1 #ifndef _I386_PGALLOC_H 2 #define _I386_PGALLOC_H 3 4 #include <linux/threads.h> 5 #include <linux/mm.h> /* for struct page */ 6 7 #ifdef CONFIG_PARAVIRT 8 #include <asm/paravirt.h> 9 #else 10 #define paravirt_alloc_pt(mm, pfn) do { } while (0) 11 #define paravirt_alloc_pd(pfn) do { } while (0) 12 #define paravirt_alloc_pd(pfn) do { } while (0) 13 #define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) do { } while (0) 14 #define paravirt_release_pt(pfn) do { } while (0) 15 #define paravirt_release_pd(pfn) do { } while (0) 16 #endif 17 18 #define pmd_populate_kernel(mm, pmd, pte) \ 19 do { \ 20 paravirt_alloc_pt(mm, __pa(pte) >> PAGE_SHIFT); \ 21 set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte))); \ 22 } while (0) 23 24 #define pmd_populate(mm, pmd, pte) \ 25 do { \ 26 paravirt_alloc_pt(mm, page_to_pfn(pte)); \ 27 set_pmd(pmd, __pmd(_PAGE_TABLE + \ 28 ((unsigned long long)page_to_pfn(pte) << \ 29 (unsigned long long) PAGE_SHIFT))); \ 30 } while (0) 31 32 /* 33 * Allocate and free page tables. 34 */ 35 extern pgd_t *pgd_alloc(struct mm_struct *); 36 extern void pgd_free(pgd_t *pgd); 37 38 extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long); 39 extern struct page *pte_alloc_one(struct mm_struct *, unsigned long); 40 41 static inline void pte_free_kernel(pte_t *pte) 42 { 43 free_page((unsigned long)pte); 44 } 45 46 static inline void pte_free(struct page *pte) 47 { 48 __free_page(pte); 49 } 50 51 52 #define __pte_free_tlb(tlb,pte) \ 53 do { \ 54 paravirt_release_pt(page_to_pfn(pte)); \ 55 tlb_remove_page((tlb),(pte)); \ 56 } while (0) 57 58 #ifdef CONFIG_X86_PAE 59 /* 60 * In the PAE case we free the pmds as part of the pgd. 61 */ 62 #define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); }) 63 #define pmd_free(x) do { } while (0) 64 #define __pmd_free_tlb(tlb,x) do { } while (0) 65 #define pud_populate(mm, pmd, pte) BUG() 66 #endif 67 68 #endif /* _I386_PGALLOC_H */ 69
