diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2007-05-08 08:27:28 +0200 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-05-09 08:35:00 +0200 |
| commit | 16c2d476232523260c495eafbf9cdc1be984b7df (patch) | |
| tree | fb6614b9752b51864e121317478088978823792c /include/asm-powerpc | |
| parent | [POWERPC] Introduce address space "slices" (diff) | |
| download | linux-16c2d476232523260c495eafbf9cdc1be984b7df.tar.xz linux-16c2d476232523260c495eafbf9cdc1be984b7df.zip | |
[POWERPC] Add ability to 4K kernel to hash in 64K pages
This adds the ability for a kernel compiled with 4K page size
to have special slices containing 64K pages and hash the right type
of hash PTEs.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc')
| -rw-r--r-- | include/asm-powerpc/pgtable-4k.h | 6 | ||||
| -rw-r--r-- | include/asm-powerpc/pgtable-64k.h | 7 |
2 files changed, 11 insertions, 2 deletions
diff --git a/include/asm-powerpc/pgtable-4k.h b/include/asm-powerpc/pgtable-4k.h index 1744d6ac12a2..add5481fd7c7 100644 --- a/include/asm-powerpc/pgtable-4k.h +++ b/include/asm-powerpc/pgtable-4k.h @@ -80,7 +80,11 @@ #define pte_iterate_hashed_end() } while(0) -#define pte_pagesize_index(pte) MMU_PAGE_4K +#ifdef CONFIG_PPC_HAS_HASH_64K +#define pte_pagesize_index(mm, addr, pte) get_slice_psize(mm, addr) +#else +#define pte_pagesize_index(mm, addr, pte) MMU_PAGE_4K +#endif /* * 4-level page tables related bits diff --git a/include/asm-powerpc/pgtable-64k.h b/include/asm-powerpc/pgtable-64k.h index 16ef4978520d..31cbd3d7fce8 100644 --- a/include/asm-powerpc/pgtable-64k.h +++ b/include/asm-powerpc/pgtable-64k.h @@ -35,6 +35,11 @@ #define _PAGE_HPTE_SUB0 0x08000000 /* combo only: first sub page */ #define _PAGE_COMBO 0x10000000 /* this is a combo 4k page */ #define _PAGE_4K_PFN 0x20000000 /* PFN is for a single 4k page */ + +/* Note the full page bits must be in the same location as for normal + * 4k pages as the same asssembly will be used to insert 64K pages + * wether the kernel has CONFIG_PPC_64K_PAGES or not + */ #define _PAGE_F_SECOND 0x00008000 /* full page: hidx bits */ #define _PAGE_F_GIX 0x00007000 /* full page: hidx bits */ @@ -88,7 +93,7 @@ #define pte_iterate_hashed_end() } while(0); } } while(0) -#define pte_pagesize_index(pte) \ +#define pte_pagesize_index(mm, addr, pte) \ (((pte) & _PAGE_COMBO)? MMU_PAGE_4K: MMU_PAGE_64K) #define remap_4k_pfn(vma, addr, pfn, prot) \ |