path: root/c/src/lib/libbsp/arm/lpc24xx/startup/bspreset.c

/**
 * @file
 *
 * @ingroup lpc24xx
 *
 * @brief Reset code.
 */

/*
 * Copyright (c) 2008-2013 embedded brains GmbH.  All rights reserved.
 *
 *  embedded brains GmbH
 *  Obere Lagerstr. 30
 *  82178 Puchheim
 *  Germany
 *  <rtems@embedded-brains.de>
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rtems.org/license/LICENSE.
 */

#include <rtems.h>
#include <rtems/score/armv7m.h>

#include <bsp/bootcard.h>
#include <bsp/lpc24xx.h>
#include <bsp/start.h>

BSP_START_TEXT_SECTION __attribute__((flatten)) void bsp_reset(void)
{
  rtems_interrupt_level level;

  (void) level;
  rtems_interrupt_disable(level);

  #if defined(ARM_MULTILIB_ARCH_V4)
    /* Trigger watchdog reset */
    WDCLKSEL = 0;
    WDTC = 0xff;
    WDMOD = 0x3;
    WDFEED = 0xaa;
    WDFEED = 0x55;
  #elif defined(ARM_MULTILIB_ARCH_V7M)
    _ARMV7M_SCB->aircr = ARMV7M_SCB_AIRCR_VECTKEY
      | ARMV7M_SCB_AIRCR_SYSRESETREQ;
  #endif

  while (true) {
    /* Do nothing */
  }
}