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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-03-10 20:53:29 +0300 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-03-20 07:56:57 +0300 |
| commit | c605782b1c3f1c18a55dc1a75b19ed0288f61ac3 (patch) | |
| tree | 2e6673146afcb692dd9c137241e29abe94631679 /arch/powerpc/include/asm/pte-hash64-4k.h | |
| parent | 28794d34ecb6815a3fa0a4256027c9b081a17c5f (diff) | |
| download | linux-c605782b1c3f1c18a55dc1a75b19ed0288f61ac3.tar.xz | |
powerpc/mm: Split the various pgtable-* headers based on MMU type
This patch moves the definition of the PTE format for each MMU type
to separate files instead of all in one file. This improves overall
maintainability and will make it easier to add new types.
On 64-bit, additionally, I've separated the headers relative to the
format of the page table tree (3 vs. 4 levels for 64K vs 4K pages)
from the headers specific to the PTE format for hash based processors,
this will make it easier to add support for Book3 "E" 64-bit
implementations.
There are still some type-related ifdef's in the generic headers,
we might remove them in the long run, but this patch shouldn't result
in any code change, -hopefully- just definitions being moved around.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include/asm/pte-hash64-4k.h')
| -rw-r--r-- | arch/powerpc/include/asm/pte-hash64-4k.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/pte-hash64-4k.h b/arch/powerpc/include/asm/pte-hash64-4k.h new file mode 100644 index 000000000000..29fdc158fe3f --- /dev/null +++ b/arch/powerpc/include/asm/pte-hash64-4k.h @@ -0,0 +1,20 @@ +/* To be include by pgtable-hash64.h only */ + +/* PTE bits */ +#define _PAGE_HASHPTE 0x0400 /* software: pte has an associated HPTE */ +#define _PAGE_SECONDARY 0x8000 /* software: HPTE is in secondary group */ +#define _PAGE_GROUP_IX 0x7000 /* software: HPTE index within group */ +#define _PAGE_F_SECOND _PAGE_SECONDARY +#define _PAGE_F_GIX _PAGE_GROUP_IX +#define _PAGE_SPECIAL 0x10000 /* software: special page */ + +/* There is no 4K PFN hack on 4K pages */ +#define _PAGE_4K_PFN 0 + +/* PTE flags to conserve for HPTE identification */ +#define _PAGE_HPTEFLAGS (_PAGE_BUSY | _PAGE_HASHPTE | \ + _PAGE_SECONDARY | _PAGE_GROUP_IX) + +/* shift to put page number into pte */ +#define PTE_RPN_SHIFT (17) + |