dfb542ade6b16653cb320cc84c472b62568bf9cc
2 * IBM System z Huge TLB Page Support for Kernel.
4 * Copyright IBM Corp. 2008
5 * Author(s): Gerald Schaefer <gerald.schaefer@de.ibm.com>
8 #ifndef _ASM_S390_HUGETLB_H
9 #define _ASM_S390_HUGETLB_H
12 #include <asm/pgtable.h>
15 #define is_hugepage_only_range(mm, addr, len) 0
16 #define hugetlb_free_pgd_range free_pgd_range
18 void set_huge_pte_at(struct mm_struct
*mm
, unsigned long addr
,
19 pte_t
*ptep
, pte_t pte
);
20 pte_t
huge_ptep_get(pte_t
*ptep
);
21 pte_t
huge_ptep_get_and_clear(struct mm_struct
*mm
,
22 unsigned long addr
, pte_t
*ptep
);
25 * If the arch doesn't supply something else, assume that hugepage
26 * size aligned regions are ok without further preparation.
28 static inline int prepare_hugepage_range(struct file
*file
,
29 unsigned long addr
, unsigned long len
)
31 if (len
& ~HPAGE_MASK
)
33 if (addr
& ~HPAGE_MASK
)
38 #define arch_clear_hugepage_flags(page) do { } while (0)
40 int arch_prepare_hugepage(struct page
*page
);
41 void arch_release_hugepage(struct page
*page
);
43 static inline void huge_pte_clear(struct mm_struct
*mm
, unsigned long addr
,
46 pte_val(*ptep
) = _SEGMENT_ENTRY_EMPTY
;
49 static inline void huge_ptep_clear_flush(struct vm_area_struct
*vma
,
50 unsigned long address
, pte_t
*ptep
)
52 huge_ptep_get_and_clear(vma
->vm_mm
, address
, ptep
);
55 static inline int huge_ptep_set_access_flags(struct vm_area_struct
*vma
,
56 unsigned long addr
, pte_t
*ptep
,
59 int changed
= !pte_same(huge_ptep_get(ptep
), pte
);
61 huge_ptep_get_and_clear(vma
->vm_mm
, addr
, ptep
);
62 set_huge_pte_at(vma
->vm_mm
, addr
, ptep
, pte
);
67 static inline void huge_ptep_set_wrprotect(struct mm_struct
*mm
,
68 unsigned long addr
, pte_t
*ptep
)
70 pte_t pte
= huge_ptep_get_and_clear(mm
, addr
, ptep
);
71 set_huge_pte_at(mm
, addr
, ptep
, pte_wrprotect(pte
));
74 static inline pte_t
mk_huge_pte(struct page
*page
, pgprot_t pgprot
)
76 return mk_pte(page
, pgprot
);
79 static inline int huge_pte_none(pte_t pte
)
84 static inline int huge_pte_write(pte_t pte
)
86 return pte_write(pte
);
89 static inline int huge_pte_dirty(pte_t pte
)
91 return pte_dirty(pte
);
94 static inline pte_t
huge_pte_mkwrite(pte_t pte
)
96 return pte_mkwrite(pte
);
99 static inline pte_t
huge_pte_mkdirty(pte_t pte
)
101 return pte_mkdirty(pte
);
104 static inline pte_t
huge_pte_wrprotect(pte_t pte
)
106 return pte_wrprotect(pte
);
109 static inline pte_t
huge_pte_modify(pte_t pte
, pgprot_t newprot
)
111 return pte_modify(pte
, newprot
);
114 #endif /* _ASM_S390_HUGETLB_H */
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