blob: 346e21714fd9a1bd199c7c1cbfd078427b1aacec [file] [log] [blame]
Nobuhiro Iwamatsu0b135cf2007-05-13 20:58:00 +09001/*
2 * This program is free software; you can redistribute it and/or
3 * modify it under the terms of the GNU General Public License as
4 * published by the Free Software Foundation; either version 2 of
5 * the License, or (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
15 * MA 02111-1307 USA
16 */
17
18#include <common.h>
19#include <asm/processor.h>
20
21#define WDT_BASE WTCNT
22
23static unsigned char cnt_read (void){
24 return *((volatile unsigned char *)(WDT_BASE + 0x00));
25}
26
27static unsigned char csr_read (void){
28 return *((volatile unsigned char *)(WDT_BASE + 0x04));
29}
30
31static void cnt_write (unsigned char value){
32 while (csr_read() & (1 << 5)) {
33 /* delay */
34 }
Wolfgang Denk61fb15c52007-12-27 01:52:50 +010035 *((volatile unsigned short *)(WDT_BASE + 0x00))
Nobuhiro Iwamatsub02bad12007-09-23 02:12:30 +090036 = ((unsigned short) value) | 0x5A00;
Nobuhiro Iwamatsu0b135cf2007-05-13 20:58:00 +090037}
38
39static void csr_write (unsigned char value){
Wolfgang Denk61fb15c52007-12-27 01:52:50 +010040 *((volatile unsigned short *)(WDT_BASE + 0x04))
Nobuhiro Iwamatsub02bad12007-09-23 02:12:30 +090041 = ((unsigned short) value) | 0xA500;
Nobuhiro Iwamatsu0b135cf2007-05-13 20:58:00 +090042}
43
44
45int watchdog_init (void){ return 0; }
46
47void reset_cpu (unsigned long ignored)
48{
49 while(1);
50}