59d89b52ccb7adf5eb9b0e0b16b756676b1dfabb
[muen/linux.git] / arch / sparc / include / asm / hugetlb.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_SPARC64_HUGETLB_H
3 #define _ASM_SPARC64_HUGETLB_H
4
5 #include <asm/page.h>
6
7 #ifdef CONFIG_HUGETLB_PAGE
8 struct pud_huge_patch_entry {
9         unsigned int addr;
10         unsigned int insn;
11 };
12 extern struct pud_huge_patch_entry __pud_huge_patch, __pud_huge_patch_end;
13 #endif
14
15 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
16                      pte_t *ptep, pte_t pte);
17
18 pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
19                               pte_t *ptep);
20
21 static inline int is_hugepage_only_range(struct mm_struct *mm,
22                                          unsigned long addr,
23                                          unsigned long len) {
24         return 0;
25 }
26
27 /*
28  * If the arch doesn't supply something else, assume that hugepage
29  * size aligned regions are ok without further preparation.
30  */
31 static inline int prepare_hugepage_range(struct file *file,
32                         unsigned long addr, unsigned long len)
33 {
34         struct hstate *h = hstate_file(file);
35
36         if (len & ~huge_page_mask(h))
37                 return -EINVAL;
38         if (addr & ~huge_page_mask(h))
39                 return -EINVAL;
40         return 0;
41 }
42
43 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
44                                          unsigned long addr, pte_t *ptep)
45 {
46 }
47
48 static inline int huge_pte_none(pte_t pte)
49 {
50         return pte_none(pte);
51 }
52
53 static inline pte_t huge_pte_wrprotect(pte_t pte)
54 {
55         return pte_wrprotect(pte);
56 }
57
58 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
59                                            unsigned long addr, pte_t *ptep)
60 {
61         pte_t old_pte = *ptep;
62         set_huge_pte_at(mm, addr, ptep, pte_wrprotect(old_pte));
63 }
64
65 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
66                                              unsigned long addr, pte_t *ptep,
67                                              pte_t pte, int dirty)
68 {
69         int changed = !pte_same(*ptep, pte);
70         if (changed) {
71                 set_huge_pte_at(vma->vm_mm, addr, ptep, pte);
72                 flush_tlb_page(vma, addr);
73         }
74         return changed;
75 }
76
77 static inline pte_t huge_ptep_get(pte_t *ptep)
78 {
79         return *ptep;
80 }
81
82 static inline void arch_clear_hugepage_flags(struct page *page)
83 {
84 }
85
86 #define __HAVE_ARCH_HUGETLB_FREE_PGD_RANGE
87 void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
88                             unsigned long end, unsigned long floor,
89                             unsigned long ceiling);
90
91 #include <asm-generic/hugetlb.h>
92
93 #endif /* _ASM_SPARC64_HUGETLB_H */