xref: /openbmc/linux/arch/sparc/include/asm/hugetlb.h (revision 275876e2) 
1 #ifndef _ASM_SPARC64_HUGETLB_H
2 #define _ASM_SPARC64_HUGETLB_H
3 
4 #include <asm/page.h>
5 #include <asm-generic/hugetlb.h>
6 
7 
8 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
9 		     pte_t *ptep, pte_t pte);
10 
11 pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
12 			      pte_t *ptep);
13 
14 static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
15 {
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 	pte_t old_pte = *ptep;
65 	set_huge_pte_at(mm, addr, ptep, pte_wrprotect(old_pte));
66 }
67 
68 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
69 					     unsigned long addr, pte_t *ptep,
70 					     pte_t pte, int dirty)
71 {
72 	int changed = !pte_same(*ptep, pte);
73 	if (changed) {
74 		set_huge_pte_at(vma->vm_mm, addr, ptep, pte);
75 		flush_tlb_page(vma, addr);
76 	}
77 	return changed;
78 }
79 
80 static inline pte_t huge_ptep_get(pte_t *ptep)
81 {
82 	return *ptep;
83 }
84 
85 static inline int arch_prepare_hugepage(struct page *page)
86 {
87 	return 0;
88 }
89 
90 static inline void arch_release_hugepage(struct page *page)
91 {
92 }
93 
94 static inline void arch_clear_hugepage_flags(struct page *page)
95 {
96 }
97 
98 #endif /* _ASM_SPARC64_HUGETLB_H */
99