This is a set of patches to add kexec support for m68k to the Linux kernel.
- Kexec only, no kdump support yet (do you have enough RAM to keep a
crashdump kernel in memory at all times? ;-)
- Tested on ARAnyM, with emulated 68040.
I tested the behavior for machines where memory doesn't start at zero
(e.g. Amiga) by modifying the bootinfo to make ST-RAM memory start at
0x20000000, which also works (this does require a small patch to make
atari_stram_init() succeed).
- Tested on Amiga 4000/040, where it hangs :-(
Probably this is due to lack of memory. It also crashes on ARAnyM with only
12 MiB of RAM. It seems something is corrupted when copying, although I
couldn't detect any overlapping copies using the debug code in patch 1.
- Test results on real machines with more than 16 MiB of RAM and different
CPUs would be welcome!
You can download a kexec binary from
http://users.telenet.be/geertu/Download/kexec-m68k-2013-10-15.tar.bz2
- To have automatic "kexec -e" on reboot, copy /etc/rc6.d/S85kexec from
another system, and fix it up for kexec living in /usr/local/sbin instead
of /sbin.
- Sample invocation:
kexec -d -l vmlinux --reuse-cmdline
reboot
Patches:
- [PATCH 1/3] kexec: Add debug printing of kimage table entries
- v2: new patch
- [PATCH 2/3] m68k: Add kexec support
- v2:
- KEXEC depends on M68KCLASSIC,
- Fix handling of virtual and physical addresses, for machines where
memory doesn't start at zero,
- Support for other CPUs than 68040.
- [PATCH 3/3] m68k: Add support to export bootinfo in procfs
- v2: no changes
- "m68k: Add System RAM to /proc/iomem" was dropped in v2.
Have fun!
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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