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/*
* reset.c -- common ColdFire SoC reset support
*
* (C) Copyright 2012, Greg Ungerer <gerg@uclinux.org>
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive
* for more details.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <asm/machdep.h>
#include <asm/coldfire.h>
#include <asm/mcfsim.h>
/*
* There are 2 common methods amongst the ColdFure parts for reseting
* the CPU. But there are couple of exceptions, the 5272 and the 547x
* have something completely special to them, and we let their specific
* subarch code handle them.
*/
#ifdef MCFSIM_SYPCR
static void mcf_cpu_reset(void)
{
local_irq_disable();
/* Set watchdog to soft reset, and enabled */
__raw_writeb(0xc0, MCF_MBAR + MCFSIM_SYPCR);
for (;;)
/* wait for watchdog to timeout */;
}
#endif
#ifdef MCF_RCR
static void mcf_cpu_reset(void)
{
local_irq_disable();
__raw_writeb(MCF_RCR_SWRESET, MCF_RCR);
}
#endif
static int __init mcf_setup_reset(void)
{
mach_reset = mcf_cpu_reset;
return 0;
}
arch_initcall(mcf_setup_reset);
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