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124 lines
2.5 KiB
124 lines
2.5 KiB
/* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file "COPYING" in the main directory of this archive |
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* for more details. |
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* |
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* Copyright (C) 1999, 2000 by Silicon Graphics |
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* Copyright (C) 2003 by Ralf Baechle |
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*/ |
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#include <linux/export.h> |
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#include <linux/init.h> |
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#include <linux/mm.h> |
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#include <asm/fixmap.h> |
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#include <asm/pgalloc.h> |
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#include <asm/tlbflush.h> |
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void pgd_init(unsigned long page) |
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{ |
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unsigned long *p, *end; |
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unsigned long entry; |
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#if !defined(__PAGETABLE_PUD_FOLDED) |
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entry = (unsigned long)invalid_pud_table; |
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#elif !defined(__PAGETABLE_PMD_FOLDED) |
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entry = (unsigned long)invalid_pmd_table; |
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#else |
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entry = (unsigned long)invalid_pte_table; |
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#endif |
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p = (unsigned long *) page; |
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end = p + PTRS_PER_PGD; |
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do { |
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p[0] = entry; |
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p[1] = entry; |
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p[2] = entry; |
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p[3] = entry; |
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p[4] = entry; |
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p += 8; |
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p[-3] = entry; |
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p[-2] = entry; |
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p[-1] = entry; |
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} while (p != end); |
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} |
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#ifndef __PAGETABLE_PMD_FOLDED |
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void pmd_init(unsigned long addr, unsigned long pagetable) |
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{ |
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unsigned long *p, *end; |
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p = (unsigned long *) addr; |
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end = p + PTRS_PER_PMD; |
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do { |
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p[0] = pagetable; |
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p[1] = pagetable; |
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p[2] = pagetable; |
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p[3] = pagetable; |
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p[4] = pagetable; |
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p += 8; |
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p[-3] = pagetable; |
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p[-2] = pagetable; |
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p[-1] = pagetable; |
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} while (p != end); |
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} |
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EXPORT_SYMBOL_GPL(pmd_init); |
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#endif |
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#ifndef __PAGETABLE_PUD_FOLDED |
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void pud_init(unsigned long addr, unsigned long pagetable) |
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{ |
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unsigned long *p, *end; |
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p = (unsigned long *)addr; |
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end = p + PTRS_PER_PUD; |
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do { |
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p[0] = pagetable; |
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p[1] = pagetable; |
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p[2] = pagetable; |
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p[3] = pagetable; |
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p[4] = pagetable; |
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p += 8; |
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p[-3] = pagetable; |
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p[-2] = pagetable; |
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p[-1] = pagetable; |
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} while (p != end); |
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} |
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#endif |
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pmd_t mk_pmd(struct page *page, pgprot_t prot) |
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{ |
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pmd_t pmd; |
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pmd_val(pmd) = (page_to_pfn(page) << _PFN_SHIFT) | pgprot_val(prot); |
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return pmd; |
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} |
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void set_pmd_at(struct mm_struct *mm, unsigned long addr, |
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pmd_t *pmdp, pmd_t pmd) |
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{ |
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*pmdp = pmd; |
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} |
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void __init pagetable_init(void) |
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{ |
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unsigned long vaddr; |
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pgd_t *pgd_base; |
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/* Initialize the entire pgd. */ |
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pgd_init((unsigned long)swapper_pg_dir); |
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#ifndef __PAGETABLE_PUD_FOLDED |
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pud_init((unsigned long)invalid_pud_table, (unsigned long)invalid_pmd_table); |
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#endif |
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#ifndef __PAGETABLE_PMD_FOLDED |
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pmd_init((unsigned long)invalid_pmd_table, (unsigned long)invalid_pte_table); |
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#endif |
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pgd_base = swapper_pg_dir; |
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/* |
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* Fixed mappings: |
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*/ |
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vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK; |
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fixrange_init(vaddr, vaddr + FIXADDR_SIZE, pgd_base); |
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}
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