1 /* 2 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) 3 * Copyright 2003 PathScale, Inc. 4 * Derived from include/asm-i386/pgalloc.h and include/asm-i386/pgtable.h 5 * Licensed under the GPL 6 */ 7 8 #ifndef __UM_PGALLOC_H 9 #define __UM_PGALLOC_H 10 11 #include <linux/mm.h> 12 13 #define pmd_populate_kernel(mm, pmd, pte) \ 14 set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) __pa(pte))) 15 16 #define pmd_populate(mm, pmd, pte) \ 17 set_pmd(pmd, __pmd(_PAGE_TABLE + \ 18 ((unsigned long long)page_to_pfn(pte) << \ 19 (unsigned long long) PAGE_SHIFT))) 20 #define pmd_pgtable(pmd) pmd_page(pmd) 21 22 /* 23 * Allocate and free page tables. 24 */ 25 extern pgd_t *pgd_alloc(struct mm_struct *); 26 extern void pgd_free(struct mm_struct *mm, pgd_t *pgd); 27 28 extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long); 29 extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long); 30 31 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) 32 { 33 free_page((unsigned long) pte); 34 } 35 36 static inline void pte_free(struct mm_struct *mm, pgtable_t pte) 37 { 38 pgtable_page_dtor(pte); 39 __free_page(pte); 40 } 41 42 #define __pte_free_tlb(tlb,pte, address) \ 43 do { \ 44 pgtable_page_dtor(pte); \ 45 tlb_remove_page((tlb),(pte)); \ 46 } while (0) 47 48 #ifdef CONFIG_3_LEVEL_PGTABLES 49 50 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) 51 { 52 free_page((unsigned long)pmd); 53 } 54 55 #define __pmd_free_tlb(tlb,x, address) tlb_remove_page((tlb),virt_to_page(x)) 56 #endif 57 58 #define check_pgt_cache() do { } while (0) 59 60 #endif 61 62