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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-x86_64/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-x86_64/pgalloc.h')
-rw-r--r-- | include/asm-x86_64/pgalloc.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/include/asm-x86_64/pgalloc.h b/include/asm-x86_64/pgalloc.h new file mode 100644 index 0000000..deadd14 --- /dev/null +++ b/include/asm-x86_64/pgalloc.h @@ -0,0 +1,105 @@ +#ifndef _X86_64_PGALLOC_H +#define _X86_64_PGALLOC_H + +#include <asm/fixmap.h> +#include <asm/pda.h> +#include <linux/threads.h> +#include <linux/mm.h> + +#define pmd_populate_kernel(mm, pmd, pte) \ + set_pmd(pmd, __pmd(_PAGE_TABLE | __pa(pte))) +#define pud_populate(mm, pud, pmd) \ + set_pud(pud, __pud(_PAGE_TABLE | __pa(pmd))) +#define pgd_populate(mm, pgd, pud) \ + set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pud))) + +static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte) +{ + set_pmd(pmd, __pmd(_PAGE_TABLE | (page_to_pfn(pte) << PAGE_SHIFT))); +} + +extern __inline__ pmd_t *get_pmd(void) +{ + return (pmd_t *)get_zeroed_page(GFP_KERNEL); +} + +extern __inline__ void pmd_free(pmd_t *pmd) +{ + BUG_ON((unsigned long)pmd & (PAGE_SIZE-1)); + free_page((unsigned long)pmd); +} + +static inline pmd_t *pmd_alloc_one (struct mm_struct *mm, unsigned long addr) +{ + return (pmd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); +} + +static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) +{ + return (pud_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); +} + +static inline void pud_free (pud_t *pud) +{ + BUG_ON((unsigned long)pud & (PAGE_SIZE-1)); + free_page((unsigned long)pud); +} + +static inline pgd_t *pgd_alloc(struct mm_struct *mm) +{ + unsigned boundary; + pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT); + if (!pgd) + return NULL; + /* + * Copy kernel pointers in from init. + * Could keep a freelist or slab cache of those because the kernel + * part never changes. + */ + boundary = pgd_index(__PAGE_OFFSET); + memset(pgd, 0, boundary * sizeof(pgd_t)); + memcpy(pgd + boundary, + init_level4_pgt + boundary, + (PTRS_PER_PGD - boundary) * sizeof(pgd_t)); + return pgd; +} + +static inline void pgd_free(pgd_t *pgd) +{ + BUG_ON((unsigned long)pgd & (PAGE_SIZE-1)); + free_page((unsigned long)pgd); +} + +static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) +{ + return (pte_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); +} + +static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address) +{ + void *p = (void *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); + if (!p) + return NULL; + return virt_to_page(p); +} + +/* Should really implement gc for free page table pages. This could be + done with a reference count in struct page. */ + +extern __inline__ void pte_free_kernel(pte_t *pte) +{ + BUG_ON((unsigned long)pte & (PAGE_SIZE-1)); + free_page((unsigned long)pte); +} + +extern inline void pte_free(struct page *pte) +{ + __free_page(pte); +} + +#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte)) + +#define __pmd_free_tlb(tlb,x) tlb_remove_page((tlb),virt_to_page(x)) +#define __pud_free_tlb(tlb,x) tlb_remove_page((tlb),virt_to_page(x)) + +#endif /* _X86_64_PGALLOC_H */ |