On Fri, Oct 03, 2003 at 11:29:43AM +0200, Sven Luther wrote: > On Fri, Oct 03, 2003 at 09:12:56AM +0000, simon raven wrote: > > Le Wed, Oct 01, 2003 at 23:52:58 -0800, Ethan Benson a écrit: > > > On Thu, Oct 02, 2003 at 09:16:52AM +0200, Sven Luther wrote: > > > > > > > > > also .coff kernels don't even work until 2.4.23 (maybe). > > > > ask ben herrenschmidt about that actually. seems that they do work. > > Mmm, since you obviously care about oldworld pmacs, would you care of > sending us an overview of the different ways of booting on oldworld > pmacs, and where you get the kernels from for each of them. I gueesed > already the following : > > BootX : uses a macos (non-X) bootx program to boot the kernel, no idea > which kernel that is, where you get it from and if it supports an > initrd.
vmlinux at root of source tree. initrd is supported. > Quik : supports uncompressed kernels (the same as is used with yaboot) > and is used to boot oldworld systems from the harddisk. It seems that > the Performa 6360 does not work with Quik. check penguinppc.org/projects/quik/ > miboot: is also a macos (non-X) ROM based tool, can boot compressed > kernels from a floppy, but no idea which kernel this is, and what is > used for initrd. Is this the arch/ppc/boot/images/miboot.image ? vmlinux at root of source tree, initrd is only supported as a secondary floppy the same way as x86 rescue + root is done. > plain OF : uses the .coff kernel, and apparently only works over a > serial OF console. all oldworlds default to sending OF out the serial port, booting a coff kernel must be done manually at the OF console, which you can't see without a serial terminal by default. > And how do you think half of the open source contributors started ? Just > buy yourself a good C book, or use one of the numerous online tutorials, > and learn :))) that takes a great deal of time, longer then there is for d-i stuff. (but as i said eariler, d-i doesn't use C very much). > Well, there are actually various parts to the arch/subarch specific > stuff : > > --- Stage 0 --- > > 1) The initial booting, which uses the kernel-image udeb, but is not > really part of the debian-installer, as far as i can tell. it can't, initial booting proceedures vary wildly from arch to arch and to subarch to subarch. > --- Stage 1 --- > > 2) Initial hardware detection in stage 1, searches for the CDROM, or an > alternate way of loading in the udebs. > > 3) Anna loads in the udebs, and has support for per arch/subarch udebs > list. > > --- Stage 2 --- > > 4) The keyboard chooser will propose keyboards accordying to your > arch/subarch. > > 5) Second stage hardware detection. > > 6) Partitioning and preparation of the filesystems. what is used on powerpc? parted's ui is utterly horrible and complelty deficient for some requirements of powerpc (such as creating an 800K Apple_Bootstrap partition (i recommend that be done on both new and oldworld since yaboot2 is likly to prefer, or require one on oldworld, yaboot1 and 2 require one on newworld always, size must be exactly 800K)) > 7) boot-loader and kernel installation > > --- Stage 3 --- > > 8) We reboot and run the normal base-install stuff, everything > arch/subarch specific should have been solved here, and this is not the > job of the debian-installer anyway. really by the time you get here subarch stuff becomes mostly irrelevant, subarch issues are mainly initial booting, bootloader setup, and partitioning. > Mmm, Peter, maybe you or someone could post or document what you showed > us on the Oldenburg blackboard. > > Anyway, i am doing kernel stuff, so i am mostly interested in 1) as well > as 7). I suppose 4), 5) and 6) should be ok for oldworld pmacs, as well > as 3). 2) maybe problematic if the oldworld pmacs are not able to load > udebs from the cdrom drive. the CDROM is fully usable once the linux kernel is booted, the CDROM is just not usable for booting the kernel initially. -- Ethan Benson http://www.alaska.net/~erbenson/
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