/* * INCA-IP Watchdog timer management code. * * Copyright (c) 2003 Wolfgang Denk <wd@denx.de> * * See file CREDITS for list of people who contributed to this * project. * * 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 <config.h> #include <version.h> #include <asm/regdef.h> #define WD_BASE 0xb8000000 #define WD_CON0(value) 0x0020(value) #define WD_CON1(value) 0x0024(value) #define WD_DISABLE 0x00000008 #define WD_ENABLE 0x00000000 #define WD_WRITE_PW 0xFFFC00F8 #define WD_WRITE_ENDINIT 0xFFFC00F3 #define WD_WRITE_INIT 0xFFFC00F2 .globl disable_incaip_wdt disable_incaip_wdt: li t0, WD_BASE /* Calculate password. */ lw t2, WD_CON1(t0) and t2, 0xC lw t3, WD_CON0(t0) and t3, 0xFFFFFF01 or t3, t2 or t3, 0xF0 sw t3, WD_CON0(t0) /* write password */ /* Clear ENDINIT. */ li t1, WD_WRITE_INIT sw t1, WD_CON0(t0) li t1, WD_DISABLE sw t1, WD_CON1(t0) /* disable watchdog */ li t1, WD_WRITE_PW sw t1, WD_CON0(t0) /* write password */ li t1, WD_WRITE_ENDINIT sw t1, WD_CON0(t0) /* end command */ j ra nop