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 pmd_trans_huge(pmd)	(pmd_val(pmd) & _PAGE_HW_SZ)
44 
45 #define pfn_pmd(pfn, prot)	(__pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot)))
46 
47 static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
48 {
49         /*
50          * open-coded pte_modify() with additional retaining of HW_SZ bit
51          * so that pmd_trans_huge() remains true for this PMD
52          */
53         return __pmd((pmd_val(pmd) & (_PAGE_CHG_MASK | _PAGE_HW_SZ)) | pgprot_val(newprot));
54 }
55 
56 static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
57 			      pmd_t *pmdp, pmd_t pmd)
58 {
59 	*pmdp = pmd;
60 }
61 
62 extern void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
63 				 pmd_t *pmd);
64 
65 #define __HAVE_ARCH_FLUSH_PMD_TLB_RANGE
66 extern void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
67 				unsigned long end);
68 
69 /* We don't have hardware dirty/accessed bits, generic_pmdp_establish is fine.*/
70 #define pmdp_establish generic_pmdp_establish
71 
72 #endif
73