Merge branch 'pm-domains'
[deliverable/linux.git] / arch / arc / include / asm / hugepage.h
1 /*
2 * Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8
9
10 #ifndef _ASM_ARC_HUGEPAGE_H
11 #define _ASM_ARC_HUGEPAGE_H
12
13 #include <linux/types.h>
14 #include <asm-generic/pgtable-nopmd.h>
15
16 static inline pte_t pmd_pte(pmd_t pmd)
17 {
18 return __pte(pmd_val(pmd));
19 }
20
21 static inline pmd_t pte_pmd(pte_t pte)
22 {
23 return __pmd(pte_val(pte));
24 }
25
26 #define pmd_wrprotect(pmd) pte_pmd(pte_wrprotect(pmd_pte(pmd)))
27 #define pmd_mkwrite(pmd) pte_pmd(pte_mkwrite(pmd_pte(pmd)))
28 #define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd)))
29 #define pmd_mkold(pmd) pte_pmd(pte_mkold(pmd_pte(pmd)))
30 #define pmd_mkyoung(pmd) pte_pmd(pte_mkyoung(pmd_pte(pmd)))
31 #define pmd_mkhuge(pmd) pte_pmd(pte_mkhuge(pmd_pte(pmd)))
32 #define pmd_mknotpresent(pmd) pte_pmd(pte_mknotpresent(pmd_pte(pmd)))
33 #define pmd_mksplitting(pmd) pte_pmd(pte_mkspecial(pmd_pte(pmd)))
34 #define pmd_mkclean(pmd) pte_pmd(pte_mkclean(pmd_pte(pmd)))
35
36 #define pmd_write(pmd) pte_write(pmd_pte(pmd))
37 #define pmd_young(pmd) pte_young(pmd_pte(pmd))
38 #define pmd_pfn(pmd) pte_pfn(pmd_pte(pmd))
39 #define pmd_dirty(pmd) pte_dirty(pmd_pte(pmd))
40 #define pmd_special(pmd) pte_special(pmd_pte(pmd))
41
42 #define mk_pmd(page, prot) pte_pmd(mk_pte(page, prot))
43
44 #define pmd_trans_huge(pmd) (pmd_val(pmd) & _PAGE_HW_SZ)
45 #define pmd_trans_splitting(pmd) (pmd_trans_huge(pmd) && pmd_special(pmd))
46
47 #define pfn_pmd(pfn, prot) (__pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot)))
48
49 static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
50 {
51 /*
52 * open-coded pte_modify() with additional retaining of HW_SZ bit
53 * so that pmd_trans_huge() remains true for this PMD
54 */
55 return __pmd((pmd_val(pmd) & (_PAGE_CHG_MASK | _PAGE_HW_SZ)) | pgprot_val(newprot));
56 }
57
58 static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
59 pmd_t *pmdp, pmd_t pmd)
60 {
61 *pmdp = pmd;
62 }
63
64 extern void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
65 pmd_t *pmd);
66
67 #define has_transparent_hugepage() 1
68
69 /* Generic variants assume pgtable_t is struct page *, hence need for these */
70 #define __HAVE_ARCH_PGTABLE_DEPOSIT
71 extern void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
72 pgtable_t pgtable);
73
74 #define __HAVE_ARCH_PGTABLE_WITHDRAW
75 extern pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
76
77 #define __HAVE_ARCH_FLUSH_PMD_TLB_RANGE
78 extern void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
79 unsigned long end);
80
81 #endif
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