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 */
25 extern pgd_t *pgd_alloc(struct mm_struct *);
26 extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
27
28 extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
29 extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long);
30
pte_free_kernel(struct mm_struct * mm,pte_t * pte)31 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
32 {
33 free_page((unsigned long) pte);
34 }
35
pte_free(struct mm_struct * mm,pgtable_t pte)36 static 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) \
43 do { \
44 pgtable_page_dtor(pte); \
45 tlb_remove_page((tlb),(pte)); \
46 } while (0)
47
48 #ifdef CONFIG_3_LEVEL_PGTABLES
49
pmd_free(struct mm_struct * mm,pmd_t * pmd)50 static 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