Merge commit 'v2.6.29-rc1' into perfcounters/core
[linux-2.6] / arch / powerpc / include / asm / hugetlb.h
1 #ifndef _ASM_POWERPC_HUGETLB_H
2 #define _ASM_POWERPC_HUGETLB_H
3
4 #include <asm/page.h>
5
6
7 int is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
8                            unsigned long len);
9
10 void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
11                             unsigned long end, unsigned long floor,
12                             unsigned long ceiling);
13
14 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
15                      pte_t *ptep, pte_t pte);
16
17 pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
18                               pte_t *ptep);
19
20 /*
21  * The version of vma_mmu_pagesize() in arch/powerpc/mm/hugetlbpage.c needs
22  * to override the version in mm/hugetlb.c
23  */
24 #define vma_mmu_pagesize vma_mmu_pagesize
25
26 /*
27  * If the arch doesn't supply something else, assume that hugepage
28  * size aligned regions are ok without further preparation.
29  */
30 static inline int prepare_hugepage_range(struct file *file,
31                         unsigned long addr, unsigned long len)
32 {
33         struct hstate *h = hstate_file(file);
34         if (len & ~huge_page_mask(h))
35                 return -EINVAL;
36         if (addr & ~huge_page_mask(h))
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 huge_ptep_clear_flush(struct vm_area_struct *vma,
46                                          unsigned long addr, pte_t *ptep)
47 {
48 }
49
50 static inline int huge_pte_none(pte_t pte)
51 {
52         return pte_none(pte);
53 }
54
55 static inline pte_t huge_pte_wrprotect(pte_t pte)
56 {
57         return pte_wrprotect(pte);
58 }
59
60 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
61                                              unsigned long addr, pte_t *ptep,
62                                              pte_t pte, int dirty)
63 {
64         return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
65 }
66
67 static inline pte_t huge_ptep_get(pte_t *ptep)
68 {
69         return *ptep;
70 }
71
72 static inline int arch_prepare_hugepage(struct page *page)
73 {
74         return 0;
75 }
76
77 static inline void arch_release_hugepage(struct page *page)
78 {
79 }
80
81 #endif /* _ASM_POWERPC_HUGETLB_H */