diff options
Diffstat (limited to 'os/kernel/src/chsys.c')
| -rw-r--r-- | os/kernel/src/chsys.c | 298 |
1 files changed, 0 insertions, 298 deletions
diff --git a/os/kernel/src/chsys.c b/os/kernel/src/chsys.c deleted file mode 100644 index 9212cbf5f..000000000 --- a/os/kernel/src/chsys.c +++ /dev/null @@ -1,298 +0,0 @@ -/*
- ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
- 2011,2012,2013 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 chsys.c
- * @brief System related code.
- *
- * @addtogroup system
- * @details System related APIs and services:
- * - Initialization.
- * - Locks.
- * - Interrupt Handling.
- * - Power Management.
- * - Abnormal Termination.
- * - Realtime counter.
- * .
- * @{
- */
-
-#include "ch.h"
-
-/*===========================================================================*/
-/* Module exported variables. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Module local types. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Module local variables. */
-/*===========================================================================*/
-
-/**
- * @brief System data structures.
- */
-ch_system_t ch;
-
-#if !CH_CFG_NO_IDLE_THREAD || defined(__DOXYGEN__)
-/**
- * @brief Idle thread working area.
- */
-static WORKING_AREA(_idle_thread_wa, CH_PORT_IDLE_THREAD_STACK_SIZE);
-#endif /* CH_CFG_NO_IDLE_THREAD */
-
-/*===========================================================================*/
-/* Module local functions. */
-/*===========================================================================*/
-
-#if !CH_CFG_NO_IDLE_THREAD || defined(__DOXYGEN__)
-/**
- * @brief This function implements the idle thread infinite loop.
- * @details The function puts the processor in the lowest power mode capable
- * to serve interrupts.<br>
- * The priority is internally set to the minimum system value so
- * that this thread is executed only if there are no other ready
- * threads in the system.
- *
- * @param[in] p the thread parameter, unused in this scenario
- */
-static void _idle_thread(void *p) {
-
- (void)p;
- chRegSetThreadName("idle");
- while (true) {
- port_wait_for_interrupt();
- CH_CFG_IDLE_LOOP_HOOK();
- }
-}
-#endif /* CH_CFG_NO_IDLE_THREAD */
-
-/*===========================================================================*/
-/* Module exported functions. */
-/*===========================================================================*/
-
-/**
- * @brief ChibiOS/RT initialization.
- * @details After executing this function the current instructions stream
- * becomes the main thread.
- * @pre Interrupts must be still disabled when @p chSysInit() is invoked
- * and are internally enabled.
- * @post The main thread is created with priority @p NORMALPRIO.
- * @note This function has special, architecture-dependent, requirements,
- * see the notes into the various port reference manuals.
- *
- * @special
- */
-void chSysInit(void) {
- static thread_t mainthread;
-#if CH_DBG_ENABLE_STACK_CHECK
- extern stkalign_t __main_thread_stack_base__;
-#endif
-
- port_init();
- _scheduler_init();
- _vt_init();
-#if CH_CFG_USE_TM
- _tm_init();
-#endif
-#if CH_CFG_USE_MEMCORE
- _core_init();
-#endif
-#if CH_CFG_USE_HEAP
- _heap_init();
-#endif
-#if CH_DBG_STATISTICS
- _stats_init();
-#endif
-#if CH_DBG_ENABLE_TRACE
- _trace_init();
-#endif
-
-#if !CH_CFG_NO_IDLE_THREAD
- /* Now this instructions flow becomes the main thread.*/
- setcurrp(_thread_init(&mainthread, NORMALPRIO));
-#else
- /* Now this instructions flow becomes the main thread.*/
- setcurrp(_thread_init(&mainthread, IDLEPRIO));
-#endif
-
- currp->p_state = CH_STATE_CURRENT;
-#if CH_DBG_ENABLE_STACK_CHECK
- /* This is a special case because the main thread thread_t structure is not
- adjacent to its stack area.*/
- currp->p_stklimit = &__main_thread_stack_base__;
-#endif
- chSysEnable();
-
- /* Note, &ch_debug points to the string "main" if the registry is
- active, else the parameter is ignored.*/
- chRegSetThreadName((const char *)&ch_debug);
-
-#if !CH_CFG_NO_IDLE_THREAD
- /* This thread has the lowest priority in the system, its role is just to
- serve interrupts in its context while keeping the lowest energy saving
- mode compatible with the system status.*/
- chThdCreateStatic(_idle_thread_wa, sizeof(_idle_thread_wa), IDLEPRIO,
- (tfunc_t)_idle_thread, NULL);
-#endif
-}
-
-/**
- * @brief Halts the system.
- * @details This function is invoked by the operating system when an
- * unrecoverable error is detected, for example because a programming
- * error in the application code that triggers an assertion while
- * in debug mode.
- * @note Can be invoked from any system state.
- *
- * @special
- */
-void chSysHalt(void) {
-
- port_disable();
-
-#if defined(CH_CFG_SYSTEM_HALT_HOOK) || defined(__DOXYGEN__)
- CH_CFG_SYSTEM_HALT_HOOK();
-#endif
-
- /* Harmless infinite loop.*/
- while (true)
- ;
-}
-
-/**
- * @brief Handles time ticks for round robin preemption and timer increments.
- * @details Decrements the remaining time quantum of the running thread
- * and preempts it when the quantum is used up. Increments system
- * time and manages the timers.
- * @note The frequency of the timer determines the system tick granularity
- * and, together with the @p CH_CFG_TIME_QUANTUM macro, the round robin
- * interval.
- *
- * @iclass
- */
-void chSysTimerHandlerI(void) {
-
- chDbgCheckClassI();
-
-#if CH_CFG_TIME_QUANTUM > 0
- /* Running thread has not used up quantum yet? */
- if (currp->p_preempt > 0)
- /* Decrement remaining quantum.*/
- currp->p_preempt--;
-#endif
-#if CH_DBG_THREADS_PROFILING
- currp->p_time++;
-#endif
- chVTDoTickI();
-#if defined(CH_CFG_SYSTEM_TICK_HOOK)
- CH_CFG_SYSTEM_TICK_HOOK();
-#endif
-}
-
-
-/**
- * @brief Returns the execution context and enters the kernel lock mode.
- * @details This functions enters into a critical zone and can be called
- * from any context. Because its flexibility it is less efficient
- * than @p chSysLock() which is preferable when the calling context
- * is known.
- *
- * @return The previous system status, the encoding of this
- * status word is architecture-dependent and opaque.
- *
- * @xclass
- */
-syssts_t chSysGetAndLockX(void) {
-
- syssts_t sts = port_get_irq_status();
- if (port_irq_enabled(sts)) {
- if (port_is_isr_context())
- chSysLockFromISR();
- else
- chSysLock();
- }
- return sts;
-}
-
-/**
- * @brief Restores the specified execution status.
- *
- * @param[in] sts the system status to be restored.
- *
- * @xclass
- */
-void chSysRestoreLockX(syssts_t sts) {
-
- if (port_irq_enabled(sts)) {
- if (port_is_isr_context())
- chSysUnlockFromISR();
- else
- chSysUnlock();
- }
-}
-
-#if CH_PORT_SUPPORTS_RT || defined(__DOXYGEN__)
-/**
- * @brief Realtime window test.
- * @details This function verifies if the current realtime counter value
- * lies within the specified range or not. The test takes care
- * of the realtime counter wrapping to zero on overflow.
- * @note When start==end then the function returns always true because the
- * whole time range is specified.
- * @note This function is only available if the port layer supports the
- * option @p CH_PORT_SUPPORTS_RT.
- *
- * @param[in] cnt the counter value to be tested
- * @param[in] start the start of the time window (inclusive)
- * @param[in] end the end of the time window (non inclusive)
- * @retval true current time within the specified time window.
- * @retval false current time not within the specified time window.
- *
- * @xclass
- */
-bool chSysIsCounterWithinX(rtcnt_t cnt, rtcnt_t start, rtcnt_t end) {
-
- return end > start ? (cnt >= start) && (cnt < end) :
- (cnt >= start) || (cnt < end);
-}
-
-/**
- * @brief Polled delay.
- * @note The real delay is always few cycles in excess of the specified
- * value.
- * @note This function is only available if the port layer supports the
- * option @p CH_PORT_SUPPORTS_RT.
- *
- * @param[in] cycles number of cycles
- *
- * @xclass
- */
-void chSysPolledDelayX(rtcnt_t cycles) {
- rtcnt_t start = chSysGetRealtimeCounterX();
- rtcnt_t end = start + cycles;
- while (chSysIsCounterWithinX(chSysGetRealtimeCounterX(), start, end))
- ;
-}
-#endif /* CH_PORT_SUPPORTS_RT */
-
-/** @} */
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