projects / mirror_ubuntu-kernels.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| f5df8e26 JH |
2 | #ifndef _METAG_PGALLOC_H |
| 3 | #define _METAG_PGALLOC_H | |
| 4 | ||
| 5 | #include <linux/threads.h> | |
| 6 | #include <linux/mm.h> | |
| 7 | ||
| 8 | #define pmd_populate_kernel(mm, pmd, pte) \ | |
| 9 | set_pmd(pmd, __pmd(_PAGE_TABLE | __pa(pte))) | |
| 10 | ||
| 11 | #define pmd_populate(mm, pmd, pte) \ | |
| 12 | set_pmd(pmd, __pmd(_PAGE_TABLE | page_to_phys(pte))) | |
| 13 | ||
| 14 | #define pmd_pgtable(pmd) pmd_page(pmd) | |
| 15 | ||
| 16 | /* | |
| 17 | * Allocate and free page tables. | |
| 18 | */ | |
| 19 | #ifdef CONFIG_METAG_META21_MMU | |
| 20 | static inline void pgd_ctor(pgd_t *pgd) | |
| 21 | { | |
| 22 | memcpy(pgd + USER_PTRS_PER_PGD, | |
| 23 | swapper_pg_dir + USER_PTRS_PER_PGD, | |
| 24 | (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t)); | |
| 25 | } | |
| 26 | #else | |
| 27 | #define pgd_ctor(x) do { } while (0) | |
| 28 | #endif | |
| 29 | ||
| 30 | static inline pgd_t *pgd_alloc(struct mm_struct *mm) | |
| 31 | { | |
| 32 | pgd_t *pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL); | |
| 33 | if (pgd) | |
| 34 | pgd_ctor(pgd); | |
| 35 | return pgd; | |
| 36 | } | |
| 37 | ||
| 38 | static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) | |
| 39 | { | |
| 40 | free_page((unsigned long)pgd); | |
| 41 | } | |
| 42 | ||
| 43 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, | |
| 44 | unsigned long address) | |
| 45 | { | |
| 32d6bd90 | 46 | pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO); |
| f5df8e26 JH |
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; | |
| 32d6bd90 | 54 | pte = alloc_pages(GFP_KERNEL | __GFP_ZERO, 0); |
| 855a3053 KS |
55 | if (!pte) |
| 56 | return NULL; | |
| 57 | if (!pgtable_page_ctor(pte)) { | |
| 58 | __free_page(pte); | |
| 59 | return NULL; | |
| 60 | } | |
| f5df8e26 JH |
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 |