From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 6 Jan 2004 08:14:12 +0100 To: Marcus Barrow Cc: Sven Luther , linuxppc-dev@lists.linuxppc.org Subject: Re: multiple separate pci bridges ... Message-ID: <20040106071412.GB735@iliana> References: <20040101181145.GA27294@iliana> <1073016223.1502.179.camel@gaston> <20040102074049.GA2032@iliana> <1073029796.1501.228.camel@gaston> <20040104210335.GA858@iliana> <1073252724.780.5.camel@gaston> <20040104220608.GA1667@iliana> <20040105164038.GA16158@iliana> <1073338730.9456.2487.camel@boat.sangate.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 In-Reply-To: <1073338730.9456.2487.camel@boat.sangate.com> From: Sven Luther Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: On Mon, Jan 05, 2004 at 04:38:50PM -0500, Marcus Barrow wrote: > > Hi Sven: > > I think there is some basic brokeness in the Discovery > specific code. I've been meaning to go and look at some > of the original code, to see if some stuff was left on > the floor. Mmm. What code are you speaking about here ? > On our evalution boards the P2P registers are not set > up. So you indeed have two PCI bus 0. The P2P register > for PCI bus 1 should be initialized to identify it as > bus 1, or whatever the right value is considering > any more bridges found on bus 0. Mmm, i understand that the 2.6.x pci domain will make this not necessary. I might be wrong though. > If you insert pci cards which contain bridges on them, > they only work on the bus 0 slots... bus 1 is used as an agp bus anyway, and i doubt there are many agp graphic cards out there with pci bridges on them. When i inserted my Appian Jeronimo 2000 in that board, it refused to powerup at all, but then, maybe it is drawing too much power or something. After all, it has a 3dlabs gamma and two permedia3 on it. > Do you have something like ppcboot or uboot starting > your system or just a kernel? If you are using a real Well, there is a customized SmartFirmware OpenFirmware on the board. I even have (non-free though) access to the source of it. The board is mostly a CHRP design. > boot rom, you could try initializing the p2p registers > by hand, then booting... The Firmware guy told me don't touch it though. > I'm hoping to work on this in the next few days. Ok, great. Friendly, Sven Luther ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/