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| author | David S. Miller <davem@davemloft.net> | 2011-07-25 17:12:21 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-07-25 20:57:10 -0700 |
| commit | 683d2fa672da5e3b4fe96f13c43eba32b068d64b (patch) | |
| tree | 6099a5134e6eab57e8b62fb0326ba341cafb091b /arch/sparc/include | |
| parent | 4a0100f7546fb642e0e04a38fa7ca198cd016b47 (diff) | |
| download | lwn-683d2fa672da5e3b4fe96f13c43eba32b068d64b.tar.gz lwn-683d2fa672da5e3b4fe96f13c43eba32b068d64b.zip | |
sparc64: add support for _PAGE_SPECIAL
Luckily there are still a few software PTE bits remaining and they even
match up in both the sun4u and sun4v pte layouts.
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/sparc/include')
| -rw-r--r-- | arch/sparc/include/asm/pgtable_64.h | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h index 1e03c5a6b4f7..adf89329af59 100644 --- a/arch/sparc/include/asm/pgtable_64.h +++ b/arch/sparc/include/asm/pgtable_64.h @@ -95,6 +95,10 @@ /* PTE bits which are the same in SUN4U and SUN4V format. */ #define _PAGE_VALID _AC(0x8000000000000000,UL) /* Valid TTE */ #define _PAGE_R _AC(0x8000000000000000,UL) /* Keep ref bit uptodate*/ +#define _PAGE_SPECIAL _AC(0x0200000000000000,UL) /* Special page */ + +/* Advertise support for _PAGE_SPECIAL */ +#define __HAVE_ARCH_PTE_SPECIAL /* SUN4U pte bits... */ #define _PAGE_SZ4MB_4U _AC(0x6000000000000000,UL) /* 4MB Page */ @@ -104,6 +108,7 @@ #define _PAGE_NFO_4U _AC(0x1000000000000000,UL) /* No Fault Only */ #define _PAGE_IE_4U _AC(0x0800000000000000,UL) /* Invert Endianness */ #define _PAGE_SOFT2_4U _AC(0x07FC000000000000,UL) /* Software bits, set 2 */ +#define _PAGE_SPECIAL_4U _AC(0x0200000000000000,UL) /* Special page */ #define _PAGE_RES1_4U _AC(0x0002000000000000,UL) /* Reserved */ #define _PAGE_SZ32MB_4U _AC(0x0001000000000000,UL) /* (Panther) 32MB page */ #define _PAGE_SZ256MB_4U _AC(0x2001000000000000,UL) /* (Panther) 256MB page */ @@ -133,6 +138,7 @@ #define _PAGE_ACCESSED_4V _AC(0x1000000000000000,UL) /* Accessed (ref'd) */ #define _PAGE_READ_4V _AC(0x0800000000000000,UL) /* Readable SW Bit */ #define _PAGE_WRITE_4V _AC(0x0400000000000000,UL) /* Writable SW Bit */ +#define _PAGE_SPECIAL_4V _AC(0x0200000000000000,UL) /* Special page */ #define _PAGE_PADDR_4V _AC(0x00FFFFFFFFFFE000,UL) /* paddr[55:13] */ #define _PAGE_IE_4V _AC(0x0000000000001000,UL) /* Invert Endianness */ #define _PAGE_E_4V _AC(0x0000000000000800,UL) /* side-Effect */ @@ -302,10 +308,10 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t prot) : "=r" (mask), "=r" (tmp) : "i" (_PAGE_PADDR_4U | _PAGE_MODIFIED_4U | _PAGE_ACCESSED_4U | _PAGE_CP_4U | _PAGE_CV_4U | _PAGE_E_4U | _PAGE_PRESENT_4U | - _PAGE_SZBITS_4U), + _PAGE_SZBITS_4U | _PAGE_SPECIAL), "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V | _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_E_4V | _PAGE_PRESENT_4V | - _PAGE_SZBITS_4V)); + _PAGE_SZBITS_4V | _PAGE_SPECIAL)); return __pte((pte_val(pte) & mask) | (pgprot_val(prot) & ~mask)); } @@ -502,6 +508,7 @@ static inline pte_t pte_mkyoung(pte_t pte) static inline pte_t pte_mkspecial(pte_t pte) { + pte_val(pte) |= _PAGE_SPECIAL; return pte; } @@ -607,9 +614,9 @@ static inline unsigned long pte_present(pte_t pte) return val; } -static inline int pte_special(pte_t pte) +static inline unsigned long pte_special(pte_t pte) { - return 0; + return pte_val(pte) & _PAGE_SPECIAL; } #define pmd_set(pmdp, ptep) \ |