]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | #ifndef _PGTABLE_NOPMD_H |
2 | #define _PGTABLE_NOPMD_H | |
3 | ||
4 | #ifndef __ASSEMBLY__ | |
5 | ||
6 | #include <asm-generic/pgtable-nopud.h> | |
7 | ||
8 | #define __PAGETABLE_PMD_FOLDED | |
9 | ||
10 | /* | |
11 | * Having the pmd type consist of a pud gets the size right, and allows | |
12 | * us to conceptually access the pud entry that this pmd is folded into | |
13 | * without casting. | |
14 | */ | |
15 | typedef struct { pud_t pud; } pmd_t; | |
16 | ||
17 | #define PMD_SHIFT PUD_SHIFT | |
18 | #define PTRS_PER_PMD 1 | |
19 | #define PMD_SIZE (1UL << PMD_SHIFT) | |
20 | #define PMD_MASK (~(PMD_SIZE-1)) | |
21 | ||
22 | /* | |
23 | * The "pud_xxx()" functions here are trivial for a folded two-level | |
24 | * setup: the pmd is never bad, and a pmd always exists (as it's folded | |
25 | * into the pud entry) | |
26 | */ | |
27 | static inline int pud_none(pud_t pud) { return 0; } | |
28 | static inline int pud_bad(pud_t pud) { return 0; } | |
29 | static inline int pud_present(pud_t pud) { return 1; } | |
30 | static inline void pud_clear(pud_t *pud) { } | |
31 | #define pmd_ERROR(pmd) (pud_ERROR((pmd).pud)) | |
32 | ||
33 | #define pud_populate(mm, pmd, pte) do { } while (0) | |
34 | ||
35 | /* | |
36 | * (pmds are folded into puds so this doesn't get actually called, | |
37 | * but the define is needed for a generic inline function.) | |
38 | */ | |
39 | #define set_pud(pudptr, pudval) set_pmd((pmd_t *)(pudptr), (pmd_t) { pudval }) | |
40 | ||
41 | static inline pmd_t * pmd_offset(pud_t * pud, unsigned long address) | |
42 | { | |
43 | return (pmd_t *)pud; | |
44 | } | |
45 | ||
46 | #define pmd_val(x) (pud_val((x).pud)) | |
47 | #define __pmd(x) ((pmd_t) { __pud(x) } ) | |
48 | ||
49 | #define pud_page(pud) (pmd_page((pmd_t){ pud })) | |
50 | #define pud_page_kernel(pud) (pmd_page_kernel((pmd_t){ pud })) | |
51 | ||
52 | /* | |
53 | * allocating and freeing a pmd is trivial: the 1-entry pmd is | |
54 | * inside the pud, so has no extra memory associated with it. | |
55 | */ | |
56 | #define pmd_alloc_one(mm, address) NULL | |
57 | #define pmd_free(x) do { } while (0) | |
58 | #define __pmd_free_tlb(tlb, x) do { } while (0) | |
59 | ||
60 | #undef pmd_addr_end | |
61 | #define pmd_addr_end(addr, end) (end) | |
62 | ||
63 | #endif /* __ASSEMBLY__ */ | |
64 | ||
65 | #endif /* _PGTABLE_NOPMD_H */ |