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50 lines
1.1 KiB
50 lines
1.1 KiB
/* |
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* reset.c -- common ColdFire SoC reset support |
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* |
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* (C) Copyright 2012, Greg Ungerer <[email protected]> |
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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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