/*
    ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.

    This file is part of ChibiOS/RT.

    ChibiOS/RT is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    ChibiOS/RT is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/**
 * @file templates/chcore.c
 * @brief Port related template code.
 * @addtogroup core
 * @{
 */

#include <ch.h>

/*
 * This file is a template of the system driver functions provided by a port.
 * Some of the following functions may be implemented as macros in chcore.h if
 * the implementer decides that there is an advantage in doing so, as example
 * because performance concerns.
 */

/**
 * @brief Port-related initialization code.
 *
 * @note This function is usually empty.
 */
void port_init(void){
}

/**
 * @brief Kernel-unlock action.
 * @details Usually this function just disables interrupts but may perform more
 * actions.
 */
void port_lock(void) {
}

/**
 * @brief Kernel-unlock action.
 * @details Usually this function just disables interrupts but may perform more
 * actions.
 */
void port_unlock(void) {
}

/**
 * @brief Kernel-lock action from an interrupt handler.
 * @details This function is invoked before invoking I-class APIs from
 * interrupt handlers. The implementation is architecture dependent, in its
 * simplest form it is void.
 */
void port_lock_from_isr(void) {
}

/**
 * @brief Kernel-unlock action from an interrupt handler.
 * @details This function is invoked after invoking I-class APIs from interrupt
 * handlers. The implementation is architecture dependent, in its simplest form
 * it is void.
 */
void port_unlock_from_isr(void) {
}

/**
 * @brief Disables all the interrupt sources.
 *
 * @note Of course non maskable interrupt sources are not included.
 */
void port_disable() {
}

/**
 * @brief Disables the interrupt sources that are not supposed to preempt the kernel.
 */
void port_suspend(void) {
}

/**
 * @brief Enables all the interrupt sources.
 */
void port_enable(void) {
}

/**
 * @brief Enters an architecture-dependent halt mode.
 * @details The function is meant to return when an interrupt becomes pending.
 * The simplest implementation is an empty function but this will not take
 * advantage of architecture-specific power saving modes.
 */
void port_wait_for_interrupt(void) {
}

/**
 * @brief Halts the system.
 * @details This function is invoked by the operating system when an
 * unrecoverable error is detected (as example because a programming error in
 * the application code that triggers an assertion while in debug mode).
 */
void port_halt(void) {

  port_disable();
  while (TRUE) {
  }
}

/**
 * @brief Performs a context switch between two threads.
 * @details This is the most critical code in any port, this function
 * is responsible for the context switch between 2 threads.
 *
 * @param otp the thread to be switched out
 * @param ntp the thread to be switched in
 * @note The implementation of this code affects <b>directly</b> the context
 *       switch performance so optimize here as much as you can.
 */
void port_switch(Thread *otp, Thread *ntp) {
}

/** @} */