63 lines
2.2 KiB
C
63 lines
2.2 KiB
C
/****************************************************************************
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* arch/arm/src/armv8-m/arm_copyfullstate.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 <arch/irq.h>
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#include "arm_internal.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: arm_copyfullstate
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*
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* Description:
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* Copy the entire register save area (including the floating point
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* registers if applicable). This is a little faster than most memcpy's
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* since it does 32-bit transfers.
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*
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****************************************************************************/
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void arm_copyfullstate(uint32_t *dest, uint32_t *src)
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{
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int i;
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/* In the Cortex-M3 model, the state is copied from the stack to the TCB,
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* but only a reference is passed to get the state from the TCB. So the
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* following check avoids copying the TCB save area onto itself:
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*/
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if (src != dest)
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{
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for (i = 0; i < XCPTCONTEXT_REGS; i++)
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{
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*dest++ = *src++;
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}
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}
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}
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