67 lines
2.1 KiB
C
67 lines
2.1 KiB
C
/****************************************************************************
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* arch/arm/src/armv7-m/arm_systemreset.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <nuttx/arch.h>
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#include <nuttx/board.h>
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#include "arm_internal.h"
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#include "nvic.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_systemreset
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*
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* Description:
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* Internal, Cortex-M0 reset logic.
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*
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****************************************************************************/
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void up_systemreset(void)
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{
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uint32_t regval;
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/* Set up for the system reset, retaining the priority group from the
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* the AIRCR register.
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*/
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regval = getreg32(NVIC_AIRCR) & NVIC_AIRCR_PRIGROUP_MASK;
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regval |= (NVIC_AIRCR_VECTKEY | NVIC_AIRCR_SYSRESETREQ);
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putreg32(regval, NVIC_AIRCR);
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/* Ensure completion of memory accesses */
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__asm volatile ("dsb");
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/* Wait for the reset */
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for (; ; );
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}
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