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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-sh/pgalloc.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-sh/pgalloc.h')
-rw-r--r-- | include/asm-sh/pgalloc.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/include/asm-sh/pgalloc.h b/include/asm-sh/pgalloc.h new file mode 100644 index 0000000..f4f233f --- /dev/null +++ b/include/asm-sh/pgalloc.h @@ -0,0 +1,88 @@ +#ifndef __ASM_SH_PGALLOC_H +#define __ASM_SH_PGALLOC_H + +#include <linux/threads.h> +#include <linux/slab.h> +#include <linux/mm.h> + +#define pgd_quicklist ((unsigned long *)0) +#define pmd_quicklist ((unsigned long *)0) +#define pte_quicklist ((unsigned long *)0) +#define pgtable_cache_size 0L + +#define pmd_populate_kernel(mm, pmd, pte) \ + set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte))) + +static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, + struct page *pte) +{ + set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte))); +} + +/* + * Allocate and free page tables. + */ +static inline pgd_t *pgd_alloc(struct mm_struct *mm) +{ + unsigned int pgd_size = (USER_PTRS_PER_PGD * sizeof(pgd_t)); + pgd_t *pgd = (pgd_t *)kmalloc(pgd_size, GFP_KERNEL); + + if (pgd) + memset(pgd, 0, pgd_size); + + return pgd; +} + +static inline void pgd_free(pgd_t *pgd) +{ + kfree(pgd); +} + +static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, + unsigned long address) +{ + pte_t *pte; + + pte = (pte_t *) __get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO); + + return pte; +} + +static inline struct page *pte_alloc_one(struct mm_struct *mm, + unsigned long address) +{ + struct page *pte; + + pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0); + + return pte; +} + +static inline void pte_free_kernel(pte_t *pte) +{ + free_page((unsigned long)pte); +} + +static inline void pte_free(struct page *pte) +{ + __free_page(pte); +} + +#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte)) + +/* + * allocating and freeing a pmd is trivial: the 1-entry pmd is + * inside the pgd, so has no extra memory associated with it. + */ + +#define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); }) +#define pmd_free(x) do { } while (0) +#define __pmd_free_tlb(tlb,x) do { } while (0) +#define pgd_populate(mm, pmd, pte) BUG() +#define check_pgt_cache() do { } while (0) + +#ifdef CONFIG_CPU_SH4 +#define PG_mapped PG_arch_1 +#endif + +#endif /* __ASM_SH_PGALLOC_H */ |