diff options
Diffstat (limited to 'include/asm-x86_64/pgtable.h')
| -rw-r--r-- | include/asm-x86_64/pgtable.h | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/include/asm-x86_64/pgtable.h b/include/asm-x86_64/pgtable.h index 4e167b5ea8f3..5e0f2fdab0d3 100644 --- a/include/asm-x86_64/pgtable.h +++ b/include/asm-x86_64/pgtable.h @@ -104,6 +104,19 @@ extern inline void pgd_clear (pgd_t * pgd) ((unsigned long) __va(pud_val(pud) & PHYSICAL_PAGE_MASK)) #define ptep_get_and_clear(mm,addr,xp) __pte(xchg(&(xp)->pte, 0)) + +static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, unsigned long addr, pte_t *ptep, int full) +{ + pte_t pte; + if (full) { + pte = *ptep; + *ptep = __pte(0); + } else { + pte = ptep_get_and_clear(mm, addr, ptep); + } + return pte; +} + #define pte_same(a, b) ((a).pte == (b).pte) #define PMD_SIZE (1UL << PMD_SHIFT) @@ -143,7 +156,7 @@ extern inline void pgd_clear (pgd_t * pgd) #define _PAGE_ACCESSED 0x020 #define _PAGE_DIRTY 0x040 #define _PAGE_PSE 0x080 /* 2MB page */ -#define _PAGE_FILE 0x040 /* set:pagecache, unset:swap */ +#define _PAGE_FILE 0x040 /* nonlinear file mapping, saved PTE; unset:swap */ #define _PAGE_GLOBAL 0x100 /* Global TLB entry */ #define _PAGE_PROTNONE 0x080 /* If not present */ @@ -247,6 +260,7 @@ static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) * The following only work if pte_present() is true. * Undefined behaviour if not.. */ +#define __LARGE_PTE (_PAGE_PSE|_PAGE_PRESENT) static inline int pte_user(pte_t pte) { return pte_val(pte) & _PAGE_USER; } extern inline int pte_read(pte_t pte) { return pte_val(pte) & _PAGE_USER; } extern inline int pte_exec(pte_t pte) { return pte_val(pte) & _PAGE_USER; } @@ -254,8 +268,8 @@ extern inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; } extern inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; } extern inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW; } static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; } +static inline int pte_huge(pte_t pte) { return (pte_val(pte) & __LARGE_PTE) == __LARGE_PTE; } -#define __LARGE_PTE (_PAGE_PSE|_PAGE_PRESENT) extern inline pte_t pte_rdprotect(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_USER)); return pte; } extern inline pte_t pte_exprotect(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_USER)); return pte; } extern inline pte_t pte_mkclean(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_DIRTY)); return pte; } @@ -433,6 +447,7 @@ extern int kern_addr_valid(unsigned long addr); #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY #define __HAVE_ARCH_PTEP_GET_AND_CLEAR +#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL #define __HAVE_ARCH_PTEP_SET_WRPROTECT #define __HAVE_ARCH_PTE_SAME #include <asm-generic/pgtable.h> |