456 lines
10 KiB
C
456 lines
10 KiB
C
/**************************************************************************//**
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* @file core_cm0.c
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* @brief CMSIS Cortex-M0 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 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 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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#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 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 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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* @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
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*/
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uint32_t __REV(uint32_t value)
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{
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uint32_t result=0;
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__ASM volatile ("rev %0, %1" : "=r" (result) : "r" (value) );
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return(result);
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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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uint32_t result=0;
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__ASM volatile ("rev16 %0, %1" : "=r" (result) : "r" (value) );
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return(result);
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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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int32_t __REVSH(int16_t value)
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{
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uint32_t result=0;
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__ASM volatile ("revsh %0, %1" : "=r" (result) : "r" (value) );
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return(result);
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}
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#elif (defined (__TASKING__)) /*------------------ TASKING Compiler ---------------------*/
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/* TASKING carm specific functions */
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/*
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* The CMSIS functions have been implemented as intrinsics in the compiler.
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* Please use "carm -?i" to get an up to date list of all instrinsics,
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* Including the CMSIS ones.
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*/
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#endif
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