nuttx/sched/init/init.h

/****************************************************************************
 * sched/init/init.h
 *
 *   Copyright (C) 2007-2014, 2016 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <gnutt@nuttx.org>
 *
 * 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 NuttX 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 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 __SCHED_INIT_INIT_H
#define __SCHED_INIT_INIT_H

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>

/****************************************************************************
 * Public Function Prototypes
 ****************************************************************************/

/****************************************************************************
 * Name: os_start
 *
 * Description:
 *   This function is called to initialize the operating system and to spawn
 *   the user initialization thread of execution.  This is the initial entry
 *   point into NuttX
 *
 * Input Parameters:
 *   None
 *
 * Returned value:
 *   Does not return.
 *
 ****************************************************************************/

void os_start(void);

/****************************************************************************
 * Name: os_smpstart
 *
 * Description:
 *   In an SMP configution, only one CPU is initially active (CPU 0). System
 *   initialization occurs on that single thread. At the completion of the
 *   initialization of the OS, just before beginning normal multitasking,
 *   the additional CPUs would be started by calling this function.
 *
 * Input Parameters:
 *   None
 *
 * Returned Value:
 *   Zero on success; a negater errno value on failure.
 *
 ****************************************************************************/

#ifdef CONFIG_SMP
int os_smpstart(void);
#endif

/****************************************************************************
 * Name: os_idletask
 *
 * Description:
 *   This is the common IDLE task for CPUs 1 through (CONFIG_SMP_NCPUS-1).
 *   It is equivalent to the CPU 0 IDLE logic in os_start.c
 *
 * Input Parameters:
 *   Standard task arguments.
 *
 * Returned Value:
 *   This function does not return.
 *
 ****************************************************************************/

#ifdef CONFIG_SMP
int os_idletask(int argc, FAR char *argv[]);
#endif

/****************************************************************************
 * Name: os_bringup
 *
 * Description:
 *   Start all initial system tasks.  This does the "system bring-up" after
 *   the conclusion of basic OS initialization.  These initial system tasks
 *   may include:
 *
 *   - pg_worker:   The page-fault worker thread (only if CONFIG_PAGING is
 *                  defined.
 *   - work_thread: The work thread.  This general thread can be used to
 *                  perform most any kind of queued work.  Its primary
 *                  function is to serve as the "bottom half" of device
 *                  drivers.
 *
 *   And the main application entry point:
 *   symbols:
 *
 *   - USER_ENTRYPOINT: This is the default user application entry point.
 *
 * Input Parameters:
 *   None
 *
 * Returned Value:
 *   None
 *
 ****************************************************************************/

int os_bringup(void);

#endif /* __SCHED_INIT_INIT_H */