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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#define __ARCH_USE_5LEVEL_HACK
12#include <asm-generic/pgtable-nopmd.h>
13
14static inline pte_t pmd_pte(pmd_t pmd)
15{
16 return __pte(pmd_val(pmd));
17}
18
19static inline pmd_t pte_pmd(pte_t pte)
20{
21 return __pmd(pte_val(pte));
22}
23
24#define pmd_wrprotect(pmd) pte_pmd(pte_wrprotect(pmd_pte(pmd)))
25#define pmd_mkwrite(pmd) pte_pmd(pte_mkwrite(pmd_pte(pmd)))
26#define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd)))
27#define pmd_mkold(pmd) pte_pmd(pte_mkold(pmd_pte(pmd)))
28#define pmd_mkyoung(pmd) pte_pmd(pte_mkyoung(pmd_pte(pmd)))
29#define pmd_mkhuge(pmd) pte_pmd(pte_mkhuge(pmd_pte(pmd)))
30#define pmd_mknotpresent(pmd) pte_pmd(pte_mknotpresent(pmd_pte(pmd)))
31#define pmd_mkclean(pmd) pte_pmd(pte_mkclean(pmd_pte(pmd)))
32
33#define pmd_write(pmd) pte_write(pmd_pte(pmd))
34#define pmd_young(pmd) pte_young(pmd_pte(pmd))
35#define pmd_pfn(pmd) pte_pfn(pmd_pte(pmd))
36#define pmd_dirty(pmd) pte_dirty(pmd_pte(pmd))
37
38#define mk_pmd(page, prot) pte_pmd(mk_pte(page, prot))
39
40#define pmd_trans_huge(pmd) (pmd_val(pmd) & _PAGE_HW_SZ)
41
42#define pfn_pmd(pfn, prot) (__pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot)))
43
44static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
45{
46 /*
47 * open-coded pte_modify() with additional retaining of HW_SZ bit
48 * so that pmd_trans_huge() remains true for this PMD
49 */
50 return __pmd((pmd_val(pmd) & (_PAGE_CHG_MASK | _PAGE_HW_SZ)) | pgprot_val(newprot));
51}
52
53static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
54 pmd_t *pmdp, pmd_t pmd)
55{
56 *pmdp = pmd;
57}
58
59extern void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
60 pmd_t *pmd);
61
62/* Generic variants assume pgtable_t is struct page *, hence need for these */
63#define __HAVE_ARCH_PGTABLE_DEPOSIT
64extern void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
65 pgtable_t pgtable);
66
67#define __HAVE_ARCH_PGTABLE_WITHDRAW
68extern pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
69
70#define __HAVE_ARCH_FLUSH_PMD_TLB_RANGE
71extern void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
72 unsigned long end);
73
74/* We don't have hardware dirty/accessed bits, generic_pmdp_establish is fine.*/
75#define pmdp_establish generic_pmdp_establish
76
77#endif