i386 specific support. More...

Data Structures
struct	Context_Control
	Thread register context. More...

struct	Context_Control_fp
	SPARC basic context. More...

struct	CPU_Exception_frame
	The set of registers that specifies the complete processor state. More...

struct	CPU_Interrupt_frame
	Interrupt stack frame (ISF). More...

Macros
#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 TRUE

#define	CPU_ENABLE_ROBUST_THREAD_DISPATCH FALSE

#define	CPU_STACK_GROWS_UP FALSE

#define	CPU_CACHE_LINE_BYTES 64

#define	CPU_STRUCTURE_ALIGNMENT

#define	CPU_MAXIMUM_PROCESSORS 32

#define	I386_CONTEXT_CONTROL_EFLAGS_OFFSET 0

#define	I386_CONTEXT_CONTROL_ESP_OFFSET 4

#define	I386_CONTEXT_CONTROL_EBP_OFFSET 8

#define	I386_CONTEXT_CONTROL_EBX_OFFSET 12

#define	I386_CONTEXT_CONTROL_ESI_OFFSET 16

#define	I386_CONTEXT_CONTROL_EDI_OFFSET 20

#define	I386_CONTEXT_CONTROL_GS_0_OFFSET 24

#define	I386_CONTEXT_CONTROL_GS_1_OFFSET 28

#define	_CPU_Context_Get_SP(_context) (_context)->esp

#define	CPU_CONTEXT_FP_SIZE sizeof( Context_Control_fp )

#define	CPU_MODES_INTERRUPT_MASK 0x00000001 /* interrupt level in mode */

#define	CPU_MPCI_RECEIVE_SERVER_EXTRA_STACK 1024

#define	CPU_PROVIDES_ISR_IS_IN_PROGRESS FALSE

#define	CPU_STACK_MINIMUM_SIZE 4096

#define	CPU_SIZEOF_POINTER 4

#define	CPU_ALIGNMENT 4

#define	CPU_HEAP_ALIGNMENT CPU_ALIGNMENT

#define	CPU_STACK_ALIGNMENT 16

#define	CPU_INTERRUPT_STACK_ALIGNMENT CPU_CACHE_LINE_BYTES

#define	_CPU_ISR_Disable(_level) i386_disable_interrupts( _level )

#define	_CPU_ISR_Enable(_level) i386_enable_interrupts( _level )

#define	_CPU_ISR_Flash(_level) i386_flash_interrupts( _level )

#define	_CPU_ISR_Set_level(_new_level)

#define	_CPU_Interrupt_stack_setup(_lo, _hi)

#define	CPU_EFLAGS_INTERRUPTS_ON 0x00003202

#define	CPU_EFLAGS_INTERRUPTS_OFF 0x00003002

#define	_CPU_Context_Restart_self(_the_context) _CPU_Context_restore( (_the_context) );

#define	_CPU_Context_Initialize_fp(_fp_area)

#define	CPU_USE_GENERIC_BITFIELD_CODE FALSE

#define	_CPU_Bitfield_Find_first_bit(_value, _output)

#define	_CPU_Priority_Mask(_bit_number) ( 1 << (_bit_number) )

#define	_CPU_Priority_bits_index(_priority) (_priority)

Typedefs
typedef void(*	cpuExcHandlerType) (CPU_Exception_frame *)

typedef void(*	CPU_ISR_handler) (void)

typedef uint32_t	CPU_Counter_ticks

Enumerations
enum	Intel_symbolic_exception_name { I386_EXCEPTION_DIVIDE_BY_ZERO = 0, I386_EXCEPTION_DEBUG = 1, I386_EXCEPTION_NMI = 2, I386_EXCEPTION_BREAKPOINT = 3, I386_EXCEPTION_OVERFLOW = 4, I386_EXCEPTION_BOUND = 5, I386_EXCEPTION_ILLEGAL_INSTR = 6, I386_EXCEPTION_MATH_COPROC_UNAVAIL = 7, I386_EXCEPTION_DOUBLE_FAULT = 8, I386_EXCEPTION_I386_COPROC_SEG_ERR = 9, I386_EXCEPTION_INVALID_TSS = 10, I386_EXCEPTION_SEGMENT_NOT_PRESENT = 11, I386_EXCEPTION_STACK_SEGMENT_FAULT = 12, I386_EXCEPTION_GENERAL_PROT_ERR = 13, I386_EXCEPTION_PAGE_FAULT = 14, I386_EXCEPTION_INTEL_RES15 = 15, I386_EXCEPTION_FLOAT_ERROR = 16, I386_EXCEPTION_ALIGN_CHECK = 17, I386_EXCEPTION_MACHINE_CHECK = 18, I386_EXCEPTION_ENTER_RDBG = 50 }

Functions
void	rtems_exception_init_mngt (void)

RTEMS_INLINE_ROUTINE bool	_CPU_ISR_Is_enabled (uint32_t level)

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)
	Initializes the CPU context. More...

void	_CPU_Fatal_halt (uint32_t source, uint32_t error) RTEMS_NO_RETURN

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_Thread_Idle_body (uintptr_t ignored)

void	_CPU_Context_switch (Context_Control run, Context_Control heir)
	CPU switch context. More...

void	_CPU_Context_restore (Context_Control *new_context) RTEMS_NO_RETURN

void	_CPU_Context_save_fp (Context_Control_fp **fp_context_ptr)

void	_CPU_Context_restore_fp (Context_Control_fp **fp_context_ptr)

void	_CPU_Exception_frame_print (const CPU_Exception_frame *frame)
	Prints the exception frame via printk(). More...

uint32_t	_CPU_Counter_frequency (void)

CPU_Counter_ticks	_CPU_Counter_read (void)

Variables
cpuExcHandlerType	_currentExcHandler

Context_Control_fp	_CPU_Null_fp_context

Detailed Description

i386 specific support.

Macro Definition Documentation

◆ _CPU_Bitfield_Find_first_bit

#define _CPU_Bitfield_Find_first_bit	(	_value,
		_output
	)

Value:

{ \
    uint16_t __value_in_register = ( _value ); \
    uint16_t __output = 0; \
    __asm__ volatile ( "bsfw    %0,%1 " \
                    : "=r" ( __value_in_register ), "=r" ( __output ) \
                    : "0"  ( __value_in_register ), "1"  ( __output ) \
    ); \
    ( _output ) = __output; \
  }

◆ _CPU_Context_Initialize_fp

#define _CPU_Context_Initialize_fp ( _fp_area )

Value:

{ \
    memcpy( *_fp_area, &_CPU_Null_fp_context, CPU_CONTEXT_FP_SIZE ); \
  }

◆ _CPU_Interrupt_stack_setup

#define _CPU_Interrupt_stack_setup	(	_lo,
		_hi
	)

Value:

do {                                        \
        _hi = (void*)(((uintptr_t)(_hi) - 4) & ~ (CPU_STACK_ALIGNMENT - 1)); \
    } while (0)

◆ _CPU_ISR_Set_level

#define _CPU_ISR_Set_level ( _new_level )

Value:

{ \
    if ( _new_level ) __asm__ volatile ( "cli" ); \
    else              __asm__ volatile ( "sti" ); \
  }

Function Documentation

◆ _CPU_Context_Initialize()

void _CPU_Context_Initialize	(	Context_Control *	the_context,
		void *	stack_area_begin,
		size_t	stack_area_size,
		uint32_t	new_level,
		void(*)(void)	entry_point,
		bool	is_fp,
		void *	tls_area
	)

Initializes the CPU context.

The following steps are performed:

setting a starting address
preparing the stack
preparing the stack and frame pointers
setting the proper interrupt level in the context

Parameters

[in]	context	points to the context area
[in]	stack_area_begin	is the low address of the allocated stack area
[in]	stack_area_size	is the size of the stack area in bytes
[in]	new_level	is the interrupt level for the task
[in]	entry_point	is the task's entry point
[in]	is_fp	is set to `true` if the task is a floating point task
[in]	tls_area	is the thread-local storage (TLS) area

◆ _CPU_Context_restore()

void _CPU_Context_restore ( Context_Control * new_context )

This routine is generally used only to restart self in an efficient manner. It may simply be a label in _CPU_Context_switch.

Parameters

[in] new_context points to the context to be restored.

Note: May be unnecessary to reload some registers.

Port Specific Information:

XXX document implementation including references if appropriate

◆ _CPU_Context_restore_fp()

void _CPU_Context_restore_fp ( Context_Control_fp ** fp_context_ptr )

This routine restores the floating point context passed to it.

Parameters

[in] fp_context_ptr is a pointer to a pointer to a floating point context area to restore

Returns: on output *fp_context_ptr will contain the address that should be used with _CPU_Context_save_fp to save this context.

Port Specific Information:

XXX document implementation including references if appropriate

◆ _CPU_Context_save_fp()

void _CPU_Context_save_fp ( Context_Control_fp ** fp_context_ptr )

This routine saves the floating point context passed to it.

Parameters

[in] fp_context_ptr is a pointer to a pointer to a floating point context area

Returns: on output *fp_context_ptr will contain the address that should be used with _CPU_Context_restore_fp to restore this context.

Port Specific Information:

XXX document implementation including references if appropriate

◆ _CPU_Context_switch()

void _CPU_Context_switch	(	Context_Control *	run,
		Context_Control *	heir
	)

CPU switch context.

This routine switches from the run context to the heir context.

Parameters

[in]	run	points to the context of the currently executing task
[in]	heir	points to the context of the heir task

Port Specific Information:

XXX document implementation including references if appropriate

◆ _CPU_Exception_frame_print()

void _CPU_Exception_frame_print ( const CPU_Exception_frame * frame )

Prints the exception frame via printk().

See also: rtems_fatal() and RTEMS_FATAL_SOURCE_EXCEPTION.

◆ _CPU_Fatal_halt()

void _CPU_Fatal_halt	(	uint32_t	source,
		uint32_t	error
	)

The license and distribution terms for this file may be found in the file LICENSE in this distribution or at http://www.rtems.org/license/LICENSE.

◆ _CPU_Initialize()

void _CPU_Initialize ( void )

CPU initialization.

CPU initialize. This routine performs CPU dependent initialization.

CPU initialization.

◆ _CPU_ISR_Get_level()

uint32_t _CPU_ISR_Get_level ( void )

Return the current interrupt disable level for this task in the format used by the interrupt level portion of the task mode.

Note: This routine usually must be implemented as a subroutine.

Port Specific Information:

XXX document implementation including references if appropriate

Data Structures

Macros

Typedefs

Enumerations

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ _CPU_Bitfield_Find_first_bit

◆ _CPU_Context_Initialize_fp

◆ _CPU_Interrupt_stack_setup

◆ _CPU_ISR_Set_level

Function Documentation

◆ _CPU_Context_Initialize()

◆ _CPU_Context_restore()

◆ _CPU_Context_restore_fp()

◆ _CPU_Context_save_fp()

◆ _CPU_Context_switch()

◆ _CPU_Exception_frame_print()

◆ _CPU_Fatal_halt()

◆ _CPU_Initialize()

◆ _CPU_ISR_Get_level()