/* * 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 */ mcf_write8(0xc0, MCFSIM_SYPCR); for (;;) /* wait for watchdog to timeout */; } #endif #ifdef MCF_RCR static void mcf_cpu_reset(void) { local_irq_disable(); mcf_write8(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);