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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 | /* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 1999, 2000 by Silicon Graphics * Copyright (C) 2003 by Ralf Baechle */ #include <linux/export.h> #include <linux/init.h> #include <linux/mm.h> #include <asm/fixmap.h> #include <asm/pgalloc.h> #include <asm/tlbflush.h> void pgd_init(void *addr) { unsigned long *p, *end; unsigned long entry; #if !defined(__PAGETABLE_PUD_FOLDED) entry = (unsigned long)invalid_pud_table; #elif !defined(__PAGETABLE_PMD_FOLDED) entry = (unsigned long)invalid_pmd_table; #else entry = (unsigned long)invalid_pte_table; #endif p = (unsigned long *) addr; end = p + PTRS_PER_PGD; do { p[0] = entry; p[1] = entry; p[2] = entry; p[3] = entry; p[4] = entry; p += 8; p[-3] = entry; p[-2] = entry; p[-1] = entry; } while (p != end); } #ifndef __PAGETABLE_PMD_FOLDED void pmd_init(void *addr) { unsigned long *p, *end; unsigned long pagetable = (unsigned long)invalid_pte_table; p = (unsigned long *)addr; end = p + PTRS_PER_PMD; do { p[0] = pagetable; p[1] = pagetable; p[2] = pagetable; p[3] = pagetable; p[4] = pagetable; p += 8; p[-3] = pagetable; p[-2] = pagetable; p[-1] = pagetable; } while (p != end); } EXPORT_SYMBOL_GPL(pmd_init); #endif #ifndef __PAGETABLE_PUD_FOLDED void pud_init(void *addr) { unsigned long *p, *end; unsigned long pagetable = (unsigned long)invalid_pmd_table; p = (unsigned long *)addr; end = p + PTRS_PER_PUD; do { p[0] = pagetable; p[1] = pagetable; p[2] = pagetable; p[3] = pagetable; p[4] = pagetable; p += 8; p[-3] = pagetable; p[-2] = pagetable; p[-1] = pagetable; } while (p != end); } #endif #ifdef CONFIG_TRANSPARENT_HUGEPAGE pmd_t mk_pmd(struct page *page, pgprot_t prot) { pmd_t pmd; pmd_val(pmd) = (page_to_pfn(page) << PFN_PTE_SHIFT) | pgprot_val(prot); return pmd; } void set_pmd_at(struct mm_struct *mm, unsigned long addr, pmd_t *pmdp, pmd_t pmd) { *pmdp = pmd; } #endif void __init pagetable_init(void) { unsigned long vaddr; pgd_t *pgd_base; /* Initialize the entire pgd. */ pgd_init(swapper_pg_dir); #ifndef __PAGETABLE_PUD_FOLDED pud_init(invalid_pud_table); #endif #ifndef __PAGETABLE_PMD_FOLDED pmd_init(invalid_pmd_table); #endif pgd_base = swapper_pg_dir; /* * Fixed mappings: */ vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK; fixrange_init(vaddr, vaddr + FIXADDR_SIZE, pgd_base); } |