1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef __ISR_H 18 #define __ISR_H 19 20 #include <stdbool.h> 21 #include <stdint.h> 22 23 #include <cpu.h> 24 #include <list.h> 25 #include <util.h> 26 #include <seos.h> 27 28 struct ChainedInterrupt { 29 link_t isrs; 30 31 void (*const enable)(struct ChainedInterrupt *); 32 void (*const disable)(struct ChainedInterrupt *); 33 }; 34 35 struct ChainedIsr { 36 link_t node; 37 bool (*func)(struct ChainedIsr *); 38 uint16_t tid; 39 }; 40 41 static inline void chainIsr(struct ChainedInterrupt *interrupt, struct ChainedIsr *isr) 42 { 43 interrupt->disable(interrupt); 44 list_add_tail(&interrupt->isrs, &isr->node); 45 interrupt->enable(interrupt); 46 } 47 48 static inline void unchainIsr(struct ChainedInterrupt *interrupt, struct ChainedIsr *isr) 49 { 50 interrupt->disable(interrupt); 51 isr->tid = 0; 52 list_delete(&isr->node); 53 if (!list_is_empty(&interrupt->isrs)) 54 interrupt->enable(interrupt); 55 } 56 57 static inline bool dispatchIsr(struct ChainedInterrupt *interrupt) 58 { 59 struct link_t *cur, *tmp; 60 bool handled = false; 61 uint16_t oldTid = osGetCurrentTid(); 62 63 list_iterate(&interrupt->isrs, cur, tmp) { 64 struct ChainedIsr *curIsr = container_of(cur, struct ChainedIsr, node); 65 osSetCurrentTid(curIsr->tid); 66 handled = curIsr->func(curIsr); 67 if (handled) 68 break; 69 } 70 osSetCurrentTid(oldTid); 71 72 return handled; 73 } 74 75 static inline int unchainIsrAll(struct ChainedInterrupt *interrupt, uint32_t tid) 76 { 77 int count = 0; 78 struct link_t *cur, *tmp; 79 80 list_iterate(&interrupt->isrs, cur, tmp) { 81 struct ChainedIsr *curIsr = container_of(cur, struct ChainedIsr, node); 82 if (curIsr->tid == tid) { 83 unchainIsr(interrupt, curIsr); 84 count++; 85 } 86 } 87 88 return count; 89 } 90 91 #endif /* __ISR_H */ 92
