149 lines
4.4 KiB
C
149 lines
4.4 KiB
C
/** @defgroup CM3_cortex_defines Cortex Core Defines
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*
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* @brief <b>libopencm3 Defined Constants and Types for the Cortex Core </b>
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*
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* @ingroup CM3_defines
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*
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* @version 1.0.0
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*
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* LGPL License Terms @ref lgpl_license
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*/
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/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2013 Ben Gamari <bgamari@gmail.com>
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* Copyright (C) 2013 Frantisek Burian <BuFran@seznam.cz>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef LIBOPENCM3_CORTEX_H
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#define LIBOPENCM3_CORTEX_H
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/**@{*/
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/*---------------------------------------------------------------------------*/
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/** @brief Cortex M Enable interrupts
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*
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* Disable the interrupt mask and enable interrupts globally
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*/
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static inline void cm_enable_interrupts(void)
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{
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__asm__("CPSIE I\n");
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}
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/*---------------------------------------------------------------------------*/
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/** @brief Cortex M Disable interrupts
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*
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* Mask all interrupts globally
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*/
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static inline void cm_disable_interrupts(void)
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{
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__asm__("CPSID I\n");
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}
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/*---------------------------------------------------------------------------*/
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/** @brief Cortex M Enable faults
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*
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* Disable the HardFault mask and enable fault interrupt globally
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*/
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static inline void cm_enable_faults(void)
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{
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__asm__("CPSIE F\n");
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}
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/*---------------------------------------------------------------------------*/
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/** @brief Cortex M Disable faults
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*
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* Mask the HardFault interrupt globally
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*/
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static inline void cm_disable_faults(void)
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{
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__asm__("CPSID F\n");
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}
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/*---------------------------------------------------------------------------*/
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/** @brief Cortex M Check if interrupts are masked
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*
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* Checks, if interrupts are masked (disabled).
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*
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* @returns true, if interrupts are disabled.
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*/
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__attribute__(( always_inline ))
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static inline bool cm_is_masked_interrupts(void)
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{
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register uint32_t result;
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__asm__ ("MRS %0, PRIMASK" : "=r" (result) );
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return (result);
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}
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/*---------------------------------------------------------------------------*/
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/** @brief Cortex M Check if Fault interrupt is masked
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*
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* Checks, if HardFault interrupt is masked (disabled).
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*
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* @returns bool true, if HardFault interrupt is disabled.
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*/
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__attribute__(( always_inline ))
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static inline bool cm_is_masked_faults(void)
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{
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register uint32_t result;
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__asm__ ("MRS %0, FAULTMASK" : "=r" (result) );
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return (result);
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}
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/*---------------------------------------------------------------------------*/
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/** @brief Cortex M Mask interrupts
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*
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* This function switches the mask of the interrupts. If mask is true, the
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* interrupts will be disabled. The result of this function can be used for
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* restoring previous state of the mask.
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*
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* @param[in] mask bool New state of the interrupt mask
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* @returns bool old state of the interrupt mask
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*/
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__attribute__(( always_inline ))
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static inline bool cm_mask_interrupts(bool mask)
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{
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register bool old;
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__asm__ __volatile__("MRS %0, PRIMASK" : "=r" (old));
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__asm__ __volatile__("" ::: "memory");
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__asm__ __volatile__("MSR PRIMASK, %0" : : "r" (mask));
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return old;
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}
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/*---------------------------------------------------------------------------*/
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/** @brief Cortex M Mask HardFault interrupt
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*
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* This function switches the mask of the HardFault interrupt. If mask is true,
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* the HardFault interrupt will be disabled. The result of this function can be
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* used for restoring previous state of the mask.
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*
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* @param[in] mask bool New state of the HardFault interrupt mask
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* @returns bool old state of the HardFault interrupt mask
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*/
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__attribute__(( always_inline ))
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static inline bool cm_mask_faults(bool mask)
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{
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register bool old;
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__asm__ __volatile__ ("MRS %0, FAULTMASK" : "=r" (old));
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__asm__ __volatile__("" ::: "memory");
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__asm__ __volatile__ ("MSR FAULTMASK, %0" : : "r" (mask));
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return old;
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}
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/**@}*/
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#endif
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