From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <366ED369.C34A8FE5@talknet.de> Date: Wed, 09 Dec 1998 19:45:45 +0000 From: Alois Fertl MIME-Version: 1.0 To: Cort Dougan CC: Matt Porter , "linuxppc-dev@lists.linuxppc.org" , VALETTE Eric Subject: Re: Linux-2.1.129 boot on MCP750 References: Content-Type: text/plain; charset=us-ascii Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: Yes its possible to change the locations where ppcbug loads via the net via the "niot" command. To my experience this address is only used if the "network prep mode" is switched off. If you switch this off the ppcbug does no longer prepare residual data (use "nbh" and you will see that R3 is zero). No residual data means that the raven is not detected and the code uses direct access to scan for PCI devices. As this will not work on the raven and you end up with no PCI at all. I do not know however which kernel version introduced this method of detecting the raven via the residual data. If I remember correctly it was possible to boot at least 2.0.32 with network prep mode switched off. > > You can change the address that ppcbug loads the image to. I pointed mine > at the end of memory to keep it out of the way. The boot code for prep is > very delicate right now due to the many many addresses that boards load > the image at so anything that can make it easier (such as moving the > address the kernel is loaded at) I want to take advantage of. > > }> There is a problem in boot/misc.c which manifests only > }> if netboot is used. Current ppcbug netboots at 0x5000 and > }> this forces decompress to overwrite its own source. > } > }Can you elaborate on which versions of ppcbug this is a problem with and > }in what cases? I have been booting the kernel on MVME23/26/27/36xx and an > }MCP750 without seeing this problem...maybe cause my MCP750 has an older > }rev of ppcbug. [[ This message was sent via the linuxppc-dev mailing list. Replies are ]] [[ not forced back to the list, so be sure to Cc linuxppc-dev if your ]] [[ reply is of general interest. To unsubscribe from linuxppc-dev, send ]] [[ the message 'unsubscribe' to linuxppc-dev-request@lists.linuxppc.org ]]