112 lines
3.8 KiB
C
112 lines
3.8 KiB
C
/*
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* Copyright (c) 2012, Texas Instruments Incorporated - http://www.ti.com/
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \addtogroup cc2538-nvic
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* @{
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*
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* \file
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* Driver for the cc2538 NVIC
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* All interrupt-related functionality is implemented here
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*/
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#include "contiki.h"
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#include "dev/nvic.h"
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#include "dev/scb.h"
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#include "reg.h"
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#include <stdint.h>
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static uint32_t *interrupt_enable;
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static uint32_t *interrupt_disable;
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static uint32_t *interrupt_pend;
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static uint32_t *interrupt_unpend;
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/*---------------------------------------------------------------------------*/
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void
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nvic_init()
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{
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interrupt_enable = (uint32_t *)NVIC_EN0;
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interrupt_disable = (uint32_t *)NVIC_DIS0;
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interrupt_pend = (uint32_t *)NVIC_PEND0;
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interrupt_unpend = (uint32_t *)NVIC_UNPEND0;
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/* Provide our interrupt table to the NVIC */
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REG(SCB_VTABLE) = NVIC_VTABLE_ADDRESS;
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}
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/*---------------------------------------------------------------------------*/
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void
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nvic_interrupt_enable(uint32_t intr)
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{
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/* Writes of 0 are ignored, which is why we can simply use = */
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interrupt_enable[intr >> 5] = 1 << (intr & 0x1F);
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}
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/*---------------------------------------------------------------------------*/
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void
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nvic_interrupt_disable(uint32_t intr)
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{
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/* Writes of 0 are ignored, which is why we can simply use = */
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interrupt_disable[intr >> 5] = 1 << (intr & 0x1F);
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}
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/*---------------------------------------------------------------------------*/
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void
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nvic_interrupt_en_restore(uint32_t intr, uint8_t v)
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{
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if(v != 1) {
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return;
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}
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interrupt_enable[intr >> 5] = 1 << (intr & 0x1F);
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}
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/*---------------------------------------------------------------------------*/
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uint8_t
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nvic_interrupt_en_save(uint32_t intr)
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{
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uint8_t rv = ((interrupt_enable[intr >> 5] & (1 << (intr & 0x1F)))
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> NVIC_INTERRUPT_DISABLED);
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nvic_interrupt_disable(intr);
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return rv;
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}
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/*---------------------------------------------------------------------------*/
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void
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nvic_interrupt_pend(uint32_t intr)
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{
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/* Writes of 0 are ignored, which is why we can simply use = */
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interrupt_pend[intr >> 5] = 1 << (intr & 0x1F);
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}
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/*---------------------------------------------------------------------------*/
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void
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nvic_interrupt_unpend(uint32_t intr)
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{
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/* Writes of 0 are ignored, which is why we can simply use = */
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interrupt_unpend[intr >> 5] = 1 << (intr & 0x1F);
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}
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/** @} */
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