1 #ifndef _PGTABLE_NOPMD_H
2 #define _PGTABLE_NOPMD_H
6 #include <asm-generic/pgtable-nopud.h>
9 * Having the pmd type consist of a pud gets the size right, and allows
10 * us to conceptually access the pud entry that this pmd is folded into
13 typedef struct { pud_t pud; } pmd_t;
15 #define PMD_SHIFT PUD_SHIFT
16 #define PTRS_PER_PMD 1
17 #define PMD_SIZE (1UL << PMD_SHIFT)
18 #define PMD_MASK (~(PMD_SIZE-1))
21 * The "pud_xxx()" functions here are trivial for a folded two-level
22 * setup: the pmd is never bad, and a pmd always exists (as it's folded
25 static inline int pud_none(pud_t pud) { return 0; }
26 static inline int pud_bad(pud_t pud) { return 0; }
27 static inline int pud_present(pud_t pud) { return 1; }
28 static inline void pud_clear(pud_t *pud) { }
29 #define pmd_ERROR(pmd) (pud_ERROR((pmd).pud))
31 #define pud_populate(mm, pmd, pte) do { } while (0)
34 * (pmds are folded into puds so this doesn't get actually called,
35 * but the define is needed for a generic inline function.)
37 #define set_pud(pudptr, pudval) set_pmd((pmd_t *)(pudptr), (pmd_t) { pudval })
39 static inline pmd_t * pmd_offset(pud_t * pud, unsigned long address)
44 #define pmd_val(x) (pud_val((x).pud))
45 #define __pmd(x) ((pmd_t) { __pud(x) } )
47 #define pud_page(pud) (pmd_page((pmd_t){ pud }))
48 #define pud_page_kernel(pud) (pmd_page_kernel((pmd_t){ pud }))
51 * allocating and freeing a pmd is trivial: the 1-entry pmd is
52 * inside the pud, so has no extra memory associated with it.
54 #define pmd_alloc_one(mm, address) NULL
55 #define pmd_free(x) do { } while (0)
56 #define __pmd_free_tlb(tlb, x) do { } while (0)
58 #endif /* __ASSEMBLY__ */
60 #endif /* _PGTABLE_NOPMD_H */