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authorChen Liqin <liqin.chen@sunplusct.com>2009-06-12 10:01:00 -0400
committerArnd Bergmann <arnd@arndb.de>2009-06-19 05:38:47 -0400
commit6bc9a3966f0395419b09b2ec90f89f7f00341b37 (patch)
tree9c0d9d5376020266f5602501c8376d4a4f13142d /arch/score/mm/pgtable.c
parent0732f87761dbe417cb6e084b712d07e879e876ef (diff)
score: Add support for Sunplus S+core architecture
This is the complete set of new arch Score's files for linux. Score instruction set support 16bits, 32bits and 64bits instruction, Score SOC had been used in game machine and LCD TV. Signed-off-by: Chen Liqin <liqin.chen@sunplusct.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/score/mm/pgtable.c')
-rw-r--r--arch/score/mm/pgtable.c60
1 files changed, 60 insertions, 0 deletions
diff --git a/arch/score/mm/pgtable.c b/arch/score/mm/pgtable.c
new file mode 100644
index 00000000000..10b0962f83d
--- /dev/null
+++ b/arch/score/mm/pgtable.c
@@ -0,0 +1,60 @@
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
31void 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
48void __init pagetable_init(void)
49{
50 unsigned long vaddr;
51 pgd_t *pgd_base;
52
53 /* Initialize the entire pgd. */
54 pgd_init((unsigned long) swapper_pg_dir);
55 pgd_init((unsigned long) swapper_pg_dir
56 + sizeof(pgd_t) * USER_PTRS_PER_PGD);
57
58 pgd_base = swapper_pg_dir;
59 vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
60}