| 1 | #ifndef __ASM_SH_PGALLOC_H
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| 2 | #define __ASM_SH_PGALLOC_H
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| 3 |
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| 4 | #include <linux/threads.h>
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| 5 | #include <linux/slab.h>
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| 6 | #include <linux/mm.h>
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| 7 |
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| 8 | #define pgd_quicklist ((unsigned long *)0)
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| 9 | #define pmd_quicklist ((unsigned long *)0)
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| 10 | #define pte_quicklist ((unsigned long *)0)
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| 11 | #define pgtable_cache_size 0L
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| 12 |
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| 13 | #define pmd_populate_kernel(mm, pmd, pte) \
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| 14 | set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
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| 15 |
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| 16 | static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
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| 17 | struct page *pte)
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| 18 | {
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| 19 | set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte)));
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| 20 | }
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| 21 |
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| 22 | |
| 23 | * Allocate and free page tables.
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| 24 |
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| 25 | static inline pgd_t *pgd_alloc(struct mm_struct *mm)
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| 26 | {
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| 27 | unsigned int pgd_size = (USER_PTRS_PER_PGD * sizeof(pgd_t));
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| 28 | pgd_t *pgd = (pgd_t *)kmalloc(pgd_size, GFP_KERNEL);
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| 29 |
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| 30 | if (pgd)
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| 31 | memset(pgd, 0, pgd_size);
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| 32 |
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| 33 | return pgd;
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| 34 | }
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| 35 |
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| 36 | static inline void pgd_free(pgd_t *pgd)
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| 37 | {
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| 38 | kfree(pgd);
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| 39 | }
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| 40 |
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| 41 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
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| 42 | unsigned long address)
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| 43 | {
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| 44 | pte_t *pte;
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| 45 |
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| 46 | pte = (pte_t *) __get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
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| 47 |
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| 48 | return pte;
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| 49 | }
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| 50 |
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| 51 | static inline struct page *pte_alloc_one(struct mm_struct *mm,
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| 52 | unsigned long address)
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| 53 | {
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| 54 | struct page *pte;
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| 55 |
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| 56 | pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
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| 57 |
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| 58 | return pte;
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| 59 | }
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| 60 |
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| 61 | static inline void pte_free_kernel(pte_t *pte)
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| 62 | {
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| 63 | free_page((unsigned long)pte);
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| 64 | }
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| 65 |
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| 66 | static inline void pte_free(struct page *pte)
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| 67 | {
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| 68 | __free_page(pte);
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| 69 | }
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| 70 |
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| 71 | #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
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| 72 |
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| 73 | |
| 74 | * allocating and freeing a pmd is trivial: the 1-entry pmd is
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| 75 | * inside the pgd, so has no extra memory associated with it.
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| 76 |
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| 77 |
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| 78 | #define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); })
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| 79 | #define pmd_free(x) do { } while (0)
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| 80 | #define __pmd_free_tlb(tlb,x) do { } while (0)
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| 81 | #define pgd_populate(mm, pmd, pte) BUG()
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| 82 | #define check_pgt_cache() do { } while (0)
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| 83 |
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| 84 | #ifdef CONFIG_CPU_SH4
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| 85 | #define PG_mapped PG_arch_1
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| 86 | #endif
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| 87 |
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| 88 | #endif
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