Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
pgtable.c
Go to the documentation of this file.
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 <[email protected]>
8  * Chen Liqin <[email protected]>
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 
49 {
50  /* Initialize the entire pgd. */
51  pgd_init((unsigned long)swapper_pg_dir);
52 }