amisr_dmac.src

Wince4.2 BSP for SH4 engineering development board

;
;       Copyright (c) Renesas Technology Corp. 2001-2003  All Rights Reserved.
;
;       OEM Adaptation Layer
;
; ----------------------------------------------------------------------------
;
;   FILE      : AMISR_DMAC.SRC
;   CREATED   : 2001. 7. 5
;   MODIFIED  : 2003.08.06
;   AUTHOR    : Renesas Technology Corp.
;   HARDWARE  : RENESAS US7751-HRP1xC (BigSur with HD64404, ITS-DS2A),
;               RENESAS HS7751RSTC01H (S1-E, ITS-DS5)
;   TARGET OS : Microsoft(R) Windows(R) CE .NET 4.2
;   NOTES     : 
;   FUNCTION  : Interrupt service routine for HD64404 DMAC module
;   HISTORY   :
;               2001. 7. 5
;               - Initially created.
;               2002. 1.21
;               - Address parameters are modified to refer "HD64404.INC".
;               2002. 5.30
;               - Changed to include platform-independent platform include
;                file "PLATFORM.INC".
;               2002. 9. 9
;               - Header style is changed and file information is added.
;				2002. 9. 26
;				- Released


    .include "kxshx.h"
    .include "oalintr.inc"
    .include "platform.inc"
    .include "hd64404.inc"

    .import  _DMA_ISR_TABLE

    LEAF_ENTRY HD64404_DMACISR

    mov.l       #DMA_INTERRUPT_SOURCE, r1
    mov.l       @r1, r3
    mov.l       r3, r2
    shll16.l    r2
    mov.l       r2, @r1

    mov.l       #DMA_STATUS, r0
    mov.l       #0, r1
    mov.l       r1, @r0

    mov         #0, r2
BitCheckLoop:
    mov         #16, r1
    cmp/hi.l    r2, r1
    bf          NopExit
    shlr        r3
    bt          EndLoop
    add         #1, r2
    bra         BitCheckLoop
EndLoop:
    nop

    mov.l       #_DMA_ISR_TABLE, r0
    shll2.l     r2
    add.l       r2, r0
    mov.l       @r0, r2
    tst.l       r2, r2
    bt          NopExit

    mov.l       @r0, r0
    jmp         @r0
    nop

NopExit:
    rts
    mov         #SYSINTR_NOP, r0

    ENTRY_END

    .end