1 #ifndef _X86_64_PGALLOC_H
2 #define _X86_64_PGALLOC_H
4 #include <asm/processor.h>
5 #include <asm/fixmap.h>
7 #include <linux/threads.h>
10 #define arch_add_exec_range(mm, limit) do { ; } while (0)
11 #define arch_flush_exec_range(mm) do { ; } while (0)
12 #define arch_remove_exec_range(mm, limit) do { ; } while (0)
15 #define pmd_populate_kernel(mm, pmd, pte) \
16 set_pmd(pmd, __pmd(_PAGE_TABLE | __pa(pte)))
17 #define pgd_populate(mm, pgd, pmd) \
18 set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pmd)))
20 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
22 set_pmd(pmd, __pmd(_PAGE_TABLE | (page_to_pfn(pte) << PAGE_SHIFT)));
25 extern __inline__ pmd_t *get_pmd(void)
27 return (pmd_t *)get_zeroed_page(GFP_KERNEL);
30 extern __inline__ void pmd_free(pmd_t *pmd)
32 BUG_ON((unsigned long)pmd & (PAGE_SIZE-1));
33 free_page((unsigned long)pmd);
36 static inline pmd_t *pmd_alloc_one (struct mm_struct *mm, unsigned long addr)
38 return (pmd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
41 static inline pgd_t *pgd_alloc (struct mm_struct *mm)
43 return (pgd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
46 static inline void pgd_free (pgd_t *pgd)
48 BUG_ON((unsigned long)pgd & (PAGE_SIZE-1));
49 free_page((unsigned long)pgd);
52 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
54 return (pte_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
57 static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
59 void *p = (void *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
62 return virt_to_page(p);
65 /* Should really implement gc for free page table pages. This could be
66 done with a reference count in struct page. */
68 extern __inline__ void pte_free_kernel(pte_t *pte)
70 BUG_ON((unsigned long)pte & (PAGE_SIZE-1));
71 free_page((unsigned long)pte);
74 extern inline void pte_free(struct page *pte)
79 #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
80 #define __pmd_free_tlb(tlb,x) pmd_free(x)
82 #endif /* _X86_64_PGALLOC_H */