| 1 |
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| 2 | #ifndef M68K_MCF_PGALLOC_H
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| 3 | #define M68K_MCF_PGALLOC_H
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| 4 |
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| 5 | #include <asm/tlb.h>
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| 6 | #include <asm/tlbflush.h>
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| 7 |
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| 8 | static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
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| 9 | {
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| 10 | pagetable_dtor_free(virt_to_ptdesc(pte));
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| 11 | }
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| 12 |
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| 13 | extern const char bad_pmd_string[];
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| 14 |
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| 15 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
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| 16 | {
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| 17 | struct ptdesc *ptdesc = pagetable_alloc((GFP_DMA | __GFP_ZERO) &
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| 18 | ~__GFP_HIGHMEM, 0);
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| 19 |
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| 20 | if (!ptdesc)
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| 21 | return NULL;
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| 22 | if (!pagetable_pte_ctor(mm, ptdesc)) {
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| 23 | pagetable_free(ptdesc);
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| 24 | return NULL;
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| 25 | }
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| 26 |
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| 27 | return ptdesc_address(ptdesc);
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| 28 | }
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| 29 |
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| 30 | extern inline pmd_t *pmd_alloc_kernel(pgd_t *pgd, unsigned long address)
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| 31 | {
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| 32 | return (pmd_t *) pgd;
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| 33 | }
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| 34 |
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| 35 | #define pmd_populate(mm, pmd, pte) (pmd_val(*pmd) = (unsigned long)(pte))
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| 36 |
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| 37 | #define pmd_populate_kernel pmd_populate
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| 38 |
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| 39 | static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pgtable,
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| 40 | unsigned long address)
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| 41 | {
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| 42 | struct ptdesc *ptdesc = virt_to_ptdesc(pgtable);
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| 43 |
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| 44 | pagetable_dtor(ptdesc);
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| 45 | pagetable_free(ptdesc);
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| 46 | }
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| 47 |
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| 48 | static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
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| 49 | {
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| 50 | struct ptdesc *ptdesc = pagetable_alloc(GFP_DMA | __GFP_ZERO, 0);
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| 51 | pte_t *pte;
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| 52 |
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| 53 | if (!ptdesc)
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| 54 | return NULL;
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| 55 | if (!pagetable_pte_ctor(mm, ptdesc)) {
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| 56 | pagetable_free(ptdesc);
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| 57 | return NULL;
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| 58 | }
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| 59 |
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| 60 | pte = ptdesc_address(ptdesc);
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| 61 | return pte;
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| 62 | }
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| 63 |
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| 64 | static inline void pte_free(struct mm_struct *mm, pgtable_t pgtable)
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| 65 | {
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| 66 | struct ptdesc *ptdesc = virt_to_ptdesc(pgtable);
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| 67 |
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| 68 | pagetable_dtor(ptdesc);
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| 69 | pagetable_free(ptdesc);
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| 70 | }
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| 71 |
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| 72 | |
| 73 | * In our implementation, each pgd entry contains 1 pmd that is never allocated
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| 74 | * or freed. pgd_present is always 1, so this should never be called. -NL
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| 75 |
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| 76 | #define pmd_free(mm, pmd) BUG()
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| 77 |
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| 78 | static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
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| 79 | {
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| 80 | pagetable_dtor_free(virt_to_ptdesc(pgd));
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| 81 | }
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| 82 |
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| 83 | static inline pgd_t *pgd_alloc(struct mm_struct *mm)
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| 84 | {
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| 85 | pgd_t *new_pgd;
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| 86 | struct ptdesc *ptdesc = pagetable_alloc((GFP_DMA | __GFP_NOWARN) &
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| 87 | ~__GFP_HIGHMEM, 0);
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| 88 |
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| 89 | if (!ptdesc)
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| 90 | return NULL;
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| 91 | pagetable_pgd_ctor(ptdesc);
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| 92 | new_pgd = ptdesc_address(ptdesc);
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| 93 |
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| 94 | memcpy(new_pgd, swapper_pg_dir, PTRS_PER_PGD * sizeof(pgd_t));
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| 95 | memset(new_pgd, 0, PAGE_OFFSET >> PGDIR_SHIFT);
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| 96 | return new_pgd;
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| 97 | }
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| 98 |
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| 99 | #endif
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