xref: /openbmc/linux/arch/sparc/include/asm/hugetlb.h (revision 9d749629) 
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 }
16 
17 static inline int is_hugepage_only_range(struct mm_struct *mm,
18 					 unsigned long addr,
19 					 unsigned long len) {
20 	return 0;
21 }
22 
23 /*
24  * If the arch doesn't supply something else, assume that hugepage
25  * size aligned regions are ok without further preparation.
26  */
27 static inline int prepare_hugepage_range(struct file *file,
28 			unsigned long addr, unsigned long len)
29 {
30 	if (len & ~HPAGE_MASK)
31 		return -EINVAL;
32 	if (addr & ~HPAGE_MASK)
33 		return -EINVAL;
34 	return 0;
35 }
36 
37 static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
38 					  unsigned long addr, unsigned long end,
39 					  unsigned long floor,
40 					  unsigned long ceiling)
41 {
42 	free_pgd_range(tlb, addr, end, floor, ceiling);
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 void huge_ptep_set_wrprotect(struct mm_struct *mm,
61 					   unsigned long addr, pte_t *ptep)
62 {
63 	pte_t old_pte = *ptep;
64 	set_huge_pte_at(mm, addr, ptep, pte_wrprotect(old_pte));
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 	int changed = !pte_same(*ptep, pte);
72 	if (changed) {
73 		set_huge_pte_at(vma->vm_mm, addr, ptep, pte);
74 		flush_tlb_page(vma, addr);
75 	}
76 	return changed;
77 }
78 
79 static inline pte_t huge_ptep_get(pte_t *ptep)
80 {
81 	return *ptep;
82 }
83 
84 static inline int arch_prepare_hugepage(struct page *page)
85 {
86 	return 0;
87 }
88 
89 static inline void arch_release_hugepage(struct page *page)
90 {
91 }
92 
93 static inline void arch_clear_hugepage_flags(struct page *page)
94 {
95 }
96 
97 #endif /* _ASM_SPARC64_HUGETLB_H */
98