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