| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef _ALPHA_PGALLOC_H |
| 3 | #define _ALPHA_PGALLOC_H |
| 4 | |
| 5 | #include <linux/mm.h> |
| 6 | #include <linux/mmzone.h> |
| 7 | |
| 8 | /* |
| 9 | * Allocate and free page tables. The xxx_kernel() versions are |
| 10 | * used to allocate a kernel page table - this turns on ASN bits |
| 11 | * if any. |
| 12 | */ |
| 13 | |
| 14 | static inline void |
| 15 | pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t pte) |
| 16 | { |
| 17 | pmd_set(pmd, (pte_t *)(page_to_pa(pte) + PAGE_OFFSET)); |
| 18 | } |
| 19 | #define pmd_pgtable(pmd) pmd_page(pmd) |
| 20 | |
| 21 | static inline void |
| 22 | pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte) |
| 23 | { |
| 24 | pmd_set(pmd, pte); |
| 25 | } |
| 26 | |
| 27 | static inline void |
| 28 | pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd) |
| 29 | { |
| 30 | pgd_set(pgd, pmd); |
| 31 | } |
| 32 | |
| 33 | extern pgd_t *pgd_alloc(struct mm_struct *mm); |
| 34 | |
| 35 | static inline void |
| 36 | pgd_free(struct mm_struct *mm, pgd_t *pgd) |
| 37 | { |
| 38 | free_page((unsigned long)pgd); |
| 39 | } |
| 40 | |
| 41 | static inline pmd_t * |
| 42 | pmd_alloc_one(struct mm_struct *mm, unsigned long address) |
| 43 | { |
| 44 | pmd_t *ret = (pmd_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO); |
| 45 | return ret; |
| 46 | } |
| 47 | |
| 48 | static inline void |
| 49 | pmd_free(struct mm_struct *mm, pmd_t *pmd) |
| 50 | { |
| 51 | free_page((unsigned long)pmd); |
| 52 | } |
| 53 | |
| 54 | static inline pte_t * |
| 55 | pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) |
| 56 | { |
| 57 | pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO); |
| 58 | return pte; |
| 59 | } |
| 60 | |
| 61 | static inline void |
| 62 | pte_free_kernel(struct mm_struct *mm, pte_t *pte) |
| 63 | { |
| 64 | free_page((unsigned long)pte); |
| 65 | } |
| 66 | |
| 67 | static inline pgtable_t |
| 68 | pte_alloc_one(struct mm_struct *mm, unsigned long address) |
| 69 | { |
| 70 | pte_t *pte = pte_alloc_one_kernel(mm, address); |
| 71 | struct page *page; |
| 72 | |
| 73 | if (!pte) |
| 74 | return NULL; |
| 75 | page = virt_to_page(pte); |
| 76 | if (!pgtable_page_ctor(page)) { |
| 77 | __free_page(page); |
| 78 | return NULL; |
| 79 | } |
| 80 | return page; |
| 81 | } |
| 82 | |
| 83 | static inline void |
| 84 | pte_free(struct mm_struct *mm, pgtable_t page) |
| 85 | { |
| 86 | pgtable_page_dtor(page); |
| 87 | __free_page(page); |
| 88 | } |
| 89 | |
| 90 | #define check_pgt_cache() do { } while (0) |
| 91 | |
| 92 | #endif /* _ALPHA_PGALLOC_H */ |