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1965aae3 PA |
1 | #ifndef _ASM_X86_PGALLOC_H |
2 | #define _ASM_X86_PGALLOC_H | |
4f76cd38 JF |
3 | |
4 | #include <linux/threads.h> | |
5 | #include <linux/mm.h> /* for struct page */ | |
6 | #include <linux/pagemap.h> | |
7 | ||
eba0045f JF |
8 | static inline int __paravirt_pgd_alloc(struct mm_struct *mm) { return 0; } |
9 | ||
1d262d3a JF |
10 | #ifdef CONFIG_PARAVIRT |
11 | #include <asm/paravirt.h> | |
12 | #else | |
eba0045f JF |
13 | #define paravirt_pgd_alloc(mm) __paravirt_pgd_alloc(mm) |
14 | static inline void paravirt_pgd_free(struct mm_struct *mm, pgd_t *pgd) {} | |
286cd494 JF |
15 | static inline void paravirt_alloc_pte(struct mm_struct *mm, unsigned long pfn) {} |
16 | static inline void paravirt_alloc_pmd(struct mm_struct *mm, unsigned long pfn) {} | |
17 | static inline void paravirt_alloc_pmd_clone(unsigned long pfn, unsigned long clonepfn, | |
18 | unsigned long start, unsigned long count) {} | |
19 | static inline void paravirt_alloc_pud(struct mm_struct *mm, unsigned long pfn) {} | |
20 | static inline void paravirt_release_pte(unsigned long pfn) {} | |
21 | static inline void paravirt_release_pmd(unsigned long pfn) {} | |
22 | static inline void paravirt_release_pud(unsigned long pfn) {} | |
1d262d3a JF |
23 | #endif |
24 | ||
4f76cd38 JF |
25 | /* |
26 | * Allocate and free page tables. | |
27 | */ | |
28 | extern pgd_t *pgd_alloc(struct mm_struct *); | |
29 | extern void pgd_free(struct mm_struct *mm, pgd_t *pgd); | |
30 | ||
31 | extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long); | |
32 | extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long); | |
33 | ||
397f687a JF |
34 | /* Should really implement gc for free page table pages. This could be |
35 | done with a reference count in struct page. */ | |
36 | ||
37 | static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) | |
38 | { | |
39 | BUG_ON((unsigned long)pte & (PAGE_SIZE-1)); | |
40 | free_page((unsigned long)pte); | |
41 | } | |
42 | ||
43 | static inline void pte_free(struct mm_struct *mm, struct page *pte) | |
44 | { | |
42ef73fe | 45 | pgtable_page_dtor(pte); |
397f687a JF |
46 | __free_page(pte); |
47 | } | |
48 | ||
49 | extern void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte); | |
50 | ||
170fdff7 JF |
51 | static inline void pmd_populate_kernel(struct mm_struct *mm, |
52 | pmd_t *pmd, pte_t *pte) | |
53 | { | |
6944a9c8 | 54 | paravirt_alloc_pte(mm, __pa(pte) >> PAGE_SHIFT); |
170fdff7 JF |
55 | set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE)); |
56 | } | |
57 | ||
58 | static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, | |
59 | struct page *pte) | |
60 | { | |
61 | unsigned long pfn = page_to_pfn(pte); | |
62 | ||
6944a9c8 | 63 | paravirt_alloc_pte(mm, pfn); |
170fdff7 JF |
64 | set_pmd(pmd, __pmd(((pteval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE)); |
65 | } | |
66 | ||
67 | #define pmd_pgtable(pmd) pmd_page(pmd) | |
68 | ||
69 | #if PAGETABLE_LEVELS > 2 | |
70 | static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) | |
71 | { | |
72 | return (pmd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); | |
73 | } | |
74 | ||
75 | static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) | |
76 | { | |
77 | BUG_ON((unsigned long)pmd & (PAGE_SIZE-1)); | |
78 | free_page((unsigned long)pmd); | |
79 | } | |
80 | ||
81 | extern void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd); | |
170fdff7 | 82 | |
5a5f8f42 JF |
83 | #ifdef CONFIG_X86_PAE |
84 | extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd); | |
85 | #else /* !CONFIG_X86_PAE */ | |
86 | static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) | |
87 | { | |
6944a9c8 | 88 | paravirt_alloc_pmd(mm, __pa(pmd) >> PAGE_SHIFT); |
5a5f8f42 JF |
89 | set_pud(pud, __pud(_PAGE_TABLE | __pa(pmd))); |
90 | } | |
91 | #endif /* CONFIG_X86_PAE */ | |
92 | ||
93 | #if PAGETABLE_LEVELS > 3 | |
94 | static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud) | |
95 | { | |
2761fa09 | 96 | paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT); |
5a5f8f42 JF |
97 | set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pud))); |
98 | } | |
99 | ||
100 | static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) | |
101 | { | |
102 | return (pud_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); | |
103 | } | |
104 | ||
105 | static inline void pud_free(struct mm_struct *mm, pud_t *pud) | |
106 | { | |
107 | BUG_ON((unsigned long)pud & (PAGE_SIZE-1)); | |
108 | free_page((unsigned long)pud); | |
109 | } | |
110 | ||
111 | extern void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud); | |
112 | #endif /* PAGETABLE_LEVELS > 3 */ | |
113 | #endif /* PAGETABLE_LEVELS > 2 */ | |
4f76cd38 | 114 | |
1965aae3 | 115 | #endif /* _ASM_X86_PGALLOC_H */ |