Commit | Line | Data |
---|---|---|
2a5eacca | 1 | #include <linux/mm.h> |
5a0e3ad6 | 2 | #include <linux/slab.h> |
2a5eacca MF |
3 | |
4 | #define PGALLOC_GFP GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO | |
5 | ||
6 | static struct kmem_cache *pgd_cachep; | |
782bb5a5 | 7 | #if PAGETABLE_LEVELS > 2 |
2a5eacca MF |
8 | static struct kmem_cache *pmd_cachep; |
9 | #endif | |
10 | ||
11 | void pgd_ctor(void *x) | |
12 | { | |
13 | pgd_t *pgd = x; | |
14 | ||
15 | memcpy(pgd + USER_PTRS_PER_PGD, | |
16 | swapper_pg_dir + USER_PTRS_PER_PGD, | |
17 | (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t)); | |
18 | } | |
19 | ||
20 | void pgtable_cache_init(void) | |
21 | { | |
22 | pgd_cachep = kmem_cache_create("pgd_cache", | |
23 | PTRS_PER_PGD * (1<<PTE_MAGNITUDE), | |
24 | PAGE_SIZE, SLAB_PANIC, pgd_ctor); | |
782bb5a5 | 25 | #if PAGETABLE_LEVELS > 2 |
2a5eacca MF |
26 | pmd_cachep = kmem_cache_create("pmd_cache", |
27 | PTRS_PER_PMD * (1<<PTE_MAGNITUDE), | |
28 | PAGE_SIZE, SLAB_PANIC, NULL); | |
29 | #endif | |
30 | } | |
31 | ||
32 | pgd_t *pgd_alloc(struct mm_struct *mm) | |
33 | { | |
34 | return kmem_cache_alloc(pgd_cachep, PGALLOC_GFP); | |
35 | } | |
36 | ||
37 | void pgd_free(struct mm_struct *mm, pgd_t *pgd) | |
38 | { | |
39 | kmem_cache_free(pgd_cachep, pgd); | |
40 | } | |
41 | ||
782bb5a5 | 42 | #if PAGETABLE_LEVELS > 2 |
2a5eacca MF |
43 | void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) |
44 | { | |
45 | set_pud(pud, __pud((unsigned long)pmd)); | |
46 | } | |
47 | ||
48 | pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) | |
49 | { | |
50 | return kmem_cache_alloc(pmd_cachep, PGALLOC_GFP); | |
51 | } | |
52 | ||
53 | void pmd_free(struct mm_struct *mm, pmd_t *pmd) | |
54 | { | |
55 | kmem_cache_free(pmd_cachep, pmd); | |
56 | } | |
782bb5a5 | 57 | #endif /* PAGETABLE_LEVELS > 2 */ |