core_cm3.h

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 *
 * Return the current value of the MSP (main stack pointer)
 * Cortex processor register
 */
extern uint32_t __get_MSP(void);

/**
 * @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
 */
extern void __set_MSP(uint32_t topOfMainStack);

/**
 * @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
 */
extern uint32_t __REV16(uint16_t value);

/**
 * @brief  Reverse bit order of value
 *
 * @param  uint32_t value to reverse
 * @return uint32_t reversed value
 *
 * Reverse bit order of value
 */
extern uint32_t __RBIT(uint32_t value);

/**
 * @brief  LDR Exclusive
 *
 * @param  uint8_t* address
 * @return uint8_t value of (*address)
 *
 * Exclusive LDR command
 */
extern uint8_t __LDREXB(uint8_t *addr);

/**
 * @brief  LDR Exclusive
 *
 * @param  uint16_t* address
 * @return uint16_t value of (*address)
 *
 * Exclusive LDR command
 */
extern uint16_t __LDREXH(uint16_t *addr);

/**
 * @brief  LDR Exclusive
 *
 * @param  uint32_t* address
 * @return uint32_t value of (*address)
 *
 * Exclusive LDR command
 */
extern uint32_t __LDREXW(uint32_t *addr);

/**
 * @brief  STR Exclusive
 *
 * @param  uint8_t *address
 * @param  uint8_t value to store
 * @return uint32_t successful / failed
 *
 * Exclusive STR command
 */
extern uint32_t __STREXB(uint8_t value, uint8_t *addr);

/**
 * @brief  STR Exclusive
 *
 * @param  uint16_t *address
 * @param  uint16_t value to store
 * @return uint32_t successful / failed
 *
 * Exclusive STR command
 */
extern uint32_t __STREXH(uint16_t value, uint16_t *addr);

/**
 * @brief  STR Exclusive
 *
 * @param  uint32_t *address
 * @param  uint32_t value to store
 * @return uint32_t successful / failed
 *
 * Exclusive STR command
 */
extern uint32_t __STREXW(uint32_t value, uint32_t *addr);



#elif (defined (__GNUC__)) /*------------------ GNU Compiler ---------------------*/
/* GNU gcc specific functions */

static __INLINE void __enable_irq()               { __ASM volatile ("cpsie i"); }
static __INLINE void __disable_irq()              { __ASM volatile ("cpsid i"); }

static __INLINE void __enable_fault_irq()         { __ASM volatile ("cpsie f"); }
static __INLINE void __disable_fault_irq()        { __ASM volatile ("cpsid f"); }

static __INLINE void __NOP()                      { __ASM volatile ("nop"); }
static __INLINE void __WFI()                      { __ASM volatile ("wfi"); }
static __INLINE void __WFE()                      { __ASM volatile ("wfe"); }
static __INLINE void __SEV()                      { __ASM volatile ("sev"); }
static __INLINE void __ISB()                      { __ASM volatile ("isb"); }
static __INLINE void __DSB()                      { __ASM volatile ("dsb"); }
static __INLINE void __DMB()                      { __ASM volatile ("dmb"); }
static __INLINE void __CLREX()                    { __ASM volatile ("clrex"); }


/**
 * @brief  Return the Process Stack Pointer
 *
 * @param  none
 * @return uint32_t ProcessStackPointer
 *
 * Return the actual process stack pointer
 */
extern uint32_t __get_PSP(void);

/**
 * @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
 */
extern void __set_PSP(uint32_t 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
 */
extern uint32_t __get_MSP(void);

/**
 * @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
 */
extern void __set_MSP(uint32_t topOfMainStack);

/**
 * @brief  Return the Base Priority value
 *
 * @param  none
 * @return uint32_t BasePriority
 *
 * Return the content of the base priority register
 */
extern uint32_t __get_BASEPRI(void);

/**
 * @brief  Set the Base Priority value
 *
 * @param  uint32_t BasePriority
 * @return none
 *
 * Set the base priority register
 */
extern void __set_BASEPRI(uint32_t basePri);

/**
 * @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
 */
extern uint32_t  __get_PRIMASK(void);

/**
 * @brief  Set the Priority Mask value
 *
 * @param  uint32_t PriMask
 * @return none
 *
 * Set the priority mask bit in the priority mask register
 */
extern void __set_PRIMASK(uint32_t priMask);

/**
 * @brief  Return the Fault Mask value
 *
 * @param  none
 * @return uint32_t FaultMask
 *
 * Return the content of the fault mask register
 */
extern uint32_t __get_FAULTMASK(void);

/**
 * @brief  Set the Fault Mask value
 *
 * @param  uint32_t faultMask value
 * @return none
 *
 * Set the fault mask register
 */
extern void __set_FAULTMASK(uint32_t faultMask);

/**
 * @brief  Return the Control Register value
* 
*  @param  none
*  @return uint32_t Control value
 *
 * Return the content of the control register
 */
extern uint32_t __get_CONTROL(void);

/**
 * @brief  Set the Control Register value
 *
 * @param  uint32_t Control value
 * @return none
 *
 * Set the control register
 */
extern void __set_CONTROL(uint32_t control);

/**
 * @brief  Reverse byte order in integer value
 *
 * @param  uint32_t value to reverse
 * @return uint32_t reversed value
 *
 * Reverse byte order in integer value
 */
extern uint32_t __REV(uint32_t value);

/**
 * @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
 */
extern uint32_t __REV16(uint16_t value);

/*
 * Reverse byte order in signed short value with sign extension to integer
 *
 * @param  int16_t value to reverse
 * @return int32_t reversed value
 *
 * @brief  Reverse byte order in signed short value with sign extension to integer
 */
extern int32_t __REVSH(int16_t value);

/**
 * @brief  Reverse bit order of value
 *
 * @param  uint32_t value to reverse
 * @return uint32_t reversed value
 *
 * Reverse bit order of value
 */
extern uint32_t __RBIT(uint32_t value);

/**
 * @brief  LDR Exclusive
 *
 * @param  uint8_t* address
 * @return uint8_t value of (*address)
 *
 * Exclusive LDR command
 */
extern uint8_t __LDREXB(uint8_t *addr);

/**
 * @brief  LDR Exclusive
 *
 * @param  uint16_t* address
 * @return uint16_t value of (*address)
 *
 * Exclusive LDR command
 */
extern uint16_t __LDREXH(uint16_t *addr);

/**
 * @brief  LDR Exclusive
 *
 * @param  uint32_t* address
 * @return uint32_t value of (*address)
 *
 * Exclusive LDR command
 */
extern uint32_t __LDREXW(uint32_t *addr);

/**
 * @brief  STR Exclusive
 *
 * @param  uint8_t *address
 * @param  uint8_t value to store
 * @return uint32_t successful / failed
 *
 * Exclusive STR command
 */
extern uint32_t __STREXB(uint8_t value, uint8_t *addr);

/**
 * @brief  STR Exclusive
 *
 * @param  uint16_t *address
 * @param  uint16_t value to store
 * @return uint32_t successful / failed
 *
 * Exclusive STR command
 */
extern uint32_t __STREXH(uint16_t value, uint16_t *addr);

/**
 * @brief  STR Exclusive
 *
 * @param  uint32_t *address
 * @param  uint32_t value to store