On Apr 4, 2010, at 3:19 PM, Sebastian Andrzej Siewior wrote: > From: Sebastian Andrzej Siewior <bige...@linutronix.de> > > This adds support kexec on FSL-BookE where the MMU can not be simply > switched off. The code borrows the initial MMU-setup code to create the > identical mapping mapping. The only difference to the original boot code > is the size of the mapping(s) and the executeable address. > The kexec code maps the first 2 GiB of memory in 256 MiB steps. This > should work also on e500v1 boxes. > SMP support is still not available. > > Signed-off-by: Sebastian Andrzej Siewior <bige...@linutronix.de> > --- > arch/powerpc/Kconfig | 2 +- > arch/powerpc/include/asm/kexec.h | 13 +++++++++ > arch/powerpc/kernel/fsl_booke_entry_mapping.S | 37 +++++++++++++++++++++++++ > arch/powerpc/kernel/head_fsl_booke.S | 2 + > arch/powerpc/kernel/misc_32.S | 17 +++++++++++ > 5 files changed, 70 insertions(+), 1 deletions(-)
Can you explain this a bit more. Mostly would like to have a brief description of the sequence of events as part of the commit message. Something like: * Running kernel calls machine_kexec() * machine_kexec_32() * jump to relocate code * relocate clears out TLBs and sets up 2g mapping ... what I have above might not be quite right. - k _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
