103 lines
3.3 KiB
C
103 lines
3.3 KiB
C
/* $NetBSD: dma.h,v 1.12 2017/10/07 16:05:31 jdolecek Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1995 Leo Weppelman.
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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.
|
|
*/
|
|
|
|
#ifndef _MACHINE_DMA_H
|
|
#define _MACHINE_DMA_H
|
|
|
|
/*
|
|
* Atari TT hardware:
|
|
* FDC/ACSI DMA circuitry
|
|
*/
|
|
|
|
#define DMA ((struct dma *)AD_DMA)
|
|
|
|
struct dma {
|
|
volatile short dma_gap[2]; /* reserved */
|
|
volatile u_short dma_data; /* controller data path */
|
|
volatile u_short dma_mode; /* mode register */
|
|
volatile u_char dma_addr[6]; /* base address H/M/L */
|
|
volatile u_short dma_drvmode; /* floppy density settings */
|
|
};
|
|
|
|
#define dma_nsec dma_data /* sector count */
|
|
#define dma_stat dma_mode /* status register */
|
|
|
|
/*
|
|
* Mode register bits
|
|
*/
|
|
/* 0x0001 *//* not used */
|
|
#define DMA_A0 0x0002 /* signal A0 to fdc/hdc */
|
|
#define DMA_A1 0x0004 /* signal A1 to fdc/hdc */
|
|
#define DMA_HDC 0x0008 /* must be on if accessing hdc */
|
|
#define DMA_SCREG 0x0010 /* access sector count register */
|
|
/* 0x0020 *//* reserved */
|
|
#define DMA_NODMA 0x0040 /* no DMA (yet) */
|
|
#define DMA_FDC 0x0080 /* must be on if accessing fdc */
|
|
#define DMA_WRBIT 0x0100 /* write to fdc/hdc via dma_data*/
|
|
#define DMA_SCSI 0x0088 /* select 5380 chip */
|
|
|
|
/*
|
|
* Status register bits
|
|
*/
|
|
#define DMAOK 0x0001 /* something wrong */
|
|
#define SCNOT0 0x0002 /* sector count not 0 */
|
|
#define DATREQ 0x0004 /* FDC data request signal */
|
|
|
|
/*
|
|
* Indices into dma_addr.
|
|
* Access low byte of 16 bits.
|
|
* Fill low/mid/high in this order.
|
|
*/
|
|
#define AD_HIGH 1
|
|
#define AD_MID 3
|
|
#define AD_LOW 5
|
|
|
|
/*
|
|
* Defines for 'dmadrv_mode'.
|
|
*/
|
|
#define FDC_HDSET 1 /* Set FDC for High density */
|
|
#define FDC_HDSIG 2 /* Signal HD present to drive */
|
|
|
|
/*
|
|
* Lock status bits:
|
|
*/
|
|
#define DMA_LOCK_REQ 1 /* DMA lock requested */
|
|
#define DMA_LOCK_GRANT 2 /* DMA lock granted */
|
|
|
|
#ifdef _KERNEL
|
|
typedef void (*dma_farg)(void*);
|
|
|
|
int st_dmagrab(dma_farg, dma_farg, void *, int *, int, kmutex_t *);
|
|
void st_dmafree(void *, int *);
|
|
int st_dmawanted(void);
|
|
void st_dmaaddr_set(void *);
|
|
u_long st_dmaaddr_get(void);
|
|
void st_dmacomm(int, int);
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* _MACHINE_DMA_H */
|