【Cortex-M3 CMSIS内核驱动文件详解】3：不同编译器特定的内部函数

三、不同编译器特定的内部函数

3.1 RealView/ARM Compiler

#if defined ( __CC_ARM   ) /*------------------RealView Compiler -----------------*/
/* ARM armcc specific functions */

#define __enable_fault_irq                __enable_fiq
#define __disable_fault_irq               __disable_fiq

#define __NOP                             __nop
#define __WFI                             __wfi
#define __WFE                             __wfe
#define __SEV                             __sev
#define __ISB()                           __isb(0)
#define __DSB()                           __dsb(0)
#define __DMB()                           __dmb(0)
#define __REV                             __rev
#define __RBIT                            __rbit
#define __LDREXB(ptr)                     ((unsigned char ) __ldrex(ptr))
#define __LDREXH(ptr)                     ((unsigned short) __ldrex(ptr))
#define __LDREXW(ptr)                     ((unsigned int  ) __ldrex(ptr))
#define __STREXB(value, ptr)              __strex(value, ptr)
#define __STREXH(value, ptr)              __strex(value, ptr)
#define __STREXW(value, ptr)              __strex(value, ptr)

3.1.1 获取进程栈指针

/**
 * @brief  Return the Process Stack Pointer
 *
 * @return ProcessStackPointer
 *
 * Return the actual process stack pointer
 */
__ASM uint32_t __get_PSP(void)
{
   
  mrs r0, psp
  bx lr
}

3.1.2 设置进程栈指针

/**
 * @brief  Set the Process Stack Pointer
 *
 * @param  topOfProcStack  Process Stack Pointer
 *
 * 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
}

3.1.3 获取主栈指针

/**
 * @brief  Return the Main Stack Pointer
 *
 * @return 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
}

3.1.4 设置主栈指针

/**
 * @brief  Set the Main Stack Pointer
 *
 * @param  topOfMainStack  Main Stack Pointer
 *
 * 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
}

3.1.5 反转无符号短值中的字节顺序

/**
 * @brief  Reverse byte order in unsigned short value
 *
 * @param   value  value to reverse
 * @return         reversed value
 *
 * Reverse byte order in unsigned short value
 */
__ASM uint32_t __REV16(uint16_t value)
{
   
  rev16 r0, r0
  bx lr
}

3.1.6 反转有符号短值中的字节顺序，并将符号扩展为整数

/**
 * @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
 */
__ASM int32_t __REVSH(int16_t value)
{
   
  revsh r0, r0
  bx lr
}

3.1.7 删除ldrex创建的排它锁

/**
 * @brief  Remove the exclusive lock created by ldrex
 *
 * Removes the exclusive lock which is created by ldrex.
 */
__ASM void __CLREX(void)
{
   
  clrex
}

3.1.8 获取BASEPRI

/**
 * @brief  Return the Base Priority value
 *
 * @return BasePriority
 *
 * Return the content of the base priority register
 */
__ASM uint32_t  __get_BASEPRI(void)
{
   
  mrs r0, basepri
  bx lr
}

3.1.9 设置BASEPRI

/**
 * @brief  Set the Base Priority value
 *
 * @param  basePri  BasePriority
 *
 * Set the base priority register
 */
__ASM void __set_BASEPRI(uint32_t basePri)
{
   
  msr basepri, r0
  bx lr
}

3.1.10 获取PRIMASK

/**
 * @brief  Return the Priority Mask value
 *
 * @return PriMask
 *
 * Return state of the priority mask bit from the priority mask register
 */
__ASM uint32_t __get_PRIMASK(void)
{
   
  mrs r0, primask
  bx lr
}

3.1.11 设置PRIMASK

/**
 * @brief  Set the Priority Mask value
 *
 * @param  priMask  PriMask
 *
 * Set the priority mask bit in the priority mask register
 */
__ASM void __set_PRIMASK(uint32_t priMask)
{
   
  msr primask, r0
  bx lr
}

3.1.12 获取FAULTMASK

/**
 * @brief  Return the Fault Mask value
 *
 * @return FaultMask
 *
 * Return the content of the fault mask register
 */
__ASM uint32_t  __get_FAULTMASK(void)
{
   
  mrs r0, faultmask
  bx lr
}

3.1.13 设置FAULTMASK

/**
 * @brief  Set the Fault Mask value
 *
 * @param  faultMask  faultMask value
 *
 * Set the fault mask register
 */
__ASM