4f76cd3822
Add a common arch/x86/mm/pgtable.c file for common 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>
69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
#ifndef _X86_64_PGALLOC_H
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#define _X86_64_PGALLOC_H
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#include <asm/pda.h>
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static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
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{
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set_pmd(pmd, __pmd(_PAGE_TABLE | __pa(pte)));
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}
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static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
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{
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set_pud(pud, __pud(_PAGE_TABLE | __pa(pmd)));
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}
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static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
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{
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set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pud)));
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}
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#define pmd_pgtable(pmd) pmd_page(pmd)
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static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
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{
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set_pmd(pmd, __pmd(_PAGE_TABLE | (page_to_pfn(pte) << PAGE_SHIFT)));
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}
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static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
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{
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BUG_ON((unsigned long)pmd & (PAGE_SIZE-1));
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free_page((unsigned long)pmd);
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}
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static inline pmd_t *pmd_alloc_one (struct mm_struct *mm, unsigned long addr)
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{
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return (pmd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
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}
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static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
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{
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return (pud_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
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}
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static inline void pud_free(struct mm_struct *mm, pud_t *pud)
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{
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BUG_ON((unsigned long)pud & (PAGE_SIZE-1));
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free_page((unsigned long)pud);
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}
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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, pgtable_t pte)
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{
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pgtable_page_dtor(pte);
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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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extern void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd);
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extern void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud);
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#endif /* _X86_64_PGALLOC_H */
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