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148 lines
4.2 KiB
148 lines
4.2 KiB
#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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* Flags to use when allocating a user page table page. |
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*/ |
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extern gfp_t __userpte_alloc_gfp; |
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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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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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static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte, |
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unsigned long address) |
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{ |
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___pte_free_tlb(tlb, pte); |
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} |
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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 CONFIG_PGTABLE_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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struct page *page; |
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page = alloc_pages(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO, 0); |
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if (!page) |
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return NULL; |
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if (!pgtable_pmd_page_ctor(page)) { |
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__free_pages(page, 0); |
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return NULL; |
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} |
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return (pmd_t *)page_address(page); |
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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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pgtable_pmd_page_dtor(virt_to_page(pmd)); |
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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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static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd, |
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unsigned long address) |
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{ |
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___pmd_free_tlb(tlb, pmd); |
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} |
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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 CONFIG_PGTABLE_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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static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud, |
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unsigned long address) |
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{ |
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___pud_free_tlb(tlb, pud); |
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} |
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#endif /* CONFIG_PGTABLE_LEVELS > 3 */ |
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#endif /* CONFIG_PGTABLE_LEVELS > 2 */ |
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#endif /* _ASM_X86_PGALLOC_H */
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