diff options
| author |   Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2017-03-21 22:59:53 +0530 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2017-03-31 23:09:48 +1100 |
| commit | f5bd0fdc0c74dc4cdc5d81319441c4ef9b47cd65 (patch) | |
| tree | 6680be213f706ba5ddcdf6b9d18e4e31a6b62f49 /arch/powerpc/include/asm/book3s/64/hash-64k.h | |
| parent | powerpc/mm/slice: Fix off-by-1 error when computing slice mask (diff) | |
| download | linux-dev-f5bd0fdc0c74dc4cdc5d81319441c4ef9b47cd65.tar.xz linux-dev-f5bd0fdc0c74dc4cdc5d81319441c4ef9b47cd65.zip | |
powerpc/mm: Cleanup bits definition between hash and radix.
Define everything based on bits present in pgtable.h. This will help in easily
identifying overlapping bits between hash/radix.
No functional change with this patch.
Reviewed-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/book3s/64/hash-64k.h')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/hash-64k.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/hash-64k.h b/arch/powerpc/include/asm/book3s/64/hash-64k.h index f3dd21efa2ea..b39f0b86405e 100644 --- a/arch/powerpc/include/asm/book3s/64/hash-64k.h +++ b/arch/powerpc/include/asm/book3s/64/hash-64k.h @@ -6,6 +6,10 @@ #define H_PUD_INDEX_SIZE 5 #define H_PGD_INDEX_SIZE 12 +/* + * 64k aligned address free up few of the lower bits of RPN for us + * We steal that here. For more deatils look at pte_pfn/pfn_pte() + */ #define H_PAGE_COMBO 0x00001000 /* this is a combo 4k page */ #define H_PAGE_4K_PFN 0x00002000 /* PFN is for a single 4k page */ /* |