#/* *//* * RS03/04 disk driver */#include "../param.h"#include "../buf.h"#include "../conf.h"#include "../user.h"struct {	int	hscs1;	/* Control and Status register 1 */	int	hswc;	/* Word count register */	int	hsba;	/* UNIBUS address register */	int	hsda;	/* Desired address register */	int	hscs2;	/* Control and Status register 2 */	int	hsds;	/* Drive Status */	int	hser;	/* Error register */	int	hsas;	/* not used */	int	hsla;	/* not used */	int	hsdb;	/* not used */	int	hsmr;	/* not used */	int	hsdt;	/* not used */	int	hsbae;	/* 11/70 bus extension */};struct	devtab	hstab;struct	buf	rhsbuf;#define	HSADDR	0172040#define ERR	040000	/* hscs1 - composite error */#define GO	01#define RCLR	010#define	DRY	0200	/* hsds - Drive Ready */hsstrategy(abp)struct buf *abp;{	register struct buf *bp;	register mblks;	bp = abp;	mblks = 1024; /* RJS03 */	if(bp->b_dev.d_minor >= 8)		mblks = 2048; /* RJS04 */	if(bp->b_blkno >= mblks) {		bp->b_flags =| B_ERROR;		iodone(bp);		return;	}	bp->av_forw = 0;	spl5();	if (hstab.d_actf==0)		hstab.d_actf = bp; else		hstab.d_actl->av_forw = bp;	hstab.d_actl = bp;	if (hstab.d_active==0)		hsstart();	spl0();}hsstart(){	register struct buf *bp;	register addr;	if ((bp = hstab.d_actf) == 0)		return;	hstab.d_active++;	addr = bp->b_blkno;	if(bp->b_dev.d_minor < 8)		addr =<< 1; /* RJS03 */	HSADDR->hscs2 = bp->b_dev.d_minor & 07;	rhstart(bp, &HSADDR->hsda, addr<<1, &HSADDR->hsbae);}hsintr(){	register struct buf *bp;	if (hstab.d_active == 0)		return;	bp = hstab.d_actf;	hstab.d_active = 0;	if(HSADDR->hscs1 & ERR){	/* error bit */		deverror(bp, HSADDR->hscs2, 0);		HSADDR->hscs1 = RCLR|GO;		if (++hstab.d_errcnt <= 10) {			hsstart();			return;		}		bp->b_flags =| B_ERROR;	}	hstab.d_errcnt = 0;	hstab.d_actf = bp->av_forw;	iodone(bp);	hsstart();}hsread(dev){	physio(hsstrategy, &rhsbuf, dev, B_READ);}hswrite(dev){	physio(hsstrategy, &rhsbuf, dev, B_WRITE);}