rx50.h

<B>Digital的Unix操作系统VAX 4.2源码</B>

/*
 *	@(#)rx50.h	4.1	(ULTRIX)	7/2/90	
 */

/************************************************************************
 *									*
 *			Copyright (c) 1985 by				*
 *		Digital Equipment Corporation, Maynard, MA		*
 *			All rights reserved.				*
 *									*
 *   This software is furnished under a license and may be used and	*
 *   copied  only  in accordance with the terms of such license and	*
 *   with the  inclusion  of  the  above  copyright  notice.   This	*
 *   software  or  any	other copies thereof may not be provided or	*
 *   otherwise made available to any other person.  No title to and	*
 *   ownership of the software is hereby transferred.			*
 *									*
 *   The information in this software is subject to change  without	*
 *   notice  and should not be construed as a commitment by Digital	*
 *   Equipment Corporation.						*
 *									*
 *   Digital assumes no responsibility for the use  or	reliability	*
 *   of its software on equipment which is not supplied by Digital.	*
 *									*
 ************************************************************************/

/* ------------------------------------------------------------------------
 * Modification History: /sys/vax/rx50.h
 *
 * 02-Apr-86 -- jaw  add support for nautilus console and memory adapter
 *
 * 19-Jun-85 -- jaw
 *	VAX8200 name change.
 *
 * 18 Jun 85 -- jaw
 * 	had to fixup image activation...  
 *
 * 06 Jun 85 -- jaw
 *	made it work.
 *
 * 07 JAN 85 -- jaw
 *	Add support for VAX820.
 *
 * ------------------------------------------------------------------------
 */
struct	buf	rrx5buf[2] ;	 /*buffer for raw I/O */

short	  rx5_unit ;	   /* unit(drive number) for current transfer */
			/* determined from minor device number	*/
			/* contained in buffer header		*/
#define FILL	1
#define EMPTY	0
#define N_RX5	 2	/* number of drives for this configuration */

#define RX5_MAX_TRANSFER 65536

/* Control bits for control and status register rx5cs0 */
#define GO	01	/* go - drive initiates command - 01 */
#define MAINT	020	/* maintenance test of drive -	  10 */
#define RESTORE 040	/* restore drive -		  20 */
#define RX50_DONE 010	/* drive done			     */
#define READ	0100	/* read a sector -		  40 */
#define WRITE	0160	/* write a sector -		  70 */
#define ERROR	0200	/* error indicator -		  80 */

/* register structure of the rx50 controller in the XT-100 */
struct	v8200rx50
	{
	u_short rx5id	  ,	/* identification register   -	00 */
		reserved  ,	/* reserved to hardware      -	02 */				rx5cs0	  ,	/* csr0 command func. reg.   -	04 */
		rx5cs1	  ,	/* csr1 track register	     -	06 */
		rx5cs2	  ,	/* csr2 sector register      -	08 */
		rx5cs3	  ,	/* csr3 current sector reg.  -	0A */
		rx5cs4	  ,	/* csr4 incorrect track reg. -	0C */
		rx5extcmd ,	/* extend command register   -	0E */
		rx5edb	  ,	/* empty data buffer ; silo  -	10 */
		rx5ca	  ,	/* clear addr of data buffer -	12 */
		rx5go	  ,	/* go ; execute command      -	14 */
		rx5fdb	  ;	/* fill data buffer ;  silo  -	16 */
	} ;

#define RX5OPEN 0x01
#define RX5BUSY 0x02

struct rx5tab {
	int rx5_state;
	int rx5_opstate;
	int rx5blk;
	int rx5resid;
	struct buf *rx5_buf;
	char *rx5addr;
	int command[3];
	int id;
	int count;
	int cmdcount;
};