_csl_begincriticalsection.asm

针对dsp 6455 的csl支持库

;/*   ==========================================================
; *   Copyright (c) Texas Instruments Inc 2004, 2005
; *
; *   Use of this software is controlled by the terms and conditions found
; *   in the license agreement under which this software has been supplied
; *   priovided
; *   ==========================================================
; */
;****************************************************************************
;*                    E X P O R T E D     F U N C T I O N S
;****************************************************************************
    .global __CSL_beginCriticalSection
;****************************************************************************
;*                         P A S S - T H R U   C O D E
;****************************************************************************

  .text
;****************************************************************************
;*                       P U B L I C   F U N C T I O N S
;****************************************************************************

;****************************************************************************
;*  
;*   void _CSL_beginCriticalSection (
;*           void
;*   )
;****************************************************************************

_CSL_SGIE_MASK .equ 0x00000002

__CSL_beginCriticalSection:
	bnop b3,2
	dint	
	mvc tsr, b0
	and _CSL_SGIE_MASK, b0, a4
	
	


****************************************************************************
* End of _CSL_beginCriticalSection.asm
****************************************************************************