongnu.org; Tue, 23 Feb 2010 17:26:46 -0500 Received: from [71.162.243.5] (port=46030 helo=grelber.thyrsus.com) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1Nk3DI-0003W9-IB for qemu-devel@nongnu.org; Tue, 23 Feb 2010 17:26:44 -0500 Received: from landley.net (localhost [127.0.0.1]) by grelber.thyrsus.com (Postfix) with ESMTP id 4558C9F013E for ; Tue, 23 Feb 2010 17:24:35 -0500 (EST) From: Rob Landley Date: Tue, 23 Feb 2010 15:37:16 -0600 MIME-Version: 1.0 Content-Type: Text/Plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <201002231537.17014.rob@landley.net> Subject: [Qemu-devel] What is qemu-system-ppcemb for? List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org The qemu-system-ppcemb binary has the same -M and -cpu options as qemu-system- ppc. The default-configs/*.mak files are identical for ppc-softmmu.mak and ppcemb-softmmu.mak. The ppc-softmmu/config-target.mak matches the one in ppcemb-softmmu. The "config-target.mak" files differ, but just in the names. I looked at the source code and hw/ppc.c shows "Embedded PowerPC timers" for things like cpu_4xx_fit_cb(), but those seem to be used by the standard qemu- system-ppc... So far the only actual difference I've tracked down is that target-ppc/cpu.h is setting TARGET_PAGE_BITS to 10 (for 1k pages) instead of 12 (4k pages)... except it's not doing that for CONFIG_USER_ONLY...? (For KVM, it's assuming a ppc4xx CPU by default, but I'm not using kvm.) I tried booting my ppc image with qemu-system-ppcemb instead and it hung, so something's different. Presumably that page size thing... Has anybody actually used ppcemb for anything? Is there a Linux config or it? I've been building a powerpc4xx system image, but booting it under g3beige because last I checked qemu doesn't emulate a 4xx processor? (It has a bamboo board, but only lets you use it under kvm...) Confused, Rob -- Latency is more important than throughput. It's that simple. - Linus Torvalds