NetBSD/sys/arch/arm32/iomd/iomd_dma.h

76 lines
2.5 KiB
C

/* $NetBSD: iomd_dma.h,v 1.1 1997/10/14 11:06:57 mark Exp $ */
/*
* Copyright (c) 1997 Scott Stevens
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Scott Stevens.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)dmavar.h
*/
/*
* dma structures
*/
struct dma_ctrl {
int dc_flags;
int dc_channel;
int dc_dmasize;
volatile u_int *dc_cura;
volatile u_int *dc_enda;
volatile u_int *dc_curb;
volatile u_int *dc_endb;
volatile u_char *dc_cr;
volatile u_char *dc_st;
u_char *dc_nextaddr;
int dc_len;
irqhandler_t dc_ih;
};
#define DMA_FL_ACTIVE 0x01
#define DMA_FL_READY 0x02
#define DMA_CR_CLEAR 0x80
#define DMA_CR_DIR 0x40
#define DMA_CR_ENABLE 0x20
#define DMA_CR_INC 0x1f
#define DMA_ST_CHAN 0x01
#define DMA_ST_INT 0x02
#define DMA_ST_OVER 0x04
#define DMA_ST_MASK (DMA_ST_CHAN | DMA_ST_INT | DMA_ST_OVER)
#define DMA_END_STOP 0x80000000
#define DMA_END_LAST 0x40000000
/* Prototypes */
struct dma_ctrl *dma_init __P((int, int, int, int));
void dma_go __P((struct dma_ctrl *));