On Mon, Jan 03, 2005 at 04:50:00PM -0000, Leigh Brown wrote: > Ulrich Teichert said: > > This seems to result in a different setting and the kernel is not able > > to figure out that it is running on a serial console. According to Leigh > > Browns, it is not possible to give the kernel parameters on boot-up, > > unless you are using his patches, so this may be another issue. > > I have a patch you can use to specify parameters on the *command line* > (e.g. boot floppy: root=/dev/sda3 ...). However, you can always type > parameters on the serial console as it boots (see below).
Mmm, is this one already present in the debian 2.6.8 kernel packages ? If not we would probably want to include it. I am currently preparing a bunch of prep patches, so it is a good idea to include this one too. How is it related to the below command line prompt thingy ... > > But this is how far the default kernel (which is all I can load from CD) > > boots: > > > > 0 > setenv load-base 1000000 ok > > 0 > setenv real-base c00000 ok > > 0 > boot cdrom: > > > > loaded at: 01000400 01492FF4 > > relocated to: 00800000 00C92BF4 > > zimage at: 0080A94C 0093E3DC > > initrd at: 0093F000 00C884AE > > avail ram: 00400000 00800000 > > > > Linux/PPC load: console=ttyS0,9600 console=tty0 ... This one i mean. > *** This is the point you get 5 seconds to start editing the parameters. > I guess if you specify root=/dev/ram0 or something then it will boot > from the ramdisk, rather than trying to boot from /dev/sda3. d-i is perfectly happy to just boot without any argument. > > Uncompressing Linux...done. > > Now booting the kernel > > Total memory = 256MB; using 512kB for hash table (at c0300000) > > Linux version 2.6.8-powerpc ([EMAIL PROTECTED]) (version gcc 3.3.5 (Debian > > 1:3.3.5-2)) #1 Thu Dec 9 10:27:54 CET 2004 > > PReP architecture > [...] > > VFS: Cannot open root device "<NULL>" or unknown-block(8,3) > > Please append a correct "root=" boot option > > Kernel panic: VFS: Unable to mount root fs on unknown-block(8,3) > > <0>Rebooting in 180 seconds.. > > Other than that, it's a nice clean boot. Indeed. > > [del] > >>> Then i suppose that copying the kernel is just a matter of : > >>> > >>> dd if=/boot/vmlinuz-2.6.8-powerpc of=/dev/sdb1 > >>> > >>> but you have to have a small prep partition as /dev/sdb1, or the above > >>> will > >>> erase whatever you have on /dev/sdb1. > > > > This is not enough. You need to set the kernel arguments with Leigh's > > preptool (which is a simple perl script), because of the problems > > mentioned before. > > Well, you need to have my patch for that. There are other ways to > manually change the boot arguments (like hexedit etc). Could you post it ? Anything else you are aware that we should add in our 2.6.8 powerpc kernels which is PReP related ? Friendly, Sven Luther
