ARM

ARM Architecture Support. More...

Modules
	ARM Assembler Support
	ARM Assembler Support.
	ARM Co-Processor 15 Support
	ARM co-processor 15 (CP15) support.
	ARM Paravirtualization Support

Files
file	cpu.c
	ARM architecture support implementation.
file	cpu_asm.h
	ARM Assembler Support API.

Data Structures
struct	Context_Control
	Thread register context. More...
struct	ARM_VFP_context
struct	CPU_Exception_frame
	The set of registers that specifies the complete processor state. More...

Macros
#define	CPU_MODEL_NAME   "ARMv4"
#define	ARM_MULTILIB_ARCH_V4
#define	CPU_NAME   "ARM"
#define	CPU_SIMPLE_VECTORED_INTERRUPTS   FALSE
#define	CPU_ISR_PASSES_FRAME_POINTER   FALSE
#define	CPU_HARDWARE_FP   FALSE
#define	CPU_SOFTWARE_FP   FALSE
#define	CPU_ALL_TASKS_ARE_FP   FALSE
#define	CPU_IDLE_TASK_IS_FP   FALSE
#define	CPU_USE_DEFERRED_FP_SWITCH   FALSE
#define	CPU_ENABLE_ROBUST_THREAD_DISPATCH   TRUE
#define	CPU_STACK_GROWS_UP   FALSE
#define	CPU_CACHE_LINE_BYTES   32
#define	CPU_STRUCTURE_ALIGNMENT   RTEMS_ALIGNED( CPU_CACHE_LINE_BYTES )
#define	CPU_MODES_INTERRUPT_MASK   0x1
#define	CPU_MPCI_RECEIVE_SERVER_EXTRA_STACK   0
#define	CPU_PROVIDES_ISR_IS_IN_PROGRESS   FALSE
#define	CPU_STACK_MINIMUM_SIZE   (1024 * 4)
#define	CPU_SIZEOF_POINTER   4
#define	CPU_ALIGNMENT   8
#define	CPU_HEAP_ALIGNMENT   CPU_ALIGNMENT
#define	CPU_STACK_ALIGNMENT   8
#define	CPU_INTERRUPT_STACK_ALIGNMENT   CPU_CACHE_LINE_BYTES
#define	CPU_USE_GENERIC_BITFIELD_CODE   TRUE
#define	CPU_MAXIMUM_PROCESSORS   32
#define	ARM_EXCEPTION_FRAME_SIZE   80
#define	ARM_EXCEPTION_FRAME_REGISTER_SP_OFFSET   52
#define	ARM_EXCEPTION_FRAME_VFP_CONTEXT_OFFSET   72
#define	ARM_VFP_CONTEXT_SIZE   264
#define	_CPU_ISR_Disable(_isr_cookie)
#define	_CPU_ISR_Enable(_isr_cookie)    arm_interrupt_enable( _isr_cookie )
#define	_CPU_ISR_Flash(_isr_cookie)    arm_interrupt_flash( _isr_cookie )
#define	_CPU_Context_Get_SP(_context)    (_context)->register_sp
#define	_CPU_Context_Restart_self(_the_context)    _CPU_Context_restore( (_the_context) );
#define	_CPU_Context_Initialize_fp(_destination)
#define	_CPU_Fatal_halt(_source, _err)
#define	CPU_PER_CPU_CONTROL_SIZE   0

Typedefs
typedef void(*	CPU_ISR_handler) (void)
typedef uint32_t	CPU_Counter_ticks
typedef uintptr_t	CPU_Uint32ptr

Functions
RTEMS_INLINE_ROUTINE bool	_CPU_ISR_Is_enabled (uint32_t level)
void	_CPU_ISR_Set_level (uint32_t level)
	Sets the hardware interrupt level by the level value. More...
uint32_t	_CPU_ISR_Get_level (void)
void	_CPU_Context_Initialize (Context_Control *the_context, void *stack_area_begin, size_t stack_area_size, uint32_t new_level, void(*entry_point)(void), bool is_fp, void *tls_area)
void	_CPU_Initialize (void)
	CPU initialization. More...
void	_CPU_ISR_install_vector (uint32_t vector, CPU_ISR_handler new_handler, CPU_ISR_handler *old_handler)
void	_CPU_Context_switch (Context_Control *run, Context_Control *heir)
	CPU switch context.
void	_CPU_Context_restore (Context_Control *new_context) RTEMS_NO_RETURN
uint32_t	_CPU_Counter_frequency (void)
CPU_Counter_ticks	_CPU_Counter_read (void)
void *	_CPU_Thread_Idle_body (uintptr_t ignored)
void	_CPU_Exception_frame_print (const CPU_Exception_frame *frame)
void	_ARM_Exception_default (CPU_Exception_frame *frame)
void	_CPU_Context_volatile_clobber (uintptr_t pattern)
void	_CPU_Context_validate (uintptr_t pattern)
RTEMS_INLINE_ROUTINE void	_CPU_Instruction_illegal (void)
RTEMS_INLINE_ROUTINE void	_CPU_Instruction_no_operation (void)

Detailed Description

ARM Architecture Support.

Macro Definition Documentation

_CPU_Context_Initialize_fp

#define _CPU_Context_Initialize_fp

(

_destination

)

Value:

  do { \
    *(*(_destination)) = _CPU_Null_fp_context; \
  } while (0)

_CPU_Fatal_halt

#define _CPU_Fatal_halt	(		_source,
			_err
	)

Value:

   do {                                     \
     uint32_t _level;                       \
     uint32_t _error = _err;                \
     _CPU_ISR_Disable( _level );            \
     (void) _level;                         \
     __asm__ volatile ("mov r0, %0\n"       \
                   : "=r" (_error)          \
                   : "0" (_error)           \
                   : "r0" );                \
     while (1);                             \
   } while (0);

_CPU_ISR_Disable

#define _CPU_ISR_Disable

(

_isr_cookie

)

Value:

  do { \
    _isr_cookie = arm_interrupt_disable(); \
  } while (0)

Typedef Documentation

CPU_Uint32ptr

typedef uintptr_t CPU_Uint32ptr

Type that can store a 32-bit integer or a pointer.

Function Documentation

_CPU_Initialize()

void _CPU_Initialize

(

void

)

CPU initialization.

CPU initialization.

_CPU_ISR_Set_level()

void _CPU_ISR_Set_level

(

uint32_t

level

)

Sets the hardware interrupt level by the level value.

Parameters

[in]

level

for or1k can only range over two values: 0 (enable interrupts) and 1 (disable interrupts). In future implementations if fast context switch is implemented, the level can range from 0 to 15.

See also

OpenRISC architecture manual.