73 lines
1.7 KiB
ArmAsm
73 lines
1.7 KiB
ArmAsm
|
/*
|
||
|
|
* 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
|