/arch/um/include/asm/pgalloc.h

 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