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