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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/sh/include/cpu-sh3/cpu/dma-register.h
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/*

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 * SH3 CPU-specific DMA definitions, used by both DMA drivers

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 *

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 * Copyright (C) 2010 Guennadi Liakhovetski <[email protected]>

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 *

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 * This program is free software; you can redistribute it and/or modify

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 * it under the terms of the GNU General Public License version 2 as

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 * published by the Free Software Foundation.

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 */

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#ifndef CPU_DMA_REGISTER_H

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#define CPU_DMA_REGISTER_H

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#define CHCR_TS_LOW_MASK	0x18

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#define CHCR_TS_LOW_SHIFT	3

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#define CHCR_TS_HIGH_MASK	0

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#define CHCR_TS_HIGH_SHIFT	0

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#define DMAOR_INIT	DMAOR_DME

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/*

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 * The SuperH DMAC supports a number of transmit sizes, we list them here,

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 * with their respective values as they appear in the CHCR registers.

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 */

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enum {

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	XMIT_SZ_8BIT,

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	XMIT_SZ_16BIT,

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	XMIT_SZ_32BIT,

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	XMIT_SZ_128BIT,

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};

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/* log2(size / 8) - used to calculate number of transfers */

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#define TS_SHIFT {			\

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	[XMIT_SZ_8BIT]		= 0,	\

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	[XMIT_SZ_16BIT]		= 1,	\

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	[XMIT_SZ_32BIT]		= 2,	\

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	[XMIT_SZ_128BIT]	= 4,	\

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}

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#define TS_INDEX2VAL(i)	(((i) & 3) << CHCR_TS_LOW_SHIFT)

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#endif

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