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[u-boot] / arch / arm / mach-davinci / reset.c
1 /*
2  *  Processor reset using WDT.
3  *
4  * Copyright (C) 2012 Dmitry Bondar <bond@inmys.ru>
5  * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
6  *
7  * SPDX-License-Identifier:     GPL-2.0+
8  */
9
10 #include <common.h>
11 #include <asm/io.h>
12 #include <asm/arch/timer_defs.h>
13 #include <asm/arch/hardware.h>
14
15 void reset_cpu(unsigned long a)
16 {
17         struct davinci_timer *const wdttimer =
18                 (struct davinci_timer *)DAVINCI_WDOG_BASE;
19         writel(0x08, &wdttimer->tgcr);
20         writel(readl(&wdttimer->tgcr) | 0x03, &wdttimer->tgcr);
21         writel(0, &wdttimer->tim12);
22         writel(0, &wdttimer->tim34);
23         writel(0, &wdttimer->prd12);
24         writel(0, &wdttimer->prd34);
25         writel(readl(&wdttimer->tcr) | 0x40, &wdttimer->tcr);
26         writel(readl(&wdttimer->wdtcr) | 0x4000, &wdttimer->wdtcr);
27         writel(0xa5c64000, &wdttimer->wdtcr);
28         writel(0xda7e4000, &wdttimer->wdtcr);
29         writel(0x4000, &wdttimer->wdtcr);
30         while (1)
31                 /*nothing*/;
32 }