powerpc/44x: Fix/Initialize PID to kernel PID before the TLB search

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Initialize the PID register with kernel pid (0) before we start
setting the TLB mapping for KEXEC. Also set the MMUCR[TID] to kernel
PID.

This was spotted while testing the kexec on ISS for 47x. ISS  doesn't
return a successful tlbsx for a kernel address with PID set to a user PID.
Though the hardware/qemu/simics work fine.

This patch is harmless and initializes the PID to 0 (kernel PID) which
is usually the case during a normal kernel boot. This would fix the kexec
on ISS for 440. I have tested this patch on sequoia board.

Signed-off-by: Suzuki K Poulose <suzuki@in.ibm.com>
Cc: Josh Boyer <jwboyer@gmail.com>
Signed-off-by: Josh Boyer <jwboyer@gmail.com>

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Suzuki Poulose 2012-04-15 21:48:21 +00:00 • committed by Josh Boyer

parent ec34a68149

commit f13bfcc696

1 changed files with 6 additions and 2 deletions

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arch/powerpc/kernel/misc_32.S

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