785 lines
16 KiB
C
785 lines
16 KiB
C
/**************************************************************************//**
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* @file core_cm3.c
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* @brief CMSIS Cortex-M3 Core Peripheral Access Layer Source File
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* @version V1.30
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* @date 30. October 2009
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*
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* @note
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* Copyright (C) 2009 ARM Limited. All rights reserved.
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*
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* @par
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* ARM Limited (ARM) is supplying this software for use with Cortex-M
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* processor based microcontrollers. This file can be freely distributed
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* within development tools that are supporting such ARM based processors.
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*
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* @par
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* THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED
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* OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
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* ARM SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR
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* CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
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*
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******************************************************************************/
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#include <stdint.h>
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/* define compiler specific symbols */
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#if defined ( __CC_ARM )
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#define __ASM __asm /*!< asm keyword for ARM Compiler */
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#define __INLINE __inline /*!< inline keyword for ARM Compiler */
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#elif defined ( __ICCARM__ )
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#define __ASM __asm /*!< asm keyword for IAR Compiler */
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#define __INLINE inline /*!< inline keyword for IAR Compiler. Only avaiable in High optimization mode! */
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#elif defined ( __GNUC__ )
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#define __ASM __asm /*!< asm keyword for GNU Compiler */
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#define __INLINE inline /*!< inline keyword for GNU Compiler */
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#elif defined ( __TASKING__ )
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#define __ASM __asm /*!< asm keyword for TASKING Compiler */
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#define __INLINE inline /*!< inline keyword for TASKING Compiler */
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#endif
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/* ################### Compiler specific Intrinsics ########################### */
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#if defined ( __CC_ARM ) /*------------------RealView Compiler -----------------*/
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/* ARM armcc specific functions */
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/**
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* @brief Return the Process Stack Pointer
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*
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* @return ProcessStackPointer
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*
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* Return the actual process stack pointer
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*/
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__ASM uint32_t __get_PSP(void)
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{
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mrs r0, psp
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bx lr
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}
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/**
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* @brief Set the Process Stack Pointer
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*
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* @param topOfProcStack Process Stack Pointer
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*
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* Assign the value ProcessStackPointer to the MSP
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* (process stack pointer) Cortex processor register
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*/
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__ASM void __set_PSP(uint32_t topOfProcStack)
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{
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msr psp, r0
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bx lr
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}
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/**
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* @brief Return the Main Stack Pointer
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*
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* @return Main Stack Pointer
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*
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* Return the current value of the MSP (main stack pointer)
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* Cortex processor register
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*/
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__ASM uint32_t __get_MSP(void)
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{
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mrs r0, msp
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bx lr
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}
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/**
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* @brief Set the Main Stack Pointer
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*
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* @param topOfMainStack Main Stack Pointer
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*
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* Assign the value mainStackPointer to the MSP
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* (main stack pointer) Cortex processor register
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*/
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__ASM void __set_MSP(uint32_t mainStackPointer)
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{
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msr msp, r0
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bx lr
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}
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/**
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* @brief Reverse byte order in unsigned short value
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*
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* @param value value to reverse
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* @return reversed value
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*
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* Reverse byte order in unsigned short value
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*/
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__ASM uint32_t __REV16(uint16_t value)
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{
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rev16 r0, r0
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bx lr
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}
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/**
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* @brief Reverse byte order in signed short value with sign extension to integer
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*
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* @param value value to reverse
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* @return reversed value
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*
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* Reverse byte order in signed short value with sign extension to integer
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*/
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__ASM int32_t __REVSH(int16_t value)
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{
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revsh r0, r0
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bx lr
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}
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#if (__ARMCC_VERSION < 400000)
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/**
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* @brief Remove the exclusive lock created by ldrex
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*
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* Removes the exclusive lock which is created by ldrex.
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*/
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__ASM void __CLREX(void)
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{
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clrex
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}
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/**
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* @brief Return the Base Priority value
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*
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* @return BasePriority
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*
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* Return the content of the base priority register
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*/
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__ASM uint32_t __get_BASEPRI(void)
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{
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mrs r0, basepri
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bx lr
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}
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/**
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* @brief Set the Base Priority value
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*
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* @param basePri BasePriority
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*
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* Set the base priority register
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*/
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__ASM void __set_BASEPRI(uint32_t basePri)
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{
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msr basepri, r0
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bx lr
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}
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/**
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* @brief Return the Priority Mask value
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*
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* @return PriMask
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*
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* Return state of the priority mask bit from the priority mask register
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*/
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__ASM uint32_t __get_PRIMASK(void)
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{
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mrs r0, primask
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bx lr
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}
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/**
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* @brief Set the Priority Mask value
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*
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* @param priMask PriMask
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*
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* Set the priority mask bit in the priority mask register
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*/
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__ASM void __set_PRIMASK(uint32_t priMask)
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{
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msr primask, r0
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bx lr
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}
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/**
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* @brief Return the Fault Mask value
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*
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* @return FaultMask
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*
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* Return the content of the fault mask register
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*/
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__ASM uint32_t __get_FAULTMASK(void)
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{
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mrs r0, faultmask
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bx lr
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}
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/**
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* @brief Set the Fault Mask value
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*
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* @param faultMask faultMask value
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*
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* Set the fault mask register
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*/
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__ASM void __set_FAULTMASK(uint32_t faultMask)
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{
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msr faultmask, r0
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bx lr
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}
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/**
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* @brief Return the Control Register value
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*
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* @return Control value
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*
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* Return the content of the control register
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*/
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__ASM uint32_t __get_CONTROL(void)
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{
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mrs r0, control
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bx lr
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}
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/**
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* @brief Set the Control Register value
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*
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* @param control Control value
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*
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* Set the control register
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*/
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__ASM void __set_CONTROL(uint32_t control)
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{
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msr control, r0
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bx lr
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}
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#endif /* __ARMCC_VERSION */
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#elif (defined (__ICCARM__)) /*------------------ ICC Compiler -------------------*/
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/* IAR iccarm specific functions */
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#pragma diag_suppress=Pe940
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/**
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* @brief Return the Process Stack Pointer
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*
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* @return ProcessStackPointer
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*
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* Return the actual process stack pointer
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*/
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uint32_t __get_PSP(void)
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{
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__ASM("mrs r0, psp");
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__ASM("bx lr");
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}
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/**
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* @brief Set the Process Stack Pointer
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*
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* @param topOfProcStack Process Stack Pointer
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*
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* Assign the value ProcessStackPointer to the MSP
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* (process stack pointer) Cortex processor register
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*/
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void __set_PSP(uint32_t topOfProcStack)
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{
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__ASM("msr psp, r0");
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__ASM("bx lr");
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}
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/**
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* @brief Return the Main Stack Pointer
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*
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* @return Main Stack Pointer
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*
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* Return the current value of the MSP (main stack pointer)
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* Cortex processor register
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*/
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uint32_t __get_MSP(void)
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{
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__ASM("mrs r0, msp");
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__ASM("bx lr");
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}
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/**
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* @brief Set the Main Stack Pointer
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*
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* @param topOfMainStack Main Stack Pointer
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*
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* Assign the value mainStackPointer to the MSP
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* (main stack pointer) Cortex processor register
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*/
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void __set_MSP(uint32_t topOfMainStack)
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{
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__ASM("msr msp, r0");
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__ASM("bx lr");
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}
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/**
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* @brief Reverse byte order in unsigned short value
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*
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* @param value value to reverse
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* @return reversed value
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*
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* Reverse byte order in unsigned short value
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*/
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uint32_t __REV16(uint16_t value)
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{
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__ASM("rev16 r0, r0");
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__ASM("bx lr");
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}
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/**
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* @brief Reverse bit order of value
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*
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* @param value value to reverse
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* @return reversed value
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*
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* Reverse bit order of value
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*/
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uint32_t __RBIT(uint32_t value)
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{
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__ASM("rbit r0, r0");
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__ASM("bx lr");
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}
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/**
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* @brief LDR Exclusive (8 bit)
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*
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* @param *addr address pointer
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* @return value of (*address)
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*
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* Exclusive LDR command for 8 bit values)
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*/
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uint8_t __LDREXB(uint8_t *addr)
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{
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__ASM("ldrexb r0, [r0]");
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__ASM("bx lr");
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}
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/**
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* @brief LDR Exclusive (16 bit)
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*
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* @param *addr address pointer
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* @return value of (*address)
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*
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* Exclusive LDR command for 16 bit values
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*/
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uint16_t __LDREXH(uint16_t *addr)
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{
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__ASM("ldrexh r0, [r0]");
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__ASM("bx lr");
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}
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/**
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* @brief LDR Exclusive (32 bit)
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*
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* @param *addr address pointer
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* @return value of (*address)
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*
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* Exclusive LDR command for 32 bit values
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*/
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uint32_t __LDREXW(uint32_t *addr)
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{
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__ASM("ldrex r0, [r0]");
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__ASM("bx lr");
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}
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/**
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* @brief STR Exclusive (8 bit)
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*
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* @param value value to store
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* @param *addr address pointer
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* @return successful / failed
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*
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* Exclusive STR command for 8 bit values
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*/
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uint32_t __STREXB(uint8_t value, uint8_t *addr)
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{
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__ASM("strexb r0, r0, [r1]");
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__ASM("bx lr");
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}
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/**
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* @brief STR Exclusive (16 bit)
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*
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* @param value value to store
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* @param *addr address pointer
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* @return successful / failed
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*
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* Exclusive STR command for 16 bit values
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*/
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uint32_t __STREXH(uint16_t value, uint16_t *addr)
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{
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__ASM("strexh r0, r0, [r1]");
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__ASM("bx lr");
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}
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/**
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* @brief STR Exclusive (32 bit)
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*
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* @param value value to store
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* @param *addr address pointer
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* @return successful / failed
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*
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* Exclusive STR command for 32 bit values
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*/
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uint32_t __STREXW(uint32_t value, uint32_t *addr)
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{
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__ASM("strex r0, r0, [r1]");
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__ASM("bx lr");
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}
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#pragma diag_default=Pe940
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#elif (defined (__GNUC__)) /*------------------ GNU Compiler ---------------------*/
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/* GNU gcc specific functions */
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/**
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* @brief Return the Process Stack Pointer
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*
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* @return ProcessStackPointer
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*
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* Return the actual process stack pointer
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*/
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uint32_t __get_PSP(void) __attribute__((naked));
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uint32_t __get_PSP(void)
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{
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uint32_t result = 0;
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__ASM volatile("MRS %0, psp\n\t"
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"MOV r0, %0 \n\t"
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"BX lr \n\t" : "=r"(result));
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return (result);
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}
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/**
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* @brief Set the Process Stack Pointer
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*
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* @param topOfProcStack Process Stack Pointer
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*
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* Assign the value ProcessStackPointer to the MSP
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* (process stack pointer) Cortex processor register
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*/
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void __set_PSP(uint32_t topOfProcStack) __attribute__((naked));
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void __set_PSP(uint32_t topOfProcStack)
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{
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__ASM volatile("MSR psp, %0\n\t"
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"BX lr \n\t" : : "r"(topOfProcStack));
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}
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/**
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* @brief Return the Main Stack Pointer
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*
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* @return Main Stack Pointer
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*
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* Return the current value of the MSP (main stack pointer)
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* Cortex processor register
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*/
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uint32_t __get_MSP(void) __attribute__((naked));
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uint32_t __get_MSP(void)
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{
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uint32_t result = 0;
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__ASM volatile("MRS %0, msp\n\t"
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"MOV r0, %0 \n\t"
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"BX lr \n\t" : "=r"(result));
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return (result);
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}
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/**
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* @brief Set the Main Stack Pointer
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*
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* @param topOfMainStack Main Stack Pointer
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*
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* Assign the value mainStackPointer to the MSP
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* (main stack pointer) Cortex processor register
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*/
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void __set_MSP(uint32_t topOfMainStack) __attribute__((naked));
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void __set_MSP(uint32_t topOfMainStack)
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{
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__ASM volatile("MSR msp, %0\n\t"
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"BX lr \n\t" : : "r"(topOfMainStack));
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}
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/**
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* @brief Return the Base Priority value
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*
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* @return BasePriority
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*
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* Return the content of the base priority register
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*/
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uint32_t __get_BASEPRI(void)
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{
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uint32_t result = 0;
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__ASM volatile("MRS %0, basepri_max" : "=r"(result));
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return (result);
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}
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/**
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* @brief Set the Base Priority value
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*
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* @param basePri BasePriority
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*
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* Set the base priority register
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*/
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void __set_BASEPRI(uint32_t value)
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{
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__ASM volatile("MSR basepri, %0" : : "r"(value));
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}
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/**
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* @brief Return the Priority Mask value
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*
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* @return PriMask
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*
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* Return state of the priority mask bit from the priority mask register
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*/
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uint32_t __get_PRIMASK(void)
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{
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uint32_t result = 0;
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__ASM volatile("MRS %0, primask" : "=r"(result));
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return (result);
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}
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/**
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* @brief Set the Priority Mask value
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*
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* @param priMask PriMask
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*
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* Set the priority mask bit in the priority mask register
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*/
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void __set_PRIMASK(uint32_t priMask)
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{
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__ASM volatile("MSR primask, %0" : : "r"(priMask));
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}
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/**
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* @brief Return the Fault Mask value
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*
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* @return FaultMask
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*
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* Return the content of the fault mask register
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*/
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uint32_t __get_FAULTMASK(void)
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{
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uint32_t result = 0;
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__ASM volatile("MRS %0, faultmask" : "=r"(result));
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return (result);
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}
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/**
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* @brief Set the Fault Mask value
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*
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* @param faultMask faultMask value
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*
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* Set the fault mask register
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*/
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void __set_FAULTMASK(uint32_t faultMask)
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{
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__ASM volatile("MSR faultmask, %0" : : "r"(faultMask));
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}
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/**
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* @brief Return the Control Register value
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*
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* @return Control value
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*
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* Return the content of the control register
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*/
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uint32_t __get_CONTROL(void)
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{
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uint32_t result = 0;
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__ASM volatile("MRS %0, control" : "=r"(result));
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return (result);
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}
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/**
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* @brief Set the Control Register value
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*
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* @param control Control value
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*
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* Set the control register
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*/
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void __set_CONTROL(uint32_t control)
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{
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__ASM volatile("MSR control, %0" : : "r"(control));
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}
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|
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/**
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* @brief Reverse byte order in integer value
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|
*
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* @param value value to reverse
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* @return reversed value
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*
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* Reverse byte order in integer value
|
|
*/
|
|
uint32_t __REV(uint32_t value)
|
|
{
|
|
uint32_t result = 0;
|
|
|
|
__ASM volatile("rev %0, %1" : "=r"(result) : "r"(value));
|
|
return (result);
|
|
}
|
|
|
|
/**
|
|
* @brief Reverse byte order in unsigned short value
|
|
*
|
|
* @param value value to reverse
|
|
* @return reversed value
|
|
*
|
|
* Reverse byte order in unsigned short value
|
|
*/
|
|
uint32_t __REV16(uint16_t value)
|
|
{
|
|
uint32_t result = 0;
|
|
|
|
__ASM volatile("rev16 %0, %1" : "=r"(result) : "r"(value));
|
|
return (result);
|
|
}
|
|
|
|
/**
|
|
* @brief Reverse byte order in signed short value with sign extension to integer
|
|
*
|
|
* @param value value to reverse
|
|
* @return reversed value
|
|
*
|
|
* Reverse byte order in signed short value with sign extension to integer
|
|
*/
|
|
int32_t __REVSH(int16_t value)
|
|
{
|
|
uint32_t result = 0;
|
|
|
|
__ASM volatile("revsh %0, %1" : "=r"(result) : "r"(value));
|
|
return (result);
|
|
}
|
|
|
|
/**
|
|
* @brief Reverse bit order of value
|
|
*
|
|
* @param value value to reverse
|
|
* @return reversed value
|
|
*
|
|
* Reverse bit order of value
|
|
*/
|
|
uint32_t __RBIT(uint32_t value)
|
|
{
|
|
uint32_t result = 0;
|
|
|
|
__ASM volatile("rbit %0, %1" : "=r"(result) : "r"(value));
|
|
return (result);
|
|
}
|
|
|
|
/**
|
|
* @brief LDR Exclusive (8 bit)
|
|
*
|
|
* @param *addr address pointer
|
|
* @return value of (*address)
|
|
*
|
|
* Exclusive LDR command for 8 bit value
|
|
*/
|
|
uint8_t __LDREXB(uint8_t *addr)
|
|
{
|
|
uint8_t result = 0;
|
|
|
|
__ASM volatile("ldrexb %0, [%1]" : "=r"(result) : "r"(addr));
|
|
return (result);
|
|
}
|
|
|
|
/**
|
|
* @brief LDR Exclusive (16 bit)
|
|
*
|
|
* @param *addr address pointer
|
|
* @return value of (*address)
|
|
*
|
|
* Exclusive LDR command for 16 bit values
|
|
*/
|
|
uint16_t __LDREXH(uint16_t *addr)
|
|
{
|
|
uint16_t result = 0;
|
|
|
|
__ASM volatile("ldrexh %0, [%1]" : "=r"(result) : "r"(addr));
|
|
return (result);
|
|
}
|
|
|
|
/**
|
|
* @brief LDR Exclusive (32 bit)
|
|
*
|
|
* @param *addr address pointer
|
|
* @return value of (*address)
|
|
*
|
|
* Exclusive LDR command for 32 bit values
|
|
*/
|
|
uint32_t __LDREXW(uint32_t *addr)
|
|
{
|
|
uint32_t result = 0;
|
|
|
|
__ASM volatile("ldrex %0, [%1]" : "=r"(result) : "r"(addr));
|
|
return (result);
|
|
}
|
|
|
|
/**
|
|
* @brief STR Exclusive (8 bit)
|
|
*
|
|
* @param value value to store
|
|
* @param *addr address pointer
|
|
* @return successful / failed
|
|
*
|
|
* Exclusive STR command for 8 bit values
|
|
*/
|
|
uint32_t __STREXB(uint8_t value, uint8_t *addr)
|
|
{
|
|
uint32_t result = 0;
|
|
|
|
__ASM volatile("strexb %0, %2, [%1]" : "=r"(result) : "r"(addr), "r"(value));
|
|
return (result);
|
|
}
|
|
|
|
/**
|
|
* @brief STR Exclusive (16 bit)
|
|
*
|
|
* @param value value to store
|
|
* @param *addr address pointer
|
|
* @return successful / failed
|
|
*
|
|
* Exclusive STR command for 16 bit values
|
|
*/
|
|
uint32_t __STREXH(uint16_t value, uint16_t *addr)
|
|
{
|
|
uint32_t result = 0;
|
|
|
|
__ASM volatile("strexh %0, %2, [%1]" : "=r"(result) : "r"(addr), "r"(value));
|
|
return (result);
|
|
}
|
|
|
|
/**
|
|
* @brief STR Exclusive (32 bit)
|
|
*
|
|
* @param value value to store
|
|
* @param *addr address pointer
|
|
* @return successful / failed
|
|
*
|
|
* Exclusive STR command for 32 bit values
|
|
*/
|
|
uint32_t __STREXW(uint32_t value, uint32_t *addr)
|
|
{
|
|
uint32_t result = 0;
|
|
|
|
__ASM volatile("strex %0, %2, [%1]" : "=r"(result) : "r"(addr), "r"(value));
|
|
return (result);
|
|
}
|
|
|
|
|
|
#elif (defined (__TASKING__)) /*------------------ TASKING Compiler ---------------------*/
|
|
/* TASKING carm specific functions */
|
|
|
|
/*
|
|
* The CMSIS functions have been implemented as intrinsics in the compiler.
|
|
* Please use "carm -?i" to get an up to date list of all instrinsics,
|
|
* Including the CMSIS ones.
|
|
*/
|
|
|
|
#endif
|