projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 50a41ff2 DD |
1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public | |
| 3 | * License. See the file "COPYING" in the main directory of this archive | |
| 4 | * for more details. | |
| 5 | * | |
| 6 | * Copyright (C) 2008, 2009 Cavium Networks, Inc. | |
| 7 | */ | |
| 8 | ||
| 9 | #ifndef __ASM_HUGETLB_H | |
| 10 | #define __ASM_HUGETLB_H | |
| 11 | ||
| 12 | #include <asm/page.h> | |
| 106c992a | 13 | #include <asm-generic/hugetlb.h> |
| 50a41ff2 DD |
14 | |
| 15 | ||
| 16 | static inline int is_hugepage_only_range(struct mm_struct *mm, | |
| 17 | unsigned long addr, | |
| 18 | unsigned long len) | |
| 19 | { | |
| 20 | return 0; | |
| 21 | } | |
| 22 | ||
| 23 | static inline int prepare_hugepage_range(struct file *file, | |
| 24 | unsigned long addr, | |
| 25 | unsigned long len) | |
| 26 | { | |
| 27 | unsigned long task_size = STACK_TOP; | |
| 28 | struct hstate *h = hstate_file(file); | |
| 29 | ||
| 30 | if (len & ~huge_page_mask(h)) | |
| 31 | return -EINVAL; | |
| 32 | if (addr & ~huge_page_mask(h)) | |
| 33 | return -EINVAL; | |
| 34 | if (len > task_size) | |
| 35 | return -ENOMEM; | |
| 36 | if (task_size - len < addr) | |
| 37 | return -EINVAL; | |
| 38 | return 0; | |
| 39 | } | |
| 40 | ||
| 41 | static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm) | |
| 42 | { | |
| 43 | } | |
| 44 | ||
| 45 | static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb, | |
| 46 | unsigned long addr, | |
| 47 | unsigned long end, | |
| 48 | unsigned long floor, | |
| 49 | unsigned long ceiling) | |
| 50 | { | |
| 51 | free_pgd_range(tlb, addr, end, floor, ceiling); | |
| 52 | } | |
| 53 | ||
| 54 | static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, | |
| 55 | pte_t *ptep, pte_t pte) | |
| 56 | { | |
| 57 | set_pte_at(mm, addr, ptep, pte); | |
| 58 | } | |
| 59 | ||
| 60 | static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm, | |
| 61 | unsigned long addr, pte_t *ptep) | |
| 62 | { | |
| 63 | pte_t clear; | |
| 64 | pte_t pte = *ptep; | |
| 65 | ||
| 66 | pte_val(clear) = (unsigned long)invalid_pte_table; | |
| 67 | set_pte_at(mm, addr, ptep, clear); | |
| 68 | return pte; | |
| 69 | } | |
| 70 | ||
| 71 | static inline void huge_ptep_clear_flush(struct vm_area_struct *vma, | |
| 72 | unsigned long addr, pte_t *ptep) | |
| 73 | { | |
| 5639bc4a | 74 | flush_tlb_page(vma, addr & huge_page_mask(hstate_vma(vma))); |
| 50a41ff2 DD |
75 | } |
| 76 | ||
| 77 | static inline int huge_pte_none(pte_t pte) | |
| 78 | { | |
| 79 | unsigned long val = pte_val(pte) & ~_PAGE_GLOBAL; | |
| 80 | return !val || (val == (unsigned long)invalid_pte_table); | |
| 81 | } | |
| 82 | ||
| 83 | static inline pte_t huge_pte_wrprotect(pte_t pte) | |
| 84 | { | |
| 85 | return pte_wrprotect(pte); | |
| 86 | } | |
| 87 | ||
| 88 | static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, | |
| 89 | unsigned long addr, pte_t *ptep) | |
| 90 | { | |
| 91 | ptep_set_wrprotect(mm, addr, ptep); | |
| 92 | } | |
| 93 | ||
| 94 | static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, | |
| 95 | unsigned long addr, | |
| 96 | pte_t *ptep, pte_t pte, | |
| 97 | int dirty) | |
| 98 | { | |
| ac53c4fc DD |
99 | int changed = !pte_same(*ptep, pte); |
| 100 | ||
| 101 | if (changed) { | |
| 102 | set_pte_at(vma->vm_mm, addr, ptep, pte); | |
| 103 | /* | |
| 104 | * There could be some standard sized pages in there, | |
| 105 | * get them all. | |
| 106 | */ | |
| 107 | flush_tlb_range(vma, addr, addr + HPAGE_SIZE); | |
| 108 | } | |
| 109 | return changed; | |
| 50a41ff2 DD |
110 | } |
| 111 | ||
| 112 | static inline pte_t huge_ptep_get(pte_t *ptep) | |
| 113 | { | |
| 114 | return *ptep; | |
| 115 | } | |
| 116 | ||
| 117 | static inline int arch_prepare_hugepage(struct page *page) | |
| 118 | { | |
| 119 | return 0; | |
| 120 | } | |
| 121 | ||
| 122 | static inline void arch_release_hugepage(struct page *page) | |
| 123 | { | |
| 124 | } | |
| 125 | ||
| 5d3a551c WD |
126 | static inline void arch_clear_hugepage_flags(struct page *page) |
| 127 | { | |
| 128 | } | |
| 129 | ||
| 50a41ff2 | 130 | #endif /* __ASM_HUGETLB_H */ |