Rahul Dahiya / Mbed OS STM32F7 Ethernet

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mbed-os/drivers/InterruptManager.cpp@0:fb8047b156bb, 2020-01-15 (annotated)

Committer:
rahul_dahiya
Date:
Wed Jan 15 15:57:15 2020 +0530
Revision:
0:fb8047b156bb
STM32F7 LWIP

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rahul_dahiya 0:fb8047b156bb 1 /* mbed Microcontroller Library
rahul_dahiya 0:fb8047b156bb 2 * Copyright (c) 2006-2013 ARM Limited
rahul_dahiya 0:fb8047b156bb 3 *
rahul_dahiya 0:fb8047b156bb 4 * Licensed under the Apache License, Version 2.0 (the "License");
rahul_dahiya 0:fb8047b156bb 5 * you may not use this file except in compliance with the License.
rahul_dahiya 0:fb8047b156bb 6 * You may obtain a copy of the License at
rahul_dahiya 0:fb8047b156bb 7 *
rahul_dahiya 0:fb8047b156bb 8 * http://www.apache.org/licenses/LICENSE-2.0
rahul_dahiya 0:fb8047b156bb 9 *
rahul_dahiya 0:fb8047b156bb 10 * Unless required by applicable law or agreed to in writing, software
rahul_dahiya 0:fb8047b156bb 11 * distributed under the License is distributed on an "AS IS" BASIS,
rahul_dahiya 0:fb8047b156bb 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rahul_dahiya 0:fb8047b156bb 13 * See the License for the specific language governing permissions and
rahul_dahiya 0:fb8047b156bb 14 * limitations under the License.
rahul_dahiya 0:fb8047b156bb 15 */
rahul_dahiya 0:fb8047b156bb 16 #include "cmsis.h"
rahul_dahiya 0:fb8047b156bb 17 #if defined(NVIC_NUM_VECTORS)
rahul_dahiya 0:fb8047b156bb 18
rahul_dahiya 0:fb8047b156bb 19 // Suppress deprecation warnings since this whole
rahul_dahiya 0:fb8047b156bb 20 // class is deprecated already
rahul_dahiya 0:fb8047b156bb 21 #include "mbed_toolchain.h"
rahul_dahiya 0:fb8047b156bb 22 #undef MBED_DEPRECATED_SINCE
rahul_dahiya 0:fb8047b156bb 23 #define MBED_DEPRECATED_SINCE(...)
rahul_dahiya 0:fb8047b156bb 24
rahul_dahiya 0:fb8047b156bb 25 #include "drivers/InterruptManager.h"
rahul_dahiya 0:fb8047b156bb 26 #include "platform/mbed_critical.h"
rahul_dahiya 0:fb8047b156bb 27 #include <string.h>
rahul_dahiya 0:fb8047b156bb 28
rahul_dahiya 0:fb8047b156bb 29 #define CHAIN_INITIAL_SIZE 4
rahul_dahiya 0:fb8047b156bb 30
rahul_dahiya 0:fb8047b156bb 31 namespace mbed {
rahul_dahiya 0:fb8047b156bb 32
rahul_dahiya 0:fb8047b156bb 33 typedef void (*pvoidf)(void);
rahul_dahiya 0:fb8047b156bb 34
rahul_dahiya 0:fb8047b156bb 35 InterruptManager* InterruptManager::_instance = (InterruptManager*)NULL;
rahul_dahiya 0:fb8047b156bb 36
rahul_dahiya 0:fb8047b156bb 37 InterruptManager* InterruptManager::get() {
rahul_dahiya 0:fb8047b156bb 38
rahul_dahiya 0:fb8047b156bb 39 if (NULL == _instance) {
rahul_dahiya 0:fb8047b156bb 40 InterruptManager* temp = new InterruptManager();
rahul_dahiya 0:fb8047b156bb 41
rahul_dahiya 0:fb8047b156bb 42 // Atomically set _instance
rahul_dahiya 0:fb8047b156bb 43 core_util_critical_section_enter();
rahul_dahiya 0:fb8047b156bb 44 if (NULL == _instance) {
rahul_dahiya 0:fb8047b156bb 45 _instance = temp;
rahul_dahiya 0:fb8047b156bb 46 }
rahul_dahiya 0:fb8047b156bb 47 core_util_critical_section_exit();
rahul_dahiya 0:fb8047b156bb 48
rahul_dahiya 0:fb8047b156bb 49 // Another thread got there first so delete ours
rahul_dahiya 0:fb8047b156bb 50 if (temp != _instance) {
rahul_dahiya 0:fb8047b156bb 51 delete temp;
rahul_dahiya 0:fb8047b156bb 52 }
rahul_dahiya 0:fb8047b156bb 53
rahul_dahiya 0:fb8047b156bb 54 }
rahul_dahiya 0:fb8047b156bb 55 return _instance;
rahul_dahiya 0:fb8047b156bb 56 }
rahul_dahiya 0:fb8047b156bb 57
rahul_dahiya 0:fb8047b156bb 58 InterruptManager::InterruptManager() {
rahul_dahiya 0:fb8047b156bb 59 // No mutex needed in constructor
rahul_dahiya 0:fb8047b156bb 60 memset(_chains, 0, NVIC_NUM_VECTORS * sizeof(CallChain*));
rahul_dahiya 0:fb8047b156bb 61 }
rahul_dahiya 0:fb8047b156bb 62
rahul_dahiya 0:fb8047b156bb 63 void InterruptManager::destroy() {
rahul_dahiya 0:fb8047b156bb 64 // Not a good idea to call this unless NO interrupt at all
rahul_dahiya 0:fb8047b156bb 65 // is under the control of the handler; otherwise, a system crash
rahul_dahiya 0:fb8047b156bb 66 // is very likely to occur
rahul_dahiya 0:fb8047b156bb 67 if (NULL != _instance) {
rahul_dahiya 0:fb8047b156bb 68 delete _instance;
rahul_dahiya 0:fb8047b156bb 69 _instance = (InterruptManager*)NULL;
rahul_dahiya 0:fb8047b156bb 70 }
rahul_dahiya 0:fb8047b156bb 71 }
rahul_dahiya 0:fb8047b156bb 72
rahul_dahiya 0:fb8047b156bb 73 InterruptManager::~InterruptManager() {
rahul_dahiya 0:fb8047b156bb 74 for(int i = 0; i < NVIC_NUM_VECTORS; i++)
rahul_dahiya 0:fb8047b156bb 75 if (NULL != _chains[i])
rahul_dahiya 0:fb8047b156bb 76 delete _chains[i];
rahul_dahiya 0:fb8047b156bb 77 }
rahul_dahiya 0:fb8047b156bb 78
rahul_dahiya 0:fb8047b156bb 79 bool InterruptManager::must_replace_vector(IRQn_Type irq) {
rahul_dahiya 0:fb8047b156bb 80 lock();
rahul_dahiya 0:fb8047b156bb 81
rahul_dahiya 0:fb8047b156bb 82 int ret = false;
rahul_dahiya 0:fb8047b156bb 83 int irq_pos = get_irq_index(irq);
rahul_dahiya 0:fb8047b156bb 84 if (NULL == _chains[irq_pos]) {
rahul_dahiya 0:fb8047b156bb 85 _chains[irq_pos] = new CallChain(CHAIN_INITIAL_SIZE);
rahul_dahiya 0:fb8047b156bb 86 _chains[irq_pos]->add((pvoidf)NVIC_GetVector(irq));
rahul_dahiya 0:fb8047b156bb 87 ret = true;
rahul_dahiya 0:fb8047b156bb 88 }
rahul_dahiya 0:fb8047b156bb 89 unlock();
rahul_dahiya 0:fb8047b156bb 90 return ret;
rahul_dahiya 0:fb8047b156bb 91 }
rahul_dahiya 0:fb8047b156bb 92
rahul_dahiya 0:fb8047b156bb 93 pFunctionPointer_t InterruptManager::add_common(void (*function)(void), IRQn_Type irq, bool front) {
rahul_dahiya 0:fb8047b156bb 94 lock();
rahul_dahiya 0:fb8047b156bb 95 int irq_pos = get_irq_index(irq);
rahul_dahiya 0:fb8047b156bb 96 bool change = must_replace_vector(irq);
rahul_dahiya 0:fb8047b156bb 97
rahul_dahiya 0:fb8047b156bb 98 pFunctionPointer_t pf = front ? _chains[irq_pos]->add_front(function) : _chains[irq_pos]->add(function);
rahul_dahiya 0:fb8047b156bb 99 if (change)
rahul_dahiya 0:fb8047b156bb 100 NVIC_SetVector(irq, (uint32_t)&InterruptManager::static_irq_helper);
rahul_dahiya 0:fb8047b156bb 101 unlock();
rahul_dahiya 0:fb8047b156bb 102 return pf;
rahul_dahiya 0:fb8047b156bb 103 }
rahul_dahiya 0:fb8047b156bb 104
rahul_dahiya 0:fb8047b156bb 105 bool InterruptManager::remove_handler(pFunctionPointer_t handler, IRQn_Type irq) {
rahul_dahiya 0:fb8047b156bb 106 int irq_pos = get_irq_index(irq);
rahul_dahiya 0:fb8047b156bb 107 bool ret = false;
rahul_dahiya 0:fb8047b156bb 108
rahul_dahiya 0:fb8047b156bb 109 lock();
rahul_dahiya 0:fb8047b156bb 110 if (_chains[irq_pos] != NULL) {
rahul_dahiya 0:fb8047b156bb 111 if (_chains[irq_pos]->remove(handler)) {
rahul_dahiya 0:fb8047b156bb 112 ret = true;
rahul_dahiya 0:fb8047b156bb 113 }
rahul_dahiya 0:fb8047b156bb 114 }
rahul_dahiya 0:fb8047b156bb 115 unlock();
rahul_dahiya 0:fb8047b156bb 116
rahul_dahiya 0:fb8047b156bb 117 return ret;
rahul_dahiya 0:fb8047b156bb 118 }
rahul_dahiya 0:fb8047b156bb 119
rahul_dahiya 0:fb8047b156bb 120 void InterruptManager::irq_helper() {
rahul_dahiya 0:fb8047b156bb 121 _chains[__get_IPSR()]->call();
rahul_dahiya 0:fb8047b156bb 122 }
rahul_dahiya 0:fb8047b156bb 123
rahul_dahiya 0:fb8047b156bb 124 int InterruptManager::get_irq_index(IRQn_Type irq) {
rahul_dahiya 0:fb8047b156bb 125 // Pure function - no lock needed
rahul_dahiya 0:fb8047b156bb 126 return (int)irq + NVIC_USER_IRQ_OFFSET;
rahul_dahiya 0:fb8047b156bb 127 }
rahul_dahiya 0:fb8047b156bb 128
rahul_dahiya 0:fb8047b156bb 129 void InterruptManager::static_irq_helper() {
rahul_dahiya 0:fb8047b156bb 130 InterruptManager::get()->irq_helper();
rahul_dahiya 0:fb8047b156bb 131 }
rahul_dahiya 0:fb8047b156bb 132
rahul_dahiya 0:fb8047b156bb 133 void InterruptManager::lock() {
rahul_dahiya 0:fb8047b156bb 134 _mutex.lock();
rahul_dahiya 0:fb8047b156bb 135 }
rahul_dahiya 0:fb8047b156bb 136
rahul_dahiya 0:fb8047b156bb 137 void InterruptManager::unlock() {
rahul_dahiya 0:fb8047b156bb 138 _mutex.unlock();
rahul_dahiya 0:fb8047b156bb 139 }
rahul_dahiya 0:fb8047b156bb 140
rahul_dahiya 0:fb8047b156bb 141 } // namespace mbed
rahul_dahiya 0:fb8047b156bb 142
rahul_dahiya 0:fb8047b156bb 143 #endif