| /* | |
| * 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 |