projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 4e13f7fb C |
1 | /* rk.c 4.4 81/07/25 */ |
| 2 | ||
| 3 | /* | |
| 4 | * RK611/RK07 | |
| 5 | */ | |
| 6 | ||
| 7 | #include "../h/param.h" | |
| 8 | #include "../h/rkreg.h" | |
| 9 | #include "../h/inode.h" | |
| 10 | #include "../h/pte.h" | |
| 11 | #include "../h/ubareg.h" | |
| 12 | #include "saio.h" | |
| 13 | #include "savax.h" | |
| 14 | ||
| 15 | u_short rkstd[] = { 0777440 }; | |
| 16 | short rk_off[] = { 0, 241, 0, -1, -1, -1, 393, -1 }; | |
| 17 | ||
| 18 | rkopen(io) | |
| 19 | register struct iob *io; | |
| 20 | { | |
| 21 | register struct rkdevice *rkaddr = (struct rkdevice *)ubamem(io->i_unit, rkstd[0]); | |
| 22 | ||
| 23 | if (rk_off[io->i_boff] == -1 || | |
| 24 | io->i_boff < 0 || io->i_boff > 7) | |
| 25 | _stop("rk bad unit"); | |
| 26 | io->i_boff = rk_off[io->i_boff] * NRKSECT*NRKTRK; | |
| 27 | rkaddr->rkcs2 = RKCS2_SCLR; | |
| 28 | rkwait(rkaddr); | |
| 29 | } | |
| 30 | ||
| 31 | rkstrategy(io, func) | |
| 32 | register struct iob *io; | |
| 33 | { | |
| 34 | register struct rkdevice *rkaddr = (struct rkdevice *)ubamem(io->i_unit, rkstd[0]); | |
| 35 | int com; | |
| 36 | daddr_t bn; | |
| 37 | short dn, cn, sn, tn; | |
| 38 | int ubinfo, errcnt = 0; | |
| 39 | ||
| 40 | retry: | |
| 41 | ubinfo = ubasetup(io, 1); | |
| 42 | bn = io->i_bn; | |
| 43 | dn = io->i_unit; | |
| 44 | cn = bn/(NRKSECT*NRKTRK); | |
| 45 | sn = bn%NRKSECT; | |
| 46 | tn = (bn / NRKSECT) % NRKTRK; | |
| 47 | rkaddr->rkcs2 = dn; | |
| 48 | rkaddr->rkcs1 = RK_CDT|RK_PACK|RK_GO; | |
| 49 | rkwait(rkaddr); | |
| 50 | rkaddr->rkcs1 = RK_CDT|RK_DCLR|RK_GO; | |
| 51 | rkwait(rkaddr); | |
| 52 | rkaddr->rkda = sn | (tn << 8); | |
| 53 | rkaddr->rkcyl = cn; | |
| 54 | rkaddr->rkba = ubinfo; | |
| 55 | rkaddr->rkwc = -(io->i_cc >> 1); | |
| 56 | com = RK_CDT|((ubinfo>>8)&0x300)|RK_GO; | |
| 57 | if (func == READ) | |
| 58 | com |= RK_READ; | |
| 59 | else | |
| 60 | com |= RK_WRITE; | |
| 61 | rkaddr->rkcs1 = com; | |
| 62 | rkwait(rkaddr); | |
| 63 | while ((rkaddr->rkds & RKDS_SVAL) == 0) | |
| 64 | ; | |
| 65 | ubafree(io, ubinfo); | |
| 66 | if (rkaddr->rkcs1 & RK_CERR) { | |
| 67 | printf("rk error: (cyl,trk,sec)=(%d,%d,%d) cs2=%b er=%b\n", | |
| 68 | cn, tn, sn, rkaddr->rkcs2, RKCS2_BITS, | |
| 69 | rkaddr->rker, RKER_BITS); | |
| 70 | rkaddr->rkcs1 = RK_CDT|RK_DCLR|RK_GO; | |
| 71 | rkwait(rkaddr); | |
| 72 | if (errcnt == 10) { | |
| 73 | printf("rk: unrecovered error\n"); | |
| 74 | return (-1); | |
| 75 | } | |
| 76 | errcnt++; | |
| 77 | goto retry; | |
| 78 | } | |
| 79 | if (errcnt) | |
| 80 | printf("rk: recovered by retry\n"); | |
| 81 | return (io->i_cc); | |
| 82 | } | |
| 83 | ||
| 84 | rkwait(rkaddr) | |
| 85 | register struct rkdevice *rkaddr; | |
| 86 | { | |
| 87 | ||
| 88 | while ((rkaddr->rkcs1 & RK_CRDY) == 0) | |
| 89 | ; | |
| 90 | } |