1 /* 2 * Copyright (c) 1982, 1986 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 * 6 * @(#)rk.c 7.1 (Berkeley) 06/05/86 7 */ 8 9 /* 10 * RK611/RK07 11 */ 12 #include "../machine/pte.h" 13 14 #include "../h/param.h" 15 #include "../h/inode.h" 16 #include "../h/fs.h" 17 18 #include "../vaxuba/ubareg.h" 19 #include "../vaxuba/rkreg.h" 20 21 #include "saio.h" 22 #include "savax.h" 23 24 u_short rkstd[] = { 0777440 }; 25 short rk_off[] = { 0, 241, 0, -1, -1, -1, 393, -1 }; 26 27 rkopen(io) 28 register struct iob *io; 29 { 30 register struct rkdevice *rkaddr = (struct rkdevice *)ubamem(io->i_unit, rkstd[0]); 31 32 if (rk_off[io->i_boff] == -1 || 33 io->i_boff < 0 || io->i_boff > 7) 34 _stop("rk bad unit"); 35 io->i_boff = rk_off[io->i_boff] * NRKSECT*NRKTRK; 36 rkaddr->rkcs2 = RKCS2_SCLR; 37 rkwait(rkaddr); 38 } 39 40 rkstrategy(io, func) 41 register struct iob *io; 42 { 43 register struct rkdevice *rkaddr = (struct rkdevice *)ubamem(io->i_unit, rkstd[0]); 44 int com; 45 daddr_t bn; 46 short dn, cn, sn, tn; 47 int ubinfo, errcnt = 0; 48 49 retry: 50 ubinfo = ubasetup(io, 1); 51 bn = io->i_bn; 52 dn = io->i_unit; 53 cn = bn/(NRKSECT*NRKTRK); 54 sn = bn%NRKSECT; 55 tn = (bn / NRKSECT) % NRKTRK; 56 rkaddr->rkcs2 = dn; 57 rkaddr->rkcs1 = RK_CDT|RK_PACK|RK_GO; 58 rkwait(rkaddr); 59 rkaddr->rkcs1 = RK_CDT|RK_DCLR|RK_GO; 60 rkwait(rkaddr); 61 rkaddr->rkda = sn | (tn << 8); 62 rkaddr->rkcyl = cn; 63 rkaddr->rkba = ubinfo; 64 rkaddr->rkwc = -(io->i_cc >> 1); 65 com = RK_CDT|((ubinfo>>8)&0x300)|RK_GO; 66 if (func == READ) 67 com |= RK_READ; 68 else 69 com |= RK_WRITE; 70 rkaddr->rkcs1 = com; 71 rkwait(rkaddr); 72 while ((rkaddr->rkds & RKDS_SVAL) == 0) 73 ; 74 ubafree(io, ubinfo); 75 if (rkaddr->rkcs1 & RK_CERR) { 76 printf("rk error: (cyl,trk,sec)=(%d,%d,%d) cs2=%b er=%b\n", 77 cn, tn, sn, rkaddr->rkcs2, RKCS2_BITS, 78 rkaddr->rker, RKER_BITS); 79 rkaddr->rkcs1 = RK_CDT|RK_DCLR|RK_GO; 80 rkwait(rkaddr); 81 if (errcnt == 10) { 82 printf("rk: unrecovered error\n"); 83 return (-1); 84 } 85 errcnt++; 86 goto retry; 87 } 88 if (errcnt) 89 printf("rk: recovered by retry\n"); 90 return (io->i_cc); 91 } 92 93 rkwait(rkaddr) 94 register struct rkdevice *rkaddr; 95 { 96 97 while ((rkaddr->rkcs1 & RK_CRDY) == 0) 98 ; 99 } 100 101 /*ARGSUSED*/ 102 rkioctl(io, cmd, arg) 103 struct iob *io; 104 int cmd; 105 caddr_t arg; 106 { 107 108 return (ECMD); 109 } 110