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110 lines
2.8 KiB
110 lines
2.8 KiB
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __ISR_H
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#define __ISR_H
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#include <stdbool.h>
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#include <stdint.h>
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#include <cpu.h>
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#include <list.h>
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#include <util.h>
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#include <seos.h>
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struct ChainedInterrupt {
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link_t isrs;
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void (*const enable)(struct ChainedInterrupt *);
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void (*const disable)(struct ChainedInterrupt *);
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};
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struct ChainedIsr {
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link_t node;
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uint32_t maxLatencyNs;
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bool (*func)(struct ChainedIsr *);
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uint16_t tid;
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};
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static inline void chainIsr(struct ChainedInterrupt *interrupt, struct ChainedIsr *isr)
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{
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interrupt->disable(interrupt);
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isr->tid = osGetCurrentTid();
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list_add_tail(&interrupt->isrs, &isr->node);
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interrupt->enable(interrupt);
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}
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static inline void unchainIsr(struct ChainedInterrupt *interrupt, struct ChainedIsr *isr)
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{
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interrupt->disable(interrupt);
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isr->tid = 0;
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list_delete(&isr->node);
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if (!list_is_empty(&interrupt->isrs))
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interrupt->enable(interrupt);
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}
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static inline bool dispatchIsr(struct ChainedInterrupt *interrupt)
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{
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struct link_t *cur, *tmp;
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bool handled = false;
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uint16_t oldTid = osGetCurrentTid();
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list_iterate(&interrupt->isrs, cur, tmp) {
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struct ChainedIsr *curIsr = container_of(cur, struct ChainedIsr, node);
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osSetCurrentTid(curIsr->tid);
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handled = curIsr->func(curIsr);
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if (handled)
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break;
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}
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osSetCurrentTid(oldTid);
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return handled;
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}
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static inline int unchainIsrAll(struct ChainedInterrupt *interrupt, uint32_t tid)
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{
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int count = 0;
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struct link_t *cur, *tmp;
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list_iterate(&interrupt->isrs, cur, tmp) {
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struct ChainedIsr *curIsr = container_of(cur, struct ChainedIsr, node);
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if (curIsr->tid == tid) {
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unchainIsr(interrupt, curIsr);
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count++;
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}
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}
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return count;
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}
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static inline uint32_t maxLatencyIsr(struct ChainedInterrupt *interrupt)
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{
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struct link_t *cur, *tmp;
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uint32_t latency = 0;
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list_iterate(&interrupt->isrs, cur, tmp) {
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struct ChainedIsr *curIsr = container_of(cur, struct ChainedIsr, node);
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if (!latency || (curIsr->maxLatencyNs && curIsr->maxLatencyNs < latency))
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latency = curIsr->maxLatencyNs;
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}
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return latency;
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}
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#endif /* __ISR_H */
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