ARM intrinsics

Description

Various intrinsics.

Mostly reimplemented CMSIS intrinsics for use in kernel code.

Macros
#define	ALWAYS_INLINE   __attribute__((always_inline))

Functions
static ALWAYS_INLINE uint8_t	__LDREXB (uint8_t *addr)
	Intrinsic access to ARM LDREXB instruction.
static ALWAYS_INLINE int	__STREXB (uint8_t *addr, uint8_t value)
	Intrinsic access to ARM STREXB instruction.
static ALWAYS_INLINE void	__CLREX ()
static ALWAYS_INLINE void *	__get_PSP (void)
	Get value of process SP.
static ALWAYS_INLINE void *	__get_LR (void)
	Get value of process LR.
static ALWAYS_INLINE void	__set_PSP (unsigned long *stack_top)
	Set value of process SP.
static ALWAYS_INLINE void	__set_CONTROL (uint32_t control)
static ALWAYS_INLINE void	__DSB ()
static ALWAYS_INLINE void	__ISB ()

Macro Definition Documentation

ALWAYS_INLINE

#define ALWAYS_INLINE   __attribute__((always_inline))

Function Documentation

__CLREX()

static ALWAYS_INLINE void __CLREX ( )

inlinestatic

__DSB()

static ALWAYS_INLINE void __DSB ( )

inlinestatic

__get_LR()

static ALWAYS_INLINE void * __get_LR ( void  )

inlinestatic

Get value of process LR.

Returns

top of application stack

__get_PSP()

static ALWAYS_INLINE void * __get_PSP ( void  )

inlinestatic

Get value of process SP.

Returns

top of application stack

__ISB()

static ALWAYS_INLINE void __ISB ( )

inlinestatic

__LDREXB()

static ALWAYS_INLINE uint8_t __LDREXB ( uint8_t *  addr )

inlinestatic

Intrinsic access to ARM LDREXB instruction.

Parameters

addr	address to load from

Returns

8-bit value read from addr

__set_CONTROL()

static ALWAYS_INLINE void __set_CONTROL ( uint32_t  control )

inlinestatic

__set_PSP()

static ALWAYS_INLINE void __set_PSP ( unsigned long *  stack_top )

inlinestatic

Set value of process SP.

Parameters

stack_top

new top of application stack

__STREXB()

static ALWAYS_INLINE int __STREXB ( uint8_t *  addr, uint8_t  value  )

inlinestatic

Intrinsic access to ARM STREXB instruction.

Parameters

addr	address to store to
value	8-bit value to be stored to addr

Returns

success flag