sparc64: Support transparent huge pages.
[~shefty/rdma-dev.git] / arch / sparc / include / asm / hugetlb.h
1 #ifndef _ASM_SPARC64_HUGETLB_H
2 #define _ASM_SPARC64_HUGETLB_H
3
4 #include <asm/page.h>
5
6
7 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
8                      pte_t *ptep, pte_t pte);
9
10 pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
11                               pte_t *ptep);
12
13 static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
14 {
15         hugetlb_setup(mm);
16 }
17
18 static inline int is_hugepage_only_range(struct mm_struct *mm,
19                                          unsigned long addr,
20                                          unsigned long len) {
21         return 0;
22 }
23
24 /*
25  * If the arch doesn't supply something else, assume that hugepage
26  * size aligned regions are ok without further preparation.
27  */
28 static inline int prepare_hugepage_range(struct file *file,
29                         unsigned long addr, unsigned long len)
30 {
31         if (len & ~HPAGE_MASK)
32                 return -EINVAL;
33         if (addr & ~HPAGE_MASK)
34                 return -EINVAL;
35         return 0;
36 }
37
38 static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
39                                           unsigned long addr, unsigned long end,
40                                           unsigned long floor,
41                                           unsigned long ceiling)
42 {
43         free_pgd_range(tlb, addr, end, floor, ceiling);
44 }
45
46 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
47                                          unsigned long addr, pte_t *ptep)
48 {
49 }
50
51 static inline int huge_pte_none(pte_t pte)
52 {
53         return pte_none(pte);
54 }
55
56 static inline pte_t huge_pte_wrprotect(pte_t pte)
57 {
58         return pte_wrprotect(pte);
59 }
60
61 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
62                                            unsigned long addr, pte_t *ptep)
63 {
64         ptep_set_wrprotect(mm, addr, ptep);
65 }
66
67 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
68                                              unsigned long addr, pte_t *ptep,
69                                              pte_t pte, int dirty)
70 {
71         return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
72 }
73
74 static inline pte_t huge_ptep_get(pte_t *ptep)
75 {
76         return *ptep;
77 }
78
79 static inline int arch_prepare_hugepage(struct page *page)
80 {
81         return 0;
82 }
83
84 static inline void arch_release_hugepage(struct page *page)
85 {
86 }
87
88 static inline void arch_clear_hugepage_flags(struct page *page)
89 {
90 }
91
92 #endif /* _ASM_SPARC64_HUGETLB_H */