Per-CPU Information

This group contains the implementation of the per-CPU information. More...

Topics
	Flexible Per-CPU Data
	This group contains the implementation to support flexible per-CPU data.

Files
file	cpukit/include/rtems/score/percpu.h
	This header file provides the interfaces of the Per-CPU Information.
file	cpukit/score/src/percpu.c
	This source file contains the uniprocessor definition of _Per_CPU_Information and some static assertions.
file	cpukit/score/src/percpuasm.c
	This source file contains the static assertions for defines used in assembler files.
file	cpukit/score/src/percpujobs.c
	This source file contains the implementation of _Per_CPU_Add_job(), _Per_CPU_Perform_jobs(), _Per_CPU_Submit_job(), and _Per_CPU_Wait_for_job().

Data Structures
struct	Per_CPU_Stats
	Per-CPU statistics. More...
struct	Per_CPU_Control
	Per CPU Core Structure. More...
struct	Per_CPU_Control_envelope
struct	Per_CPU_Control::[struct].Watchdog
	Watchdog state for this processor. More...

Macros
#define	_Per_CPU_Acquire(cpu, lock_context)
#define	_Per_CPU_Release(cpu, lock_context)
#define	_Per_CPU_Get_snapshot()
#define	_Per_CPU_Get()
#define	_Thread_Dispatch_disable_level   _Per_CPU_Get()->thread_dispatch_disable_level
#define	_Thread_Heir   _Per_CPU_Get()->heir
#define	_Thread_Executing   _Per_CPU_Get_executing( _Per_CPU_Get() )
#define	_ISR_Nest_level   _Per_CPU_Get()->isr_nest_level
#define	_CPU_Interrupt_stack_low   _Per_CPU_Get()->interrupt_stack_low
#define	_CPU_Interrupt_stack_high   _Per_CPU_Get()->interrupt_stack_high
#define	_Thread_Dispatch_necessary   _Per_CPU_Get()->dispatch_necessary

Typedefs
typedef struct Per_CPU_Control	Per_CPU_Control
	Per CPU Core Structure.

Enumerations
enum	Per_CPU_Watchdog_index { PER_CPU_WATCHDOG_TICKS , PER_CPU_WATCHDOG_REALTIME , PER_CPU_WATCHDOG_MONOTONIC , PER_CPU_WATCHDOG_COUNT }
	Per-CPU watchdog header index. More...

Variables
CPU_STRUCTURE_ALIGNMENT Per_CPU_Control_envelope	_Per_CPU_Information []
	Set of Per CPU Core Information.

Detailed Description

This group contains the implementation of the per-CPU information.

The per-CPU information encapsulates state which is maintained for each configured processor in the system. There will be one instance of a Per_CPU_Control in the _Per_CPU_Information table for each configured processor in the system.

Macro Definition Documentation

_Per_CPU_Acquire

#define _Per_CPU_Acquire	(		cpu,
			lock_context )

Value:

_ISR_lock_Acquire( &( cpu )->Lock, lock_context )

_Per_CPU_Get

#define _Per_CPU_Get

(

)

Value:

_Per_CPU_Get_snapshot()

_Per_CPU_Get_snapshot

#define _Per_CPU_Get_snapshot

(

)

Value:

( &_Per_CPU_Information[ _SMP_Get_current_processor() ].per_cpu )

_Per_CPU_Release

#define _Per_CPU_Release	(		cpu,
			lock_context )

Value:

_ISR_lock_Release( &( cpu )->Lock, lock_context )

Typedef Documentation

Per_CPU_Control

typedef struct Per_CPU_Control Per_CPU_Control

Per CPU Core Structure.

This structure is used to hold per core state information.

Enumeration Type Documentation

Per_CPU_Watchdog_index

enum Per_CPU_Watchdog_index

Per-CPU watchdog header index.

Enumerator
PER_CPU_WATCHDOG_TICKS	Index for tick clock per-CPU watchdog header. The reference time point for the tick clock is the system start. The clock resolution is one system clock tick. It is used for the system clock tick based time services.
PER_CPU_WATCHDOG_REALTIME	Index for realtime clock per-CPU watchdog header. The reference time point for the realtime clock is the POSIX Epoch. The clock resolution is one nanosecond. It is used for the time of day services and the POSIX services using CLOCK_REALTIME.
PER_CPU_WATCHDOG_MONOTONIC	Index for monotonic clock per-CPU watchdog header. The reference time point for the monotonic clock is the system start. The clock resolution is one nanosecond. It is used for the POSIX services using CLOCK_MONOTONIC.
PER_CPU_WATCHDOG_COUNT	Count of per-CPU watchdog headers.

Variable Documentation

_Per_CPU_Information

CPU_STRUCTURE_ALIGNMENT Per_CPU_Control_envelope _Per_CPU_Information[]

extern

Set of Per CPU Core Information.

This is an array of per CPU core information.