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66 lines
1.0 KiB
C
66 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
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup cpu
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* @{
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*
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* @file
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* @brief ISR related functions
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*
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* @author Kaspar Schleiser <kaspar@schleiser.de>
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* @author Oliver Hahm <oliver.hahm@inria.fr>
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*
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* @}
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*/
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#include "irq.h"
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#include "cpu.h"
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volatile int __irq_is_in = 0;
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char __isr_stack[ISR_STACKSIZE];
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unsigned int irq_disable(void)
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{
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unsigned int state;
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__asm__("mov.w r2,%0" : "=r"(state));
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state &= GIE;
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if (state) {
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__disable_irq();
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}
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return state;
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}
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unsigned int irq_enable(void)
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{
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unsigned int state;
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__asm__("mov.w r2,%0" : "=r"(state));
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state &= GIE;
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if (!state) {
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__enable_irq();
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}
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return state;
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}
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void irq_restore(unsigned int state)
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{
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if (state) {
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__enable_irq();
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}
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}
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int irq_is_in(void)
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{
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return __irq_is_in;
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}
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