Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
4 * Copyright 2003 PathScale, Inc.
5 * Derived from include/asm-i386/pgalloc.h and include/asm-i386/pgtable.h
6 */
7
8#ifndef __UM_PGALLOC_H
9#define __UM_PGALLOC_H
10
11#include <linux/mm.h>
12
13#include <asm-generic/pgalloc.h> /* for pte_{alloc,free}_one */
14
15#define pmd_populate_kernel(mm, pmd, pte) \
16 set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) __pa(pte)))
17
18#define pmd_populate(mm, pmd, pte) \
19 set_pmd(pmd, __pmd(_PAGE_TABLE + \
20 ((unsigned long long)page_to_pfn(pte) << \
21 (unsigned long long) PAGE_SHIFT)))
22#define pmd_pgtable(pmd) pmd_page(pmd)
23
24/*
25 * Allocate and free page tables.
26 */
27extern pgd_t *pgd_alloc(struct mm_struct *);
28extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
29
30#define __pte_free_tlb(tlb,pte, address) \
31do { \
32 pgtable_pte_page_dtor(pte); \
33 tlb_remove_page((tlb),(pte)); \
34} while (0)
35
36#ifdef CONFIG_3_LEVEL_PGTABLES
37
38static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
39{
40 free_page((unsigned long)pmd);
41}
42
43#define __pmd_free_tlb(tlb,x, address) tlb_remove_page((tlb),virt_to_page(x))
44#endif
45
46#endif
47