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 unsigned long address) 42 { 43 pte_t *pte; 44 45 pte = (pte_t *) __get_free_pages(GFP_KERNEL|__GFP_ZERO, PTE_ORDER); 46 47 return pte; 48 } 49 50 static inline pgtable_t pte_alloc_one(struct mm_struct *mm, 51 unsigned long address) 52 { 53 struct page *pte; 54 55 pte = alloc_pages(GFP_KERNEL, PTE_ORDER); 56 if (pte) { 57 if (!pgtable_page_ctor(pte)) { 58 __free_page(pte); 59 return NULL; 60 } 61 clear_highpage(pte); 62 } 63 return pte; 64 } 65 66 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) 67 { 68 free_pages((unsigned long)pte, PTE_ORDER); 69 } 70 71 static inline void pte_free(struct mm_struct *mm, struct page *pte) 72 { 73 pgtable_page_dtor(pte); 74 __free_pages(pte, PTE_ORDER); 75 } 76 77 #define __pte_free_tlb(tlb, pte, addr) \ 78 do { \ 79 pgtable_page_dtor(pte); \ 80 tlb_remove_page((tlb), (pte)); \ 81 } while (0) 82 83 #define check_pgt_cache() do { } while (0) 84 85 #endif /* _ASM_NIOS2_PGALLOC_H */ 86