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
6 * Copyright (C) 1999, 2000 by Silicon Graphics
7 * Copyright (C) 2003 by Ralf Baechle
9 #include <linux/init.h>
11 #include <asm/pgtable.h>
12 #include <asm/pgalloc.h>
14 void pgd_init(unsigned long page
)
16 unsigned long *p
, *end
;
18 p
= (unsigned long *) page
;
19 end
= p
+ PTRS_PER_PGD
;
22 p
[0] = (unsigned long) invalid_pmd_table
;
23 p
[1] = (unsigned long) invalid_pmd_table
;
24 p
[2] = (unsigned long) invalid_pmd_table
;
25 p
[3] = (unsigned long) invalid_pmd_table
;
26 p
[4] = (unsigned long) invalid_pmd_table
;
27 p
[5] = (unsigned long) invalid_pmd_table
;
28 p
[6] = (unsigned long) invalid_pmd_table
;
29 p
[7] = (unsigned long) invalid_pmd_table
;
34 void pmd_init(unsigned long addr
, unsigned long pagetable
)
36 unsigned long *p
, *end
;
38 p
= (unsigned long *) addr
;
39 end
= p
+ PTRS_PER_PMD
;
42 p
[0] = (unsigned long)pagetable
;
43 p
[1] = (unsigned long)pagetable
;
44 p
[2] = (unsigned long)pagetable
;
45 p
[3] = (unsigned long)pagetable
;
46 p
[4] = (unsigned long)pagetable
;
47 p
[5] = (unsigned long)pagetable
;
48 p
[6] = (unsigned long)pagetable
;
49 p
[7] = (unsigned long)pagetable
;
54 void __init
pagetable_init(void)
60 /* Initialize the entire pgd. */
61 pgd_init((unsigned long)swapper_pg_dir
);
62 pmd_init((unsigned long)invalid_pmd_table
, (unsigned long)invalid_pte_table
);
63 memset((void *)invalid_pte_table
, 0, sizeof(pte_t
) * PTRS_PER_PTE
);
65 memset((void *)kptbl
, 0, PAGE_SIZE
<< PGD_ORDER
);
66 memset((void *)kpmdtbl
, 0, PAGE_SIZE
);
67 set_pgd(swapper_pg_dir
, __pgd(kpmdtbl
));
70 * The 64-bit kernel uses a flat pagetable for it's kernel mappings ...
75 while (i
< (1 << PGD_ORDER
)) {
76 pmd_val(*pmd
) = (unsigned long)pte
;