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/*
* Copyright (C) 2014 Freie Universitรคt Berlin
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @ingroup core_arch
* @{
*
* @file
* @brief Interrupt handling interface for globally en- and disabling interrupts
*
* This file acts as a wrapper between the kernels interrupt interface and the architecture
* dependent implementation of the interfaces.
*
* @note All functions in this module have to be implemented in a way that it
* is safe to call them from within the context of an ISR.
*
* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
*/
#ifndef IRQ_ARCH_H
#define IRQ_ARCH_H
#ifdef __cplusplus
extern "C" {
#endif
/**
* @name Define mapping between kernel internal and arch interfaces
*
* This mapping is done for compatibility of existing platforms,
* new platforms should always use the *_arch_* interfaces.
* @{
*/
#ifdef COREIF_NG
#define irq_enable irq_arch_enable
#define irq_disable irq_arch_disable
#define irq_restore irq_arch_restore
#define irq_is_in irq_arch_in
#endif
/** @} */
/**
* @brief Globally enable maskable interrupt sources
*
* @return the IRQ state after enabling interrupts
*/
unsigned int irq_arch_enable(void);
/**
* @brief Globally disable all maskable interrupt sources
*
* @return the IRQ state before disabling interrupts
*/
unsigned int irq_arch_disable(void);
/**
* @brief Restore a previously recorded IRQ state
*
* @param[in] state the state to set the IRQ flags to
*/
void irq_arch_restore(unsigned int state);
/**
* @brief See if the current context is inside an ISR
*
* @return 1 if currently in interrupt context, 0 otherwise
*/
int irq_arch_in(void);
#ifdef __cplusplus
}
#endif
#endif /* IRQ_ARCH_H */
/** @} */
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