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pgtable-64.c

/*
 * 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/init.h>
#include <linux/mm.h>
#include <asm/fixmap.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>

void pgd_init(unsigned long page)
{
      unsigned long *p, *end;

      p = (unsigned long *) page;
      end = p + PTRS_PER_PGD;

      while (p < end) {
            p[0] = (unsigned long) invalid_pmd_table;
            p[1] = (unsigned long) invalid_pmd_table;
            p[2] = (unsigned long) invalid_pmd_table;
            p[3] = (unsigned long) invalid_pmd_table;
            p[4] = (unsigned long) invalid_pmd_table;
            p[5] = (unsigned long) invalid_pmd_table;
            p[6] = (unsigned long) invalid_pmd_table;
            p[7] = (unsigned long) invalid_pmd_table;
            p += 8;
      }
}

void pmd_init(unsigned long addr, unsigned long pagetable)
{
      unsigned long *p, *end;

      p = (unsigned long *) addr;
      end = p + PTRS_PER_PMD;

      while (p < end) {
            p[0] = (unsigned long)pagetable;
            p[1] = (unsigned long)pagetable;
            p[2] = (unsigned long)pagetable;
            p[3] = (unsigned long)pagetable;
            p[4] = (unsigned long)pagetable;
            p[5] = (unsigned long)pagetable;
            p[6] = (unsigned long)pagetable;
            p[7] = (unsigned long)pagetable;
            p += 8;
      }
}

void __init pagetable_init(void)
{
      unsigned long vaddr;
      pgd_t *pgd_base;

      /* Initialize the entire pgd.  */
      pgd_init((unsigned long)swapper_pg_dir);
#ifdef MODULE_START
      pgd_init((unsigned long)module_pg_dir);
#endif
      pmd_init((unsigned long)invalid_pmd_table, (unsigned long)invalid_pte_table);

      pgd_base = swapper_pg_dir;
      /*
       * Fixed mappings:
       */
      vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
      fixrange_init(vaddr, 0, pgd_base);
}

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