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#include <asm-generic/pgalloc.h>
14
15static inline void pmd_populate_kernel(struct mm_struct *mm,
16 pmd_t *pmd, pte_t *pte)
17{
18 set_pmd(pmd, __pmd((unsigned long)pte));
19}
20
21static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t pte)
22{
23 set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
24}
25
26#ifndef __PAGETABLE_PMD_FOLDED
27
28static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
29{
30 set_pud(pud, __pud((unsigned long)pmd));
31}
32#endif
33
34#ifndef __PAGETABLE_PUD_FOLDED
35
36static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
37{
38 set_p4d(p4d, __p4d((unsigned long)pud));
39}
40
41#endif /* __PAGETABLE_PUD_FOLDED */
42
43extern void pagetable_init(void);
44
45extern pgd_t *pgd_alloc(struct mm_struct *mm);
46
47#define __pte_free_tlb(tlb, pte, address) \
48do { \
49 pgtable_pte_page_dtor(pte); \
50 tlb_remove_page((tlb), pte); \
51} while (0)
52
53#ifndef __PAGETABLE_PMD_FOLDED
54
55static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
56{
57 pmd_t *pmd;
58 struct page *pg;
59
60 pg = alloc_page(GFP_KERNEL_ACCOUNT);
61 if (!pg)
62 return NULL;
63
64 if (!pgtable_pmd_page_ctor(pg)) {
65 __free_page(pg);
66 return NULL;
67 }
68
69 pmd = (pmd_t *)page_address(pg);
70 pmd_init(pmd);
71 return pmd;
72}
73
74#define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x)
75
76#endif
77
78#ifndef __PAGETABLE_PUD_FOLDED
79
80static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
81{
82 pud_t *pud;
83
84 pud = (pud_t *) __get_free_page(GFP_KERNEL);
85 if (pud)
86 pud_init(pud);
87 return pud;
88}
89
90#define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x)
91
92#endif /* __PAGETABLE_PUD_FOLDED */
93
94#endif /* _ASM_PGALLOC_H */