1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
4 */
5
6
7 #ifndef _ASM_ARC_HUGEPAGE_H
8 #define _ASM_ARC_HUGEPAGE_H
9
10 #include <linux/types.h>
11 #include <asm-generic/pgtable-nopmd.h>
12
13 /*
14 * Hugetlb definitions.
15 */
16 #define HPAGE_SHIFT PMD_SHIFT
17 #define HPAGE_SIZE (_AC(1, UL) << HPAGE_SHIFT)
18 #define HPAGE_MASK (~(HPAGE_SIZE - 1))
19
20 static inline pte_t pmd_pte(pmd_t pmd)
21 {
22 return __pte(pmd_val(pmd));
23 }
24
25 static inline pmd_t pte_pmd(pte_t pte)
26 {
27 return __pmd(pte_val(pte));
28 }
29
30 #define pmd_wrprotect(pmd) pte_pmd(pte_wrprotect(pmd_pte(pmd)))
31 #define pmd_mkwrite_novma(pmd) pte_pmd(pte_mkwrite_novma(pmd_pte(pmd)))
32 #define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd)))
33 #define pmd_mkold(pmd) pte_pmd(pte_mkold(pmd_pte(pmd)))
34 #define pmd_mkyoung(pmd) pte_pmd(pte_mkyoung(pmd_pte(pmd)))
35 #define pmd_mkhuge(pmd) pte_pmd(pte_mkhuge(pmd_pte(pmd)))
36 #define pmd_mkinvalid(pmd) pte_pmd(pte_mknotpresent(pmd_pte(pmd)))
37 #define pmd_mkclean(pmd) pte_pmd(pte_mkclean(pmd_pte(pmd)))
38
39 #define pmd_write(pmd) pte_write(pmd_pte(pmd))
40 #define pmd_young(pmd) pte_young(pmd_pte(pmd))
41 #define pmd_dirty(pmd) pte_dirty(pmd_pte(pmd))
42
43 #define mk_pmd(page, prot) pte_pmd(mk_pte(page, prot))
44
45 #define pmd_trans_huge(pmd) (pmd_val(pmd) & _PAGE_HW_SZ)
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 __HAVE_ARCH_FLUSH_PMD_TLB_RANGE
68 extern void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
69 unsigned long end);
70
71 /* We don't have hardware dirty/accessed bits, generic_pmdp_establish is fine.*/
72 #define pmdp_establish generic_pmdp_establish
73
74 #endif
75
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