46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
/*
|
|
* Copyright (c) 2008 Carsten Schlote <c.schlote@konzeptpark.de>
|
|
* See file CREDITS for list of people who contributed to this project.
|
|
*
|
|
* This file is part of barebox.
|
|
*
|
|
* barebox is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* barebox is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with barebox. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/** @file
|
|
* Implements a watchdog triggered reset for V4e Coldfire cores
|
|
*/
|
|
#include <common.h>
|
|
#include <mach/mcf54xx-regs.h>
|
|
|
|
/**
|
|
* Reset the cpu by setting up the watchdog timer and let it time out
|
|
*/
|
|
void __noreturn reset_cpu (unsigned long ignored)
|
|
{
|
|
while ( ignored ) { ; };
|
|
|
|
/* Disable watchdog and set Time-Out field to minimum timeout value */
|
|
MCF_GPT_GMS0 = 0;
|
|
MCF_GPT_GCIR0 = MCF_GPT_GCIR_PRE(1) | MCF_GPT_GCIR_CNT(0xffff);
|
|
|
|
/* Enable watchdog */
|
|
MCF_GPT_GMS0 = MCF_GPT_GMS_OCPW(0xA5) | MCF_GPT_GMS_WDEN | MCF_GPT_GMS_CE | MCF_GPT_GMS_TMS_GPIO;
|
|
|
|
while (1);
|
|
/*NOTREACHED*/
|
|
}
|
|
EXPORT_SYMBOL(reset_cpu);
|
|
|