core_cm3.c

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/**
 * @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