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- /*
- * 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) 2003 by Ralf Baechle
- */
- #include <linux/init.h>
- #include <linux/mm.h>
- #include <linux/memblock.h>
- #include <linux/highmem.h>
- #include <asm/fixmap.h>
- #include <asm/pgalloc.h>
- #include <asm/tlbflush.h>
- void pgd_init(unsigned long page)
- {
- unsigned long *p = (unsigned long *) page;
- int i;
- for (i = 0; i < USER_PTRS_PER_PGD; i+=8) {
- p[i + 0] = (unsigned long) invalid_pte_table;
- p[i + 1] = (unsigned long) invalid_pte_table;
- p[i + 2] = (unsigned long) invalid_pte_table;
- p[i + 3] = (unsigned long) invalid_pte_table;
- p[i + 4] = (unsigned long) invalid_pte_table;
- p[i + 5] = (unsigned long) invalid_pte_table;
- p[i + 6] = (unsigned long) invalid_pte_table;
- p[i + 7] = (unsigned long) invalid_pte_table;
- }
- }
- #if defined(CONFIG_TRANSPARENT_HUGEPAGE)
- pmd_t mk_pmd(struct page *page, pgprot_t prot)
- {
- pmd_t pmd;
- pmd_val(pmd) = (page_to_pfn(page) << _PFN_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 /* defined(CONFIG_TRANSPARENT_HUGEPAGE) */
- void __init pagetable_init(void)
- {
- unsigned long vaddr;
- pgd_t *pgd_base;
- #ifdef CONFIG_HIGHMEM
- pgd_t *pgd;
- p4d_t *p4d;
- pud_t *pud;
- pmd_t *pmd;
- pte_t *pte;
- #endif
- /* Initialize the entire pgd. */
- pgd_init((unsigned long)swapper_pg_dir);
- pgd_init((unsigned long)swapper_pg_dir
- + sizeof(pgd_t) * USER_PTRS_PER_PGD);
- pgd_base = swapper_pg_dir;
- /*
- * Fixed mappings:
- */
- vaddr = __fix_to_virt(__end_of_fixed_addresses - 1);
- fixrange_init(vaddr & PMD_MASK, vaddr + FIXADDR_SIZE, pgd_base);
- #ifdef CONFIG_HIGHMEM
- /*
- * Permanent kmaps:
- */
- vaddr = PKMAP_BASE;
- fixrange_init(vaddr & PMD_MASK, vaddr + PAGE_SIZE*LAST_PKMAP, pgd_base);
- pgd = swapper_pg_dir + pgd_index(vaddr);
- p4d = p4d_offset(pgd, vaddr);
- pud = pud_offset(p4d, vaddr);
- pmd = pmd_offset(pud, vaddr);
- pte = pte_offset_kernel(pmd, vaddr);
- pkmap_page_table = pte;
- #endif
- }
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