lpm.h

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/*
 * Copyright (C) 2020 Yago Fontoura do Rosario <yago.rosario@hotmail.com.br>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holder nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */
/**
 * \addtogroup nrf-platforms
 * @{
 *
 * \file
 *  Configuration for the nrf platform
 */
#ifndef LPM_H
#define LPM_H
 
#include "contiki.h"
 
#include "energest.h"
#include "critical.h"
#include "process.h"
 
/*---------------------------------------------------------------------------*/
/**
 * @brief Stop and wait for an interrupt
 */
#if defined(NRF54L15_XXAA)
extern void clock_arch_check_and_recover(void);
#else
#define clock_arch_check_and_recover() do { } while(0)
#endif
 
static inline void
lpm_drop(void)
{
  int_master_status_t status;
  int abort;
  status = critical_enter();
  abort = process_nevents();
  if(!abort) {
    ENERGEST_SWITCH(ENERGEST_TYPE_CPU, ENERGEST_TYPE_LPM);
#if defined(NRF54L15_XXAA)
    /* After soft-reset on nRF54L15, GRTC interrupts may not wake the CPU
     * from WFI. Spin instead until that is resolved. */
    for(volatile int _i = 0; _i < 1000; _i++) { __NOP(); }
#else
    __WFI();
#endif
    ENERGEST_SWITCH(ENERGEST_TYPE_LPM, ENERGEST_TYPE_CPU);
  }
  critical_exit(status);
  clock_arch_check_and_recover();
}
/*---------------------------------------------------------------------------*/
#endif /* LPM_H */
 
/** @} */