78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
#ifndef _X86_64_PGALLOC_H
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#define _X86_64_PGALLOC_H
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#include <asm/processor.h>
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#include <asm/fixmap.h>
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#include <asm/pda.h>
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#include <linux/threads.h>
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#include <linux/mm.h>
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#define pmd_populate_kernel(mm, pmd, pte) \
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set_pmd(pmd, __pmd(_PAGE_TABLE | __pa(pte)))
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#define pgd_populate(mm, pgd, pmd) \
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set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(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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extern __inline__ pmd_t *get_pmd(void)
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{
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return (pmd_t *)get_zeroed_page(GFP_KERNEL);
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}
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extern __inline__ void pmd_free(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 pgd_t *pgd_alloc (struct mm_struct *mm)
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{
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return (pgd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
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}
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static inline void pgd_free (pgd_t *pgd)
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{
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BUG_ON((unsigned long)pgd & (PAGE_SIZE-1));
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free_page((unsigned long)pgd);
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}
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static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
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{
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return (pte_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
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}
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static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
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{
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void *p = (void *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
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if (!p)
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return NULL;
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return virt_to_page(p);
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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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extern __inline__ void pte_free_kernel(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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extern 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) tlb_remove_page((tlb),(pte))
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#define __pmd_free_tlb(tlb,x) pmd_free(x)
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#endif /* _X86_64_PGALLOC_H */
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