source: trunk/package/uboot-ifxmips/files/cpu/mips/danube/incaip_wdt.S @ 11601

Last change on this file since 11601 was 11601, checked in by nbd, 8 years ago

move ifxmips uboot to package/

File size: 1.8 KB
Line 
1/*
2 *  INCA-IP Watchdog timer management code.
3 *
4 *  Copyright (c) 2003  Wolfgang Denk <wd@denx.de>
5 *
6 * See file CREDITS for list of people who contributed to this
7 * project.
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
22 * MA 02111-1307 USA
23 */
24
25
26#include <config.h>
27#include <version.h>
28#include <asm/regdef.h>
29
30#ifdef CONFIG_INCA_IP
31
32#define WD_BASE            0xb8000000
33#define WD_CON0(value)     0x0020(value)
34#define WD_CON1(value)     0x0024(value)
35#define WD_DISABLE         0x00000008
36#define WD_ENABLE          0x00000000
37#define WD_WRITE_PW        0xFFFC00F8
38#define WD_WRITE_ENDINIT   0xFFFC00F3
39#define WD_WRITE_INIT      0xFFFC00F2
40
41
42        .globl  disable_incaip_wdt
43disable_incaip_wdt:
44        li      t0, WD_BASE
45
46        /* Calculate password.
47         */
48        lw      t2, WD_CON1(t0)
49        and     t2, 0xC
50
51        lw      t3, WD_CON0(t0)
52        and     t3, 0xFFFFFF01
53
54        or      t3, t2
55        or      t3, 0xF0
56
57        sw      t3, WD_CON0(t0)         /* write password */
58
59        /* Clear ENDINIT.
60         */
61        li      t1, WD_WRITE_INIT
62        sw      t1, WD_CON0(t0)
63
64
65        li      t1, WD_DISABLE
66        sw      t1, WD_CON1(t0)         /* disable watchdog */
67        li      t1, WD_WRITE_PW
68        sw      t1, WD_CON0(t0)         /* write password */
69        li      t1, WD_WRITE_ENDINIT
70        sw      t1, WD_CON0(t0)         /* end command */
71
72        j       ra
73        nop
74
75#endif /* CONFIG_INCA_IP */
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