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