blob: 271de94c3810d9bbdb2c01bbfbb43f221b46ee24 [file] [log] [blame]
H. Peter Anvin1965aae2008-10-22 22:26:29 -07001#ifndef _ASM_X86_PGALLOC_H
2#define _ASM_X86_PGALLOC_H
Jeremy Fitzhardinge4f76cd32008-03-17 16:36:55 -07003
4#include <linux/threads.h>
5#include <linux/mm.h> /* for struct page */
6#include <linux/pagemap.h>
7
Jeremy Fitzhardingeeba00452008-06-25 00:19:12 -04008static inline int __paravirt_pgd_alloc(struct mm_struct *mm) { return 0; }
9
Jeremy Fitzhardinge1d262d32008-03-17 16:36:56 -070010#ifdef CONFIG_PARAVIRT
11#include <asm/paravirt.h>
12#else
Jeremy Fitzhardingeeba00452008-06-25 00:19:12 -040013#define paravirt_pgd_alloc(mm) __paravirt_pgd_alloc(mm)
14static inline void paravirt_pgd_free(struct mm_struct *mm, pgd_t *pgd) {}
Jeremy Fitzhardinge286cd492008-03-17 16:37:06 -070015static inline void paravirt_alloc_pte(struct mm_struct *mm, unsigned long pfn) {}
16static inline void paravirt_alloc_pmd(struct mm_struct *mm, unsigned long pfn) {}
17static inline void paravirt_alloc_pmd_clone(unsigned long pfn, unsigned long clonepfn,
18 unsigned long start, unsigned long count) {}
19static inline void paravirt_alloc_pud(struct mm_struct *mm, unsigned long pfn) {}
20static inline void paravirt_release_pte(unsigned long pfn) {}
21static inline void paravirt_release_pmd(unsigned long pfn) {}
22static inline void paravirt_release_pud(unsigned long pfn) {}
Jeremy Fitzhardinge1d262d32008-03-17 16:36:56 -070023#endif
24
Jeremy Fitzhardinge4f76cd32008-03-17 16:36:55 -070025/*
Ian Campbell14315592010-02-17 10:38:10 +000026 * Flags to use when allocating a user page table page.
27 */
28extern gfp_t __userpte_alloc_gfp;
29
30/*
Jeremy Fitzhardinge4f76cd32008-03-17 16:36:55 -070031 * Allocate and free page tables.
32 */
33extern pgd_t *pgd_alloc(struct mm_struct *);
34extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
35
36extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
37extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long);
38
Jeremy Fitzhardinge397f6872008-03-17 16:36:57 -070039/* Should really implement gc for free page table pages. This could be
40 done with a reference count in struct page. */
41
42static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
43{
44 BUG_ON((unsigned long)pte & (PAGE_SIZE-1));
45 free_page((unsigned long)pte);
46}
47
48static inline void pte_free(struct mm_struct *mm, struct page *pte)
49{
Peter Zijlstra42ef73f2009-01-23 17:37:49 +010050 pgtable_page_dtor(pte);
Jeremy Fitzhardinge397f6872008-03-17 16:36:57 -070051 __free_page(pte);
52}
53
Benjamin Herrenschmidt9e1b32c2009-07-22 15:44:28 +100054extern void ___pte_free_tlb(struct mmu_gather *tlb, struct page *pte);
55
56static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte,
57 unsigned long address)
58{
59 ___pte_free_tlb(tlb, pte);
60}
Jeremy Fitzhardinge397f6872008-03-17 16:36:57 -070061
Jeremy Fitzhardinge170fdff2008-03-17 16:36:58 -070062static inline void pmd_populate_kernel(struct mm_struct *mm,
63 pmd_t *pmd, pte_t *pte)
64{
Jeremy Fitzhardinge6944a9c2008-03-17 16:37:01 -070065 paravirt_alloc_pte(mm, __pa(pte) >> PAGE_SHIFT);
Jeremy Fitzhardinge170fdff2008-03-17 16:36:58 -070066 set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE));
67}
68
69static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
70 struct page *pte)
71{
72 unsigned long pfn = page_to_pfn(pte);
73
Jeremy Fitzhardinge6944a9c2008-03-17 16:37:01 -070074 paravirt_alloc_pte(mm, pfn);
Jeremy Fitzhardinge170fdff2008-03-17 16:36:58 -070075 set_pmd(pmd, __pmd(((pteval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE));
76}
77
78#define pmd_pgtable(pmd) pmd_page(pmd)
79
80#if PAGETABLE_LEVELS > 2
81static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
82{
83 return (pmd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
84}
85
86static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
87{
88 BUG_ON((unsigned long)pmd & (PAGE_SIZE-1));
89 free_page((unsigned long)pmd);
90}
91
Benjamin Herrenschmidt9e1b32c2009-07-22 15:44:28 +100092extern void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd);
93
94static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
95 unsigned long adddress)
96{
97 ___pmd_free_tlb(tlb, pmd);
98}
Jeremy Fitzhardinge170fdff2008-03-17 16:36:58 -070099
Jeremy Fitzhardinge5a5f8f42008-03-17 16:36:59 -0700100#ifdef CONFIG_X86_PAE
101extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd);
102#else /* !CONFIG_X86_PAE */
103static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
104{
Jeremy Fitzhardinge6944a9c2008-03-17 16:37:01 -0700105 paravirt_alloc_pmd(mm, __pa(pmd) >> PAGE_SHIFT);
Jeremy Fitzhardinge5a5f8f42008-03-17 16:36:59 -0700106 set_pud(pud, __pud(_PAGE_TABLE | __pa(pmd)));
107}
108#endif /* CONFIG_X86_PAE */
109
110#if PAGETABLE_LEVELS > 3
111static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
112{
Jeremy Fitzhardinge2761fa02008-03-17 16:37:02 -0700113 paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT);
Jeremy Fitzhardinge5a5f8f42008-03-17 16:36:59 -0700114 set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pud)));
115}
116
117static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
118{
119 return (pud_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
120}
121
122static inline void pud_free(struct mm_struct *mm, pud_t *pud)
123{
124 BUG_ON((unsigned long)pud & (PAGE_SIZE-1));
125 free_page((unsigned long)pud);
126}
127
Benjamin Herrenschmidt9e1b32c2009-07-22 15:44:28 +1000128extern void ___pud_free_tlb(struct mmu_gather *tlb, pud_t *pud);
129
130static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
131 unsigned long address)
132{
133 ___pud_free_tlb(tlb, pud);
134}
135
Jeremy Fitzhardinge5a5f8f42008-03-17 16:36:59 -0700136#endif /* PAGETABLE_LEVELS > 3 */
137#endif /* PAGETABLE_LEVELS > 2 */
Jeremy Fitzhardinge4f76cd32008-03-17 16:36:55 -0700138
H. Peter Anvin1965aae2008-10-22 22:26:29 -0700139#endif /* _ASM_X86_PGALLOC_H */