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397f687ab7
Common definitions for 2-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>
50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
#ifndef _ASM_X86_PGALLOC_H
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#define _ASM_X86_PGALLOC_H
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#include <linux/threads.h>
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#include <linux/mm.h> /* for struct page */
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#include <linux/pagemap.h>
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#ifdef CONFIG_PARAVIRT
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#include <asm/paravirt.h>
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#else
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#define paravirt_alloc_pt(mm, pfn) do { } while (0)
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#define paravirt_alloc_pd(mm, pfn) do { } while (0)
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#define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) do { } while (0)
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#define paravirt_release_pt(pfn) do { } while (0)
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#define paravirt_release_pd(pfn) do { } while (0)
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#endif
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/*
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* Allocate and free page tables.
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*/
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extern pgd_t *pgd_alloc(struct mm_struct *);
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extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
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extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
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extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long);
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/* Should really implement gc for free page table pages. This could be
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done with a reference count in struct page. */
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static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
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{
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BUG_ON((unsigned long)pte & (PAGE_SIZE-1));
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free_page((unsigned long)pte);
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}
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static inline void pte_free(struct mm_struct *mm, struct page *pte)
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{
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__free_page(pte);
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}
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extern void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte);
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#ifdef CONFIG_X86_32
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# include "pgalloc_32.h"
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#else
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# include "pgalloc_64.h"
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#endif
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#endif /* _ASM_X86_PGALLOC_H */
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