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58 lines
1.0 KiB
58 lines
1.0 KiB
/* |
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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_cortex-m3 |
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* @{ |
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* |
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* @file irq_arch.c |
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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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