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