| 1 |
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| 2 | |
| 3 | * Based on arch/arm/include/asm/pgalloc.h
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| 4 | *
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| 5 | * Copyright (C) 2000-2001 Russell King
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| 6 | * Copyright (C) 2012 ARM Ltd.
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| 7 |
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| 8 | #ifndef __ASM_PGALLOC_H
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| 9 | #define __ASM_PGALLOC_H
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| 10 |
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| 11 | #include <asm/pgtable-hwdef.h>
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| 12 | #include <asm/processor.h>
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| 13 | #include <asm/cacheflush.h>
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| 14 | #include <asm/tlbflush.h>
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| 15 |
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| 16 | #define __HAVE_ARCH_PGD_FREE
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| 17 | #define __HAVE_ARCH_PUD_FREE
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| 18 | #include <asm-generic/pgalloc.h>
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| 19 |
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| 20 | #define PGD_SIZE (PTRS_PER_PGD * sizeof(pgd_t))
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| 21 |
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| 22 | #if CONFIG_PGTABLE_LEVELS > 2
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| 23 |
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| 24 | static inline void __pud_populate(pud_t *pudp, phys_addr_t pmdp, pudval_t prot)
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| 25 | {
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| 26 | set_pud(pudp, __pud(__phys_to_pud_val(pmdp) | prot));
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| 27 | }
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| 28 |
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| 29 | static inline void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmdp)
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| 30 | {
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| 31 | pudval_t pudval = PUD_TYPE_TABLE | PUD_TABLE_AF;
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| 32 |
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| 33 | pudval |= (mm == &init_mm) ? PUD_TABLE_UXN : PUD_TABLE_PXN;
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| 34 | __pud_populate(pudp, __pa(pmdp), pudval);
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| 35 | }
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| 36 | #else
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| 37 | static inline void __pud_populate(pud_t *pudp, phys_addr_t pmdp, pudval_t prot)
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| 38 | {
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| 39 | BUILD_BUG();
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| 40 | }
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| 41 | #endif
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| 42 |
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| 43 | #if CONFIG_PGTABLE_LEVELS > 3
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| 44 |
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| 45 | static inline void __p4d_populate(p4d_t *p4dp, phys_addr_t pudp, p4dval_t prot)
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| 46 | {
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| 47 | if (pgtable_l4_enabled())
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| 48 | set_p4d(p4dp, __p4d(__phys_to_p4d_val(pudp) | prot));
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| 49 | }
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| 50 |
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| 51 | static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4dp, pud_t *pudp)
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| 52 | {
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| 53 | p4dval_t p4dval = P4D_TYPE_TABLE | P4D_TABLE_AF;
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| 54 |
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| 55 | p4dval |= (mm == &init_mm) ? P4D_TABLE_UXN : P4D_TABLE_PXN;
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| 56 | __p4d_populate(p4dp, __pa(pudp), p4dval);
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| 57 | }
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| 58 |
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| 59 | static inline void pud_free(struct mm_struct *mm, pud_t *pud)
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| 60 | {
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| 61 | if (!pgtable_l4_enabled())
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| 62 | return;
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| 63 | __pud_free(mm, pud);
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| 64 | }
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| 65 | #else
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| 66 | static inline void __p4d_populate(p4d_t *p4dp, phys_addr_t pudp, p4dval_t prot)
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| 67 | {
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| 68 | BUILD_BUG();
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| 69 | }
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| 70 | #endif
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| 71 |
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| 72 | #if CONFIG_PGTABLE_LEVELS > 4
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| 73 |
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| 74 | static inline void __pgd_populate(pgd_t *pgdp, phys_addr_t p4dp, pgdval_t prot)
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| 75 | {
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| 76 | if (pgtable_l5_enabled())
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| 77 | set_pgd(pgdp, __pgd(__phys_to_pgd_val(p4dp) | prot));
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| 78 | }
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| 79 |
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| 80 | static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgdp, p4d_t *p4dp)
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| 81 | {
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| 82 | pgdval_t pgdval = PGD_TYPE_TABLE | PGD_TABLE_AF;
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| 83 |
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| 84 | pgdval |= (mm == &init_mm) ? PGD_TABLE_UXN : PGD_TABLE_PXN;
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| 85 | __pgd_populate(pgdp, __pa(p4dp), pgdval);
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| 86 | }
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| 87 |
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| 88 | #else
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| 89 | static inline void __pgd_populate(pgd_t *pgdp, phys_addr_t p4dp, pgdval_t prot)
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| 90 | {
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| 91 | BUILD_BUG();
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| 92 | }
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| 93 | #endif
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| 94 |
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| 95 | extern pgd_t *pgd_alloc(struct mm_struct *mm);
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| 96 | extern void pgd_free(struct mm_struct *mm, pgd_t *pgdp);
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| 97 |
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| 98 | static inline void __pmd_populate(pmd_t *pmdp, phys_addr_t ptep,
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| 99 | pmdval_t prot)
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| 100 | {
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| 101 | set_pmd(pmdp, __pmd(__phys_to_pmd_val(ptep) | prot));
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| 102 | }
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| 103 |
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| 104 | |
| 105 | * Populate the pmdp entry with a pointer to the pte. This pmd is part
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| 106 | * of the mm address space.
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| 107 |
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| 108 | static inline void
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| 109 | pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
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| 110 | {
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| 111 | VM_BUG_ON(mm && mm != &init_mm);
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| 112 | __pmd_populate(pmdp, __pa(ptep),
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| 113 | PMD_TYPE_TABLE | PMD_TABLE_AF | PMD_TABLE_UXN);
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| 114 | }
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| 115 |
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| 116 | static inline void
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| 117 | pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep)
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| 118 | {
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| 119 | VM_BUG_ON(mm == &init_mm);
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| 120 | __pmd_populate(pmdp, page_to_phys(ptep),
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| 121 | PMD_TYPE_TABLE | PMD_TABLE_AF | PMD_TABLE_PXN);
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| 122 | }
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| 123 |
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| 124 | #endif
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