1 #ifndef _I386_PGALLOC_H
2 #define _I386_PGALLOC_H
3
4 #include <linux/threads.h>
5 #include <linux/mm.h> /* for struct page */
6
7 #ifdef CONFIG_PARAVIRT
8 #include <asm/paravirt.h>
9 #else
10 #define paravirt_alloc_pt(mm, pfn) do { } while (0)
11 #define paravirt_alloc_pd(pfn) do { } while (0)
12 #define paravirt_alloc_pd(pfn) do { } while (0)
13 #define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) do { } while (0)
14 #define paravirt_release_pt(pfn) do { } while (0)
15 #define paravirt_release_pd(pfn) do { } while (0)
16 #endif
17
18 #define pmd_populate_kernel(mm, pmd, pte) \
19 do { \
20 paravirt_alloc_pt(mm, __pa(pte) >> PAGE_SHIFT); \
21 set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte))); \
22 } while (0)
23
24 #define pmd_populate(mm, pmd, pte) \
25 do { \
26 paravirt_alloc_pt(mm, page_to_pfn(pte)); \
27 set_pmd(pmd, __pmd(_PAGE_TABLE + \
28 ((unsigned long long)page_to_pfn(pte) << \
29 (unsigned long long) PAGE_SHIFT))); \
30 } while (0)
31
32 /*
33 * Allocate and free page tables.
34 */
35 extern pgd_t *pgd_alloc(struct mm_struct *);
36 extern void pgd_free(pgd_t *pgd);
37
38 extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
39 extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
40
pte_free_kernel(pte_t * pte)41 static inline void pte_free_kernel(pte_t *pte)
42 {
43 free_page((unsigned long)pte);
44 }
45
pte_free(struct page * pte)46 static inline void pte_free(struct page *pte)
47 {
48 __free_page(pte);
49 }
50
51
52 #define __pte_free_tlb(tlb,pte) \
53 do { \
54 paravirt_release_pt(page_to_pfn(pte)); \
55 tlb_remove_page((tlb),(pte)); \
56 } while (0)
57
58 #ifdef CONFIG_X86_PAE
59 /*
60 * In the PAE case we free the pmds as part of the pgd.
61 */
62 #define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); })
63 #define pmd_free(x) do { } while (0)
64 #define __pmd_free_tlb(tlb,x) do { } while (0)
65 #define pud_populate(mm, pmd, pte) BUG()
66 #endif
67
68 #endif /* _I386_PGALLOC_H */
69