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/* modes.h
*
* This include file contains all constants and structures associated
* with the RTEMS thread and RTEMS_ASR modes.
*
* COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
* On-Line Applications Research Corporation (OAR).
* All rights assigned to U.S. Government, 1994.
*
* This material may be reproduced by or for the U.S. Government pursuant
* to the copyright license under the clause at DFARS 252.227-7013. This
* notice must appear in all copies of this file and its derivatives.
*
* $Id$
*/
#ifndef __RTEMS_MODES_h
#define __RTEMS_MODES_h
#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 unsigned32 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
#define RTEMS_DEFAULT_MODES 0x00000000
#define RTEMS_CURRENT_MODE 0
#define RTEMS_PREEMPT_MASK 0x00000100 /* preemption bit */
#define RTEMS_TIMESLICE_MASK 0x00000200 /* timeslice bit */
#define RTEMS_ASR_MASK 0x00000400 /* RTEMS_ASR enable bit */
#define RTEMS_INTERRUPT_MASK CPU_MODES_INTERRUPT_MASK
#define RTEMS_PREEMPT 0x00000000 /* enable preemption */
#define RTEMS_NO_PREEMPT 0x00000100 /* disable preemption */
#define RTEMS_NO_TIMESLICE 0x00000000 /* disable timeslicing */
#define RTEMS_TIMESLICE 0x00000200 /* enable timeslicing */
#define RTEMS_ASR 0x00000000 /* enable RTEMS_ASR */
#define RTEMS_NO_ASR 0x00000400 /* disable RTEMS_ASR */
/*
* The number of bits for interrupt levels is CPU dependent.
* RTEMS supports 0 to 256 levels in bits 0-7 of the mode.
*/
/*
* RTEMS_INTERRUPT_LEVEL
*
* DESCRIPTION:
*
* 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.
*/
STATIC INLINE unsigned32 RTEMS_INTERRUPT_LEVEL (
Modes_Control mode_set
);
/*
* _Modes_Mask_changed
*
* DESCRIPTION:
*
* This function returns TRUE if any of the mode flags in mask
* are set in mode_set, and FALSE otherwise.
*/
STATIC INLINE boolean _Modes_Mask_changed (
Modes_Control mode_set,
Modes_Control masks
);
/*
* _Modes_Is_asr_disabled
*
* DESCRIPTION:
*
* This function returns TRUE if mode_set indicates that Asynchronous
* Signal Processing is disabled, and FALSE otherwise.
*/
STATIC INLINE boolean _Modes_Is_asr_disabled (
Modes_Control mode_set
);
/*
* _Modes_Is_preempt
*
* DESCRIPTION:
*
* This function returns TRUE if mode_set indicates that preemption
* is enabled, and FALSE otherwise.
*/
STATIC INLINE boolean _Modes_Is_preempt (
Modes_Control mode_set
);
/*
* _Modes_Is_timeslice
*
* DESCRIPTION:
*
* This function returns TRUE if mode_set indicates that timeslicing
* is enabled, and FALSE otherwise.
*/
STATIC INLINE boolean _Modes_Is_timeslice (
Modes_Control mode_set
);
/*
* _Modes_Get_interrupt_level
*
* DESCRIPTION:
*
* This function returns the interrupt level portion of the mode_set.
*/
STATIC INLINE ISR_Level _Modes_Get_interrupt_level (
Modes_Control mode_set
);
/*
* _Modes_Set_interrupt_level
*
* DESCRIPTION:
*
* This routine sets the current interrupt level to that specified
* in the mode_set.
*/
STATIC INLINE void _Modes_Set_interrupt_level (
Modes_Control mode_set
);
/*
* _Modes_Change
*
* DESCRIPTION:
*
* This routine changes the modes in old_mode_set indicated by
* mask to the requested values in new_mode_set. The resulting
* mode set is returned in out_mode_set and the modes that changed
* is returned in changed.
*/
STATIC INLINE void _Modes_Change (
Modes_Control old_mode_set,
Modes_Control new_mode_set,
Modes_Control mask,
Modes_Control *out_mode_set,
Modes_Control *changed
);
#include <rtems/rtems/modes.inl>
#ifdef __cplusplus
}
#endif
#endif
/* end of include file */
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