| 1 | |
| 2 | * This file is subject to the terms and conditions of the GNU General Public
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| 3 | * License. See the file "COPYING" in the main directory of this archive
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| 4 | * for more details.
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| 5 | *
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| 6 | * Copyright (C) 1994 - 2001, 2003 by Ralf Baechle
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| 7 | * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc.
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| 8 |
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| 9 | #ifndef _ASM_PGALLOC_H
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| 10 | #define _ASM_PGALLOC_H
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| 11 |
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| 12 | #include <linux/highmem.h>
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| 13 | #include <linux/mm.h>
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| 14 | #include <linux/sched.h>
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| 15 |
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| 16 | #define __HAVE_ARCH_PMD_ALLOC_ONE
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| 17 | #define __HAVE_ARCH_PUD_ALLOC_ONE
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| 18 | #include <asm-generic/pgalloc.h>
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| 19 |
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| 20 | static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
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| 21 | pte_t *pte)
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| 22 | {
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| 23 | set_pmd(pmd, __pmd((unsigned long)pte));
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| 24 | }
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| 25 |
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| 26 | static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
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| 27 | pgtable_t pte)
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| 28 | {
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| 29 | set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
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| 30 | }
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| 31 |
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| 32 | |
| 33 | * Initialize a new pmd table with invalid pointers.
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| 34 |
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| 35 | extern void pmd_init(void *addr);
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| 36 |
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| 37 | #ifndef __PAGETABLE_PMD_FOLDED
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| 38 |
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| 39 | static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
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| 40 | {
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| 41 | set_pud(pud, __pud((unsigned long)pmd));
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| 42 | }
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| 43 | #endif
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| 44 |
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| 45 | |
| 46 | * Initialize a new pgd table with invalid pointers.
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| 47 |
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| 48 | extern void pgd_init(void *addr);
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| 49 | extern pgd_t *pgd_alloc(struct mm_struct *mm);
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| 50 |
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| 51 | #define __pte_free_tlb(tlb, pte, address) tlb_remove_ptdesc((tlb), page_ptdesc(pte))
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| 52 |
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| 53 | #ifndef __PAGETABLE_PMD_FOLDED
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| 54 |
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| 55 | static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
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| 56 | {
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| 57 | pmd_t *pmd;
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| 58 | struct ptdesc *ptdesc;
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| 59 |
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| 60 | ptdesc = pagetable_alloc(GFP_KERNEL_ACCOUNT, PMD_TABLE_ORDER);
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| 61 | if (!ptdesc)
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| 62 | return NULL;
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| 63 |
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| 64 | if (!pagetable_pmd_ctor(mm, ptdesc)) {
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| 65 | pagetable_free(ptdesc);
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| 66 | return NULL;
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| 67 | }
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| 68 |
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| 69 | pmd = ptdesc_address(ptdesc);
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| 70 | pmd_init(pmd);
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| 71 | return pmd;
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| 72 | }
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| 73 |
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| 74 | #define __pmd_free_tlb(tlb, x, addr) tlb_remove_ptdesc((tlb), virt_to_ptdesc(x))
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| 75 |
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| 76 | #endif
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| 77 |
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| 78 | #ifndef __PAGETABLE_PUD_FOLDED
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| 79 |
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| 80 | static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
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| 81 | {
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| 82 | pud_t *pud;
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| 83 | struct ptdesc *ptdesc = pagetable_alloc(GFP_KERNEL, PUD_TABLE_ORDER);
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| 84 |
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| 85 | if (!ptdesc)
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| 86 | return NULL;
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| 87 | pagetable_pud_ctor(ptdesc);
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| 88 | pud = ptdesc_address(ptdesc);
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| 89 |
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| 90 | pud_init(pud);
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| 91 | return pud;
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| 92 | }
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| 93 |
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| 94 | static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
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| 95 | {
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| 96 | set_p4d(p4d, __p4d((unsigned long)pud));
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| 97 | }
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| 98 |
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| 99 | #define __pud_free_tlb(tlb, x, addr) tlb_remove_ptdesc((tlb), virt_to_ptdesc(x))
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| 100 |
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| 101 | #endif
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| 102 |
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| 103 | #endif
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