xref: /openbmc/u-boot/arch/arm/mach-bcm283x/reset.c (revision 83bf0057) 
1 /*
2  * (C) Copyright 2012 Stephen Warren
3  *
4  * See file CREDITS for list of people who contributed to this
5  * project.
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License
9  * version 2 as published by the Free Software Foundation.
10  *
11  * This program is distributed in the hope that it will be useful, but
12  * WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  */
16 
17 #include <common.h>
18 #include <asm/io.h>
19 #include <asm/arch/wdog.h>
20 
21 #define RESET_TIMEOUT 10
22 
23 void reset_cpu(ulong addr)
24 {
25 	struct bcm2835_wdog_regs *regs =
26 		(struct bcm2835_wdog_regs *)BCM2835_WDOG_PHYSADDR;
27 	uint32_t rstc;
28 
29 	rstc = readl(&regs->rstc);
30 	rstc &= ~BCM2835_WDOG_RSTC_WRCFG_MASK;
31 	rstc |= BCM2835_WDOG_RSTC_WRCFG_FULL_RESET;
32 
33 	writel(BCM2835_WDOG_PASSWORD | RESET_TIMEOUT, &regs->wdog);
34 	writel(BCM2835_WDOG_PASSWORD | rstc, &regs->rstc);
35 }
36