1/*
2 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
3 * Copyright 2003 PathScale, Inc.
4 * Derived from include/asm-i386/pgalloc.h and include/asm-i386/pgtable.h
5 * Licensed under the GPL
6 */
7
8#ifndef __UM_PGALLOC_H
9#define __UM_PGALLOC_H
10
11#include <linux/mm.h>
12
13#define pmd_populate_kernel(mm, pmd, pte) \
14	set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) __pa(pte)))
15
16#define pmd_populate(mm, pmd, pte) 				\
17	set_pmd(pmd, __pmd(_PAGE_TABLE +			\
18		((unsigned long long)page_to_pfn(pte) <<	\
19			(unsigned long long) PAGE_SHIFT)))
20#define pmd_pgtable(pmd) pmd_page(pmd)
21
22/*
23 * Allocate and free page tables.
24 */
25extern pgd_t *pgd_alloc(struct mm_struct *);
26extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
27
28extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
29extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long);
30
31static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
32{
33	free_page((unsigned long) pte);
34}
35
36static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
37{
38	pgtable_page_dtor(pte);
39	__free_page(pte);
40}
41
42#define __pte_free_tlb(tlb,pte, address)		\
43do {							\
44	pgtable_page_dtor(pte);				\
45	tlb_remove_page((tlb),(pte));			\
46} while (0)
47
48#ifdef CONFIG_3_LEVEL_PGTABLES
49
50static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
51{
52	free_page((unsigned long)pmd);
53}
54
55#define __pmd_free_tlb(tlb,x, address)   tlb_remove_page((tlb),virt_to_page(x))
56#endif
57
58#define check_pgt_cache()	do { } while (0)
59
60#endif
61
62