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 #include "asm/fixmap.h" 13 14 #define pmd_populate_kernel(mm, pmd, pte) \ 15 set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) __pa(pte))) 16 17 #define pmd_populate(mm, pmd, pte) \ 18 set_pmd(pmd, __pmd(_PAGE_TABLE + \ 19 ((unsigned long long)page_to_pfn(pte) << \ 20 (unsigned long long) PAGE_SHIFT))) 21 #define pmd_pgtable(pmd) pmd_page(pmd) 22 23 /* 24 * Allocate and free page tables. 25 */ 26 extern pgd_t *pgd_alloc(struct mm_struct *); 27 extern void pgd_free(struct mm_struct *mm, pgd_t *pgd); 28 29 extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long); 30 extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long); 31 32 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) 33 { 34 free_page((unsigned long) pte); 35 } 36 37 static inline void pte_free(struct mm_struct *mm, pgtable_t pte) 38 { 39 pgtable_page_dtor(pte); 40 __free_page(pte); 41 } 42 43 #define __pte_free_tlb(tlb,pte) \ 44 do { \ 45 pgtable_page_dtor(pte); \ 46 tlb_remove_page((tlb),(pte)); \ 47 } while (0) 48 49 #ifdef CONFIG_3_LEVEL_PGTABLES 50 51 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) 52 { 53 free_page((unsigned long)pmd); 54 } 55 56 #define __pmd_free_tlb(tlb,x) tlb_remove_page((tlb),virt_to_page(x)) 57 #endif 58 59 #define check_pgt_cache() do { } while (0) 60 61 #endif 62 63