lpc32xx/start/bspreset.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSBSPsARMLPC32XX
0007  *
0008  * @brief Reset code.
0009  */
0010
0011 /*
0012  * Copyright (C) 2009, 2010 embedded brains GmbH & Co. KG
0013  *
0014  * Redistribution and use in source and binary forms, with or without
0015  * modification, are permitted provided that the following conditions
0016  * are met:
0017  * 1. Redistributions of source code must retain the above copyright
0018  *    notice, this list of conditions and the following disclaimer.
0019  * 2. Redistributions in binary form must reproduce the above copyright
0020  *    notice, this list of conditions and the following disclaimer in the
0021  *    documentation and/or other materials provided with the distribution.
0022  *
0023  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0024  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0025  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0026  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0027  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0028  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0029  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0030  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0031  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0032  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0033  * POSSIBILITY OF SUCH DAMAGE.
0034  */
0035
0036 #include <bspopts.h>
0037 #include <bsp/bootcard.h>
0038 #include <bsp/lpc32xx.h>
0039
0040 static void watchdog_reset(void)
0041 {
0042   #ifdef LPC32XX_ENABLE_WATCHDOG_RESET
0043     LPC32XX_TIMCLK_CTRL |= TIMCLK_CTRL_WDT;
0044     lpc32xx.wdt.mctrl |= WDTTIM_MCTRL_M_RES1 | WDTTIM_MCTRL_M_RES2;
0045     lpc32xx.wdt.emr = WDTTIM_EMR_MATCH_CTRL_SET(lpc32xx.wdt.emr, 0x2);
0046     lpc32xx.wdt.ctrl |= WDTTIM_CTRL_COUNT_ENAB;
0047     lpc32xx.wdt.match0 = 1;
0048     lpc32xx.wdt.counter = 0;
0049   #endif
0050 }
0051
0052 void bsp_reset( rtems_fatal_source source, rtems_fatal_code code )
0053 {
0054   (void) source;
0055   (void) code;
0056
0057   watchdog_reset();
0058
0059   while (true) {
0060     /* Do nothing */
0061   }
0062 }