e1e362dc07
Make all definitions of the ColdFire Reset and System registers absolute addresses. Currently some are relative to the MBAR peripheral region. The various ColdFire parts use different methods to address the internal registers, some are absolute, some are relative to peripheral regions which can be mapped at different address ranges (such as the MBAR and IPSBAR registers). We don't want to deal with this in the code when we are accessing these registers, so make all register definitions the abolsute address - factoring out whether it is an offset into a peripheral region. This makes them all consistently defined, and reduces the occasional bugs caused by inconsistent definition of the register addresses. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
/*
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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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