| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 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 */ |