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・DMAデータ転送終了割り込みハンドラの設定部分を修正 git-svn-id: file:///Users/lillianskinner/Downloads/platinum/twl/TwlIPL/trunk@1068 b08762b0-b915-fc4b-9d8c-17b2551a87ff
117 lines
4.4 KiB
C
117 lines
4.4 KiB
C
/*---------------------------------------------------------------------------*
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Project: TwlIPL
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File: customNDma.c
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Copyright 2007-2008 Nintendo. All rights reserved.
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These coded instructions, statements, and computer programs contain
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proprietary information of Nintendo of America Inc. and/or Nintendo
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Company Ltd., and are protected by Federal copyright law. They may
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not be disclosed to third parties or copied or duplicated in any form,
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in whole or in part, without the prior written consent of Nintendo.
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*---------------------------------------------------------------------------*/
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#include <twl.h>
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#include <sysmenu.h>
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#include <hotswTypes.h>
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#include <customNDma.h>
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// Define data --------------------------------------------------------------
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#define NDMA_WORD_COUNT_1 0x1
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#define ASSERT_DMANO( ndmaNo ) SDK_ASSERTMSG( (ndmaNo) <= MI_NDMA_MAX_NUM, "illegal NDMA No." );
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extern CardThreadData HotSwThreadData;
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// Function prototype -------------------------------------------------------
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static void HOTSWi_NDmaCopy_Card(u32 ndmaNo, const void *src, void *dest, u32 size, u32 dcont);
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static void InterruptCallbackNDma(void);
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// ===========================================================================
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// Function Describe
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// ===========================================================================
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/*---------------------------------------------------------------------------*
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Name: HOTSW_NDmaCopy_Card
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Description: カードから送られてきたデータを指定アドレスにDMA転送する
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*---------------------------------------------------------------------------*/
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void HOTSW_NDmaCopy_Card(u32 ndmaNo, const void *src, void *dest, u32 size)
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{
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HOTSWi_NDmaCopy_Card(ndmaNo, src, dest, size, MI_NDMA_DEST_INC);
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}
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/*---------------------------------------------------------------------------*
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Name: HOTSW_NDmaPipe_Card
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Description: カードから送られてきたデータを指定アドレスにDMA転送で読み捨てる
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*---------------------------------------------------------------------------*/
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void HOTSW_NDmaPipe_Card(u32 ndmaNo, const void *src, void *dest, u32 size)
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{
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HOTSWi_NDmaCopy_Card(ndmaNo, src, dest, size, MI_NDMA_DEST_FIX);
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}
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/*---------------------------------------------------------------------------*
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Name: HOTSWi_NDmaCopy_Card
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Description: DMA転送の準備
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注：先にこの関数でDMA転送の準備をしてから、カードレジスタのstartフラグを上げてください
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*---------------------------------------------------------------------------*/
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static void HOTSWi_NDmaCopy_Card(u32 ndmaNo, const void *src, void *dest, u32 size, u32 dcont)
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{
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u32 contData;
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OSIntrMode enabled = OS_DisableInterrupts();
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//--- Assert
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ASSERT_DMANO( ndmaNo );
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//---- confirm CARD free
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HOTSW_WaitCardCtrl();
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//---- confirm DMA free
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HOTSW_WaitDmaCtrl(ndmaNo);
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//---- Handler Set
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(void)OS_SetIrqFunction(OS_IE_NDMA2, InterruptCallbackNDma);
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//---- set up registers
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MI_NDMA_REG( ndmaNo, MI_NDMA_REG_SAD_WOFFSET ) = (u32)src;
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MI_NDMA_REG( ndmaNo, MI_NDMA_REG_DAD_WOFFSET ) = (u32)dest;
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MI_NDMA_REG( ndmaNo, MI_NDMA_REG_BCNT_WOFFSET ) = MI_NDMA_INTERVAL_PS_1;
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MI_NDMA_REG( ndmaNo, MI_NDMA_REG_TCNT_WOFFSET ) = (u32)(size/4);
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MI_NDMA_REG( ndmaNo, MI_NDMA_REG_WCNT_WOFFSET ) = NDMA_WORD_COUNT_1;
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//---- decide control register
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contData = MI_NDMA_BWORD_1 | MI_NDMA_ENABLE/* | MI_NDMA_CONTINUOUS_ON*/;
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contData |= MI_NDMA_SRC_FIX | dcont | MI_NDMA_SRC_RELOAD_DISABLE | MI_NDMA_DEST_RELOAD_DISABLE;
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#ifndef DEBUG_USED_CARD_SLOT_B_
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contData |= MI_NDMA_TIMING_CARD_A;
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#else
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contData |= MI_NDMA_TIMING_CARD_B;
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#endif
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//---- set interrupt enable
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contData |= MI_NDMA_IF_ENABLE;
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//---- start
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MI_NDMA_REG( ndmaNo, MI_NDMA_REG_CNT_WOFFSET ) = contData;
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(void)OS_RestoreInterrupts( enabled );
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}
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/*---------------------------------------------------------------------------*
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Name: InterruptCallbackNDma
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Description: カードB データ転送終了割り込みハンドラ
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*---------------------------------------------------------------------------*/
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static void InterruptCallbackNDma(void)
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{
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// メッセージ送信
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OS_SendMessage(&HotSwThreadData.hotswDmaQueue, (OSMessage *)&HotSwThreadData.hotswDmaMsg[HotSwThreadData.idx_dma], OS_MESSAGE_NOBLOCK);
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// メッセージインデックスをインクリメント
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HotSwThreadData.idx_dma = (HotSwThreadData.idx_dma+1) % HOTSW_DMA_MSG_NUM;
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}
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