From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=45465 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PX1UP-0002Vv-MZ for qemu-devel@nongnu.org; Sun, 26 Dec 2010 20:03:06 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PX1UO-0005w2-9s for qemu-devel@nongnu.org; Sun, 26 Dec 2010 20:03:05 -0500 Received: from mail-gw0-f45.google.com ([74.125.83.45]:42903) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PX1UO-0005vy-0z for qemu-devel@nongnu.org; Sun, 26 Dec 2010 20:03:04 -0500 Received: by gwj23 with SMTP id 23so4746403gwj.4 for ; Sun, 26 Dec 2010 17:03:03 -0800 (PST) From: Rob Landley Date: Sun, 26 Dec 2010 19:03:02 -0600 References: <1292287758-8009-1-git-send-email-andreas.faerber@web.de> <5A66618B-CFD1-4B9B-A4AF-10168BD9D86C@web.de> In-Reply-To: MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Message-Id: <201012261903.02749.rob@landley.net> Subject: [Qemu-devel] Re: [PATCH 0/4] ppc: Fix PReP emulation List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Alexander Graf Cc: Andreas =?iso-8859-1?q?F=E4rber?= , =?iso-8859-1?q?Herv=E9_Poussineau?= , QEMU Developers On Sunday 19 December 2010 09:34:24 Alexander Graf wrote: > On 19.12.2010, at 16:04, Andreas F=E4rber wrote: > > Am 19.12.2010 um 10:54 schrieb Alexander Graf: > >> On 14.12.2010, at 01:49, Andreas F=E4rber wrote: > >>> Hello, > >>> > >>> Based on an earlier attempt of mine to make OpenBIOS work with -M pre= p, > >>> with kind support from Herv=E9 Poussineau here's an initial stab at > >>> fixing the long-broken PReP emulation and preparing migration from > >>> abandoned OpenHack'Ware to OpenBIOS as default FOSS firmware. > >>> > >>> In particular a number of hw_error()s are resolved, so that the BIOS > >>> can be entered at all. It is not yet working in terms of serial and > >>> VGA support etc. > >>> > >>> This series is also available from: > >>> > >>> git://repo.or.cz/qemu/afaerber.git prep-queue > >>> > >>> Some more work-in-progress for the curious is on my prep branch [2]. > >>> The corresponding work-in-progress OpenBIOS changes are at [3]. > >>> > >>> Unfortunately the prep machine is lacking documentation what exactly = it > >>> tries to emulate. The plan thus is to merge emulation of a second, re= al > >>> IBM 40p machine based on Herv=E9's work at [1], for use with original > >>> binary firmware. > >>> > >>> Also upcoming are new ppc_chrp machines, forked from ppc_newworld, > >>> emulating the 970-based IBM JS20 (using Apple U3) [4] and possibly the > >>> POWER5-based IntelliStation 285. These depend on the ongoing ppc64 po= rt > >>> of OpenBIOS to be completed though. This relates to PReP in that the > >>> machine IDs will need to be coordinated. > >> > >> Does this series actually make anything work, or is it just a first st= ep > >> set to get your development rolling? IOW, would users benefit from > >> having the patches upstream yet? > > > > As indicated above, it lets you enter a BIOS, which is a user-visible > > improvement. User-supplied binary firmware works with 1 + 3-4, ELF > > firmware with 1-4. Patch 3 depends on review comments. Patch 4 was just > > an FYI for testing the preceding patches and still needs investigation. > > > > For OpenBIOS to work, we need fw_cfg in ppc_prep.c and, independently, > > patches to OpenBIOS. Unless of course we want to use another firmware > > like OFW from the start. The main interest in PReP nowadays will be > > proprietary firmware anyway. I thought Rob (cc'ed) had PReP Linux kernel > > patches for QEMU at some point but I couldn't locate them in the > > Aboriginal Linux tree. > > I'm not sure on the copyright problems we might run into when delivering > binary firmware. So we certainly do need some open source firmware soluti= on > for prep to at least have Linux running. For other guests, I don't see a > reason why users shouldn't try to fetch a real firmware blob separately := ). Milton Miller wrote the ppc_bin in the last message from scratch, and made = it=20 available to me under GPLv2. The tarball is the source (which includes a=20 snapshot of dtc, which these days you can suck out of the linux kernel) and= =20 the .bin file is the output. I used my own powerpc toolchain (built by the= =20 build scripts in the same source tree) to compile it. Rob =2D-=20 GPLv3: as worthy a successor as The Phantom Menace, as timely as Duke Nukem= =20 =46orever, and as welcome as New Coke.