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59 lines
1.0 KiB
C
59 lines
1.0 KiB
C
/*
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* Copyright (C) 2014 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser General
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* Public License v2.1. 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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* @ingroup cpu_cortexm0_common
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* @{
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*
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* @file
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* @brief Implementation of the kernels irq interface
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*
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* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
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*
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* @}
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*/
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#include <stdint.h>
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#include "arch/irq_arch.h"
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#include "cpu.h"
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/**
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* @brief Disable all maskable interrupts
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*/
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unsigned int irq_arch_disable(void)
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{
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uint32_t mask = __get_PRIMASK();
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__disable_irq();
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return mask;
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}
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/**
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* @brief Enable all maskable interrupts
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*/
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unsigned int irq_arch_enable(void)
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{
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__enable_irq();
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return __get_PRIMASK();
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}
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/**
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* @brief Restore the state of the IRQ flags
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*/
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void irq_arch_restore(unsigned int state)
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{
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__set_PRIMASK(state);
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}
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/**
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* @brief See if the current context is inside an ISR
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*/
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int irq_arch_in(void)
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{
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return (__get_IPSR() & 0xFF);
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}
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