1 #ifndef _ASM_GENERIC_PGTABLE_H
2 #define _ASM_GENERIC_PGTABLE_H
4 #ifndef __HAVE_ARCH_PTEP_ESTABLISH
6 * Establish a new mapping:
8 * - update the page tables
9 * - inform the TLB about the new one
11 * We hold the mm semaphore for reading and vma->vm_mm->page_table_lock.
13 * Note: the old pte is known to not be writable, so we don't need to
14 * worry about dirty bits etc getting lost.
16 #ifndef __HAVE_ARCH_SET_PTE_ATOMIC
17 #define ptep_establish(__vma, __address, __ptep, __entry) \
19 set_pte(__ptep, __entry); \
20 flush_tlb_page(__vma, __address); \
22 #else /* __HAVE_ARCH_SET_PTE_ATOMIC */
23 #define ptep_establish(__vma, __address, __ptep, __entry) \
25 set_pte_atomic(__ptep, __entry); \
26 flush_tlb_page(__vma, __address); \
28 #endif /* __HAVE_ARCH_SET_PTE_ATOMIC */
31 #ifndef __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
33 * Largely same as above, but only sets the access flags (dirty,
34 * accessed, and writable). Furthermore, we know it always gets set
35 * to a "more permissive" setting, which allows most architectures
38 #define ptep_set_access_flags(__vma, __address, __ptep, __entry, __dirty) \
40 set_pte(__ptep, __entry); \
41 flush_tlb_page(__vma, __address); \
45 #ifndef __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
46 static inline int ptep_test_and_clear_young(pte_t *ptep)
51 set_pte(ptep, pte_mkold(pte));
56 #ifndef __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
57 #define ptep_clear_flush_young(__vma, __address, __ptep) \
59 int __young = ptep_test_and_clear_young(__ptep); \
61 flush_tlb_page(__vma, __address); \
66 #ifndef __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
67 static inline int ptep_test_and_clear_dirty(pte_t *ptep)
72 set_pte(ptep, pte_mkclean(pte));
77 #ifndef __HAVE_ARCH_PTEP_CLEAR_DIRTY_FLUSH
78 #define ptep_clear_flush_dirty(__vma, __address, __ptep) \
80 int __dirty = ptep_test_and_clear_dirty(__ptep); \
82 flush_tlb_page(__vma, __address); \
87 #ifndef __HAVE_ARCH_PTEP_GET_AND_CLEAR
88 static inline pte_t ptep_get_and_clear(pte_t *ptep)
96 #ifndef __HAVE_ARCH_PTEP_CLEAR_FLUSH
97 #define ptep_clear_flush(__vma, __address, __ptep) \
99 pte_t __pte = ptep_get_and_clear(__ptep); \
100 flush_tlb_page(__vma, __address); \
105 #ifndef __HAVE_ARCH_PTEP_SET_WRPROTECT
106 static inline void ptep_set_wrprotect(pte_t *ptep)
108 pte_t old_pte = *ptep;
109 set_pte(ptep, pte_wrprotect(old_pte));
113 #ifndef __HAVE_ARCH_PTEP_MKDIRTY
114 static inline void ptep_mkdirty(pte_t *ptep)
116 pte_t old_pte = *ptep;
117 set_pte(ptep, pte_mkdirty(old_pte));
121 #ifndef __HAVE_ARCH_PTE_SAME
122 #define pte_same(A,B) (pte_val(A) == pte_val(B))
125 #ifndef __HAVE_ARCH_PAGE_TEST_AND_CLEAR_DIRTY
126 #define page_test_and_clear_dirty(page) (0)
129 #ifndef __HAVE_ARCH_PAGE_TEST_AND_CLEAR_YOUNG
130 #define page_test_and_clear_young(page) (0)
133 #ifndef __HAVE_ARCH_PGD_OFFSET_GATE
134 #define pgd_offset_gate(mm, addr) pgd_offset(mm, addr)
137 #endif /* _ASM_GENERIC_PGTABLE_H */