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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-generic/pgtable-nopmd.h | |
download | linux-fsl-qoriq-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
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-nopmd.h')
-rw-r--r-- | include/asm-generic/pgtable-nopmd.h | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/include/asm-generic/pgtable-nopmd.h b/include/asm-generic/pgtable-nopmd.h new file mode 100644 index 0000000..c8d53ba --- /dev/null +++ b/include/asm-generic/pgtable-nopmd.h @@ -0,0 +1,65 @@ +#ifndef _PGTABLE_NOPMD_H +#define _PGTABLE_NOPMD_H + +#ifndef __ASSEMBLY__ + +#include <asm-generic/pgtable-nopud.h> + +#define __PAGETABLE_PMD_FOLDED + +/* + * Having the pmd type consist of a pud gets the size right, and allows + * us to conceptually access the pud entry that this pmd is folded into + * without casting. + */ +typedef struct { pud_t pud; } pmd_t; + +#define PMD_SHIFT PUD_SHIFT +#define PTRS_PER_PMD 1 +#define PMD_SIZE (1UL << PMD_SHIFT) +#define PMD_MASK (~(PMD_SIZE-1)) + +/* + * The "pud_xxx()" functions here are trivial for a folded two-level + * setup: the pmd is never bad, and a pmd always exists (as it's folded + * into the pud entry) + */ +static inline int pud_none(pud_t pud) { return 0; } +static inline int pud_bad(pud_t pud) { return 0; } +static inline int pud_present(pud_t pud) { return 1; } +static inline void pud_clear(pud_t *pud) { } +#define pmd_ERROR(pmd) (pud_ERROR((pmd).pud)) + +#define pud_populate(mm, pmd, pte) do { } while (0) + +/* + * (pmds are folded into puds so this doesn't get actually called, + * but the define is needed for a generic inline function.) + */ +#define set_pud(pudptr, pudval) set_pmd((pmd_t *)(pudptr), (pmd_t) { pudval }) + +static inline pmd_t * pmd_offset(pud_t * pud, unsigned long address) +{ + return (pmd_t *)pud; +} + +#define pmd_val(x) (pud_val((x).pud)) +#define __pmd(x) ((pmd_t) { __pud(x) } ) + +#define pud_page(pud) (pmd_page((pmd_t){ pud })) +#define pud_page_kernel(pud) (pmd_page_kernel((pmd_t){ pud })) + +/* + * allocating and freeing a pmd is trivial: the 1-entry pmd is + * inside the pud, so has no extra memory associated with it. + */ +#define pmd_alloc_one(mm, address) NULL +#define pmd_free(x) do { } while (0) +#define __pmd_free_tlb(tlb, x) do { } while (0) + +#undef pmd_addr_end +#define pmd_addr_end(addr, end) (end) + +#endif /* __ASSEMBLY__ */ + +#endif /* _PGTABLE_NOPMD_H */ |