66 lines
1.5 KiB
C
66 lines
1.5 KiB
C
/* stack.h - stack helpers for Cortex-M CPUs */
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/*
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* Copyright (c) 2013-2014 Wind River Systems, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* 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,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* DESCRIPTION
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* Stack helper functions.
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*/
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#ifndef _ARM_CORTEXM_STACK__H_
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#define _ARM_CORTEXM_STACK__H_
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#include <nano_private.h>
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#include <asm_inline.h>
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#ifdef CONFIG_STACK_ALIGN_DOUBLE_WORD
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#define STACK_ALIGN_SIZE 8
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#else
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#define STACK_ALIGN_SIZE 4
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#endif
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#ifdef _ASMLANGUAGE
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/* nothing */
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#else
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#define __GET_MSP() \
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STACK_ROUND_DOWN(&_interrupt_stack[CONFIG_ISR_STACK_SIZE - 1])
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extern char _interrupt_stack[CONFIG_ISR_STACK_SIZE];
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/**
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*
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* @brief Setup interrupt stack
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*
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* On Cortex-M, the interrupt stack is registered in the MSP (main stack
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* pointer) register, and switched to automatically when taking an exception.
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*
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* @return N/A
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*/
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static ALWAYS_INLINE void _InterruptStackSetup(void)
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{
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uint32_t msp = __GET_MSP();
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_MspSet(msp);
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}
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#endif /* _ASMLANGUAGE */
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#endif /* _ARM_CORTEXM_STACK__H_ */
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