tx_tic.68

ThreadX优秀的硬实时操作系统.This Express Start Guide is designed to help you install and use ThreadX for the

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/*                                                                        */ 
/*            Copyright (c) 1996-2000 by Express Logic Inc.               */ 
/*                                                                        */ 
/*  This software is copyrighted by and is the sole property of Express   */ 
/*  Logic, Inc.  All rights, title, ownership, or other interests         */ 
/*  in the software remain the property of Express Logic, Inc.  This      */ 
/*  software may only be used in accordance with the corresponding        */ 
/*  license agreement.  Any unauthorized use, duplication, transmission,  */ 
/*  distribution, or disclosure of this software is expressly forbidden.  */ 
/*                                                                        */
/*  This Copyright notice may not be removed or modified without prior    */ 
/*  written consent of Express Logic, Inc.                                */ 
/*                                                                        */ 
/*  Express Logic, Inc. reserves the right to modify this software        */ 
/*  without notice.                                                       */ 
/*                                                                        */ 
/*  Express Logic, Inc.                                                   */
/*  11440 West Bernardo Court               [e-mail]         */
/*  Suite 366                               http://www.expresslogic.com   */
/*  San Diego, CA  92127                                                  */
/*                                                                        */
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/**                                                                       */ 
/** ThreadX Component                                                     */ 
/**                                                                       */
/**   Thread Control (THR)                                                */
/**                                                                       */
/**************************************************************************/
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/* #define    TX_SOURCE_CODE  */


/* Include necessary system files.  */

/*  #include   "tx_api.h"
    #include   "tx_thr.h"  */


	SECT	.text,x
    ALIGN   4
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/*                                                                        */ 
/*  FUNCTION                                               RELEASE        */ 
/*                                                                        */ 
/*    _tx_thread_interrupt_control                    68332/Green Hills   */ 
/*                                                           3.0a         */ 
/*  AUTHOR                                                                */ 
/*                                                                        */ 
/*    William E. Lamie, Express Logic, Inc.                               */ 
/*                                                                        */ 
/*  DESCRIPTION                                                           */ 
/*                                                                        */ 
/*    This function is responsible for changing the interrupt lockout     */ 
/*    posture of the system.                                              */ 
/*                                                                        */ 
/*  INPUT                                                                 */ 
/*                                                                        */ 
/*    new_posture                           New interrupt lockout posture */ 
/*                                                                        */ 
/*  OUTPUT                                                                */ 
/*                                                                        */ 
/*    old_posture                           Old interrupt lockout posture */ 
/*                                                                        */ 
/*  CALLS                                                                 */ 
/*                                                                        */ 
/*    None                                                                */ 
/*                                                                        */ 
/*  CALLED BY                                                             */ 
/*                                                                        */ 
/*    Application Code                                                    */ 
/*                                                                        */ 
/*  RELEASE HISTORY                                                       */ 
/*                                                                        */ 
/*    DATE              NAME                      DESCRIPTION             */ 
/*                                                                        */ 
/*  09-07-1999     William E. Lamie         Initial Version 3.0           */ 
/*  12-02-1999     William E. Lamie         Modified comment(s),          */ 
/*                                            resulting in version 3.0a.  */ 
/*                                                                        */ 
/**************************************************************************/ 
/* UINT   _tx_thread_interrupt_control(UINT new_posture)
{  */
    XDEF  _tx_thread_interrupt_control
_tx_thread_interrupt_control:

    /* Pickup current interrupt lockout posture.  */

    clr.l   %D0                         ; Clear out d0
    move.w  %SR,%D0                     ; Status register is in d0
    move.l  %D0,%D1                     ; Copy it into d1
    andi.w  #$0700,%D0                  ; Clear non-interrupt bits

    /* Apply the new interrupt posture.  */

    andi.w  #$F8FF,%D1                  ; Clear only the interrupt bits
    or.w    6(%A7),%D1                  ; Setup new posture
    move.w  %D1,%SR                     ; Apply it to the status register

    rts                                 ; Return to caller
/* }  */
    END