| /* |
| * 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); |
