| Aneesh Kumar K.V | 75a9b8a | 2016-04-29 23:26:14 +1000 | [diff] [blame^] | 1 | #ifndef _ASM_POWERPC_BOOK3S_32_PGALLOC_H |
| 2 | #define _ASM_POWERPC_BOOK3S_32_PGALLOC_H |
| Aneesh Kumar K.V | 101ad5c | 2016-04-29 23:26:13 +1000 | [diff] [blame] | 3 | |
| 4 | #include <linux/threads.h> |
| 5 | |
| 6 | /* For 32-bit, all levels of page tables are just drawn from get_free_page() */ |
| 7 | #define MAX_PGTABLE_INDEX_SIZE 0 |
| 8 | |
| 9 | extern void __bad_pte(pmd_t *pmd); |
| 10 | |
| 11 | extern pgd_t *pgd_alloc(struct mm_struct *mm); |
| 12 | extern void pgd_free(struct mm_struct *mm, pgd_t *pgd); |
| 13 | |
| 14 | /* |
| 15 | * We don't have any real pmd's, and this code never triggers because |
| 16 | * the pgd will always be present.. |
| 17 | */ |
| 18 | /* #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) */ |
| 19 | #define pmd_free(mm, x) do { } while (0) |
| 20 | #define __pmd_free_tlb(tlb,x,a) do { } while (0) |
| 21 | /* #define pgd_populate(mm, pmd, pte) BUG() */ |
| 22 | |
| 23 | #ifndef CONFIG_BOOKE |
| 24 | |
| 25 | static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, |
| 26 | pte_t *pte) |
| 27 | { |
| 28 | *pmdp = __pmd(__pa(pte) | _PMD_PRESENT); |
| 29 | } |
| 30 | |
| 31 | static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmdp, |
| 32 | pgtable_t pte_page) |
| 33 | { |
| 34 | *pmdp = __pmd((page_to_pfn(pte_page) << PAGE_SHIFT) | _PMD_PRESENT); |
| 35 | } |
| 36 | |
| 37 | #define pmd_pgtable(pmd) pmd_page(pmd) |
| 38 | #else |
| 39 | |
| 40 | static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, |
| 41 | pte_t *pte) |
| 42 | { |
| 43 | *pmdp = __pmd((unsigned long)pte | _PMD_PRESENT); |
| 44 | } |
| 45 | |
| 46 | static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmdp, |
| 47 | pgtable_t pte_page) |
| 48 | { |
| 49 | *pmdp = __pmd((unsigned long)lowmem_page_address(pte_page) | _PMD_PRESENT); |
| 50 | } |
| 51 | |
| 52 | #define pmd_pgtable(pmd) pmd_page(pmd) |
| 53 | #endif |
| 54 | |
| 55 | extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr); |
| 56 | extern pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr); |
| 57 | |
| 58 | static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) |
| 59 | { |
| 60 | free_page((unsigned long)pte); |
| 61 | } |
| 62 | |
| 63 | static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage) |
| 64 | { |
| 65 | pgtable_page_dtor(ptepage); |
| 66 | __free_page(ptepage); |
| 67 | } |
| 68 | |
| 69 | static inline void pgtable_free(void *table, unsigned index_size) |
| 70 | { |
| 71 | BUG_ON(index_size); /* 32-bit doesn't use this */ |
| 72 | free_page((unsigned long)table); |
| 73 | } |
| 74 | |
| 75 | #define check_pgt_cache() do { } while (0) |
| 76 | |
| 77 | #ifdef CONFIG_SMP |
| 78 | static inline void pgtable_free_tlb(struct mmu_gather *tlb, |
| 79 | void *table, int shift) |
| 80 | { |
| 81 | unsigned long pgf = (unsigned long)table; |
| 82 | BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE); |
| 83 | pgf |= shift; |
| 84 | tlb_remove_table(tlb, (void *)pgf); |
| 85 | } |
| 86 | |
| 87 | static inline void __tlb_remove_table(void *_table) |
| 88 | { |
| 89 | void *table = (void *)((unsigned long)_table & ~MAX_PGTABLE_INDEX_SIZE); |
| 90 | unsigned shift = (unsigned long)_table & MAX_PGTABLE_INDEX_SIZE; |
| 91 | |
| 92 | pgtable_free(table, shift); |
| 93 | } |
| 94 | #else |
| 95 | static inline void pgtable_free_tlb(struct mmu_gather *tlb, |
| 96 | void *table, int shift) |
| 97 | { |
| 98 | pgtable_free(table, shift); |
| 99 | } |
| 100 | #endif |
| 101 | |
| 102 | static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table, |
| 103 | unsigned long address) |
| 104 | { |
| 105 | tlb_flush_pgtable(tlb, address); |
| 106 | pgtable_page_dtor(table); |
| 107 | pgtable_free_tlb(tlb, page_address(table), 0); |
| 108 | } |
| Aneesh Kumar K.V | 75a9b8a | 2016-04-29 23:26:14 +1000 | [diff] [blame^] | 109 | #endif /* _ASM_POWERPC_BOOK3S_32_PGALLOC_H */ |