| /* |
| * Copyright (c) 2013-2014 Wind River Systems, Inc. |
| * |
| * Licensed 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. |
| */ |
| |
| /** |
| * @file |
| * @brief Stack helpers for Cortex-M CPUs |
| * |
| * Stack helper functions. |
| */ |
| |
| #ifndef _ARM_CORTEXM_STACK__H_ |
| #define _ARM_CORTEXM_STACK__H_ |
| |
| #include <nano_private.h> |
| #include <asm_inline.h> |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #ifdef CONFIG_STACK_ALIGN_DOUBLE_WORD |
| #define STACK_ALIGN_SIZE 8 |
| #else |
| #define STACK_ALIGN_SIZE 4 |
| #endif |
| |
| #ifdef _ASMLANGUAGE |
| |
| /* nothing */ |
| |
| #else |
| |
| #define __GET_MSP() \ |
| STACK_ROUND_DOWN(&_interrupt_stack[CONFIG_ISR_STACK_SIZE - 1]) |
| |
| extern char _interrupt_stack[CONFIG_ISR_STACK_SIZE]; |
| |
| /** |
| * |
| * @brief Setup interrupt stack |
| * |
| * On Cortex-M, the interrupt stack is registered in the MSP (main stack |
| * pointer) register, and switched to automatically when taking an exception. |
| * |
| * @return N/A |
| */ |
| static ALWAYS_INLINE void _InterruptStackSetup(void) |
| { |
| uint32_t msp = __GET_MSP(); |
| |
| _MspSet(msp); |
| } |
| |
| #endif /* _ASMLANGUAGE */ |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* _ARM_CORTEXM_STACK__H_ */ |