1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 1994 - 2001, 2003 by Ralf Baechle 7 * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc. 8 */ 9 10 #ifndef _ASM_NIOS2_PGALLOC_H 11 #define _ASM_NIOS2_PGALLOC_H 12 13 #include <linux/mm.h> 14 15 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, 16 pte_t *pte) 17 { 18 set_pmd(pmd, __pmd((unsigned long)pte)); 19 } 20 21 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, 22 pgtable_t pte) 23 { 24 set_pmd(pmd, __pmd((unsigned long)page_address(pte))); 25 } 26 #define pmd_pgtable(pmd) pmd_page(pmd) 27 28 /* 29 * Initialize a new pmd table with invalid pointers. 30 */ 31 extern void pmd_init(unsigned long page, unsigned long pagetable); 32 33 extern pgd_t *pgd_alloc(struct mm_struct *mm); 34 35 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) 36 { 37 free_pages((unsigned long)pgd, PGD_ORDER); 38 } 39 40 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm) 41 { 42 pte_t *pte; 43 44 pte = (pte_t *) __get_free_pages(GFP_KERNEL|__GFP_ZERO, PTE_ORDER); 45 46 return pte; 47 } 48 49 static inline pgtable_t pte_alloc_one(struct mm_struct *mm) 50 { 51 struct page *pte; 52 53 pte = alloc_pages(GFP_KERNEL, PTE_ORDER); 54 if (pte) { 55 if (!pgtable_page_ctor(pte)) { 56 __free_page(pte); 57 return NULL; 58 } 59 clear_highpage(pte); 60 } 61 return pte; 62 } 63 64 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) 65 { 66 free_pages((unsigned long)pte, PTE_ORDER); 67 } 68 69 static inline void pte_free(struct mm_struct *mm, struct page *pte) 70 { 71 pgtable_page_dtor(pte); 72 __free_pages(pte, PTE_ORDER); 73 } 74 75 #define __pte_free_tlb(tlb, pte, addr) \ 76 do { \ 77 pgtable_page_dtor(pte); \ 78 tlb_remove_page((tlb), (pte)); \ 79 } while (0) 80 81 #define check_pgt_cache() do { } while (0) 82 83 #endif /* _ASM_NIOS2_PGALLOC_H */ 84