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4f76cd38 JF |
1 | #ifndef _ASM_X86_PGALLOC_H |
2 | #define _ASM_X86_PGALLOC_H | |
3 | ||
4 | #include <linux/threads.h> | |
5 | #include <linux/mm.h> /* for struct page */ | |
6 | #include <linux/pagemap.h> | |
7 | ||
1d262d3a JF |
8 | #ifdef CONFIG_PARAVIRT |
9 | #include <asm/paravirt.h> | |
10 | #else | |
6944a9c8 JF |
11 | #define paravirt_alloc_pte(mm, pfn) do { } while (0) |
12 | #define paravirt_alloc_pmd(mm, pfn) do { } while (0) | |
13 | #define paravirt_alloc_pmd_clone(pfn, clonepfn, start, count) do { } while (0) | |
2761fa09 | 14 | #define paravirt_alloc_pud(mm, pfn) do { } while (0) |
6944a9c8 JF |
15 | #define paravirt_release_pte(pfn) do { } while (0) |
16 | #define paravirt_release_pmd(pfn) do { } while (0) | |
2761fa09 | 17 | #define paravirt_release_pud(pfn) do { } while (0) |
1d262d3a JF |
18 | #endif |
19 | ||
4f76cd38 JF |
20 | /* |
21 | * Allocate and free page tables. | |
22 | */ | |
23 | extern pgd_t *pgd_alloc(struct mm_struct *); | |
24 | extern void pgd_free(struct mm_struct *mm, pgd_t *pgd); | |
25 | ||
26 | extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long); | |
27 | extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long); | |
28 | ||
397f687a JF |
29 | /* Should really implement gc for free page table pages. This could be |
30 | done with a reference count in struct page. */ | |
31 | ||
32 | static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) | |
33 | { | |
34 | BUG_ON((unsigned long)pte & (PAGE_SIZE-1)); | |
35 | free_page((unsigned long)pte); | |
36 | } | |
37 | ||
38 | static inline void pte_free(struct mm_struct *mm, struct page *pte) | |
39 | { | |
40 | __free_page(pte); | |
41 | } | |
42 | ||
43 | extern void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte); | |
44 | ||
170fdff7 JF |
45 | static inline void pmd_populate_kernel(struct mm_struct *mm, |
46 | pmd_t *pmd, pte_t *pte) | |
47 | { | |
6944a9c8 | 48 | paravirt_alloc_pte(mm, __pa(pte) >> PAGE_SHIFT); |
170fdff7 JF |
49 | set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE)); |
50 | } | |
51 | ||
52 | static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, | |
53 | struct page *pte) | |
54 | { | |
55 | unsigned long pfn = page_to_pfn(pte); | |
56 | ||
6944a9c8 | 57 | paravirt_alloc_pte(mm, pfn); |
170fdff7 JF |
58 | set_pmd(pmd, __pmd(((pteval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE)); |
59 | } | |
60 | ||
61 | #define pmd_pgtable(pmd) pmd_page(pmd) | |
62 | ||
63 | #if PAGETABLE_LEVELS > 2 | |
64 | static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) | |
65 | { | |
66 | return (pmd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); | |
67 | } | |
68 | ||
69 | static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) | |
70 | { | |
71 | BUG_ON((unsigned long)pmd & (PAGE_SIZE-1)); | |
72 | free_page((unsigned long)pmd); | |
73 | } | |
74 | ||
75 | extern void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd); | |
170fdff7 | 76 | |
5a5f8f42 JF |
77 | #ifdef CONFIG_X86_PAE |
78 | extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd); | |
79 | #else /* !CONFIG_X86_PAE */ | |
80 | static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) | |
81 | { | |
6944a9c8 | 82 | paravirt_alloc_pmd(mm, __pa(pmd) >> PAGE_SHIFT); |
5a5f8f42 JF |
83 | set_pud(pud, __pud(_PAGE_TABLE | __pa(pmd))); |
84 | } | |
85 | #endif /* CONFIG_X86_PAE */ | |
86 | ||
87 | #if PAGETABLE_LEVELS > 3 | |
88 | static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud) | |
89 | { | |
2761fa09 | 90 | paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT); |
5a5f8f42 JF |
91 | set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pud))); |
92 | } | |
93 | ||
94 | static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) | |
95 | { | |
96 | return (pud_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); | |
97 | } | |
98 | ||
99 | static inline void pud_free(struct mm_struct *mm, pud_t *pud) | |
100 | { | |
101 | BUG_ON((unsigned long)pud & (PAGE_SIZE-1)); | |
102 | free_page((unsigned long)pud); | |
103 | } | |
104 | ||
105 | extern void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud); | |
106 | #endif /* PAGETABLE_LEVELS > 3 */ | |
107 | #endif /* PAGETABLE_LEVELS > 2 */ | |
4f76cd38 JF |
108 | |
109 | #endif /* _ASM_X86_PGALLOC_H */ |