• Christophe Leroy's avatar
    powerpc: port 64 bits pgtable_cache to 32 bits · 9b081e10
    Christophe Leroy authored
    Today powerpc64 uses a set of pgtable_caches while powerpc32 uses
    standard pages when using 4k pages and a single pgtable_cache
    if using other size pages.
    
    In preparation of implementing huge pages on the 8xx, this patch
    replaces the specific powerpc32 handling by the 64 bits approach.
    
    This is done by:
    * moving 64 bits pgtable_cache_add() and pgtable_cache_init()
    in a new file called init-common.c
    * modifying pgtable_cache_init() to also handle the case
    without PMD
    * removing the 32 bits version of pgtable_cache_add() and
    pgtable_cache_init()
    * copying related header contents from 64 bits into both the
    book3s/32 and nohash/32 header files
    
    On the 8xx, the following cache sizes will be used:
    * 4k pages mode:
    - PGT_CACHE(10) for PGD
    - PGT_CACHE(3) for 512k hugepage tables
    * 16k pages mode:
    - PGT_CACHE(6) for PGD
    - PGT_CACHE(7) for 512k hugepage tables
    - PGT_CACHE(3) for 8M hugepage tables
    Signed-off-by: default avatarChristophe Leroy <christophe.leroy@c-s.fr>
    Reviewed-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
    Signed-off-by: default avatarScott Wood <oss@buserror.net>
    9b081e10
pgtable.h 10.6 KB