hugetlb.h

 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 */