Commit | Line | Data |
---|---|---|
b5d17f4d | 1 | /* rk.c 4.5 82/07/15 */ |
f2a29127 BJ |
2 | |
3 | /* | |
99fe9747 | 4 | * RK611/RK07 |
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5 | */ |
6 | ||
7 | #include "../h/param.h" | |
99fe9747 | 8 | #include "../h/rkreg.h" |
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9 | #include "../h/inode.h" |
10 | #include "../h/pte.h" | |
99fe9747 | 11 | #include "../h/ubareg.h" |
b5d17f4d | 12 | #include "../h/fs.h" |
f2a29127 | 13 | #include "saio.h" |
99fe9747 | 14 | #include "savax.h" |
f2a29127 | 15 | |
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16 | u_short rkstd[] = { 0777440 }; |
17 | short rk_off[] = { 0, 241, 0, -1, -1, -1, 393, -1 }; | |
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18 | |
19 | rkopen(io) | |
99fe9747 | 20 | register struct iob *io; |
f2a29127 | 21 | { |
10899d3a | 22 | register struct rkdevice *rkaddr = (struct rkdevice *)ubamem(io->i_unit, rkstd[0]); |
f2a29127 | 23 | |
99fe9747 | 24 | if (rk_off[io->i_boff] == -1 || |
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25 | io->i_boff < 0 || io->i_boff > 7) |
26 | _stop("rk bad unit"); | |
99fe9747 | 27 | io->i_boff = rk_off[io->i_boff] * NRKSECT*NRKTRK; |
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28 | rkaddr->rkcs2 = RKCS2_SCLR; |
29 | rkwait(rkaddr); | |
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30 | } |
31 | ||
32 | rkstrategy(io, func) | |
99fe9747 | 33 | register struct iob *io; |
f2a29127 | 34 | { |
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35 | register struct rkdevice *rkaddr = (struct rkdevice *)ubamem(io->i_unit, rkstd[0]); |
36 | int com; | |
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37 | daddr_t bn; |
38 | short dn, cn, sn, tn; | |
10899d3a | 39 | int ubinfo, errcnt = 0; |
f2a29127 | 40 | |
10899d3a | 41 | retry: |
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42 | ubinfo = ubasetup(io, 1); |
43 | bn = io->i_bn; | |
44 | dn = io->i_unit; | |
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45 | cn = bn/(NRKSECT*NRKTRK); |
46 | sn = bn%NRKSECT; | |
47 | tn = (bn / NRKSECT) % NRKTRK; | |
48 | rkaddr->rkcs2 = dn; | |
49 | rkaddr->rkcs1 = RK_CDT|RK_PACK|RK_GO; | |
50 | rkwait(rkaddr); | |
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51 | rkaddr->rkcs1 = RK_CDT|RK_DCLR|RK_GO; |
52 | rkwait(rkaddr); | |
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53 | rkaddr->rkda = sn | (tn << 8); |
54 | rkaddr->rkcyl = cn; | |
55 | rkaddr->rkba = ubinfo; | |
56 | rkaddr->rkwc = -(io->i_cc >> 1); | |
46fa6ed3 | 57 | com = RK_CDT|((ubinfo>>8)&0x300)|RK_GO; |
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58 | if (func == READ) |
59 | com |= RK_READ; | |
60 | else | |
61 | com |= RK_WRITE; | |
62 | rkaddr->rkcs1 = com; | |
63 | rkwait(rkaddr); | |
10899d3a | 64 | while ((rkaddr->rkds & RKDS_SVAL) == 0) |
f2a29127 | 65 | ; |
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66 | ubafree(io, ubinfo); |
67 | if (rkaddr->rkcs1 & RK_CERR) { | |
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68 | printf("rk error: (cyl,trk,sec)=(%d,%d,%d) cs2=%b er=%b\n", |
69 | cn, tn, sn, rkaddr->rkcs2, RKCS2_BITS, | |
70 | rkaddr->rker, RKER_BITS); | |
71 | rkaddr->rkcs1 = RK_CDT|RK_DCLR|RK_GO; | |
99fe9747 | 72 | rkwait(rkaddr); |
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73 | if (errcnt == 10) { |
74 | printf("rk: unrecovered error\n"); | |
75 | return (-1); | |
76 | } | |
77 | errcnt++; | |
78 | goto retry; | |
f2a29127 | 79 | } |
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80 | if (errcnt) |
81 | printf("rk: recovered by retry\n"); | |
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82 | return (io->i_cc); |
83 | } | |
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84 | |
85 | rkwait(rkaddr) | |
86 | register struct rkdevice *rkaddr; | |
87 | { | |
88 | ||
89 | while ((rkaddr->rkcs1 & RK_CRDY) == 0) | |
90 | ; | |
91 | } |