1#ifndef _ASM_X86_HUGETLB_H
2#define _ASM_X86_HUGETLB_H
3
4#include <asm/page.h>
5#include <asm-generic/hugetlb.h>
6
7#define hugepages_supported() cpu_has_pse
8
9static 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 */
19static inline int prepare_hugepage_range(struct file *file,
20			unsigned long addr, unsigned long len)
21{
22	struct hstate *h = hstate_file(file);
23	if (len & ~huge_page_mask(h))
24		return -EINVAL;
25	if (addr & ~huge_page_mask(h))
26		return -EINVAL;
27	return 0;
28}
29
30static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm) {
31}
32
33static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
34					  unsigned long addr, unsigned long end,
35					  unsigned long floor,
36					  unsigned long ceiling)
37{
38	free_pgd_range(tlb, addr, end, floor, ceiling);
39}
40
41static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
42				   pte_t *ptep, pte_t pte)
43{
44	set_pte_at(mm, addr, ptep, pte);
45}
46
47static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
48					    unsigned long addr, pte_t *ptep)
49{
50	return ptep_get_and_clear(mm, addr, ptep);
51}
52
53static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
54					 unsigned long addr, pte_t *ptep)
55{
56	ptep_clear_flush(vma, addr, ptep);
57}
58
59static inline int huge_pte_none(pte_t pte)
60{
61	return pte_none(pte);
62}
63
64static inline pte_t huge_pte_wrprotect(pte_t pte)
65{
66	return pte_wrprotect(pte);
67}
68
69static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
70					   unsigned long addr, pte_t *ptep)
71{
72	ptep_set_wrprotect(mm, addr, ptep);
73}
74
75static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
76					     unsigned long addr, pte_t *ptep,
77					     pte_t pte, int dirty)
78{
79	return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
80}
81
82static inline pte_t huge_ptep_get(pte_t *ptep)
83{
84	return *ptep;
85}
86
87static inline int arch_prepare_hugepage(struct page *page)
88{
89	return 0;
90}
91
92static inline void arch_release_hugepage(struct page *page)
93{
94}
95
96static inline void arch_clear_hugepage_flags(struct page *page)
97{
98}
99
100#endif /* _ASM_X86_HUGETLB_H */
101