pinebuds/rtos/rtx5/rtx_system.c

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/*
* Copyright (c) 2013-2019 Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the License); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* -----------------------------------------------------------------------------
*
* Project: CMSIS-RTOS RTX
* Title: System functions
*
* -----------------------------------------------------------------------------
*/
#include "rtx_lib.h"
// ==== Helper functions ====
/// Put Object into ISR Queue.
/// \param[in] object object.
/// \return 1 - success, 0 - failure.
static uint32_t isr_queue_put(os_object_t *object) {
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#if (EXCLUSIVE_ACCESS == 0)
uint32_t primask = __get_PRIMASK();
#else
uint32_t n;
#endif
uint16_t max;
uint32_t ret;
max = osRtxInfo.isr_queue.max;
#if (EXCLUSIVE_ACCESS == 0)
__disable_irq();
if (osRtxInfo.isr_queue.cnt < max) {
osRtxInfo.isr_queue.cnt++;
osRtxInfo.isr_queue.data[osRtxInfo.isr_queue.in] = object;
if (++osRtxInfo.isr_queue.in == max) {
osRtxInfo.isr_queue.in = 0U;
}
ret = 1U;
} else {
ret = 0U;
}
if (primask == 0U) {
__enable_irq();
}
#else
if (atomic_inc16_lt(&osRtxInfo.isr_queue.cnt, max) < max) {
n = atomic_inc16_lim(&osRtxInfo.isr_queue.in, max);
osRtxInfo.isr_queue.data[n] = object;
ret = 1U;
} else {
ret = 0U;
}
#endif
return ret;
}
/// Get Object from ISR Queue.
/// \return object or NULL.
static os_object_t *isr_queue_get(void) {
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#if (EXCLUSIVE_ACCESS != 0)
uint32_t n;
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#endif
uint16_t max;
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os_object_t *ret;
max = osRtxInfo.isr_queue.max;
#if (EXCLUSIVE_ACCESS == 0)
__disable_irq();
if (osRtxInfo.isr_queue.cnt != 0U) {
osRtxInfo.isr_queue.cnt--;
ret = osRtxObject(osRtxInfo.isr_queue.data[osRtxInfo.isr_queue.out]);
if (++osRtxInfo.isr_queue.out == max) {
osRtxInfo.isr_queue.out = 0U;
}
} else {
ret = NULL;
}
__enable_irq();
#else
if (atomic_dec16_nz(&osRtxInfo.isr_queue.cnt) != 0U) {
n = atomic_inc16_lim(&osRtxInfo.isr_queue.out, max);
ret = osRtxObject(osRtxInfo.isr_queue.data[n]);
} else {
ret = NULL;
}
#endif
return ret;
}
// ==== Library Functions ====
/// Tick Handler.
// lint -esym(714,osRtxTick_Handler) "Referenced by Exception handlers"
// lint -esym(759,osRtxTick_Handler) "Prototype in header"
// lint -esym(765,osRtxTick_Handler) "Global scope"
void osRtxTick_Handler(void) {
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os_thread_t *thread;
OS_Tick_AcknowledgeIRQ();
osRtxInfo.kernel.tick++;
#if __RTX_CPU_STATISTICS__
osRtxInfo.thread.run.curr->rtime += 1;
#endif
// Process Timers
if (osRtxInfo.timer.tick != NULL) {
osRtxInfo.timer.tick();
}
// Process Thread Delays
osRtxThreadDelayTick();
osRtxThreadDispatch(NULL);
// Check Round Robin timeout
if (osRtxInfo.thread.robin.timeout != 0U) {
if (osRtxInfo.thread.robin.thread != osRtxInfo.thread.run.next) {
// Reset Round Robin
osRtxInfo.thread.robin.thread = osRtxInfo.thread.run.next;
osRtxInfo.thread.robin.tick = osRtxInfo.thread.robin.timeout;
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} else {
if (osRtxInfo.thread.robin.tick != 0U) {
osRtxInfo.thread.robin.tick--;
}
if (osRtxInfo.thread.robin.tick == 0U) {
// Round Robin Timeout
if (osRtxKernelGetState() == osRtxKernelRunning) {
thread = osRtxInfo.thread.ready.thread_list;
if ((thread != NULL) &&
(thread->priority == osRtxInfo.thread.robin.thread->priority)) {
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osRtxThreadListRemove(thread);
osRtxThreadReadyPut(osRtxInfo.thread.robin.thread);
EvrRtxThreadPreempted(osRtxInfo.thread.robin.thread);
osRtxThreadSwitch(thread);
osRtxInfo.thread.robin.thread = thread;
osRtxInfo.thread.robin.tick = osRtxInfo.thread.robin.timeout;
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}
}
}
}
}
}
/// Pending Service Call Handler.
// lint -esym(714,osRtxPendSV_Handler) "Referenced by Exception handlers"
// lint -esym(759,osRtxPendSV_Handler) "Prototype in header"
// lint -esym(765,osRtxPendSV_Handler) "Global scope"
void osRtxPendSV_Handler(void) {
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os_object_t *object;
for (;;) {
object = isr_queue_get();
if (object == NULL) {
break;
}
switch (object->id) {
case osRtxIdThread:
osRtxInfo.post_process.thread(osRtxThreadObject(object));
break;
case osRtxIdEventFlags:
osRtxInfo.post_process.event_flags(osRtxEventFlagsObject(object));
break;
case osRtxIdSemaphore:
osRtxInfo.post_process.semaphore(osRtxSemaphoreObject(object));
break;
case osRtxIdMemoryPool:
osRtxInfo.post_process.memory_pool(osRtxMemoryPoolObject(object));
break;
case osRtxIdMessage:
osRtxInfo.post_process.message(osRtxMessageObject(object));
break;
default:
// Should never come here
break;
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}
}
osRtxThreadDispatch(NULL);
}
/// Register post ISR processing.
/// \param[in] object generic object.
void osRtxPostProcess(os_object_t *object) {
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if (isr_queue_put(object) != 0U) {
if (osRtxInfo.kernel.blocked == 0U) {
SetPendSV();
} else {
osRtxInfo.kernel.pendSV = 1U;
}
} else {
(void)osRtxErrorNotify(osRtxErrorISRQueueOverflow, object);
}
}