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 #include "asm/fixmap.h"
13
14 #define pmd_populate_kernel(mm, pmd, pte) \
15 set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) __pa(pte)))
16
17 #define pmd_populate(mm, pmd, pte) \
18 set_pmd(pmd, __pmd(_PAGE_TABLE + \
19 ((unsigned long long)page_to_pfn(pte) << \
20 (unsigned long long) PAGE_SHIFT)))
21 #define pmd_pgtable(pmd) pmd_page(pmd)
22
23 /*
24 * Allocate and free page tables.
25 */
26 extern pgd_t *pgd_alloc(struct mm_struct *);
27 extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
28
29 extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
30 extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long);
31
32 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
33 {
34 free_page((unsigned long) pte);
35 }
36
37 static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
38 {
39 pgtable_page_dtor(pte);
40 __free_page(pte);
41 }
42
43 #define __pte_free_tlb(tlb,pte, address) \
44 do { \
45 pgtable_page_dtor(pte); \
46 tlb_remove_page((tlb),(pte)); \
47 } while (0)
48
49 #ifdef CONFIG_3_LEVEL_PGTABLES
50
51 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
52 {
53 free_page((unsigned long)pmd);
54 }
55
56 #define __pmd_free_tlb(tlb,x, address) tlb_remove_page((tlb),virt_to_page(x))
57 #endif
58
59 #define check_pgt_cache() do { } while (0)
60
61 #endif
62
63
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