[PATCH v2 00/19] powerpc/8xx: Optimise MMU TLB handling and add support of 16k pages

From: Christophe Leroy
Date: Fri Aug 29 2014 - 05:13:31 EST

This patchset:
1) provides several MMU TLB handling optimisation on MPC8xx.
2) adds support of 16k pages on MPC8xx.
All changes have been successfully tested on a custom board equipped with MPC885

The two differences with first version of the patch are:
1) I removed the patch number 10, which was implementing a 16 bit alignment of the
PGDIR. It is not worth potentially wasting up to 64k of memory just for removing one
instruction (ori).
2) I managed to preserve r11 while calculating the level 2 address, therefore
no more need to save r11 into CR.

Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxx>
Tested-by: Christophe Leroy <christophe.leroy@xxxxxx>

arch/powerpc/Kconfig | 2 +-
arch/powerpc/include/asm/mmu-8xx.h | 2 +
arch/powerpc/include/asm/pgtable-ppc32.h | 21 ++
arch/powerpc/include/asm/pte-8xx.h | 7 +-
arch/powerpc/include/asm/reg.h | 3 +-
arch/powerpc/kernel/head_8xx.S | 342 +++++++++++-------------
6 files changed, 187 insertions(+), 190 deletions(-)
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/