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Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
4 */
5
6#ifndef __ASM_HUGETLB_H
7#define __ASM_HUGETLB_H
8
9#include <asm/page.h>
10
11uint64_t pmd_to_entrylo(unsigned long pmd_val);
12
13#define __HAVE_ARCH_HUGE_PTE_CLEAR
14static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
15 pte_t *ptep, unsigned long sz)
16{
17 pte_t clear;
18
19 pte_val(clear) = (unsigned long)invalid_pte_table;
20 set_pte_at(mm, addr, ptep, clear);
21}
22
23#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
24static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
25 unsigned long addr, pte_t *ptep,
26 unsigned long sz)
27{
28 pte_t clear;
29 pte_t pte = ptep_get(ptep);
30
31 pte_val(clear) = (unsigned long)invalid_pte_table;
32 set_pte_at(mm, addr, ptep, clear);
33 return pte;
34}
35
36#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
37static inline pte_t huge_ptep_clear_flush(struct vm_area_struct *vma,
38 unsigned long addr, pte_t *ptep)
39{
40 pte_t pte;
41 unsigned long sz = huge_page_size(hstate_vma(vma));
42
43 pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep, sz);
44 flush_tlb_page(vma, addr);
45 return pte;
46}
47
48#define __HAVE_ARCH_HUGE_PTE_NONE
49static inline int huge_pte_none(pte_t pte)
50{
51 unsigned long val = pte_val(pte) & ~_PAGE_GLOBAL;
52 return !val || (val == (unsigned long)invalid_pte_table);
53}
54
55#define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
56static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
57 unsigned long addr,
58 pte_t *ptep, pte_t pte,
59 int dirty)
60{
61 int changed = !pte_same(ptep_get(ptep), pte);
62
63 if (changed) {
64 set_pte_at(vma->vm_mm, addr, ptep, pte);
65 /*
66 * There could be some standard sized pages in there,
67 * get them all.
68 */
69 flush_tlb_range(vma, addr, addr + HPAGE_SIZE);
70 }
71 return changed;
72}
73
74#include <asm-generic/hugetlb.h>
75
76#endif /* __ASM_HUGETLB_H */