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| author | Matt Fleming <matt@console-pimps.org> | 2009-11-19 21:11:05 +0000 |
|---|---|---|
| committer | Matt Fleming <matt@console-pimps.org> | 2010-01-16 14:29:06 +0000 |
| commit | 24ef7fc4dcc57afa0c33166c25bfe7676ffd4296 (patch) | |
| tree | d6fc5129f2dbb0534521f5a5111e2bed3cd0f0a7 /arch/sh/include/asm/pgtable_64.h | |
| parent | 8eda55142080f0373b1f0268fe6d6807f193e713 (diff) | |
| download | blackbird-op-linux-24ef7fc4dcc57afa0c33166c25bfe7676ffd4296.tar.gz blackbird-op-linux-24ef7fc4dcc57afa0c33166c25bfe7676ffd4296.zip | |
sh: Acquire some more page flags for SH-5.
We need some more page flags to hook up _PAGE_WIRED (and eventually
other things). So use the unused PTE bits above the PPN field as no
implementations use these for anything currently.
Now that we have _PAGE_WIRED let's provide the SH-5 functions for wiring
up TLB entries.
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Diffstat (limited to 'arch/sh/include/asm/pgtable_64.h')
| -rw-r--r-- | arch/sh/include/asm/pgtable_64.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/arch/sh/include/asm/pgtable_64.h b/arch/sh/include/asm/pgtable_64.h index dd381588c695..0ee46776dad6 100644 --- a/arch/sh/include/asm/pgtable_64.h +++ b/arch/sh/include/asm/pgtable_64.h @@ -123,8 +123,21 @@ static __inline__ void set_pte(pte_t *pteptr, pte_t pteval) #define _PAGE_DIRTY 0x400 /* software: page accessed in write */ #define _PAGE_ACCESSED 0x800 /* software: page referenced */ +/* Wrapper for extended mode pgprot twiddling */ +#define _PAGE_EXT(x) ((unsigned long long)(x) << 32) + +/* + * We can use the sign-extended bits in the PTEL to get 32 bits of + * software flags. This works for now because no implementations uses + * anything above the PPN field. + */ +#define _PAGE_WIRED _PAGE_EXT(0x001) /* software: wire the tlb entry */ + +#define _PAGE_CLEAR_FLAGS (_PAGE_PRESENT | _PAGE_FILE | _PAGE_SHARED | \ + _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_WIRED) + /* Mask which drops software flags */ -#define _PAGE_FLAGS_HARDWARE_MASK 0xfffffffffffff3dbLL +#define _PAGE_FLAGS_HARDWARE_MASK (NEFF_MASK & ~(_PAGE_CLEAR_FLAGS)) /* * HugeTLB support |
