diff options
Diffstat (limited to 'c/src/exec/rtems/include/rtems/rtems/modes.h')
-rw-r--r-- | c/src/exec/rtems/include/rtems/rtems/modes.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/c/src/exec/rtems/include/rtems/rtems/modes.h b/c/src/exec/rtems/include/rtems/rtems/modes.h new file mode 100644 index 0000000000..90327636c1 --- /dev/null +++ b/c/src/exec/rtems/include/rtems/rtems/modes.h @@ -0,0 +1,89 @@ +/* modes.h + * + * This include file contains all constants and structures associated + * with the RTEMS thread and RTEMS_ASR modes. + * + * COPYRIGHT (c) 1989-1997. + * On-Line Applications Research Corporation (OAR). + * Copyright assigned to U.S. Government, 1994. + * + * The license and distribution terms for this file may in + * the file LICENSE in this distribution or at + * http://www.OARcorp.com/rtems/license.html. + * + * $Id$ + */ + +#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. + */ + +/*PAGE + * + * 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. + */ + +#define RTEMS_INTERRUPT_LEVEL( _mode_set ) \ + ( (_mode_set) & RTEMS_INTERRUPT_MASK ) + + +#ifndef __RTEMS_APPLICATION__ +#include <rtems/rtems/modes.inl> +#endif + +#ifdef __cplusplus +} +#endif + +#endif +/* end of include file */ |