/****************************************************************************** * @file: core_cm3.c * @purpose: CMSIS Cortex-M3 Core Peripheral Access Layer Source File * @version: V1.20 * @date: 22. May 2009 *---------------------------------------------------------------------------- * * Copyright (C) 2009 ARM Limited. All rights reserved. * * ARM Limited (ARM) is supplying this software for use with Cortex-Mx * processor based microcontrollers. This file can be freely distributed * within development tools that are supporting such ARM based processors. * * THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED * OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. * ARM SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR * CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER. * ******************************************************************************/ #include /* define compiler specific symbols */ #if defined ( __CC_ARM ) #define __ASM __asm /*!< asm keyword for armcc */ #define __INLINE __inline /*!< inline keyword for armcc */ #elif defined ( __ICCARM__ ) #define __ASM __asm /*!< asm keyword for iarcc */ #define __INLINE inline /*!< inline keyword for iarcc. Only avaiable in High optimization mode! */ #elif defined ( __GNUC__ ) #define __ASM __asm /*!< asm keyword for gcc */ #define __INLINE inline /*!< inline keyword for gcc */ #elif defined ( __TASKING__ ) #define __ASM __asm /*!< asm keyword for TASKING Compiler */ #define __INLINE inline /*!< inline keyword for TASKING Compiler */ #endif #if defined ( __CC_ARM ) /*------------------RealView Compiler -----------------*/ /** * @brief Return the Process Stack Pointer * * @param none * @return uint32_t ProcessStackPointer * * Return the actual process stack pointer */ __ASM uint32_t __get_PSP(void) { mrs r0, psp bx lr } /** * @brief Set the Process Stack Pointer * * @param uint32_t Process Stack Pointer * @return none * * Assign the value ProcessStackPointer to the MSP * (process stack pointer) Cortex processor register */ __ASM void __set_PSP(uint32_t topOfProcStack) { msr psp, r0 bx lr } /** * @brief Return the Main Stack Pointer * * @param none * @return uint32_t Main Stack Pointer * * Return the current value of the MSP (main stack pointer) * Cortex processor register */ __ASM uint32_t __get_MSP(void) { mrs r0, msp bx lr } /** * @brief Set the Main Stack Pointer * * @param uint32_t Main Stack Pointer * @return none * * Assign the value mainStackPointer to the MSP * (main stack pointer) Cortex processor register */ __ASM void __set_MSP(uint32_t mainStackPointer) { msr msp, r0 bx lr } /** * @brief Reverse byte order in unsigned short value * * @param uint16_t value to reverse * @return uint32_t reversed value * * Reverse byte order in unsigned short value */ __ASM uint32_t __REV16(uint16_t value) { rev16 r0, r0 bx lr } /** * @brief Reverse byte order in signed short value with sign extension to integer * * @param int16_t value to reverse * @return int32_t reversed value * * Reverse byte order in signed short value with sign extension to integer */ __ASM int32_t __REVSH(int16_t value) { revsh r0, r0 bx lr } #if (__ARMCC_VERSION < 400000) /** * @brief Remove the exclusive lock created by ldrex * * @param none * @return none * * Removes the exclusive lock which is created by ldrex. */ __ASM void __CLREX(void) { clrex } /** * @brief Return the Base Priority value * * @param none * @return uint32_t BasePriority * * Return the content of the base priority register */ __ASM uint32_t __get_BASEPRI(void) { mrs r0, basepri bx lr } /** * @brief Set the Base Priority value * * @param uint32_t BasePriority * @return none * * Set the base priority register */ __ASM void __set_BASEPRI(uint32_t basePri) { msr basepri, r0 bx lr } /** * @brief Return the Priority Mask value * * @param none * @return uint32_t PriMask * * Return the state of the priority mask bit from the priority mask * register */ __ASM uint32_t __get_PRIMASK(void) { mrs r0, primask bx lr } /** * @brief Set the Priority Mask value * * @param uint32_t PriMask * @return none * * Set the priority mask bit in the priority mask register */ __ASM void __set_PRIMASK(uint32_t priMask) { msr primask, r0 bx lr } /** * @brief Return the Fault Mask value * * @param none * @return uint32_t FaultMask * * Return the content of the fault mask register */ __ASM uint32_t __get_FAULTMASK(void) { mrs r0, faultmask bx lr } /** * @brief Set the Fault Mask value * * @param uint32_t faultMask value * @return none * * Set the fault mask register */ __ASM void __set_FAULTMASK(uint32_t faultMask) { msr faultmask, r0 bx lr } /** * @brief Return the Control Register value * * @param none * @return uint32_t Control value * * Return the content of the control register */ __ASM uint32_t __get_CONTROL(void) { mrs r0, control bx lr } /** * @brief Set the Control Register value * * @param uint32_t Control value * @return none * * Set the control register */ __ASM void __set_CONTROL(uint32_t control) { msr control, r0 bx lr } #endif /* __ARMCC_VERSION */ #elif (defined (__ICCARM__)) /*------------------ ICC Compiler -------------------*/ #pragma diag_suppress=Pe940 /** * @brief Return the Process Stack Pointer * * @param none * @return uint32_t ProcessStackPointer * * Return the actual process stack pointer */ uint32_t __get_PSP(void) { __ASM("mrs r0, psp"); __ASM("bx lr"); } /** * @brief Set the Process Stack Pointer * * @param uint32_t Process Stack Pointer * @return none * * Assign the value ProcessStackPointer to the MSP * (process stack pointer) Cortex processor register */ void __set_PSP(uint32_t topOfProcStack) { __ASM("msr psp, r0"); __ASM("bx lr"); } /** * @brief Return the Main Stack Pointer * * @param none * @return uint32_t Main Stack Pointer * * Return the current value of the MSP (main stack pointer) * Cortex processor register */ uint32_t __get_MSP(void) { __ASM("mrs r0, msp"); __ASM("bx lr"); } /** * @brief Set the Main Stack Pointer * * @param uint32_t Main Stack Pointer * @return none * * Assign the value mainStackPointer to the MSP * (main stack pointer) Cortex processor register */ void __set_MSP(uint32_t topOfMainStack) { __ASM("msr msp, r0"); __ASM("bx lr"); } /** * @brief Reverse byte order in unsigned short value * * @param uint16_t value to reverse * @return uint32_t reversed value * * Reverse byte order in unsigned short value */ uint32_t __REV16(uint16_t value) { __ASM("rev16 r0, r0"); __ASM("bx lr"); } /** * @brief Reverse bit order of value * * @param uint32_t value to reverse * @return uint32_t reversed value * * Reverse bit order of value */ uint32_t __RBIT(uint32_t value) { __ASM("rbit r0, r0"); __ASM("bx lr"); } /** * @brief LDR Exclusive * * @param uint8_t* address * @return uint8_t value of (*address) * * Exclusive LDR command */ uint8_t __LDREXB(uint8_t *addr) { __ASM("ldrexb r0, [r0]"); __ASM("bx lr"); } /** * @brief LDR Exclusive * * @param uint16_t* address * @return uint16_t value of (*address) * * Exclusive LDR command */ uint16_t __LDREXH(uint16_t *addr) { __ASM("ldrexh r0, [r0]"); __ASM("bx lr"); } /** * @brief LDR Exclusive * * @param uint32_t* address * @return uint32_t value of (*address) * * Exclusive LDR command */ uint32_t __LDREXW(uint32_t *addr) { __ASM("ldrex r0, [r0]"); __ASM("bx lr"); } /** * @brief STR Exclusive * * @param uint8_t *address * @param uint8_t value to store * @return uint32_t successful / failed * * Exclusive STR command */ uint32_t __STREXB(uint8_t value, uint8_t *addr) { __ASM("strexb r0, r0, [r1]"); __ASM("bx lr"); } /** * @brief STR Exclusive * * @param uint16_t *address * @param uint16_t value to store * @return uint32_t successful / failed * * Exclusive STR command */ uint32_t __STREXH(uint16_t value, uint16_t *addr) { __ASM("strexh r0, r0, [r1]"); __ASM("bx lr"); } /** * @brief STR Exclusive * * @param uint32_t *address * @param uint32_t value to store * @return uint32_t successful / failed * * Exclusive STR command */ uint32_t __STREXW(uint32_t value, uint32_t *addr) { __ASM("strex r0, r0, [r1]"); __ASM("bx lr"); } #pragma diag_default=Pe940 #elif (defined (__GNUC__)) /*------------------ GNU Compiler ---------------------*/ /** * @brief Return the Process Stack Pointer * * @param none * @return uint32_t ProcessStackPointer * * Return the actual process stack pointer */ uint32_t __get_PSP(void) __attribute__( ( naked ) ); uint32_t __get_PSP(void) { uint32_t result=0; __ASM volatile ("MRS %0, psp\n\t" "MOV r0, %0 \n\t" "BX lr \n\t" : "=r" (result) ); return(result); } /** * @brief Set the Process Stack Pointer * * @param uint32_t Process Stack Pointer * @return none * * Assign the value ProcessStackPointer to the MSP * (process stack pointer) Cortex processor register */ void __set_PSP(uint32_t topOfProcStack) __attribute__( ( naked ) ); void __set_PSP(uint32_t topOfProcStack) { __ASM volatile ("MSR psp, %0\n\t" "BX lr \n\t" : : "r" (topOfProcStack) ); } /** * @brief Return the Main Stack Pointer * * @param none * @return uint32_t Main Stack Pointer * * Return the current value of the MSP (main stack pointer) * Cortex processor register */ uint32_t __get_MSP(void) __attribute__( ( naked ) ); uint32_t __get_MSP(void) { uint32_t result=0; __ASM volatile ("MRS %0, msp\n\t" "MOV r0, %0 \n\t" "BX lr \n\t" : "=r" (result) ); return(result); } /** * @brief Set the Main Stack Pointer * * @param uint32_t Main Stack Pointer * @return none * * Assign the value mainStackPointer to the MSP * (main stack pointer) Cortex processor register */ void __set_MSP(uint32_t topOfMainStack) __attribute__( ( naked ) ); void __set_MSP(uint32_t topOfMainStack) { __ASM volatile ("MSR msp, %0\n\t" "BX lr \n\t" : : "r" (topOfMainStack) ); } /** * @brief Return the Base Priority value * * @param none * @return uint32_t BasePriority * * Return the content of the base priority register */ uint32_t __get_BASEPRI(void) { uint32_t result=0; __ASM volatile ("MRS %0, basepri_max" : "=r" (result) ); return(result); } /** * @brief Set the Base Priority value * * @param uint32_t BasePriority * @return none * * Set the base priority register */ void __set_BASEPRI(uint32_t value) { __ASM volatile ("MSR basepri, %0" : : "r" (value) ); } /** * @brief Return the Priority Mask value * * @param none * @return uint32_t PriMask * * Return the state of the priority mask bit from the priority mask * register */ uint32_t __get_PRIMASK(void) { uint32_t result=0; __ASM volatile ("MRS %0, primask" : "=r" (result) ); return(result); } /** * @brief Set the Priority Mask value * * @param uint32_t PriMask * @return none * * Set the priority mask bit in the priority mask register */ void __set_PRIMASK(uint32_t priMask) { __ASM volatile ("MSR primask, %0" : : "r" (priMask) ); } /** * @brief Return the Fault Mask value * * @param none * @return uint32_t FaultMask * * Return the content of the fault mask register */ uint32_t __get_FAULTMASK(void) { uint32_t result=0; __ASM volatile ("MRS %0, faultmask" : "=r" (result) ); return(result); } /** * @brief Set the Fault Mask value * * @param uint32_t faultMask value * @return none * * Set the fault mask register */ void __set_FAULTMASK(uint32_t faultMask) { __ASM volatile ("MSR faultmask, %0" : : "r" (faultMask) ); } /** * @brief Reverse byte order in integer value * * @param uint32_t value to reverse * @return uint32_t reversed value * * 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 uint16_t value to reverse * @return uint32_t 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 int32_t value to reverse * @return int32_t 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 uint32_t value to reverse * @return uint32_t 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 * * @param uint8_t* address * @return uint8_t value of (*address) * * Exclusive LDR command */ uint8_t __LDREXB(uint8_t *addr) { uint8_t result=0; __ASM volatile ("ldrexb %0, [%1]" : "=r" (result) : "r" (addr) ); return(result); } /** * @brief LDR Exclusive * * @param uint16_t* address * @return uint16_t value of (*address) * * Exclusive LDR command */ uint16_t __LDREXH(uint16_t *addr) { uint16_t result=0; __ASM volatile ("ldrexh %0, [%1]" : "=r" (result) : "r" (addr) ); return(result); } /** * @brief LDR Exclusive * * @param uint32_t* address * @return uint32_t value of (*address) * * Exclusive LDR command */ uint32_t __LDREXW(uint32_t *addr) { uint32_t result=0; __ASM volatile ("ldrex %0, [%1]" : "=r" (result) : "r" (addr) ); return(result); } /** * @brief STR Exclusive * * @param uint8_t *address * @param uint8_t value to store * @return uint32_t successful / failed * * Exclusive STR command */ 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 * * @param uint16_t *address * @param uint16_t value to store * @return uint32_t successful / failed * * Exclusive STR command */ 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 * * @param uint32_t *address * @param uint32_t value to store * @return uint32_t successful / failed * * Exclusive STR command */ 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); } /** * @brief Return the Control Register value * * @param none * @return uint32_t Control value * * Return the content of the control register */ uint32_t __get_CONTROL(void) { uint32_t result=0; __ASM volatile ("MRS %0, control" : "=r" (result) ); return(result); } /** * @brief Set the Control Register value * * @param uint32_t Control value * @return none * * Set the control register */ void __set_CONTROL(uint32_t control) { __ASM volatile ("MSR control, %0" : : "r" (control) ); } #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