/* * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #include <common.h> #include <asm/processor.h> #include <asm/system.h> #include <asm/io.h> #define WDT_BASE WTCNT #define WDT_WD (1 << 6) #define WDT_RST_P (0) #define WDT_RST_M (1 << 5) #define WDT_ENABLE (1 << 7) #if defined(CONFIG_WATCHDOG) static unsigned char csr_read(void) { return inb(WDT_BASE + 0x04); } static void cnt_write(unsigned char value) { outl((unsigned short)value | 0x5A00, WDT_BASE + 0x00); } static void csr_write(unsigned char value) { outl((unsigned short)value | 0xA500, WDT_BASE + 0x04); } void watchdog_reset(void) { outl(0x55000000, WDT_BASE + 0x08); } int watchdog_init(void) { /* Set overflow time*/ cnt_write(0); /* Power on reset */ csr_write(WDT_WD|WDT_RST_P|WDT_ENABLE); return 0; } int watchdog_disable(void) { csr_write(csr_read() & ~WDT_ENABLE); return 0; } #endif void reset_cpu(unsigned long ignored) { /* Address error with SR.BL=1 first. */ trigger_address_error(); while (1) ; }