The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/arch/score/mm/pgtable.c

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    1 /*
    2  * arch/score/mm/pgtable-32.c
    3  *
    4  * Score Processor version.
    5  *
    6  * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
    7  *  Lennox Wu <lennox.wu@sunplusct.com>
    8  *  Chen Liqin <liqin.chen@sunplusct.com>
    9  *
   10  * This program is free software; you can redistribute it and/or modify
   11  * it under the terms of the GNU General Public License as published by
   12  * the Free Software Foundation; either version 2 of the License, or
   13  * (at your option) any later version.
   14  *
   15  * This program is distributed in the hope that it will be useful,
   16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   18  * GNU General Public License for more details.
   19  *
   20  * You should have received a copy of the GNU General Public License
   21  * along with this program; if not, see the file COPYING, or write
   22  * to the Free Software Foundation, Inc.,
   23  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
   24  */
   25 
   26 #include <linux/bootmem.h>
   27 #include <linux/init.h>
   28 #include <linux/pfn.h>
   29 #include <linux/mm.h>
   30 
   31 void pgd_init(unsigned long page)
   32 {
   33         unsigned long *p = (unsigned long *) page;
   34         int i;
   35 
   36         for (i = 0; i < USER_PTRS_PER_PGD; i += 8) {
   37                 p[i + 0] = (unsigned long) invalid_pte_table;
   38                 p[i + 1] = (unsigned long) invalid_pte_table;
   39                 p[i + 2] = (unsigned long) invalid_pte_table;
   40                 p[i + 3] = (unsigned long) invalid_pte_table;
   41                 p[i + 4] = (unsigned long) invalid_pte_table;
   42                 p[i + 5] = (unsigned long) invalid_pte_table;
   43                 p[i + 6] = (unsigned long) invalid_pte_table;
   44                 p[i + 7] = (unsigned long) invalid_pte_table;
   45         }
   46 }
   47 
   48 void __init pagetable_init(void)
   49 {
   50         /* Initialize the entire pgd. */
   51         pgd_init((unsigned long)swapper_pg_dir);
   52 }

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