96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
/* taskDevInt.h - APIs for managing task IRQ objects */
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/*
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* Copyright (c) 2013-2014 Wind River Systems, Inc.
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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 TASK_IRQ_H
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#define TASK_IRQ_H
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/**
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* @brief Microkernel Interrupt Services
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* @defgroup microkernel_irq Microkernel Interrupt Services
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* @ingroup microkernel_services
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* @{
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*/
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#include <microkernel/base_api.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define INVALID_VECTOR 0xFFFFFFFF
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/**
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*
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* @brief Register a task IRQ object
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*
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* This routine connects a task IRQ object to a system interrupt based
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* upon the specified IRQ and priority values.
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*
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* IRQ allocation is done via the microkernel server fiber so that simultaneous
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* allocation requests are single-threaded.
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*
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* @param irq_obj IRQ object identifier
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* @param irq Request IRQ
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* @param priority Requested interrupt priority
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* @param flags IRQ flags
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*
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* @return assigned interrupt vector if successful, INVALID_VECTOR if not
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*/
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extern uint32_t task_irq_alloc(kirq_t irq_obj, uint32_t irq, uint32_t priority,
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uint32_t flags);
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/**
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*
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* @brief Re-enable a task IRQ object's interrupt
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*
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* This re-enables the interrupt for a task IRQ object.
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* @param irq_obj IRQ object identifier
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* @return N/A
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*/
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extern void task_irq_ack(kirq_t irq_obj);
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/**
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* @brief Wait for task IRQ to signal an interrupt
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*
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* This routine waits up to @a timeout ticks for the IRQ object @a irq_obj
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* to signal an interrupt.
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*
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* @param irq_obj IRQ object identifier
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* @param timeout Affects the action taken should the task IRQ not yet be
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* signaled. If TICKS_NONE, the return immediately. If TICKS_UNLIMITED, then
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* wait as long as necessary. Otherwise wait up to the specified number of
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* ticks before timing out.
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*
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* @retval RC_OK Successfully detected signaled interrupt
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* @retval RC_TIME Timed out while waiting for interrupt
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* @retval RC_FAIL Failed to immediately detect signaled interrupt when
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* @a timeout = TICKS_NONE
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*/
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extern int task_irq_wait(kirq_t irq_obj, int32_t timeout);
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/**
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* @}
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*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* TASK_IRQ_H */
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