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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-03-17 16:36:58 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-24 23:57:30 +0200 |
| commit | 170fdff7057d4247e3f28cca96d0db1fbc854e3b (patch) | |
| tree | b0d5281dc5de0b9a0ddb1e626818d8f7f562713c /include/asm-x86/pgalloc.h | |
| parent | 397f687ab7f840dbe50353c4b60108672b653d0c (diff) | |
| download | lwn-170fdff7057d4247e3f28cca96d0db1fbc854e3b.tar.gz lwn-170fdff7057d4247e3f28cca96d0db1fbc854e3b.zip | |
x86: move pmd functions into common asm/pgalloc.h
Common definitions for 3-level pagetable functions.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/asm-x86/pgalloc.h')
| -rw-r--r-- | include/asm-x86/pgalloc.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/include/asm-x86/pgalloc.h b/include/asm-x86/pgalloc.h index 0d15e21eefec..ae23839db20b 100644 --- a/include/asm-x86/pgalloc.h +++ b/include/asm-x86/pgalloc.h @@ -40,6 +40,39 @@ static inline void pte_free(struct mm_struct *mm, struct page *pte) extern void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte); +static inline void pmd_populate_kernel(struct mm_struct *mm, + pmd_t *pmd, pte_t *pte) +{ + paravirt_alloc_pt(mm, __pa(pte) >> PAGE_SHIFT); + set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE)); +} + +static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, + struct page *pte) +{ + unsigned long pfn = page_to_pfn(pte); + + paravirt_alloc_pt(mm, pfn); + set_pmd(pmd, __pmd(((pteval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE)); +} + +#define pmd_pgtable(pmd) pmd_page(pmd) + +#if PAGETABLE_LEVELS > 2 +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 void pmd_free(struct mm_struct *mm, pmd_t *pmd) +{ + BUG_ON((unsigned long)pmd & (PAGE_SIZE-1)); + free_page((unsigned long)pmd); +} + +extern void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd); +#endif /* PAGETABLE_LEVELS > 2 */ + #ifdef CONFIG_X86_32 # include "pgalloc_32.h" #else |