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c74b2108 SK |
1 | /* |
2 | * Processor reset using WDT for TI TMS320DM644x SoC. | |
3 | * | |
4 | * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net> | |
5 | * | |
6 | * ----------------------------------------------------- | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License as | |
10 | * published by the Free Software Foundation; either version 2 of | |
11 | * the License, or (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
21 | * MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | .globl reset_cpu | |
25 | reset_cpu: | |
26 | ldr r0, WDT_TGCR | |
27 | mov r1, $0x08 | |
28 | str r1, [r0] | |
29 | ldr r1, [r0] | |
30 | orr r1, r1, $0x03 | |
31 | str r1, [r0] | |
32 | mov r1, $0 | |
33 | ldr r0, WDT_TIM12 | |
34 | str r1, [r0] | |
35 | ldr r0, WDT_TIM34 | |
36 | str r1, [r0] | |
37 | ldr r0, WDT_PRD12 | |
38 | str r1, [r0] | |
39 | ldr r0, WDT_PRD34 | |
40 | str r1, [r0] | |
41 | ldr r0, WDT_TCR | |
42 | ldr r1, [r0] | |
43 | orr r1, r1, $0x40 | |
44 | str r1, [r0] | |
45 | ldr r0, WDT_WDTCR | |
46 | ldr r1, [r0] | |
47 | orr r1, r1, $0x4000 | |
48 | str r1, [r0] | |
49 | ldr r1, WDTCR_VAL1 | |
50 | str r1, [r0] | |
51 | ldr r1, WDTCR_VAL2 | |
52 | str r1, [r0] | |
2ae0f35f TL |
53 | /* Write an invalid value to the WDKEY field to trigger |
54 | * an immediate watchdog reset */ | |
55 | mov r1, $0x4000 | |
56 | str r1, [r0] | |
c74b2108 SK |
57 | nop |
58 | nop | |
59 | nop | |
60 | nop | |
61 | reset_cpu_loop: | |
62 | b reset_cpu_loop | |
63 | ||
64 | WDT_TGCR: | |
65 | .word 0x01c21c24 | |
66 | WDT_TIM12: | |
67 | .word 0x01c21c10 | |
68 | WDT_TIM34: | |
69 | .word 0x01c21c14 | |
70 | WDT_PRD12: | |
71 | .word 0x01c21c18 | |
72 | WDT_PRD34: | |
73 | .word 0x01c21c1c | |
74 | WDT_TCR: | |
75 | .word 0x01c21c20 | |
76 | WDT_WDTCR: | |
77 | .word 0x01c21c28 | |
78 | WDTCR_VAL1: | |
79 | .word 0xa5c64000 | |
80 | WDTCR_VAL2: | |
81 | .word 0xda7e4000 |