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original_kernel/arch/m68k/platform/coldfire/reset.c

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m68knommu: factor some common ColdFire cpu reset code A number of the early ColdFire cores use the same code to reset the CPU. Currently that is duplicated in each of the sub-arch files. Pull out this common code and use a single copy of it for all CPU types that use it. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2012-02-19 14:16:58 +08:00
/*
* 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>
m68knommu: factor more common ColdFire cpu reset code Most of the more modern ColdFire cores use the same code to reset the CPU (but it is different to most of the earlier cores). Currently that is duplicated in each of the sub-arch files. Pull out this common code and out a single copy of it with the other common reset code. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2012-02-19 14:47:24 +08:00
/*
* 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)
m68knommu: factor some common ColdFire cpu reset code A number of the early ColdFire cores use the same code to reset the CPU. Currently that is duplicated in each of the sub-arch files. Pull out this common code and use a single copy of it for all CPU types that use it. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2012-02-19 14:16:58 +08:00
{
local_irq_disable();
/* Set watchdog to soft reset, and enabled */
m68knommu: make ColdFire SYPCR and RSR register definitions absolute addresses 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>
2012-07-15 19:55:01 +08:00
__raw_writeb(0xc0, MCFSIM_SYPCR);
m68knommu: factor some common ColdFire cpu reset code A number of the early ColdFire cores use the same code to reset the CPU. Currently that is duplicated in each of the sub-arch files. Pull out this common code and use a single copy of it for all CPU types that use it. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2012-02-19 14:16:58 +08:00
for (;;)
/* wait for watchdog to timeout */;
}
m68knommu: factor more common ColdFire cpu reset code Most of the more modern ColdFire cores use the same code to reset the CPU (but it is different to most of the earlier cores). Currently that is duplicated in each of the sub-arch files. Pull out this common code and out a single copy of it with the other common reset code. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2012-02-19 14:47:24 +08:00
#endif
#ifdef MCF_RCR
static void mcf_cpu_reset(void)
{
local_irq_disable();
__raw_writeb(MCF_RCR_SWRESET, MCF_RCR);
}
#endif
m68knommu: factor some common ColdFire cpu reset code A number of the early ColdFire cores use the same code to reset the CPU. Currently that is duplicated in each of the sub-arch files. Pull out this common code and use a single copy of it for all CPU types that use it. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2012-02-19 14:16:58 +08:00
static int __init mcf_setup_reset(void)
{
mach_reset = mcf_cpu_reset;
return 0;
}
arch_initcall(mcf_setup_reset);