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[unix-history] / usr / src / sys / vax / mba / hp.c
/* hp.c 3.5 %G% */
/*
* RP04/RP06/RM03 disk driver
*/
#include "../h/param.h"
#include "../h/systm.h"
#include "../h/dk.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 _hpSDIST 3
#define _hpRDIST 6
int hpSDIST = _hpSDIST;
int hpRDIST = _hpRDIST;
int hpseek;
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 SEEK 04
#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-hpSDIST)%NRMSECT;
} else {
sn = bn%(NSECT*NTRAC);
sn = (sn+NSECT-hpSDIST)%NSECT;
}
if(cn - (hpaddr->hpdc & 0xffff))
goto search;
else if (hpseek)
goto done;
csn = ((hpaddr->hpla & 0xffff)>>6) - sn + 1;
if(csn < 0)
csn += NSECT;
if(csn > NSECT-hpRDIST)
goto done;
search:
hpaddr->hpdc = cn;
if (hpseek)
hpaddr->hpcs1 = SEEK|GO;
else {
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);
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.