1965aae3c9
Change header guards named "ASM_X86__*" to "_ASM_X86_*" since: a. the double underscore is ugly and pointless. b. no leading underscore violates namespace constraints. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
115 lines
3.5 KiB
C
115 lines
3.5 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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static inline int __paravirt_pgd_alloc(struct mm_struct *mm) { return 0; }
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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_pgd_alloc(mm) __paravirt_pgd_alloc(mm)
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static inline void paravirt_pgd_free(struct mm_struct *mm, pgd_t *pgd) {}
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static inline void paravirt_alloc_pte(struct mm_struct *mm, unsigned long pfn) {}
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static inline void paravirt_alloc_pmd(struct mm_struct *mm, unsigned long pfn) {}
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static inline void paravirt_alloc_pmd_clone(unsigned long pfn, unsigned long clonepfn,
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unsigned long start, unsigned long count) {}
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static inline void paravirt_alloc_pud(struct mm_struct *mm, unsigned long pfn) {}
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static inline void paravirt_release_pte(unsigned long pfn) {}
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static inline void paravirt_release_pmd(unsigned long pfn) {}
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static inline void paravirt_release_pud(unsigned long pfn) {}
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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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static inline void pmd_populate_kernel(struct mm_struct *mm,
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pmd_t *pmd, pte_t *pte)
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{
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paravirt_alloc_pte(mm, __pa(pte) >> PAGE_SHIFT);
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set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE));
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}
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static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
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struct page *pte)
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{
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unsigned long pfn = page_to_pfn(pte);
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paravirt_alloc_pte(mm, pfn);
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set_pmd(pmd, __pmd(((pteval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE));
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}
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#define pmd_pgtable(pmd) pmd_page(pmd)
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#if PAGETABLE_LEVELS > 2
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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 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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extern void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd);
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#ifdef CONFIG_X86_PAE
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extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd);
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#else /* !CONFIG_X86_PAE */
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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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paravirt_alloc_pmd(mm, __pa(pmd) >> PAGE_SHIFT);
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set_pud(pud, __pud(_PAGE_TABLE | __pa(pmd)));
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}
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#endif /* CONFIG_X86_PAE */
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#if PAGETABLE_LEVELS > 3
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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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paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT);
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set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pud)));
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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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extern void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud);
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#endif /* PAGETABLE_LEVELS > 3 */
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#endif /* PAGETABLE_LEVELS > 2 */
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#endif /* _ASM_X86_PGALLOC_H */
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