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.
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.
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,
19 #include <asm/processor.h>
22 #define WDT_BASE WTCNT
24 #define WDT_WD (1 << 6)
26 #define WDT_RST_M (1 << 5)
27 #define WDT_ENABLE (1 << 7)
29 #if defined(CONFIG_WATCHDOG)
30 static unsigned char csr_read(void)
32 return inb(WDT_BASE + 0x04);
35 static void cnt_write(unsigned char value)
37 outl((unsigned short)value | 0x5A00, WDT_BASE + 0x00);
40 static void csr_write(unsigned char value)
42 outl((unsigned short)value | 0xA500, WDT_BASE + 0x04);
45 void watchdog_reset(void)
47 outl(0x55000000, WDT_BASE + 0x08);
50 int watchdog_init(void)
52 /* Set overflow time*/
55 csr_write(WDT_WD|WDT_RST_P|WDT_ENABLE);
60 int watchdog_disable(void)
62 csr_write(csr_read() & ~WDT_ENABLE);
67 void reset_cpu(unsigned long ignored)