1/*
2 * Copyright 2010 Tilera Corporation. All Rights Reserved.
3 *
4 *   This program is free software; you can redistribute it and/or
5 *   modify it under the terms of the GNU General Public License
6 *   as published by the Free Software Foundation, version 2.
7 *
8 *   This program is distributed in the hope that it will be useful, but
9 *   WITHOUT ANY WARRANTY; without even the implied warranty of
10 *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
11 *   NON INFRINGEMENT.  See the GNU General Public License for
12 *   more details.
13 */
14
15#ifndef _ASM_TILE_HUGETLB_H
16#define _ASM_TILE_HUGETLB_H
17
18#include <asm/page.h>
19#include <asm-generic/hugetlb.h>
20
21
22static inline int is_hugepage_only_range(struct mm_struct *mm,
23					 unsigned long addr,
24					 unsigned long len) {
25	return 0;
26}
27
28/*
29 * If the arch doesn't supply something else, assume that hugepage
30 * size aligned regions are ok without further preparation.
31 */
32static inline int prepare_hugepage_range(struct file *file,
33					 unsigned long addr, unsigned long len)
34{
35	struct hstate *h = hstate_file(file);
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
43static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
44					  unsigned long addr, unsigned long end,
45					  unsigned long floor,
46					  unsigned long ceiling)
47{
48	free_pgd_range(tlb, addr, end, floor, ceiling);
49}
50
51static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
52				   pte_t *ptep, pte_t pte)
53{
54	set_pte(ptep, pte);
55}
56
57static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
58					    unsigned long addr, pte_t *ptep)
59{
60	return ptep_get_and_clear(mm, addr, ptep);
61}
62
63static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
64					 unsigned long addr, pte_t *ptep)
65{
66	ptep_clear_flush(vma, addr, ptep);
67}
68
69static inline int huge_pte_none(pte_t pte)
70{
71	return pte_none(pte);
72}
73
74static inline pte_t huge_pte_wrprotect(pte_t pte)
75{
76	return pte_wrprotect(pte);
77}
78
79static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
80					   unsigned long addr, pte_t *ptep)
81{
82	ptep_set_wrprotect(mm, addr, ptep);
83}
84
85static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
86					     unsigned long addr, pte_t *ptep,
87					     pte_t pte, int dirty)
88{
89	return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
90}
91
92static inline pte_t huge_ptep_get(pte_t *ptep)
93{
94	return *ptep;
95}
96
97static inline void arch_clear_hugepage_flags(struct page *page)
98{
99}
100
101#ifdef CONFIG_HUGETLB_SUPER_PAGES
102static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
103				       struct page *page, int writable)
104{
105	size_t pagesize = huge_page_size(hstate_vma(vma));
106	if (pagesize != PUD_SIZE && pagesize != PMD_SIZE)
107		entry = pte_mksuper(entry);
108	return entry;
109}
110#define arch_make_huge_pte arch_make_huge_pte
111
112/* Sizes to scale up page size for PTEs with HV_PTE_SUPER bit. */
113enum {
114	HUGE_SHIFT_PGDIR = 0,
115	HUGE_SHIFT_PMD = 1,
116	HUGE_SHIFT_PAGE = 2,
117	HUGE_SHIFT_ENTRIES
118};
119extern int huge_shift[HUGE_SHIFT_ENTRIES];
120#endif
121
122#endif /* _ASM_TILE_HUGETLB_H */
123