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>
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
23/*
24 * Allocate and free page tables.
25 */
26extern pgd_t *pgd_alloc(struct mm_struct *);
27
28#define __pte_free_tlb(tlb, pte, address)	\
29	tlb_remove_ptdesc((tlb), page_ptdesc(pte))
30
31#if CONFIG_PGTABLE_LEVELS > 2
32
33#define __pmd_free_tlb(tlb, pmd, address)	\
34	tlb_remove_ptdesc((tlb), virt_to_ptdesc(pmd))
35
36#if CONFIG_PGTABLE_LEVELS > 3
37
38#define __pud_free_tlb(tlb, pud, address)	\
39	tlb_remove_ptdesc((tlb), virt_to_ptdesc(pud))
40
41#endif
42#endif
43
44#endif
45