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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#ifndef _ASM_PGALLOC_H
6#define _ASM_PGALLOC_H
7
8#include <linux/mm.h>
9#include <linux/sched.h>
10
11#define __HAVE_ARCH_PMD_ALLOC_ONE
12#define __HAVE_ARCH_PUD_ALLOC_ONE
13#define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
14#include <asm-generic/pgalloc.h>
15
16static inline void pmd_populate_kernel(struct mm_struct *mm,
17 pmd_t *pmd, pte_t *pte)
18{
19 set_pmd(pmd, __pmd((unsigned long)pte));
20}
21
22static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t pte)
23{
24 set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
25}
26
27#ifndef __PAGETABLE_PMD_FOLDED
28
29static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
30{
31 set_pud(pud, __pud((unsigned long)pmd));
32}
33#endif
34
35#ifndef __PAGETABLE_PUD_FOLDED
36
37static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
38{
39 set_p4d(p4d, __p4d((unsigned long)pud));
40}
41
42#endif /* __PAGETABLE_PUD_FOLDED */
43
44extern void pagetable_init(void);
45
46extern pgd_t *pgd_alloc(struct mm_struct *mm);
47
48static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
49{
50 pte_t *pte = __pte_alloc_one_kernel(mm);
51
52 if (pte)
53 kernel_pte_init(pte);
54
55 return pte;
56}
57
58#define __pte_free_tlb(tlb, pte, address) \
59do { \
60 pagetable_pte_dtor(page_ptdesc(pte)); \
61 tlb_remove_page_ptdesc((tlb), page_ptdesc(pte)); \
62} while (0)
63
64#ifndef __PAGETABLE_PMD_FOLDED
65
66static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
67{
68 pmd_t *pmd;
69 struct ptdesc *ptdesc;
70
71 ptdesc = pagetable_alloc(GFP_KERNEL_ACCOUNT, 0);
72 if (!ptdesc)
73 return NULL;
74
75 if (!pagetable_pmd_ctor(ptdesc)) {
76 pagetable_free(ptdesc);
77 return NULL;
78 }
79
80 pmd = ptdesc_address(ptdesc);
81 pmd_init(pmd);
82 return pmd;
83}
84
85#define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x)
86
87#endif
88
89#ifndef __PAGETABLE_PUD_FOLDED
90
91static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
92{
93 pud_t *pud;
94 struct ptdesc *ptdesc = pagetable_alloc(GFP_KERNEL & ~__GFP_HIGHMEM, 0);
95
96 if (!ptdesc)
97 return NULL;
98 pagetable_pud_ctor(ptdesc);
99 pud = ptdesc_address(ptdesc);
100
101 pud_init(pud);
102 return pud;
103}
104
105#define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x)
106
107#endif /* __PAGETABLE_PUD_FOLDED */
108
109extern pte_t * __init populate_kernel_pte(unsigned long addr);
110#endif /* _ASM_PGALLOC_H */