tree c2d4c2bd279ea26abe06cb78138558f9273f59e3
parent fb293ae1c02dab78e714d50f2c37d7852d6f328a
author Benjamin Herrenschmidt <benh@au1.ibm.com> 1193521768 +1100
committer Paul Mackerras <paulus@samba.org> 1194491730 +1100

[POWERPC] Fix cache line vs. block size confusion

We had an historical confusion in the kernel between cache line
and cache block size. The former is an implementation detail of
the L1 cache which can be useful for performance optimisations,
the later is the actual size on which the cache control
instructions operate, which can be different.

For some reason, we had a weird hack reading the right property
on powermac and the wrong one on any other 64 bits (32 bits is
unaffected as it only uses the cputable for cache block size
infos at this stage).

This fixes the booting-without-of.txt documentation to mention
the right properties, and fixes the 64 bits initialization code
to look for the block size first, with a fallback to the line
size if the property is missing.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>