Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus
[linux-2.6.git] / arch / mips / mm / pgtable-64.c
1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License.  See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * Copyright (C) 1999, 2000 by Silicon Graphics
7  * Copyright (C) 2003 by Ralf Baechle
8  */
9 #include <linux/init.h>
10 #include <linux/mm.h>
11 #include <asm/fixmap.h>
12 #include <asm/pgtable.h>
13 #include <asm/pgalloc.h>
14
15 void pgd_init(unsigned long page)
16 {
17         unsigned long *p, *end;
18         unsigned long entry;
19
20 #ifdef __PAGETABLE_PMD_FOLDED
21         entry = (unsigned long)invalid_pte_table;
22 #else
23         entry = (unsigned long)invalid_pmd_table;
24 #endif
25
26         p = (unsigned long *) page;
27         end = p + PTRS_PER_PGD;
28
29         while (p < end) {
30                 p[0] = entry;
31                 p[1] = entry;
32                 p[2] = entry;
33                 p[3] = entry;
34                 p[4] = entry;
35                 p[5] = entry;
36                 p[6] = entry;
37                 p[7] = entry;
38                 p += 8;
39         }
40 }
41
42 #ifndef __PAGETABLE_PMD_FOLDED
43 void pmd_init(unsigned long addr, unsigned long pagetable)
44 {
45         unsigned long *p, *end;
46
47         p = (unsigned long *) addr;
48         end = p + PTRS_PER_PMD;
49
50         while (p < end) {
51                 p[0] = pagetable;
52                 p[1] = pagetable;
53                 p[2] = pagetable;
54                 p[3] = pagetable;
55                 p[4] = pagetable;
56                 p[5] = pagetable;
57                 p[6] = pagetable;
58                 p[7] = pagetable;
59                 p += 8;
60         }
61 }
62 #endif
63
64 void __init pagetable_init(void)
65 {
66         unsigned long vaddr;
67         pgd_t *pgd_base;
68
69         /* Initialize the entire pgd.  */
70         pgd_init((unsigned long)swapper_pg_dir);
71 #ifndef __PAGETABLE_PMD_FOLDED
72         pmd_init((unsigned long)invalid_pmd_table, (unsigned long)invalid_pte_table);
73 #endif
74         pgd_base = swapper_pg_dir;
75         /*
76          * Fixed mappings:
77          */
78         vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
79         fixrange_init(vaddr, vaddr + FIXADDR_SIZE, pgd_base);
80 }