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9ad9f400e6
register is deprecated when building C++11 code and removed in C++17, using it will cause build failures with C++ and -Werror. The register hint keyword is likely ignored in GCC anyway.
88 lines
2.1 KiB
C
88 lines
2.1 KiB
C
/*
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* Copyright (C) 2014-2015 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @defgroup cpu_cortexm_common ARM Cortex-M common
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* @ingroup cpu
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* @brief Common implementations and headers for Cortex-M family based
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* micro-controllers
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* @{
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*
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* @file
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* @brief Basic definitions for the Cortex-M common module
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*
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* When ever you want to do something hardware related, that is accessing MCUs
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* registers, just include this file. It will then make sure that the MCU
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* specific headers are included.
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*
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* @author Stefan Pfeiffer <stefan.pfeiffer@fu-berlin.de>
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* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
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* @author Joakim Nohlgård <joakim.nohlgard@eistec.se>
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*
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* @todo remove include irq.h once core was adjusted
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*/
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#ifndef CPU_H_
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#define CPU_H_
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#include <stdio.h>
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#include "cpu_conf.h"
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#include "irq.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Some members of the Cortex-M family have architecture specific
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* atomic operations in atomic_arch.c
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*/
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#if defined(CPU_ARCH_CORTEX_M3) || defined(CPU_ARCH_CORTEX_M4) || \
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defined(CPU_ARCH_CORTEX_M4F)
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#define ARCH_HAS_ATOMIC_COMPARE_AND_SWAP 1
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#endif
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/**
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* @brief Initialization of the CPU
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*/
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void cpu_init(void);
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/**
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* @brief Initialize Cortex-M specific core parts of the CPU
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*/
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void cortexm_init(void);
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/**
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* @brief Prints the current content of the link register (lr)
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*/
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static inline void cpu_print_last_instruction(void)
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{
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uint32_t *lr_ptr;
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__asm__ __volatile__("mov %0, lr" : "=r"(lr_ptr));
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printf("%p\n", (void*) lr_ptr);
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}
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/**
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* @brief Put the CPU into the 'wait for event' sleep mode
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*
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* This function is meant to be used for short periods of time, where it is not
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* feasible to switch to the idle thread and back.
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*/
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static inline void cpu_sleep_until_event(void)
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{
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__WFE();
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* CPU_H_ */
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/** @} */
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