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/**
* @file rtems/rtems/modes.h
*
* This include file contains all constants and structures associated
* with the RTEMS thread and RTEMS_ASR modes.
*/
/* COPYRIGHT (c) 1989-2008.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#ifndef _RTEMS_RTEMS_MODES_H
#define _RTEMS_RTEMS_MODES_H
/**
* @defgroup ClassicModes Modes
*
* @ingroup ClassicRTEMS
*
* This encapsulates functionality which XXX
*/
/**@{*/
#ifdef __cplusplus
extern "C" {
#endif
#include <rtems/score/isr.h>
/**
* The following type defines the control block used to manage
* each a mode set.
*/
typedef uint32_t Modes_Control;
/**
* The following constants define the individual modes and masks
* which may be used to compose a mode set and to alter modes.
*/
#define RTEMS_ALL_MODE_MASKS 0x0000ffff
/**
* This mode constant is the default mode set.
*/
#define RTEMS_DEFAULT_MODES 0x00000000
/**
* This mode constant is used when the user wishes to obtain their
* current execution mode.
*/
#define RTEMS_CURRENT_MODE 0
/** This mode constant corresponds to the timeslice enable/disable bit. */
#define RTEMS_TIMESLICE_MASK 0x00000200
/** This mode constant corresponds to the preemption enable/disable bit. */
#define RTEMS_PREEMPT_MASK 0x00000100
/** This mode constant corresponds to the signal enable/disable bit. */
#define RTEMS_ASR_MASK 0x00000400
/** This mode constant corresponds to the interrupt enable/disable bits. */
#define RTEMS_INTERRUPT_MASK CPU_MODES_INTERRUPT_MASK
/** This mode constant is used to indicate preemption is enabled. */
#define RTEMS_PREEMPT 0x00000000
/** This mode constant is used to indicate preemption is disabled. */
#define RTEMS_NO_PREEMPT 0x00000100
/** This mode constant is used to indicate timeslicing is disabled. */
#define RTEMS_NO_TIMESLICE 0x00000000
/** This mode constant is used to indicate timeslicing is enabled. */
#define RTEMS_TIMESLICE 0x00000200
/** This mode constant is used to indicate signal processing is enabled. */
#define RTEMS_ASR 0x00000000
/** This mode constant is used to indicate signal processing is disabled. */
#define RTEMS_NO_ASR 0x00000400
/**
* @brief RTEMS_INTERRUPT_LEVEL
*
* This function returns the processor dependent interrupt
* level which corresponds to the requested interrupt level.
*
* @note RTEMS supports 256 interrupt levels using the least
* significant eight bits of MODES.CONTROL. On any
* particular CPU, fewer than 256 levels may be supported.
*/
#define RTEMS_INTERRUPT_LEVEL( _mode_set ) \
( (_mode_set) & RTEMS_INTERRUPT_MASK )
/**
* @brief Interrupt Mask Variable
*
* This variable is used by bindings from languages other than C and C++.
*/
extern const uint32_t rtems_interrupt_mask;
/**
* @brief Body for RTEMS_INTERRUPT_LEVEL macro.
*
* @param[in] level is the desired interrupt level
*
* @return This methods returns a mode with the desired interrupt
* @a level in the proper bitfield location.
*
* @note This variable is used by bindings from languages other than
* C and C++.
*/
Modes_Control rtems_interrupt_level_body(
uint32_t level
);
#ifndef __RTEMS_APPLICATION__
#include <rtems/rtems/modes.inl>
#endif
#ifdef __cplusplus
}
#endif
/**@}*/
#endif
/* end of include file */
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