69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
#ifndef _I386_PGALLOC_H
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#define _I386_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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#ifdef CONFIG_PARAVIRT
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#include <asm/paravirt.h>
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#else
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#define paravirt_alloc_pt(pfn) do { } while (0)
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#define paravirt_alloc_pd(pfn) do { } while (0)
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#define paravirt_alloc_pd(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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#define pmd_populate_kernel(mm, pmd, pte) \
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do { \
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paravirt_alloc_pt(__pa(pte) >> PAGE_SHIFT); \
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set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte))); \
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} while (0)
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#define pmd_populate(mm, pmd, pte) \
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do { \
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paravirt_alloc_pt(page_to_pfn(pte)); \
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set_pmd(pmd, __pmd(_PAGE_TABLE + \
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((unsigned long long)page_to_pfn(pte) << \
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(unsigned long long) PAGE_SHIFT))); \
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} while (0)
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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(pgd_t *pgd);
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extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
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extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
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static inline void pte_free_kernel(pte_t *pte)
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{
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free_page((unsigned long)pte);
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}
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static inline void pte_free(struct page *pte)
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{
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__free_page(pte);
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}
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#define __pte_free_tlb(tlb,pte) \
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do { \
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paravirt_release_pt(page_to_pfn(pte)); \
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tlb_remove_page((tlb),(pte)); \
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} while (0)
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#ifdef CONFIG_X86_PAE
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/*
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* In the PAE case we free the pmds as part of the pgd.
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*/
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#define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); })
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#define pmd_free(x) do { } while (0)
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#define __pmd_free_tlb(tlb,x) do { } while (0)
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#define pud_populate(mm, pmd, pte) BUG()
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#endif
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#endif /* _I386_PGALLOC_H */
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