* arch/arm/src/sama5/sam_systemreset.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <assert.h>
#include <nuttx/arch.h>
#include <nuttx/board.h>
#include <arch/sama5/chip.h>
#include "arm_internal.h"
#include "hardware/sam_rstc.h"
#ifdef CONFIG_SAMA5_SYSTEMRESET
* Public Functions
****************************************************************************/
* Name: up_systemreset
*
* Description:
* Internal reset logic.
*
****************************************************************************/
void up_systemreset(void)
{
uint32_t rstcr;
#if defined(CONFIG_SAMA5_EXTRESET_ERST) && CONFIG_SAMA5_EXTRESET_ERST != 0
uint32_t rstmr;
#endif
rstcr = (RSTC_CR_PROCRST | RSTC_CR_KEY);
#if defined(CONFIG_ARCH_CHIP_SAMA5D3)
rstcr |= RSTC_CR_PERRST;
#endif
#if defined(CONFIG_SAMA5_EXTRESET_ERST) && CONFIG_SAMA5_EXTRESET_ERST != 0
rstcr |= RSTC_CR_EXTRST;
rstmr = getreg32(SAM_RSTC_MR);
rstmr &= ~RSTC_MR_ERSTL_MASK;
rstmr &= RSTC_MR_ERSTL(CONFIG_SAMA5_EXTRESET_ERST - 1) | RSTC_MR_KEY;
putreg32(rstmr, SAM_RSTC_MR);
#endif
putreg32(rstcr, SAM_RSTC_CR);
for (; ; );
}
#endif