counter.h

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/* SPDX-License-Identifier: BSD-2-Clause */
 
/*
 * Copyright (C) 2014, 2018 embedded brains GmbH & Co. KG
 *
 * 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.
 *
 * 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 OWNER 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.
 */
 
#ifndef _RTEMS_SAPI_COUNTER_H
#define _RTEMS_SAPI_COUNTER_H
 
#include <rtems/score/cpu.h>
 
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
 
typedef CPU_Counter_ticks rtems_counter_ticks;
 
static inline uint32_t rtems_counter_frequency( void )
{
  return _CPU_Counter_frequency();
}
 
static inline rtems_counter_ticks rtems_counter_read( void )
{
  return _CPU_Counter_read();
}
 
static inline rtems_counter_ticks rtems_counter_difference(
  rtems_counter_ticks second,
  rtems_counter_ticks first
)
{
  return second - first;
}
 
uint64_t rtems_counter_ticks_to_nanoseconds(
  rtems_counter_ticks ticks
);
 
rtems_counter_ticks rtems_counter_nanoseconds_to_ticks(
  uint32_t nanoseconds
);
 
int64_t rtems_counter_ticks_to_sbintime( rtems_counter_ticks ticks );
 
rtems_counter_ticks rtems_counter_sbintime_to_ticks( int64_t sbt );
 
void rtems_counter_initialize_converter( uint32_t frequency );
 
void rtems_counter_delay_ticks( rtems_counter_ticks ticks );
 
void rtems_counter_delay_nanoseconds( uint32_t nanoseconds );
 
#ifdef __cplusplus
}
#endif /* __cplusplus */
 
#endif /* _RTEMS_SAPI_COUNTER_H */