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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-generic/pgtable-nopud.h | |
download | kernel_samsung_smdk4412-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip kernel_samsung_smdk4412-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz kernel_samsung_smdk4412-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/asm-generic/pgtable-nopud.h')
-rw-r--r-- | include/asm-generic/pgtable-nopud.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/include/asm-generic/pgtable-nopud.h b/include/asm-generic/pgtable-nopud.h new file mode 100644 index 0000000..82e29f0 --- /dev/null +++ b/include/asm-generic/pgtable-nopud.h @@ -0,0 +1,61 @@ +#ifndef _PGTABLE_NOPUD_H +#define _PGTABLE_NOPUD_H + +#ifndef __ASSEMBLY__ + +#define __PAGETABLE_PUD_FOLDED + +/* + * Having the pud type consist of a pgd gets the size right, and allows + * us to conceptually access the pgd entry that this pud is folded into + * without casting. + */ +typedef struct { pgd_t pgd; } pud_t; + +#define PUD_SHIFT PGDIR_SHIFT +#define PTRS_PER_PUD 1 +#define PUD_SIZE (1UL << PUD_SHIFT) +#define PUD_MASK (~(PUD_SIZE-1)) + +/* + * The "pgd_xxx()" functions here are trivial for a folded two-level + * setup: the pud is never bad, and a pud always exists (as it's folded + * into the pgd entry) + */ +static inline int pgd_none(pgd_t pgd) { return 0; } +static inline int pgd_bad(pgd_t pgd) { return 0; } +static inline int pgd_present(pgd_t pgd) { return 1; } +static inline void pgd_clear(pgd_t *pgd) { } +#define pud_ERROR(pud) (pgd_ERROR((pud).pgd)) + +#define pgd_populate(mm, pgd, pud) do { } while (0) +/* + * (puds are folded into pgds so this doesn't get actually called, + * but the define is needed for a generic inline function.) + */ +#define set_pgd(pgdptr, pgdval) set_pud((pud_t *)(pgdptr), (pud_t) { pgdval }) + +static inline pud_t * pud_offset(pgd_t * pgd, unsigned long address) +{ + return (pud_t *)pgd; +} + +#define pud_val(x) (pgd_val((x).pgd)) +#define __pud(x) ((pud_t) { __pgd(x) } ) + +#define pgd_page(pgd) (pud_page((pud_t){ pgd })) +#define pgd_page_kernel(pgd) (pud_page_kernel((pud_t){ pgd })) + +/* + * allocating and freeing a pud is trivial: the 1-entry pud is + * inside the pgd, so has no extra memory associated with it. + */ +#define pud_alloc_one(mm, address) NULL +#define pud_free(x) do { } while (0) +#define __pud_free_tlb(tlb, x) do { } while (0) + +#undef pud_addr_end +#define pud_addr_end(addr, end) (end) + +#endif /* __ASSEMBLY__ */ +#endif /* _PGTABLE_NOPUD_H */ |