[unix-history] / usr / src / sys / vax / mba / hp.c

/*	hp.c	3.3	%H%	*/

/*
 * RP04/RP06/RM03 disk driver
 */

#include "../h/param.h"
#include "../h/systm.h"
#include "../h/buf.h"
#include "../h/conf.h"
#include "../h/dir.h"
#include "../h/user.h"
#include "../h/map.h"
#include "../h/mba.h"
#include "../h/mtpr.h"
#include "../h/pte.h"

#define	DK_N	0

struct	device
{
	int	hpcs1;		/* control and Status register 1 */
	int	hpds;		/* Drive Status */
	int	hper1;		/* Error register 1 */
	int	hpmr;		/* Maintenance */ 
	int	hpas;		/* Attention Summary */
	int	hpda;		/* Desired address register */
	int	hpdt;		/* Drive type */
	int	hpla;		/* Look ahead */
	int	hpsn;		/* serial number */
	int	hpof;		/* Offset register */
	int	hpdc;		/* Desired Cylinder address register */
	int	hpcc;		/* Current Cylinder */
	int	hper2;		/* Error register 2 */
	int	hper3;		/* Error register 3 */
	int	hpec1;		/* Burst error bit position */
	int	hpec2;		/* Burst error bit pattern */
};

#define	HPADDR	((struct device *)(MBA0 + MBA_ERB))
#define	NHP	1
#define	RP	022
#define	RM	024
#define	NSECT	22
#define	NTRAC	19
#define	NRMSECT	32
#define	NRMTRAC	5
#define	SDIST	2
#define	RDIST	6

struct	size
{
	daddr_t	nblocks;
	int	cyloff;
} hp_sizes[8] =
{
	15884,	0,		/* cyl 0 thru 37 */
	33440,	38,		/* cyl 38 thru 117 */
	8360,	98,		/* cyl 98 thru 117 */
#ifdef ERNIE
	15884,	118,		/* cyl 118 thru 155 */
	66880,	156,		/* cyl 156 thru 315 */
	0,	0,
	291346,	118,		/* cyl 118 thru 814, (like distrib) */
	208582,	316,		/* cyl 316 thru 814 */
#else
	0,	0,
	0,	0,
	0,	0,
	291346,	118,		/* cyl 118 thru 814 */
	0,	0,
#endif
}, rm_sizes[8] = {
	15884,	0,		/* cyl 0 thru 99 */
	33440,	100,		/* cyl 100 thru 309 */
	0,	0,
	0,	0,
	0,	0,
	0,	0,
	82080,	310,		/* cyl 310 thru 822 */
	0,	0,
};

#define	P400	020
#define	M400	0220
#define	P800	040
#define	M800	0240
#define	P1200	060
#define	M1200	0260
int	hp_offset[16] =
{
	P400, M400, P400, M400,
	P800, M800, P800, M800,
	P1200, M1200, P1200, M1200,
	0, 0, 0, 0,
};

struct	buf	hptab;
struct	buf	rhpbuf;
struct	buf	hputab[NHP];
char	hp_type[NHP];	/* drive type */

#define	GO	01
#define	PRESET	020
#define	RTC	016
#define	OFFSET	014
#define	SEARCH	030
#define	RECAL	06
#define	DCLR	010
#define	WCOM	060
#define	RCOM	070

#define	IE	0100
#define	PIP	020000
#define	DRY	0200
#define	ERR	040000
#define	TRE	040000
#define	DCK	0100000
#define	WLE	04000
#define	ECH	0100
#define	VV	0100
#define	DPR	0400
#define	MOL	010000
#define	FMT22	010000

#define	b_cylin b_resid
 
#ifdef INTRLVE
daddr_t dkblock();
#endif
 
hpstrategy(bp)
register struct buf *bp;
{
	register struct buf *dp;
	register unit, xunit, nspc;
	long sz, bn;
	struct size *sizes;

	xunit = minor(bp->b_dev) & 077;
	sz = bp->b_bcount;
	sz = (sz+511) >> 9;
	unit = dkunit(bp);
	if (hp_type[unit] == 0) {
		struct device *hpaddr;

		/* determine device type */
		hpaddr = (struct device *)((int*)HPADDR + 32*unit);
		hp_type[unit] = hpaddr->hpdt;
	}
	if (hp_type[unit] == RM) {
		sizes = rm_sizes;
		nspc = NRMSECT*NRMTRAC;
	} else {
		sizes = hp_sizes;
		nspc = NSECT*NTRAC;
	}
	if (unit >= NHP ||
	    bp->b_blkno < 0 ||
	    (bn = dkblock(bp))+sz > sizes[xunit&07].nblocks) {
		bp->b_flags |= B_ERROR;
		iodone(bp);
		return;
	}
	bp->b_cylin = bn/nspc + sizes[xunit&07].cyloff;
	dp = &hputab[unit];
	(void) spl5();
	disksort(dp, bp);
	if (dp->b_active == 0) {
		hpustart(unit);
		if(hptab.b_active == 0)
			hpstart();
	}
	(void) spl0();
}

hpustart(unit)
register unit;
{
	register struct buf *bp, *dp;
	register struct device *hpaddr;
	daddr_t bn;
	int sn, cn, csn;

	((struct mba_regs *)MBA0)->mba_cr |= MBAIE;
	HPADDR->hpas = 1<<unit;

	if(unit >= NHP)
		return;
/*
	dk_busy &= ~(1<<(unit+DK_N));
*/
	dp = &hputab[unit];
	if((bp=dp->b_actf) == NULL)
		return;
	hpaddr = (struct device *)((int *)HPADDR + 32*unit);
	if((hpaddr->hpds & VV) == 0) {
		hpaddr->hpcs1 = PRESET|GO;
		hpaddr->hpof = FMT22;
	}
	if(dp->b_active)
		goto done;
	dp->b_active++;
	if ((hpaddr->hpds & (DPR|MOL)) != (DPR|MOL))
		goto done;

	bn = dkblock(bp);
	cn = bp->b_cylin;
	if(hp_type[unit] == RM) {
		sn = bn%(NRMSECT*NRMTRAC);
		sn = (sn+NRMSECT-SDIST)%NRMSECT;
	} else {
		sn = bn%(NSECT*NTRAC);
		sn = (sn+NSECT-SDIST)%NSECT;
	}

	if(cn - (hpaddr->hpdc & 0xffff))
		goto search;
	csn = ((hpaddr->hpla & 0xffff)>>6) - sn + SDIST - 1;
	if(csn < 0)
		csn += NSECT;
	if(csn > NSECT-RDIST)
		goto done;

search:
	hpaddr->hpdc = cn;
	hpaddr->hpda = sn;
	hpaddr->hpcs1 = SEARCH|GO;
/*
	unit += DK_N;
	dk_busy |= 1<<unit;
	dk_numb[unit] += 1;
*/
	return;

done:
	dp->b_forw = NULL;
	if(hptab.b_actf == NULL)
		hptab.b_actf = dp; else
		hptab.b_actl->b_forw = dp;
	hptab.b_actl = dp;
}

hpstart()
{
	register struct buf *bp, *dp;
	register unit;
	register struct device *hpaddr;
	daddr_t bn;
	int dn, sn, tn, cn, nspc, ns;

loop:
	if ((dp = hptab.b_actf) == NULL)
		return;
	if ((bp = dp->b_actf) == NULL) {
		hptab.b_actf = dp->b_forw;
		goto loop;
	}
	hptab.b_active++;
	unit = minor(bp->b_dev) & 077;
	dn = dkunit(bp);
	bn = dkblock(bp);
	if (hp_type[dn] == RM) {
		nspc = NRMSECT*NRMTRAC;
		ns = NRMSECT;
		cn = rm_sizes[unit&07].cyloff;
	} else {
		nspc = NSECT*NTRAC;
		ns = NSECT;
		cn = hp_sizes[unit&07].cyloff;
	}
	cn += bn/nspc;
	sn = bn%nspc;
	tn = sn/ns;
	sn = sn%ns;

	hpaddr =  (struct device *)((int *)HPADDR + 32*dn);
	if ((hpaddr->hpds & (DPR|MOL)) != (DPR|MOL)) {
		hptab.b_active = 0;
		hptab.b_errcnt = 0;
		dp->b_actf = bp->av_forw;
		bp->b_flags |= B_ERROR;
		iodone(bp);
		goto loop;
	}
	if(hptab.b_errcnt >= 16) {
		hpaddr->hpof = hp_offset[hptab.b_errcnt & 017] | FMT22;
		((struct mba_regs *)MBA0)->mba_cr &= ~MBAIE;
		hpaddr->hpcs1 = OFFSET|GO;
		while(hpaddr->hpds & PIP)
			;
		((struct mba_regs *)MBA0)->mba_cr |= MBAIE;
	}
	hpaddr->hpdc = cn;
	hpaddr->hpda = (tn << 8) + sn;
	mbastart(bp, (int *)hpaddr);

	dk_busy |= 1<<(DK_N /*+NHP*/);
	dk_numb[DK_N /*+NHP*/] += 1;
	unit = bp->b_bcount>>6;
	dk_wds[DK_N /*+NHP*/] += unit;
}

hpintr(mbastat, as)
{
	register struct buf *bp, *dp;
	register unit;
	register struct device *hpaddr;

	if(hptab.b_active) {
		dk_busy &= ~(1<<(DK_N /*+NHP*/));
		dp = hptab.b_actf;
		bp = dp->b_actf;
		unit = dkunit(bp);
		hpaddr = (struct device *)((int *)HPADDR + 32*unit);
		if (hpaddr->hpds & ERR || mbastat & MBAEBITS) {		/* error bit */
			while((hpaddr->hpds & DRY) == 0)
				;
			if(++hptab.b_errcnt > 28 || hpaddr->hper1&WLE)
				bp->b_flags |= B_ERROR; else
				hptab.b_active = 0;
			if(hptab.b_errcnt > 27)
				deverror(bp, mbastat, hpaddr->hper1);
			if ((hpaddr->hper1&0xffff) == DCK) {
				if (hpecc(hpaddr, bp))
					return;
			}
			hpaddr->hpcs1 = DCLR|GO;
			if((hptab.b_errcnt&07) == 4) {
				((struct mba_regs *)MBA0)->mba_cr &= ~MBAIE;
				hpaddr->hpcs1 = RECAL|GO;
				while(hpaddr->hpds & PIP)
					;
				((struct mba_regs *)MBA0)->mba_cr |= MBAIE;
			}
		}
		if(hptab.b_active) {
			if(hptab.b_errcnt) {
				((struct mba_regs *)MBA0)->mba_cr &= ~MBAIE;
				hpaddr->hpcs1 = RTC|GO;
				while(hpaddr->hpds & PIP)
					;
				((struct mba_regs *)MBA0)->mba_cr |= MBAIE;
			}
			hptab.b_active = 0;
			hptab.b_errcnt = 0;
			hptab.b_actf = dp->b_forw;
			dp->b_active = 0;
			dp->b_errcnt = 0;
			dp->b_actf = bp->av_forw;
			bp->b_resid = -(((struct mba_regs *)MBA0)->mba_bcr) & 0xffff;
			iodone(bp);
			if(dp->b_actf)
				hpustart(unit);
		}
		as &= ~(1<<unit);
	} else {
		if(as == 0)
			((struct mba_regs *)MBA0)->mba_cr |= MBAIE;
	}
	for(unit=0; unit<NHP; unit++)
		if(as & (1<<unit))
			hpustart(unit);
	hpstart();
}

hpread(dev)
{

	physio(hpstrategy, &rhpbuf, dev, B_READ, minphys);
}

hpwrite(dev)
{

	physio(hpstrategy, &rhpbuf, dev, B_WRITE, minphys);
}

hpecc(rp, bp)
register struct device *rp;
register struct buf *bp;
{
	register i;
	register b, n, map, mix;
	register char *cp;
	register mask;
	short piget();
	extern char buffers[NBUF][BSIZE];

	b = (((((struct mba_regs *)MBA0)->mba_bcr&0xffff) +
		(bp->b_bcount) - 1)>>9)&0177;
	printf("%D ", bp->b_blkno+b);
	prdev("ECC", bp->b_dev);
	mask = rp->hpec2&0xffff;
	if (mask == 0) {
		rp->hpof = FMT22;
		return(0);
	}
	i = (rp->hpec1&0xffff) - 1;
	n = i&017;
	i = (i&~017)>>3;
	if (bp->b_flags&B_PHYS)
		map = 128 + b;
	else
		map = ((bp->b_un.b_addr - (char *)buffers)>>9) + b;
	mix = i + ((int)bp->b_un.b_addr&0x1ff);
	i += b<<9;
	if ( i < bp->b_bcount) {
		cp = (char *)((((int *)MBA0_MAP)[map+(mix>>9)]&0x1fffff)<<9)+(mix&0x1ff);
		piput((int)cp,piget((int)cp)^(mask<<n));
	}
	mix += 2;
	i += 2;
	if (i < bp->b_bcount) {
		cp = (char *)((((int *)MBA0_MAP)[map+(mix>>9)]&0x1fffff)<<9)+(mix&0x1ff);
		piput((int)cp,piget((int)cp)^(mask>>(16-n)));
	}
	hptab.b_active++;
	if (((struct mba_regs *)MBA0)->mba_bcr) {
		i = bp->b_blkno%(NSECT*NTRAC);
		i = ((i/NSECT)<<8)+(i%NSECT);
		i = NSECT*(i>>8) + (i&0377) + b + 1;
		if (i >= NSECT*NTRAC) {
			i -= NSECT*NTRAC;
			rp->hpdc = bp->b_cylin + 1;
		} else
			rp->hpdc = bp->b_cylin;
		rp->hpda = ((i/NSECT)<<8) + (i%NSECT);
		rp->hpcs1 = DCLR|GO;
		((struct mba_regs *)MBA0)->mba_sr = -1;
		((struct mba_regs *)MBA0)->mba_var =
			((map+1)<<9)|((int)bp->b_un.b_addr&0x1ff);
		rp->hpcs1 = RCOM|GO;
		return(1);
	} else
		return(0);
}

short
piget(pad)
{
	register b, savemap;
	register short s;

	savemap = (int)mmap;
	b = (pad>>9)&0x7fffff;
	*(int *)mmap = b|(PG_V|PG_KR);
	mtpr(TBIS, vmmap);
	s = *(short *)&vmmap[pad&0x1ff];
	*(int *)mmap = savemap;
	mtpr(TBIS, vmmap);
	return(s);
}

piput(pad, val)
{
	register b, savemap;
	register short *p;

	savemap = (int)mmap;
	b = (pad>>9)&0x7fffff;
	*(int *)mmap = b|(PG_V|PG_KW);
	mtpr(TBIS, vmmap);
	p = (short *)&vmmap[pad&0x1ff];
	*p = val;
	*(int *)mmap = savemap;
	mtpr(TBIS, vmmap);
}
Commit	Line	Data
81263dba	1	/* hp.c 3.3 %H% */
04b9d53d BJ	2
	3	/*
	4	* RP04/RP06/RM03 disk driver
	5	*/
	6
	7	#include "../h/param.h"
	8	#include "../h/systm.h"
	9	#include "../h/buf.h"
	10	#include "../h/conf.h"
	11	#include "../h/dir.h"
	12	#include "../h/user.h"
	13	#include "../h/map.h"
	14	#include "../h/mba.h"
	15	#include "../h/mtpr.h"
	16	#include "../h/pte.h"
	17
	18	#define DK_N 0
	19
	20	struct device
	21	{
	22	int hpcs1; /* control and Status register 1 */
	23	int hpds; /* Drive Status */
	24	int hper1; /* Error register 1 */
	25	int hpmr; /* Maintenance */
	26	int hpas; /* Attention Summary */
	27	int hpda; /* Desired address register */
	28	int hpdt; /* Drive type */
	29	int hpla; /* Look ahead */
	30	int hpsn; /* serial number */
	31	int hpof; /* Offset register */
	32	int hpdc; /* Desired Cylinder address register */
	33	int hpcc; /* Current Cylinder */
	34	int hper2; /* Error register 2 */
	35	int hper3; /* Error register 3 */
	36	int hpec1; /* Burst error bit position */
	37	int hpec2; /* Burst error bit pattern */
	38	};
	39
	40	#define HPADDR ((struct device *)(MBA0 + MBA_ERB))
	41	#define NHP 1
	42	#define RP 022
	43	#define RM 024
	44	#define NSECT 22
	45	#define NTRAC 19
	46	#define NRMSECT 32
	47	#define NRMTRAC 5
	48	#define SDIST 2
	49	#define RDIST 6
	50
	51	struct size
	52	{
	53	daddr_t nblocks;
	54	int cyloff;
	55	} hp_sizes[8] =
	56	{
	57	15884, 0, /* cyl 0 thru 37 */
	58	33440, 38, /* cyl 38 thru 117 */
	59	8360, 98, /* cyl 98 thru 117 */
	60	#ifdef ERNIE
	61	15884, 118, /* cyl 118 thru 155 */
	62	66880, 156, /* cyl 156 thru 315 */
	63	0, 0,
	64	291346, 118, /* cyl 118 thru 814, (like distrib) */
	65	208582, 316, /* cyl 316 thru 814 */
66	#else
67	0, 0,
68	0, 0,
69	0, 0,
70	291346, 118, /* cyl 118 thru 814 */
71	0, 0,
72	#endif
73	}, rm_sizes[8] = {
74	15884, 0, /* cyl 0 thru 99 */
75	33440, 100, /* cyl 100 thru 309 */
76	0, 0,
77	0, 0,
78	0, 0,
79	0, 0,
80	82080, 310, /* cyl 310 thru 822 */
81	0, 0,
82	};
83
84	#define P400 020
85	#define M400 0220
86	#define P800 040
87	#define M800 0240
88	#define P1200 060
89	#define M1200 0260
90	int hp_offset[16] =
91	{
92	P400, M400, P400, M400,
93	P800, M800, P800, M800,
94	P1200, M1200, P1200, M1200,
95	0, 0, 0, 0,
96	};
97
98	struct buf hptab;
99	struct buf rhpbuf;
100	struct buf hputab[NHP];
101	char hp_type[NHP]; /* drive type */
102
103	#define GO 01
104	#define PRESET 020
105	#define RTC 016
106	#define OFFSET 014
107	#define SEARCH 030
108	#define RECAL 06
109	#define DCLR 010
110	#define WCOM 060
111	#define RCOM 070
112
113	#define IE 0100
114	#define PIP 020000
115	#define DRY 0200
116	#define ERR 040000
117	#define TRE 040000
118	#define DCK 0100000
119	#define WLE 04000
120	#define ECH 0100
121	#define VV 0100
122	#define DPR 0400
123	#define MOL 010000
124	#define FMT22 010000
125
126	#define b_cylin b_resid
127
128	#ifdef INTRLVE
129	daddr_t dkblock();
130	#endif
131
132	hpstrategy(bp)
133	register struct buf *bp;
134	{
135	register struct buf *dp;
136	register unit, xunit, nspc;
137	long sz, bn;
138	struct size *sizes;
139
140	xunit = minor(bp->b_dev) & 077;
141	sz = bp->b_bcount;
142	sz = (sz+511) >> 9;
143	unit = dkunit(bp);
144	if (hp_type[unit] == 0) {
145	struct device *hpaddr;
146
147	/* determine device type */
148	hpaddr = (struct device )((int)HPADDR + 32*unit);
149	hp_type[unit] = hpaddr->hpdt;
150	}
151	if (hp_type[unit] == RM) {
152	sizes = rm_sizes;
153	nspc = NRMSECT*NRMTRAC;
154	} else {
155	sizes = hp_sizes;
156	nspc = NSECT*NTRAC;
157	}
158	if (unit >= NHP \|\|
159	bp->b_blkno < 0 \|\|
160	(bn = dkblock(bp))+sz > sizes[xunit&07].nblocks) {
161	bp->b_flags \|= B_ERROR;
162	iodone(bp);
163	return;
164	}
165	bp->b_cylin = bn/nspc + sizes[xunit&07].cyloff;
166	dp = &hputab[unit];
81263dba	167	(void) spl5();
04b9d53d BJ	168	disksort(dp, bp);
	169	if (dp->b_active == 0) {
	170	hpustart(unit);
	171	if(hptab.b_active == 0)
	172	hpstart();
	173	}
81263dba	174	(void) spl0();
04b9d53d BJ	175	}
	176
	177	hpustart(unit)
	178	register unit;
	179	{
	180	register struct buf bp, dp;
	181	register struct device *hpaddr;
	182	daddr_t bn;
	183	int sn, cn, csn;
	184
	185	((struct mba_regs *)MBA0)->mba_cr \|= MBAIE;
	186	HPADDR->hpas = 1<<unit;
	187
	188	if(unit >= NHP)
	189	return;
	190	/*
	191	dk_busy &= ~(1<<(unit+DK_N));
	192	*/
	193	dp = &hputab[unit];
	194	if((bp=dp->b_actf) == NULL)
	195	return;
	196	hpaddr = (struct device )((int )HPADDR + 32*unit);
	197	if((hpaddr->hpds & VV) == 0) {
	198	hpaddr->hpcs1 = PRESET\|GO;
	199	hpaddr->hpof = FMT22;
	200	}
	201	if(dp->b_active)
	202	goto done;
	203	dp->b_active++;
	204	if ((hpaddr->hpds & (DPR\|MOL)) != (DPR\|MOL))
	205	goto done;
	206
	207	bn = dkblock(bp);
	208	cn = bp->b_cylin;
	209	if(hp_type[unit] == RM) {
	210	sn = bn%(NRMSECT*NRMTRAC);
	211	sn = (sn+NRMSECT-SDIST)%NRMSECT;
	212	} else {
	213	sn = bn%(NSECT*NTRAC);
	214	sn = (sn+NSECT-SDIST)%NSECT;
	215	}
	216
	217	if(cn - (hpaddr->hpdc & 0xffff))
	218	goto search;
	219	csn = ((hpaddr->hpla & 0xffff)>>6) - sn + SDIST - 1;
	220	if(csn < 0)
	221	csn += NSECT;
	222	if(csn > NSECT-RDIST)
	223	goto done;
	224
	225	search:
	226	hpaddr->hpdc = cn;
	227	hpaddr->hpda = sn;
	228	hpaddr->hpcs1 = SEARCH\|GO;
	229	/*
	230	unit += DK_N;
	231	dk_busy \|= 1<<unit;
	232	dk_numb[unit] += 1;
	233	*/
	234	return;
	235
	236	done:
	237	dp->b_forw = NULL;
	238	if(hptab.b_actf == NULL)
239	hptab.b_actf = dp; else
240	hptab.b_actl->b_forw = dp;
241	hptab.b_actl = dp;
242	}
243
244	hpstart()
245	{
246	register struct buf bp, dp;
247	register unit;
248	register struct device *hpaddr;
249	daddr_t bn;
250	int dn, sn, tn, cn, nspc, ns;
251
252	loop:
253	if ((dp = hptab.b_actf) == NULL)
254	return;
255	if ((bp = dp->b_actf) == NULL) {
256	hptab.b_actf = dp->b_forw;
257	goto loop;
258	}
259	hptab.b_active++;
260	unit = minor(bp->b_dev) & 077;
261	dn = dkunit(bp);
262	bn = dkblock(bp);
263	if (hp_type[dn] == RM) {
264	nspc = NRMSECT*NRMTRAC;
265	ns = NRMSECT;
266	cn = rm_sizes[unit&07].cyloff;
267	} else {
268	nspc = NSECT*NTRAC;
269	ns = NSECT;
270	cn = hp_sizes[unit&07].cyloff;
271	}
272	cn += bn/nspc;
273	sn = bn%nspc;
274	tn = sn/ns;
275	sn = sn%ns;
276
277	hpaddr = (struct device )((int )HPADDR + 32*dn);
278	if ((hpaddr->hpds & (DPR\|MOL)) != (DPR\|MOL)) {
279	hptab.b_active = 0;
280	hptab.b_errcnt = 0;
281	dp->b_actf = bp->av_forw;
282	bp->b_flags \|= B_ERROR;
283	iodone(bp);
284	goto loop;
285	}
286	if(hptab.b_errcnt >= 16) {
287	hpaddr->hpof = hp_offset[hptab.b_errcnt & 017] \| FMT22;
288	((struct mba_regs *)MBA0)->mba_cr &= ~MBAIE;
289	hpaddr->hpcs1 = OFFSET\|GO;
290	while(hpaddr->hpds & PIP)
291	;
292	((struct mba_regs *)MBA0)->mba_cr \|= MBAIE;
293	}
294	hpaddr->hpdc = cn;
295	hpaddr->hpda = (tn << 8) + sn;
296	mbastart(bp, (int *)hpaddr);
297
298	dk_busy \|= 1<<(DK_N /+NHP/);
299	dk_numb[DK_N /+NHP/] += 1;
300	unit = bp->b_bcount>>6;
301	dk_wds[DK_N /+NHP/] += unit;
302	}
303
304	hpintr(mbastat, as)
305	{
306	register struct buf bp, dp;
307	register unit;
308	register struct device *hpaddr;
309
310	if(hptab.b_active) {
311	dk_busy &= ~(1<<(DK_N /+NHP/));
312	dp = hptab.b_actf;
313	bp = dp->b_actf;
314	unit = dkunit(bp);
315	hpaddr = (struct device )((int )HPADDR + 32*unit);
316	if (hpaddr->hpds & ERR \|\| mbastat & MBAEBITS) { /* error bit */
317	while((hpaddr->hpds & DRY) == 0)
318	;
319	if(++hptab.b_errcnt > 28 \|\| hpaddr->hper1&WLE)
320	bp->b_flags \|= B_ERROR; else
321	hptab.b_active = 0;
322	if(hptab.b_errcnt > 27)
323	deverror(bp, mbastat, hpaddr->hper1);
324	if ((hpaddr->hper1&0xffff) == DCK) {
325	if (hpecc(hpaddr, bp))
326	return;
327	}
328	hpaddr->hpcs1 = DCLR\|GO;
329	if((hptab.b_errcnt&07) == 4) {
330	((struct mba_regs *)MBA0)->mba_cr &= ~MBAIE;
331	hpaddr->hpcs1 = RECAL\|GO;
332	while(hpaddr->hpds & PIP)
333	;
334	((struct mba_regs *)MBA0)->mba_cr \|= MBAIE;
335	}
336	}
337	if(hptab.b_active) {
338	if(hptab.b_errcnt) {
339	((struct mba_regs *)MBA0)->mba_cr &= ~MBAIE;
340	hpaddr->hpcs1 = RTC\|GO;
341	while(hpaddr->hpds & PIP)
342	;
343	((struct mba_regs *)MBA0)->mba_cr \|= MBAIE;
344	}
345	hptab.b_active = 0;
346	hptab.b_errcnt = 0;
347	hptab.b_actf = dp->b_forw;
348	dp->b_active = 0;
349	dp->b_errcnt = 0;
350	dp->b_actf = bp->av_forw;
351	bp->b_resid = -(((struct mba_regs *)MBA0)->mba_bcr) & 0xffff;
352	iodone(bp);
353	if(dp->b_actf)
354	hpustart(unit);
355	}
356	as &= ~(1<<unit);
357	} else {
358	if(as == 0)
359	((struct mba_regs *)MBA0)->mba_cr \|= MBAIE;
360	}
361	for(unit=0; unit<NHP; unit++)
362	if(as & (1<<unit))
363	hpustart(unit);
364	hpstart();
365	}
366
367	hpread(dev)
368	{
369
370	physio(hpstrategy, &rhpbuf, dev, B_READ, minphys);
371	}
372
373	hpwrite(dev)
374	{
375
376	physio(hpstrategy, &rhpbuf, dev, B_WRITE, minphys);
377	}
378
379	hpecc(rp, bp)
380	register struct device *rp;
381	register struct buf *bp;
382	{
383	register i;
384	register b, n, map, mix;
385	register char *cp;
386	register mask;
387	short piget();
5f3edb0e	388	extern char buffers[NBUF][BSIZE];
04b9d53d BJ	389
	390	b = (((((struct mba_regs *)MBA0)->mba_bcr&0xffff) +
	391	(bp->b_bcount) - 1)>>9)&0177;
	392	printf("%D ", bp->b_blkno+b);
	393	prdev("ECC", bp->b_dev);
	394	mask = rp->hpec2&0xffff;
	395	if (mask == 0) {
	396	rp->hpof = FMT22;
	397	return(0);
	398	}
	399	i = (rp->hpec1&0xffff) - 1;
	400	n = i&017;
	401	i = (i&~017)>>3;
	402	if (bp->b_flags&B_PHYS)
	403	map = 128 + b;
	404	else
	405	map = ((bp->b_un.b_addr - (char *)buffers)>>9) + b;
	406	mix = i + ((int)bp->b_un.b_addr&0x1ff);
	407	i += b<<9;
	408	if ( i < bp->b_bcount) {
	409	cp = (char )((((int )MBA0_MAP)[map+(mix>>9)]&0x1fffff)<<9)+(mix&0x1ff);
	410	piput((int)cp,piget((int)cp)^(mask<<n));
	411	}
	412	mix += 2;
	413	i += 2;
	414	if (i < bp->b_bcount) {
	415	cp = (char )((((int )MBA0_MAP)[map+(mix>>9)]&0x1fffff)<<9)+(mix&0x1ff);
	416	piput((int)cp,piget((int)cp)^(mask>>(16-n)));
	417	}
	418	hptab.b_active++;
	419	if (((struct mba_regs *)MBA0)->mba_bcr) {
	420	i = bp->b_blkno%(NSECT*NTRAC);
	421	i = ((i/NSECT)<<8)+(i%NSECT);
	422	i = NSECT*(i>>8) + (i&0377) + b + 1;
	423	if (i >= NSECT*NTRAC) {
	424	i -= NSECT*NTRAC;
	425	rp->hpdc = bp->b_cylin + 1;
	426	} else
	427	rp->hpdc = bp->b_cylin;
	428	rp->hpda = ((i/NSECT)<<8) + (i%NSECT);
	429	rp->hpcs1 = DCLR\|GO;
	430	((struct mba_regs *)MBA0)->mba_sr = -1;
	431	((struct mba_regs *)MBA0)->mba_var =
	432	((map+1)<<9)\|((int)bp->b_un.b_addr&0x1ff);
	433	rp->hpcs1 = RCOM\|GO;
	434	return(1);
	435	} else
	436	return(0);
	437	}
	438
	439	short
	440	piget(pad)
	441	{
	442	register b, savemap;
	443	register short s;
	444
	445	savemap = (int)mmap;
	446	b = (pad>>9)&0x7fffff;
	447	(int )mmap = b\|(PG_V\|PG_KR);
	448	mtpr(TBIS, vmmap);
	449	s = (short )&vmmap[pad&0x1ff];
	450	(int )mmap = savemap;
	451	mtpr(TBIS, vmmap);
	452	return(s);
453	}
454
455	piput(pad, val)
456	{
457	register b, savemap;
458	register short *p;
459
460	savemap = (int)mmap;
461	b = (pad>>9)&0x7fffff;
462	(int )mmap = b\|(PG_V\|PG_KW);
463	mtpr(TBIS, vmmap);
464	p = (short *)&vmmap[pad&0x1ff];
465	*p = val;
466	(int )mmap = savemap;
467	mtpr(TBIS, vmmap);
468	}