pros_edma3protectcrit_ebinder.s

vicp做为dm6446上的硬件加速器

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;/** \file   pros_edma3ProtectCrit_ebinder.s
;    \brief  OsPROTECT Assembly code for Interrupt protect
;
;    This file implements OS Protect Interrupt call. Since PrOS does not provide
;    a function that stores previous status of interrupts (cpsr register), this
;    function shall do the same
;
;    (C) Copyright 2004, Texas Instruments, Inc
;
;    \author     Sukumar Ghorai
;    \version    0.1    Created
; */

		EXPORT Edma3_critsec32
		EXPORT Edma3_endcrit32

		AREA |CODE$$edma3_osProtectCrit|, CODE, READONLY
		ALIGN 4
		CODE32

Edma3_critsec32
		mrs             r1, cpsr
		mov             r0,r1
		orr             r1, r1, #0xc0
		msr             cpsr_cxsf, R1
		bx              r14

		ALIGN 4
Edma3_endcrit32
		msr             cpsr_cxsf, R0
		bx              r14

		END