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Linux kernel mirror (for testing)
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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#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
20static inline pte_t pmd_pte(pmd_t pmd)
21{
22 return __pte(pmd_val(pmd));
23}
24
25static 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
47static 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
56static 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
62extern 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
66extern 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