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1.1 ! root 1: /* ht.c 6.2 83/09/26 */ ! 2: ! 3: #include "tu.h" ! 4: #if NHT > 0 ! 5: /* ! 6: * TM03/TU?? tape driver ! 7: * ! 8: * TODO: ! 9: * cleanup messages on errors ! 10: * test ioctl's ! 11: * see how many rewind interrups we get if we kick when not at BOT ! 12: * fixup rle error on block tape code ! 13: */ ! 14: #include "../machine/pte.h" ! 15: ! 16: #include "../h/param.h" ! 17: #include "../h/systm.h" ! 18: #include "../h/buf.h" ! 19: #include "../h/conf.h" ! 20: #include "../h/dir.h" ! 21: #include "../h/file.h" ! 22: #include "../h/user.h" ! 23: #include "../h/map.h" ! 24: #include "../h/ioctl.h" ! 25: #include "../h/mtio.h" ! 26: #include "../h/cmap.h" ! 27: #include "../h/uio.h" ! 28: ! 29: #include "../vax/cpu.h" ! 30: #include "../vaxmba/mbareg.h" ! 31: #include "../vaxmba/mbavar.h" ! 32: #include "../vaxmba/htreg.h" ! 33: ! 34: struct buf rhtbuf[NHT]; ! 35: struct buf chtbuf[NHT]; ! 36: ! 37: short httypes[] = ! 38: { MBDT_TM03, MBDT_TE16, MBDT_TU45, MBDT_TU77, 0 }; ! 39: struct mba_device *htinfo[NHT]; ! 40: int htattach(), htslave(), htustart(), htndtint(), htdtint(); ! 41: struct mba_driver htdriver = ! 42: { htattach, htslave, htustart, 0, htdtint, htndtint, ! 43: httypes, "ht", "tu", htinfo }; ! 44: ! 45: #define MASKREG(r) ((r) & 0xffff) ! 46: ! 47: /* bits in minor device */ ! 48: #define TUUNIT(dev) (minor(dev)&03) ! 49: #define H_NOREWIND 04 ! 50: #define H_1600BPI 08 ! 51: ! 52: #define HTUNIT(dev) (tutoht[TUUNIT(dev)]) ! 53: ! 54: #define INF (daddr_t)1000000L /* a block number that wont exist */ ! 55: ! 56: struct tu_softc { ! 57: char sc_openf; ! 58: char sc_flags; ! 59: daddr_t sc_blkno; ! 60: daddr_t sc_nxrec; ! 61: u_short sc_erreg; ! 62: u_short sc_dsreg; ! 63: short sc_resid; ! 64: short sc_dens; ! 65: struct mba_device *sc_mi; ! 66: int sc_slave; ! 67: } tu_softc[NTU]; ! 68: short tutoht[NTU]; ! 69: ! 70: /* ! 71: * Bits for sc_flags. ! 72: */ ! 73: #define H_WRITTEN 1 /* last operation was a write */ ! 74: #define H_ERASED 2 /* last write retry was an erase gap */ ! 75: #define H_REWIND 4 /* last unit start was a rewind */ ! 76: ! 77: char hter_bits[] = HTER_BITS; ! 78: char htds_bits[] = HTDS_BITS; ! 79: ! 80: /*ARGSUSED*/ ! 81: htattach(mi) ! 82: struct mba_device *mi; ! 83: { ! 84: ! 85: } ! 86: ! 87: htslave(mi, ms, sn) ! 88: struct mba_device *mi; ! 89: struct mba_slave *ms; ! 90: int sn; ! 91: { ! 92: register struct tu_softc *sc = &tu_softc[ms->ms_unit]; ! 93: register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv; ! 94: ! 95: htaddr->httc = sn; ! 96: if (htaddr->htdt & HTDT_SPR) { ! 97: sc->sc_mi = mi; ! 98: sc->sc_slave = sn; ! 99: tutoht[ms->ms_unit] = mi->mi_unit; ! 100: return (1); ! 101: } else ! 102: return (0); ! 103: } ! 104: ! 105: htopen(dev, flag) ! 106: dev_t dev; ! 107: int flag; ! 108: { ! 109: register int tuunit; ! 110: register struct mba_device *mi; ! 111: register struct tu_softc *sc; ! 112: int olddens, dens; ! 113: ! 114: tuunit = TUUNIT(dev); ! 115: if (tuunit >= NTU || (sc = &tu_softc[tuunit])->sc_openf || ! 116: (mi = htinfo[HTUNIT(dev)]) == 0 || mi->mi_alive == 0) ! 117: return (ENXIO); ! 118: olddens = sc->sc_dens; ! 119: dens = sc->sc_dens = ! 120: ((minor(dev)&H_1600BPI)?HTTC_1600BPI:HTTC_800BPI)| ! 121: HTTC_PDP11|sc->sc_slave; ! 122: htcommand(dev, HT_SENSE, 1); ! 123: sc->sc_dens = olddens; ! 124: if ((sc->sc_dsreg & HTDS_MOL) == 0) { ! 125: uprintf("tu%d: not online\n", tuunit); ! 126: return (EIO); ! 127: } ! 128: if ((flag&FWRITE) && (sc->sc_dsreg&HTDS_WRL)) { ! 129: uprintf("tu%d: no write ring\n", tuunit); ! 130: return (EIO); ! 131: } ! 132: if ((sc->sc_dsreg & HTDS_BOT) == 0 && (flag&FWRITE) && ! 133: dens != sc->sc_dens) { ! 134: uprintf("tu%d: can't change density in mid-tape\n", tuunit); ! 135: return (EIO); ! 136: } ! 137: sc->sc_openf = 1; ! 138: sc->sc_blkno = (daddr_t)0; ! 139: sc->sc_nxrec = INF; ! 140: sc->sc_flags = 0; ! 141: sc->sc_dens = dens; ! 142: return (0); ! 143: } ! 144: ! 145: htclose(dev, flag) ! 146: register dev_t dev; ! 147: register flag; ! 148: { ! 149: register struct tu_softc *sc = &tu_softc[TUUNIT(dev)]; ! 150: ! 151: if (flag == FWRITE || ((flag&FWRITE) && (sc->sc_flags&H_WRITTEN))) { ! 152: htcommand(dev, HT_WEOF, 1); ! 153: htcommand(dev, HT_WEOF, 1); ! 154: htcommand(dev, HT_SREV, 1); ! 155: } ! 156: if ((minor(dev)&H_NOREWIND) == 0) ! 157: htcommand(dev, HT_REW, 0); ! 158: sc->sc_openf = 0; ! 159: } ! 160: ! 161: htcommand(dev, com, count) ! 162: dev_t dev; ! 163: int com, count; ! 164: { ! 165: register struct buf *bp; ! 166: register int s; ! 167: ! 168: bp = &chtbuf[HTUNIT(dev)]; ! 169: s = spl5(); ! 170: while (bp->b_flags&B_BUSY) { ! 171: if(bp->b_repcnt == 0 && (bp->b_flags&B_DONE)) ! 172: break; ! 173: bp->b_flags |= B_WANTED; ! 174: sleep((caddr_t)bp, PRIBIO); ! 175: } ! 176: bp->b_flags = B_BUSY|B_READ; ! 177: splx(s); ! 178: bp->b_dev = dev; ! 179: bp->b_command = com; ! 180: bp->b_repcnt = count; ! 181: bp->b_blkno = 0; ! 182: htstrategy(bp); ! 183: if (count == 0) ! 184: return; ! 185: iowait(bp); ! 186: if (bp->b_flags&B_WANTED) ! 187: wakeup((caddr_t)bp); ! 188: bp->b_flags &= B_ERROR; ! 189: } ! 190: ! 191: htstrategy(bp) ! 192: register struct buf *bp; ! 193: { ! 194: register struct mba_device *mi = htinfo[HTUNIT(bp->b_dev)]; ! 195: register struct buf *dp; ! 196: register int s; ! 197: ! 198: bp->av_forw = NULL; ! 199: dp = &mi->mi_tab; ! 200: s = spl5(); ! 201: if (dp->b_actf == NULL) ! 202: dp->b_actf = bp; ! 203: else ! 204: dp->b_actl->av_forw = bp; ! 205: dp->b_actl = bp; ! 206: if (dp->b_active == 0) ! 207: mbustart(mi); ! 208: splx(s); ! 209: } ! 210: ! 211: htustart(mi) ! 212: register struct mba_device *mi; ! 213: { ! 214: register struct htdevice *htaddr = ! 215: (struct htdevice *)mi->mi_drv; ! 216: register struct buf *bp = mi->mi_tab.b_actf; ! 217: register struct tu_softc *sc = &tu_softc[TUUNIT(bp->b_dev)]; ! 218: daddr_t blkno; ! 219: ! 220: htaddr->httc = sc->sc_dens; ! 221: #ifdef notdef ! 222: /* unneeded, may hang controller */ ! 223: if (bp == &chtbuf[HTUNIT(bp->b_dev)] && bp->b_command == HT_SENSE) { ! 224: htaddr->htcs1 = HT_SENSE|HT_GO; ! 225: mbclrattn(mi); ! 226: } ! 227: #endif ! 228: sc->sc_dsreg = htaddr->htds; ! 229: sc->sc_erreg = htaddr->hter; ! 230: sc->sc_resid = htaddr->htfc; ! 231: sc->sc_flags &= ~(H_WRITTEN|H_REWIND); ! 232: if ((htaddr->htdt & HTDT_SPR) == 0 || (htaddr->htds & HTDS_MOL) == 0) ! 233: if (sc->sc_openf > 0) ! 234: sc->sc_openf = -1; ! 235: if (sc->sc_openf < 0) { ! 236: bp->b_flags |= B_ERROR; ! 237: return (MBU_NEXT); ! 238: } ! 239: if (bp != &chtbuf[HTUNIT(bp->b_dev)]) { ! 240: if (bdbtofsb(bp->b_blkno) > sc->sc_nxrec) { ! 241: bp->b_flags |= B_ERROR; ! 242: bp->b_error = ENXIO; ! 243: return (MBU_NEXT); ! 244: } ! 245: if (bdbtofsb(bp->b_blkno) == sc->sc_nxrec && ! 246: bp->b_flags&B_READ) { ! 247: bp->b_resid = bp->b_bcount; ! 248: clrbuf(bp); ! 249: return (MBU_NEXT); ! 250: } ! 251: if ((bp->b_flags&B_READ)==0) ! 252: sc->sc_nxrec = bdbtofsb(bp->b_blkno) + 1; ! 253: } else { ! 254: if (bp->b_command == HT_SENSE) ! 255: return (MBU_NEXT); ! 256: if (bp->b_command == HT_REW) ! 257: sc->sc_flags |= H_REWIND; ! 258: else ! 259: htaddr->htfc = -bp->b_bcount; ! 260: htaddr->htcs1 = bp->b_command|HT_GO; ! 261: return (MBU_STARTED); ! 262: } ! 263: if ((blkno = sc->sc_blkno) == bdbtofsb(bp->b_blkno)) { ! 264: htaddr->htfc = -bp->b_bcount; ! 265: if ((bp->b_flags&B_READ) == 0) { ! 266: if (mi->mi_tab.b_errcnt) { ! 267: if ((sc->sc_flags & H_ERASED) == 0) { ! 268: sc->sc_flags |= H_ERASED; ! 269: htaddr->htcs1 = HT_ERASE | HT_GO; ! 270: return (MBU_STARTED); ! 271: } ! 272: sc->sc_flags &= ~H_ERASED; ! 273: } ! 274: if (htaddr->htds & HTDS_EOT) { ! 275: bp->b_resid = bp->b_bcount; ! 276: bp->b_flags |= B_ERROR; ! 277: return (MBU_NEXT); ! 278: } ! 279: } ! 280: return (MBU_DODATA); ! 281: } ! 282: if (blkno < bdbtofsb(bp->b_blkno)) { ! 283: htaddr->htfc = blkno - bdbtofsb(bp->b_blkno); ! 284: htaddr->htcs1 = HT_SFORW|HT_GO; ! 285: } else { ! 286: htaddr->htfc = bdbtofsb(bp->b_blkno) - blkno; ! 287: htaddr->htcs1 = HT_SREV|HT_GO; ! 288: } ! 289: return (MBU_STARTED); ! 290: } ! 291: ! 292: htdtint(mi, mbsr) ! 293: register struct mba_device *mi; ! 294: int mbsr; ! 295: { ! 296: register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv; ! 297: register struct buf *bp = mi->mi_tab.b_actf; ! 298: register struct tu_softc *sc; ! 299: int ds, er, mbs; ! 300: ! 301: sc = &tu_softc[TUUNIT(bp->b_dev)]; ! 302: ds = sc->sc_dsreg = MASKREG(htaddr->htds); ! 303: er = sc->sc_erreg = MASKREG(htaddr->hter); ! 304: sc->sc_resid = MASKREG(htaddr->htfc); ! 305: mbs = mbsr; ! 306: sc->sc_blkno++; ! 307: if((bp->b_flags & B_READ) == 0) ! 308: sc->sc_flags |= H_WRITTEN; ! 309: if ((ds&(HTDS_ERR|HTDS_MOL)) != HTDS_MOL || mbs & MBSR_EBITS) { ! 310: htaddr->htcs1 = HT_DCLR|HT_GO; ! 311: mbclrattn(mi); ! 312: if (bp == &rhtbuf[HTUNIT(bp->b_dev)]) { ! 313: er &= ~HTER_FCE; ! 314: mbs &= ~(MBSR_DTABT|MBSR_MBEXC); ! 315: } ! 316: if (bp->b_flags & B_READ && ds & HTDS_PES) ! 317: er &= ~(HTER_CSITM|HTER_CORCRC); ! 318: if (er&HTER_HARD || mbs&MBSR_EBITS || (ds&HTDS_MOL) == 0 || ! 319: er && ++mi->mi_tab.b_errcnt >= 7) { ! 320: if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0) ! 321: sc->sc_openf = -1; ! 322: if ((er&HTER_HARD) == HTER_FCE && ! 323: (mbs&MBSR_EBITS) == (MBSR_DTABT|MBSR_MBEXC) && ! 324: (ds&HTDS_MOL)) ! 325: goto noprint; ! 326: printf("tu%d: hard error bn%d mbsr=%b er=%b ds=%b\n", ! 327: TUUNIT(bp->b_dev), bp->b_blkno, ! 328: mbsr, mbsr_bits, ! 329: sc->sc_erreg, hter_bits, ! 330: sc->sc_dsreg, htds_bits); ! 331: noprint: ! 332: bp->b_flags |= B_ERROR; ! 333: return (MBD_DONE); ! 334: } ! 335: if (er) ! 336: return (MBD_RETRY); ! 337: } ! 338: bp->b_resid = 0; ! 339: if (bp->b_flags & B_READ) ! 340: if (ds&HTDS_TM) { /* must be a read, right? */ ! 341: bp->b_resid = bp->b_bcount; ! 342: sc->sc_nxrec = bdbtofsb(bp->b_blkno); ! 343: } else if(bp->b_bcount > MASKREG(htaddr->htfc)) ! 344: bp->b_resid = bp->b_bcount - MASKREG(htaddr->htfc); ! 345: return (MBD_DONE); ! 346: } ! 347: ! 348: htndtint(mi) ! 349: register struct mba_device *mi; ! 350: { ! 351: register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv; ! 352: register struct buf *bp = mi->mi_tab.b_actf; ! 353: register struct tu_softc *sc; ! 354: int er, ds, fc; ! 355: ! 356: ds = MASKREG(htaddr->htds); ! 357: er = MASKREG(htaddr->hter); ! 358: fc = MASKREG(htaddr->htfc); ! 359: if (er) { ! 360: htaddr->htcs1 = HT_DCLR|HT_GO; ! 361: mbclrattn(mi); ! 362: } ! 363: if (bp == 0) ! 364: return (MBN_SKIP); ! 365: sc = &tu_softc[TUUNIT(bp->b_dev)]; ! 366: sc->sc_dsreg = ds; ! 367: sc->sc_erreg = er; ! 368: sc->sc_resid = fc; ! 369: if (bp == &chtbuf[HTUNIT(bp->b_dev)]) { ! 370: switch (bp->b_command) { ! 371: case HT_REWOFFL: ! 372: /* offline is on purpose; don't do anything special */ ! 373: ds |= HTDS_MOL; ! 374: break; ! 375: case HT_SREV: ! 376: /* if backspace file hit bot, its not an error */ ! 377: if (er == (HTER_NEF|HTER_FCE) && ds&HTDS_BOT && ! 378: bp->b_repcnt == INF) ! 379: er &= ~HTER_NEF; ! 380: break; ! 381: } ! 382: er &= ~HTER_FCE; ! 383: if (er == 0) ! 384: ds &= ~HTDS_ERR; ! 385: } ! 386: if ((ds & (HTDS_ERR|HTDS_MOL)) != HTDS_MOL) { ! 387: if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0) ! 388: sc->sc_openf = -1; ! 389: printf("tu%d: hard error bn%d er=%b ds=%b\n", ! 390: TUUNIT(bp->b_dev), bp->b_blkno, ! 391: sc->sc_erreg, hter_bits, sc->sc_dsreg, htds_bits); ! 392: bp->b_flags |= B_ERROR; ! 393: return (MBN_DONE); ! 394: } ! 395: if (bp == &chtbuf[HTUNIT(bp->b_dev)]) { ! 396: if (sc->sc_flags & H_REWIND) ! 397: return (ds & HTDS_BOT ? MBN_DONE : MBN_RETRY); ! 398: bp->b_resid = -sc->sc_resid; ! 399: return (MBN_DONE); ! 400: } ! 401: if (ds & HTDS_TM) ! 402: if (sc->sc_blkno > bdbtofsb(bp->b_blkno)) { ! 403: sc->sc_nxrec = bdbtofsb(bp->b_blkno) - fc; ! 404: sc->sc_blkno = sc->sc_nxrec; ! 405: } else { ! 406: sc->sc_blkno = bdbtofsb(bp->b_blkno) + fc; ! 407: sc->sc_nxrec = sc->sc_blkno - 1; ! 408: } ! 409: else ! 410: sc->sc_blkno = bdbtofsb(bp->b_blkno); ! 411: return (MBN_RETRY); ! 412: } ! 413: ! 414: htread(dev, uio) ! 415: dev_t dev; ! 416: struct uio *uio; ! 417: { ! 418: int errno; ! 419: ! 420: errno = htphys(dev, uio); ! 421: if (errno) ! 422: return (errno); ! 423: return (physio(htstrategy, &rhtbuf[HTUNIT(dev)], dev, B_READ, minphys, uio)); ! 424: } ! 425: ! 426: htwrite(dev, uio) ! 427: dev_t dev; ! 428: struct uio *uio; ! 429: { ! 430: int errno; ! 431: ! 432: errno = htphys(dev, uio); ! 433: if (errno) ! 434: return (errno); ! 435: return (physio(htstrategy, &rhtbuf[HTUNIT(dev)], dev, B_WRITE, minphys, uio)); ! 436: } ! 437: ! 438: htphys(dev, uio) ! 439: dev_t dev; ! 440: struct uio *uio; ! 441: { ! 442: register int htunit; ! 443: register struct tu_softc *sc; ! 444: register struct mba_device *mi; ! 445: daddr_t a; ! 446: ! 447: htunit = HTUNIT(dev); ! 448: if (htunit >= NHT || (mi = htinfo[htunit]) == 0 || mi->mi_alive == 0) ! 449: return (ENXIO); ! 450: a = uio->uio_offset >> 9; ! 451: sc = &tu_softc[TUUNIT(dev)]; ! 452: sc->sc_blkno = bdbtofsb(a); ! 453: sc->sc_nxrec = bdbtofsb(a)+1; ! 454: return (0); ! 455: } ! 456: ! 457: /*ARGSUSED*/ ! 458: htioctl(dev, cmd, data, flag) ! 459: dev_t dev; ! 460: int cmd; ! 461: caddr_t data; ! 462: int flag; ! 463: { ! 464: register struct tu_softc *sc = &tu_softc[TUUNIT(dev)]; ! 465: register struct buf *bp = &chtbuf[HTUNIT(dev)]; ! 466: register callcount; ! 467: int fcount; ! 468: struct mtop *mtop; ! 469: struct mtget *mtget; ! 470: /* we depend of the values and order of the MT codes here */ ! 471: static htops[] = ! 472: {HT_WEOF,HT_SFORW,HT_SREV,HT_SFORW,HT_SREV,HT_REW,HT_REWOFFL,HT_SENSE}; ! 473: ! 474: switch (cmd) { ! 475: ! 476: case MTIOCTOP: /* tape operation */ ! 477: mtop = (struct mtop *)data; ! 478: switch (mtop->mt_op) { ! 479: ! 480: case MTWEOF: ! 481: callcount = mtop->mt_count; ! 482: fcount = 1; ! 483: break; ! 484: ! 485: case MTFSF: case MTBSF: ! 486: callcount = mtop->mt_count; ! 487: fcount = INF; ! 488: break; ! 489: ! 490: case MTFSR: case MTBSR: ! 491: callcount = 1; ! 492: fcount = mtop->mt_count; ! 493: break; ! 494: ! 495: case MTREW: case MTOFFL: ! 496: callcount = 1; ! 497: fcount = 1; ! 498: break; ! 499: ! 500: default: ! 501: return (ENXIO); ! 502: } ! 503: if (callcount <= 0 || fcount <= 0) ! 504: return (EINVAL); ! 505: while (--callcount >= 0) { ! 506: htcommand(dev, htops[mtop->mt_op], fcount); ! 507: if ((mtop->mt_op == MTFSR || mtop->mt_op == MTBSR) && ! 508: bp->b_resid) ! 509: return (EIO); ! 510: if ((bp->b_flags&B_ERROR) || sc->sc_dsreg&HTDS_BOT) ! 511: break; ! 512: } ! 513: return (geterror(bp)); ! 514: ! 515: case MTIOCGET: ! 516: mtget = (struct mtget *)data; ! 517: mtget->mt_dsreg = sc->sc_dsreg; ! 518: mtget->mt_erreg = sc->sc_erreg; ! 519: mtget->mt_resid = sc->sc_resid; ! 520: mtget->mt_type = MT_ISHT; ! 521: break; ! 522: ! 523: default: ! 524: return (ENXIO); ! 525: } ! 526: return (0); ! 527: } ! 528: ! 529: #define DBSIZE 20 ! 530: ! 531: htdump() ! 532: { ! 533: register struct mba_device *mi; ! 534: register struct mba_regs *mp; ! 535: register struct htdevice *htaddr; ! 536: int blk, num; ! 537: int start; ! 538: ! 539: start = 0; ! 540: num = maxfree; ! 541: #define phys(a,b) ((b)((int)(a)&0x7fffffff)) ! 542: if (htinfo[0] == 0) ! 543: return (ENXIO); ! 544: mi = phys(htinfo[0], struct mba_device *); ! 545: mp = phys(mi->mi_hd, struct mba_hd *)->mh_physmba; ! 546: mp->mba_cr = MBCR_IE; ! 547: htaddr = (struct htdevice *)&mp->mba_drv[mi->mi_drive]; ! 548: htaddr->httc = HTTC_PDP11|HTTC_1600BPI; ! 549: htaddr->htcs1 = HT_DCLR|HT_GO; ! 550: while (num > 0) { ! 551: blk = num > DBSIZE ? DBSIZE : num; ! 552: htdwrite(start, blk, htaddr, mp); ! 553: start += blk; ! 554: num -= blk; ! 555: } ! 556: hteof(htaddr); ! 557: hteof(htaddr); ! 558: htwait(htaddr); ! 559: if (htaddr->htds&HTDS_ERR) ! 560: return (EIO); ! 561: htaddr->htcs1 = HT_REW|HT_GO; ! 562: return (0); ! 563: } ! 564: ! 565: htdwrite(dbuf, num, htaddr, mp) ! 566: register dbuf, num; ! 567: register struct htdevice *htaddr; ! 568: struct mba_regs *mp; ! 569: { ! 570: register struct pte *io; ! 571: register int i; ! 572: ! 573: htwait(htaddr); ! 574: io = mp->mba_map; ! 575: for (i = 0; i < num; i++) ! 576: *(int *)io++ = dbuf++ | PG_V; ! 577: htaddr->htfc = -(num*NBPG); ! 578: mp->mba_sr = -1; ! 579: mp->mba_bcr = -(num*NBPG); ! 580: mp->mba_var = 0; ! 581: htaddr->htcs1 = HT_WCOM|HT_GO; ! 582: } ! 583: ! 584: htwait(htaddr) ! 585: struct htdevice *htaddr; ! 586: { ! 587: register s; ! 588: ! 589: do ! 590: s = htaddr->htds; ! 591: while ((s & HTDS_DRY) == 0); ! 592: } ! 593: ! 594: hteof(htaddr) ! 595: struct htdevice *htaddr; ! 596: { ! 597: ! 598: htwait(htaddr); ! 599: htaddr->htcs1 = HT_WEOF|HT_GO; ! 600: } ! 601: #endif
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