1 /*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2008, 2009 Cavium Networks, Inc.
7 */
8
9 #ifndef __ASM_HUGETLB_H
10 #define __ASM_HUGETLB_H
11
12 #include <asm/page.h>
13
14 #define __HAVE_ARCH_PREPARE_HUGEPAGE_RANGE
prepare_hugepage_range(struct file * file,unsigned long addr,unsigned long len)15 static inline int prepare_hugepage_range(struct file *file,
16 unsigned long addr,
17 unsigned long len)
18 {
19 unsigned long task_size = STACK_TOP;
20 struct hstate *h = hstate_file(file);
21
22 if (len & ~huge_page_mask(h))
23 return -EINVAL;
24 if (addr & ~huge_page_mask(h))
25 return -EINVAL;
26 if (len > task_size)
27 return -ENOMEM;
28 if (task_size - len < addr)
29 return -EINVAL;
30 return 0;
31 }
32
33 #define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
huge_ptep_get_and_clear(struct mm_struct * mm,unsigned long addr,pte_t * ptep)34 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
35 unsigned long addr, pte_t *ptep)
36 {
37 pte_t clear;
38 pte_t pte = *ptep;
39
40 pte_val(clear) = (unsigned long)invalid_pte_table;
41 set_pte_at(mm, addr, ptep, clear);
42 return pte;
43 }
44
45 #define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
huge_ptep_clear_flush(struct vm_area_struct * vma,unsigned long addr,pte_t * ptep)46 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
47 unsigned long addr, pte_t *ptep)
48 {
49 flush_tlb_page(vma, addr & huge_page_mask(hstate_vma(vma)));
50 }
51
52 #define __HAVE_ARCH_HUGE_PTE_NONE
huge_pte_none(pte_t pte)53 static inline int huge_pte_none(pte_t pte)
54 {
55 unsigned long val = pte_val(pte) & ~_PAGE_GLOBAL;
56 return !val || (val == (unsigned long)invalid_pte_table);
57 }
58
59 #define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
huge_ptep_set_access_flags(struct vm_area_struct * vma,unsigned long addr,pte_t * ptep,pte_t pte,int dirty)60 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
61 unsigned long addr,
62 pte_t *ptep, pte_t pte,
63 int dirty)
64 {
65 int changed = !pte_same(*ptep, pte);
66
67 if (changed) {
68 set_pte_at(vma->vm_mm, addr, ptep, pte);
69 /*
70 * There could be some standard sized pages in there,
71 * get them all.
72 */
73 flush_tlb_range(vma, addr, addr + HPAGE_SIZE);
74 }
75 return changed;
76 }
77
78 #include <asm-generic/hugetlb.h>
79
80 #endif /* __ASM_HUGETLB_H */
81
