pros_edma3protectcrit.s

vicp做为dm6446上的硬件加速器

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;/** \file   pros_edma3ProtectCrit.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
; */
                .global         _Edma3_critsec32
                .global         _Edma3_endcrit32

                .if __TI_ARM9ABI_ASSEMBLER
                .armfunc         _Edma3_critsec32
                .armfunc         _Edma3_endcrit32
                .endif

                .global         _gintmask

                .text

                .align
                .state32
_Edma3_critsec32:
                mrs             r1, cpsr
                mov             r0,r1
                orr             r1, r1, #0xc0
                msr             cpsr, R1
                bx              r14

                .align
                .state32
_Edma3_endcrit32:
                msr             cpsr, R0
                bx              r14

                .end