From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Wed, 13 Feb 2013 15:23:35 +0100 (CET) Received: from qmta09.westchester.pa.mail.comcast.net ([76.96.62.96]:60189 "EHLO qmta09.westchester.pa.mail.comcast.net" rhost-flags-OK-OK-OK-OK) by eddie.linux-mips.org with ESMTP id S6816607Ab3BJDytx6MYe (ORCPT ); Sun, 10 Feb 2013 04:54:49 +0100 Received: from omta20.westchester.pa.mail.comcast.net ([76.96.62.71]) by qmta09.westchester.pa.mail.comcast.net with comcast id yTgb1k0031YDfWL59TujZv; Sun, 10 Feb 2013 03:54:43 +0000 Received: from [192.168.1.13] ([69.251.154.25]) by omta20.westchester.pa.mail.comcast.net with comcast id yTuh1k00F0Z8pnp3gTuigU; Sun, 10 Feb 2013 03:54:42 +0000 Message-ID: <51171A08.20302@gentoo.org> Date: Sat, 09 Feb 2013 22:54:48 -0500 From: Joshua Kinard User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130107 Thunderbird/17.0.2 MIME-Version: 1.0 To: linux-mips@linux-mips.org Subject: Re: prom start References: <20130206160508.GR2118@belle.intranet.vanheusden.com> In-Reply-To: <20130206160508.GR2118@belle.intranet.vanheusden.com> X-Enigmail-Version: 1.5 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="----enig2PGLTWBNJCWMINDHNICSC" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20121106; t=1360468483; bh=mwMbqKzT8reVObD521VYpEapjt4P6oXsuuKLVsTyiTs=; h=Received:Received:Message-ID:Date:From:MIME-Version:To:Subject: Content-Type; b=A6Pnef17wXtTz0SdqtHPNOKbeJBDoA680cghQQi3DSeCkLKYN+d8idZkzydIvGNku Yc5gYzGboMTwHLqk944x7AmKZjOWaBYYbcXXuT3wcHOguJH+zmyMxmcT8HffI47oIR Y0uNH6Yl70I3au+aU2+4QFfTqOdaxIAATTpoE0hzooP4AvUlu+5L0WJOu4uf+zO/G+ It+dAaKIfI63w3yEodpOPL2OXk0WmUdJ+Mjrcav6zGQ6wwRW/GiTGZ3PGkXslUJjz+ rL6HdD9xD/uRHYdK4MluGs/JoXCLd0lAszsOgb6/26Ylt/HMMyTUYg0F5vyGvBr/+y 8hjokYCS5fXOQ== X-archive-position: 35739 X-Approved-By: ralf@linux-mips.org X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: kumba@gentoo.org Precedence: bulk List-help: List-unsubscribe: List-software: Ecartis version 1.0.0 List-Id: linux-mips X-List-ID: linux-mips List-subscribe: List-owner: List-post: List-archive: X-list: linux-mips Return-Path: This is an OpenPGP/MIME signed message (RFC 4880 and 3156) ------enig2PGLTWBNJCWMINDHNICSC Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 02/06/2013 11:05 AM, folkert wrote: > Hi, >=20 > Is this mailing list also meant for generic mips questions? (if not: an= y > suggestions for one that is?) >=20 > If so: I'mm experimenting a bit with mips, specifically on SGI hardware= > (Indigo). Now it seems all mips systems have the prom at 0xbfc00000. Bu= t > how does it start? The first 0x3c0 bytes seem to be nonsense. Somewhere= > on the web I found that 0xbfc00884 is the starting point but after > single stepping 5 instructions, the program counter jumps to 0x00000000= > so I don't think that's the right one either. Also, reading the first 4= > bytes from bfc00000 and using that as a pointer seems to be invalid too= : > 0bf000f0. > Anyone with insights regarding the booting of the prom on sgi systems? >=20 >=20 > Regards, >=20 > Folkert van Heusden The first Indigo? IP12? Or the Indigo2 series (IP22, IP26, or IP28)? ARCS (the SGI prom) is a bit of black magic and voodoo. It also terrifie= s the priests of Ancient Mu. You might want to hunt down copies of the PROM images for other SGI syste= ms, such as IP22, IP32 (O2), IP30 (Octane) (the latter two are on certain IRI= X media) and analyze those in a disassembler and see if you can discern something from there. You might also try gxemul and see if it can boot one of those proms (it's= a machine emulator like Qemu, but has some code tailored to SGI hardware in= it). Might give you some additional insight. Would be curious about your results if you can learn anything else from i= t via your own work. --=20 Joshua Kinard Gentoo/MIPS kumba@gentoo.org 4096R/D25D95E3 2011-03-28 "The past tempts us, the present confuses us, the future frightens us. A= nd our lives slip away, moment by moment, lost in that vast, terrible in-bet= ween." --Emperor Turhan, Centauri Republic ------enig2PGLTWBNJCWMINDHNICSC Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (MingW32) iQIcBAEBAgAGBQJRFxoPAAoJENsjoH7SXZXj6F8P/3DUdC+viQBkxZ0hR7Eoq269 g1WMRyRRsCVLbFSBThAiMoEPcFuZFdgn8KZMEgvMaCiUOCiMPCnSQL5MU7j4ffea 1eOyswMXjhsNXMq+WCOgQjrj/B0rT/a8qFNwSBbSUGY2I/a7Cmqpp3p8HnmIoIMa qdE3bbopb/Q0bTQ/DGQitqy8NiGIthbEu24af+wwOuu8DVhaoSlhSTAnljYJ3BgO /u4cgMmI060IjVg9CCzw4u68USBy68E7N3RO1eeoJuyxyBN11y4US4g8fxXHWDUb drHOGsfVR2bx26WMt4nlO2VHHbAX7pU46weR6bubet2Oal252o7pe5KzH/DrU94z Clqhs/A3/XgAq+8Vhbx2ab+Jv103MKeY2dgXpyfstg6fLpKdT/CUKWuPpRLOD9y+ hiKj89/Q7pkF2EETlJYpWM0TEtqI8USi4SMR6rgfmhQSDEEN199iHdPNoDIpTiG7 LA2py3YOHU3g2JmCIroelWZua1nL+Mw6QDHrFrlAsCebje5cdvEe8EAcyJOG2QOP yGTeuZSy2Eo/khSelYvgxDfUoyyun6m07OoOqpOLorDzbdO4A02YKg45WsDHC/wp 3H3iD4FfvxgAn9RjXxHBpRE4k6h0CTRjpZdmm12RSAKWYR2DNLOftq5TgI2ytTC3 k915PNZwKb0qgDmps7hB =q0OC -----END PGP SIGNATURE----- ------enig2PGLTWBNJCWMINDHNICSC--