James Hogan | f5df8e2 | 2012-10-09 10:54:17 +0100 | [diff] [blame] | 1 | #ifndef _METAG_PGALLOC_H |
| 2 | #define _METAG_PGALLOC_H |
| 3 | |
| 4 | #include <linux/threads.h> |
| 5 | #include <linux/mm.h> |
| 6 | |
| 7 | #define pmd_populate_kernel(mm, pmd, pte) \ |
| 8 | set_pmd(pmd, __pmd(_PAGE_TABLE | __pa(pte))) |
| 9 | |
| 10 | #define pmd_populate(mm, pmd, pte) \ |
| 11 | set_pmd(pmd, __pmd(_PAGE_TABLE | page_to_phys(pte))) |
| 12 | |
| 13 | #define pmd_pgtable(pmd) pmd_page(pmd) |
| 14 | |
| 15 | /* |
| 16 | * Allocate and free page tables. |
| 17 | */ |
| 18 | #ifdef CONFIG_METAG_META21_MMU |
| 19 | static inline void pgd_ctor(pgd_t *pgd) |
| 20 | { |
| 21 | memcpy(pgd + USER_PTRS_PER_PGD, |
| 22 | swapper_pg_dir + USER_PTRS_PER_PGD, |
| 23 | (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t)); |
| 24 | } |
| 25 | #else |
| 26 | #define pgd_ctor(x) do { } while (0) |
| 27 | #endif |
| 28 | |
| 29 | static inline pgd_t *pgd_alloc(struct mm_struct *mm) |
| 30 | { |
| 31 | pgd_t *pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL); |
| 32 | if (pgd) |
| 33 | pgd_ctor(pgd); |
| 34 | return pgd; |
| 35 | } |
| 36 | |
| 37 | static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) |
| 38 | { |
| 39 | free_page((unsigned long)pgd); |
| 40 | } |
| 41 | |
| 42 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, |
| 43 | unsigned long address) |
| 44 | { |
| 45 | pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | |
| 46 | __GFP_ZERO); |
| 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 | pte = alloc_pages(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO, 0); |
Kirill A. Shutemov | 855a305 | 2013-11-14 14:31:35 -0800 | [diff] [blame] | 55 | if (!pte) |
| 56 | return NULL; |
| 57 | if (!pgtable_page_ctor(pte)) { |
| 58 | __free_page(pte); |
| 59 | return NULL; |
| 60 | } |
James Hogan | f5df8e2 | 2012-10-09 10:54:17 +0100 | [diff] [blame] | 61 | return pte; |
| 62 | } |
| 63 | |
| 64 | static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) |
| 65 | { |
| 66 | free_page((unsigned long)pte); |
| 67 | } |
| 68 | |
| 69 | static inline void pte_free(struct mm_struct *mm, pgtable_t pte) |
| 70 | { |
| 71 | pgtable_page_dtor(pte); |
| 72 | __free_page(pte); |
| 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 |