xref: /openbmc/linux/arch/sh/include/asm/hugetlb.h (revision 5df29bca) 
1 #ifndef _ASM_SH_HUGETLB_H
2 #define _ASM_SH_HUGETLB_H
3 
4 #include <asm/cacheflush.h>
5 #include <asm/page.h>
6 #include <asm-generic/hugetlb.h>
7 
8 
9 static inline int is_hugepage_only_range(struct mm_struct *mm,
10 					 unsigned long addr,
11 					 unsigned long len) {
12 	return 0;
13 }
14 
15 /*
16  * If the arch doesn't supply something else, assume that hugepage
17  * size aligned regions are ok without further preparation.
18  */
19 static inline int prepare_hugepage_range(struct file *file,
20 			unsigned long addr, unsigned long len)
21 {
22 	if (len & ~HPAGE_MASK)
23 		return -EINVAL;
24 	if (addr & ~HPAGE_MASK)
25 		return -EINVAL;
26 	return 0;
27 }
28 
29 static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
30 					  unsigned long addr, unsigned long end,
31 					  unsigned long floor,
32 					  unsigned long ceiling)
33 {
34 	free_pgd_range(tlb, addr, end, floor, ceiling);
35 }
36 
37 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
38 				   pte_t *ptep, pte_t pte)
39 {
40 	set_pte_at(mm, addr, ptep, pte);
41 }
42 
43 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
44 					    unsigned long addr, pte_t *ptep)
45 {
46 	return ptep_get_and_clear(mm, addr, ptep);
47 }
48 
49 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
50 					 unsigned long addr, pte_t *ptep)
51 {
52 }
53 
54 static inline int huge_pte_none(pte_t pte)
55 {
56 	return pte_none(pte);
57 }
58 
59 static inline pte_t huge_pte_wrprotect(pte_t pte)
60 {
61 	return pte_wrprotect(pte);
62 }
63 
64 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
65 					   unsigned long addr, pte_t *ptep)
66 {
67 	ptep_set_wrprotect(mm, addr, ptep);
68 }
69 
70 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
71 					     unsigned long addr, pte_t *ptep,
72 					     pte_t pte, int dirty)
73 {
74 	return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
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 	clear_bit(PG_dcache_clean, &page->flags);
85 }
86 
87 #endif /* _ASM_SH_HUGETLB_H */
88