Commit | Line | Data |
---|---|---|
8ae0e4b4 KM |
1 | /* |
2 | * Copyright (c) 1982 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 | * @(#)idc.c 6.3 (Berkeley) %G% | |
7 | */ | |
57fa886d SL |
8 | |
9 | /* | |
10 | * IDC (RB730) | |
57fa886d | 11 | */ |
faeec66d | 12 | #include "../machine/pte.h" |
57fa886d SL |
13 | |
14 | #include "../h/param.h" | |
57fa886d | 15 | #include "../h/inode.h" |
b5d17f4d | 16 | #include "../h/fs.h" |
a031a31b SL |
17 | |
18 | #include "../vaxuba/idcreg.h" | |
19 | #include "../vaxuba/ubareg.h" | |
20 | ||
57fa886d SL |
21 | #include "saio.h" |
22 | #include "savax.h" | |
23 | ||
24 | u_short idcstd[] = { 0175606 }; | |
25 | short rb02_off[] = { 0, 400, 0, -1, -1, -1, -1, -1 }; | |
26 | short rb80_off[] = { 0, 37, 0, -1, -1, -1, 115, 305 }; | |
27 | ||
28 | int idc_type[4]; | |
29 | ||
30 | idcopen(io) | |
31 | register struct iob *io; | |
32 | { | |
33 | register struct idcdevice *idcaddr; | |
34 | register int i; | |
35 | ||
36 | idcaddr = (struct idcdevice *)((caddr_t)ubauba(io->i_unit) + 0x200); | |
37 | if (io->i_boff < 0 || io->i_boff > 7) | |
38 | _stop("idc bad unit"); | |
39 | idcaddr->idcmpr = IDCGS_GETSTAT; | |
40 | idcaddr->idccsr = IDC_GETSTAT|(io->i_unit<<8); | |
41 | idcwait(idcaddr); | |
42 | i = idcaddr->idcmpr; | |
43 | idcaddr->idccsr = IDC_CRDY|(1<<(io->i_unit+16)); | |
44 | idcwait(idcaddr); | |
45 | idcaddr->idccsr = (io->i_unit<<8)|IDC_RHDR; | |
46 | idcwait(idcaddr); | |
47 | if (idcaddr->idccsr & IDC_ERR) { | |
48 | printf("idc error: idccsr %x\n", idcaddr->idccsr); | |
49 | _stop("idc fatal error"); | |
50 | } | |
51 | i = idcaddr->idcmpr; | |
52 | i = idcaddr->idcmpr; | |
53 | if (idcaddr->idccsr & IDC_R80) { | |
54 | idc_type[io->i_unit] = 1; | |
b65f093e | 55 | io->i_boff = rb80_off[io->i_boff] * NRB80SECT * NRB80TRK; |
57fa886d SL |
56 | } else { |
57 | idc_type[io->i_unit] = 0; | |
b65f093e | 58 | io->i_boff = rb02_off[io->i_boff] * NRB02SECT/2 * NRB02TRK; |
57fa886d SL |
59 | } |
60 | if (io->i_boff < 0) | |
695069ba | 61 | _stop("idc%d: bad unit type", io->i_unit); |
57fa886d SL |
62 | } |
63 | ||
64 | idcstrategy(io, func) | |
65 | register struct iob *io; | |
66 | { | |
67 | register struct idcdevice *idcaddr; | |
68 | int com; | |
69 | daddr_t bn; | |
70 | short dn, cn, sn, tn; | |
695069ba | 71 | short ccleft, thiscc = 0; |
57fa886d SL |
72 | int ubinfo, errcnt = 0; |
73 | ||
74 | idcaddr = (struct idcdevice *)((caddr_t)ubauba(io->i_unit) + 0x200); | |
57fa886d SL |
75 | ubinfo = ubasetup(io, 1); |
76 | bn = io->i_bn; | |
695069ba BF |
77 | ccleft = io->i_cc; |
78 | retry: | |
57fa886d | 79 | dn = io->i_unit; |
57fa886d SL |
80 | if (idc_type[dn]) { |
81 | cn = bn/(NRB80SECT*NRB80TRK); | |
82 | sn = bn%NRB80SECT; | |
83 | tn = (bn / NRB80SECT) % NRB80TRK; | |
695069ba | 84 | thiscc = (NRB80SECT - sn) * 512; |
57fa886d | 85 | } else { |
695069ba BF |
86 | cn = 2*bn/(NRB02SECT*NRB02TRK); |
87 | sn = (2*bn)%NRB02SECT; | |
88 | tn = (2*bn / NRB02SECT) % NRB02TRK; | |
89 | thiscc = (NRB02SECT - sn) * 256; | |
57fa886d | 90 | } |
695069ba BF |
91 | thiscc = MIN(thiscc, ccleft); |
92 | ccleft -= thiscc; | |
57fa886d SL |
93 | idcaddr->idccsr = IDC_CRDY|IDC_SEEK|(dn<<8)|(1<<(dn+16)); |
94 | idcaddr->idcdar = (cn<<16)|(tn<<8)|sn; | |
95 | idcaddr->idccsr = IDC_SEEK|(dn<<8); | |
96 | idcwait(idcaddr); | |
97 | idcaddr->idccsr &= ~IDC_ATTN; | |
98 | com = dn<<8; | |
99 | if (func == READ) | |
100 | com |= IDC_READ; | |
101 | else | |
102 | com |= IDC_WRITE; | |
103 | idcaddr->idccsr = IDC_CRDY|com; | |
104 | idcaddr->idcbar = ubinfo&0x3ffff; | |
695069ba | 105 | idcaddr->idcbcr = -thiscc; |
57fa886d SL |
106 | idcaddr->idcdar = (cn<<16)|(tn<<8)|sn; |
107 | idcaddr->idccsr = com; | |
108 | idcwait(idcaddr); | |
57fa886d | 109 | if (idcaddr->idccsr & IDC_ERR) { |
b65f093e MK |
110 | printf("idc%d error: (cyl,trk,sec)=(%d,%d,%d) csr=%b\n", |
111 | dn, cn, tn, sn, idcaddr->idccsr, IDCCSR_BITS); | |
57fa886d SL |
112 | if (errcnt == 10) { |
113 | printf("idc: unrecovered error\n"); | |
695069ba | 114 | ubafree(io, ubinfo); |
57fa886d SL |
115 | return (-1); |
116 | } | |
117 | errcnt++; | |
118 | goto retry; | |
119 | } | |
120 | if (errcnt) | |
121 | printf("idc: recovered by retry\n"); | |
695069ba | 122 | if (ccleft) { |
2e4ee04a | 123 | bn += thiscc/NBPG; |
695069ba | 124 | ubinfo += thiscc; |
57fa886d SL |
125 | goto retry; |
126 | } | |
695069ba BF |
127 | ubafree(io, ubinfo); |
128 | return (io->i_cc); | |
57fa886d SL |
129 | } |
130 | ||
131 | idcwait(idcaddr) | |
132 | register struct idcdevice *idcaddr; | |
133 | { | |
134 | register int i; | |
135 | ||
136 | while ((idcaddr->idccsr & (IDC_CRDY|IDC_DRDY)) != (IDC_CRDY|IDC_DRDY)) | |
137 | for (i = 10; i; i--) | |
138 | ; | |
139 | } | |
75f313ad SL |
140 | |
141 | /*ARGSUSED*/ | |
142 | idcioctl(io, cmd, arg) | |
143 | struct iob *io; | |
144 | int cmd; | |
145 | caddr_t arg; | |
146 | { | |
147 | ||
148 | return (ECMD); | |
149 | } |