Commit | Line | Data |
---|---|---|
9a8fd558 | 1 | /* |
6656920b | 2 | * include/asm-xtensa/pgalloc.h |
9a8fd558 CZ |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
6656920b | 8 | * Copyright (C) 2001-2007 Tensilica Inc. |
9a8fd558 CZ |
9 | */ |
10 | ||
11 | #ifndef _XTENSA_PGALLOC_H | |
12 | #define _XTENSA_PGALLOC_H | |
13 | ||
14 | #ifdef __KERNEL__ | |
15 | ||
9a8fd558 | 16 | #include <linux/highmem.h> |
9a8fd558 CZ |
17 | |
18 | /* | |
19 | * Allocating and freeing a pmd is trivial: the 1-entry pmd is | |
20 | * inside the pgd, so has no extra memory associated with it. | |
21 | */ | |
22 | ||
6656920b CZ |
23 | #define pmd_populate_kernel(mm, pmdp, ptep) \ |
24 | (pmd_val(*(pmdp)) = ((unsigned long)ptep)) | |
25 | #define pmd_populate(mm, pmdp, page) \ | |
26 | (pmd_val(*(pmdp)) = ((unsigned long)page_to_virt(page))) | |
2f569afd | 27 | #define pmd_pgtable(pmd) pmd_page(pmd) |
9a8fd558 | 28 | |
6656920b CZ |
29 | static inline pgd_t* |
30 | pgd_alloc(struct mm_struct *mm) | |
9a8fd558 | 31 | { |
6656920b | 32 | return (pgd_t*) __get_free_pages(GFP_KERNEL | __GFP_ZERO, PGD_ORDER); |
9a8fd558 CZ |
33 | } |
34 | ||
5e541973 | 35 | static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) |
9a8fd558 | 36 | { |
6656920b | 37 | free_page((unsigned long)pgd); |
9a8fd558 CZ |
38 | } |
39 | ||
6656920b | 40 | /* Use a slab cache for the pte pages (see also sparc64 implementation) */ |
9a8fd558 | 41 | |
6656920b | 42 | extern struct kmem_cache *pgtable_cache; |
9a8fd558 | 43 | |
6656920b CZ |
44 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, |
45 | unsigned long address) | |
9a8fd558 | 46 | { |
6656920b CZ |
47 | return kmem_cache_alloc(pgtable_cache, GFP_KERNEL|__GFP_REPEAT); |
48 | } | |
9a8fd558 | 49 | |
e584d85f | 50 | static inline pgtable_t pte_alloc_one(struct mm_struct *mm, |
2f569afd | 51 | unsigned long addr) |
6656920b | 52 | { |
2f569afd MS |
53 | struct page *page; |
54 | ||
55 | page = virt_to_page(pte_alloc_one_kernel(mm, addr)); | |
56 | pgtable_page_ctor(page); | |
57 | return page; | |
9a8fd558 CZ |
58 | } |
59 | ||
5e541973 | 60 | static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) |
6656920b CZ |
61 | { |
62 | kmem_cache_free(pgtable_cache, pte); | |
63 | } | |
9a8fd558 | 64 | |
2f569afd | 65 | static inline void pte_free(struct mm_struct *mm, pgtable_t pte) |
6656920b | 66 | { |
2f569afd MS |
67 | pgtable_page_dtor(pte); |
68 | kmem_cache_free(pgtable_cache, page_address(pte)); | |
6656920b | 69 | } |
2f569afd | 70 | #define pmd_pgtable(pmd) pmd_page(pmd) |
9a8fd558 CZ |
71 | |
72 | #endif /* __KERNEL__ */ | |
73 | #endif /* _XTENSA_PGALLOC_H */ |