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74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
/*
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* Copyright (C) 2013 Freie Universität Berlin
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*
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* This file subject to the terms and conditions of the GNU Lesser General
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* Public License. See the file LICENSE in the top level directory for more
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* details.
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*/
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/**
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* @defgroup core_irq IRQ Handling
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* @ingroup core
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* @brief Provides an API to control interrupt processing
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* @{
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*
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* @file irq.h
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* @brief IRQ driver interface
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*
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* @author Freie Universität Berlin, Computer Systems & Telematics
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*/
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#ifndef IRQ_H_
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#define IRQ_H_
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#include <stdbool.h>
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#include "arch/irq_arch.h"
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/**
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* @brief This function sets the IRQ disable bit in the status register
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*
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* @note This function should be used in favour of dINT().
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*
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* @return Previous value of status register. The return value should not
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* interpreted as a boolean value. The actual value is only
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* significant for restoreIRQ().
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*
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* @see restoreIRQ
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*/
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unsigned disableIRQ(void);
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/**
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* @brief This function clears the IRQ disable bit in the status register
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*
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* @note This function should be used in favour of eINT().
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*
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* @return Previous value of status register. The return value should not
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* interpreted as a boolean value. The actual value is only
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* significant for restoreIRQ().
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*
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* @see restoreIRQ
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*/
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unsigned enableIRQ(void);
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/**
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* @brief This function restores the IRQ disable bit in the status register
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* to the value contained within passed state
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*
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* @param[in] state state to restore
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*
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* @note This function should be used in favour of eINT().
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*
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* @see enableIRQ
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* @see disableIRQ
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*/
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void restoreIRQ(unsigned state);
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/**
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* @brief Check whether called from interrupt service routine
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* @return true, if in interrupt service routine, false if not
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*/
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int inISR(void);
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#endif /* IRQ_H_ */
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/** @} */
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