Commit | Line | Data |
---|---|---|
8ae0e4b4 | 1 | /* |
0880b18e | 2 | * Copyright (c) 1982, 1986 Regents of the University of California. |
8ae0e4b4 KM |
3 | * All rights reserved. The Berkeley software License Agreement |
4 | * specifies the terms and conditions for redistribution. | |
5 | * | |
39c71180 | 6 | * @(#)idc.c 7.2 (Berkeley) %G% |
8ae0e4b4 | 7 | */ |
57fa886d SL |
8 | |
9 | /* | |
10 | * IDC (RB730) | |
57fa886d | 11 | */ |
faeec66d | 12 | #include "../machine/pte.h" |
57fa886d | 13 | |
39c71180 MK |
14 | #include "param.h" |
15 | #include "inode.h" | |
16 | #include "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); | |
39c71180 MK |
37 | if ((unsigned)io->i_boff > 7) { |
38 | printf("idc bad unit"); | |
39 | return (EUNIT); | |
40 | } | |
57fa886d SL |
41 | idcaddr->idcmpr = IDCGS_GETSTAT; |
42 | idcaddr->idccsr = IDC_GETSTAT|(io->i_unit<<8); | |
43 | idcwait(idcaddr); | |
44 | i = idcaddr->idcmpr; | |
45 | idcaddr->idccsr = IDC_CRDY|(1<<(io->i_unit+16)); | |
46 | idcwait(idcaddr); | |
47 | idcaddr->idccsr = (io->i_unit<<8)|IDC_RHDR; | |
48 | idcwait(idcaddr); | |
49 | if (idcaddr->idccsr & IDC_ERR) { | |
50 | printf("idc error: idccsr %x\n", idcaddr->idccsr); | |
39c71180 | 51 | return (EIO); |
57fa886d SL |
52 | } |
53 | i = idcaddr->idcmpr; | |
54 | i = idcaddr->idcmpr; | |
55 | if (idcaddr->idccsr & IDC_R80) { | |
56 | idc_type[io->i_unit] = 1; | |
b65f093e | 57 | io->i_boff = rb80_off[io->i_boff] * NRB80SECT * NRB80TRK; |
57fa886d SL |
58 | } else { |
59 | idc_type[io->i_unit] = 0; | |
b65f093e | 60 | io->i_boff = rb02_off[io->i_boff] * NRB02SECT/2 * NRB02TRK; |
57fa886d | 61 | } |
39c71180 MK |
62 | if (io->i_boff < 0) { |
63 | printf("idc%d: bad unit type", io->i_unit); | |
64 | return (EUNIT); | |
65 | } | |
66 | return (0); | |
57fa886d SL |
67 | } |
68 | ||
69 | idcstrategy(io, func) | |
70 | register struct iob *io; | |
71 | { | |
72 | register struct idcdevice *idcaddr; | |
73 | int com; | |
74 | daddr_t bn; | |
75 | short dn, cn, sn, tn; | |
695069ba | 76 | short ccleft, thiscc = 0; |
57fa886d SL |
77 | int ubinfo, errcnt = 0; |
78 | ||
79 | idcaddr = (struct idcdevice *)((caddr_t)ubauba(io->i_unit) + 0x200); | |
57fa886d SL |
80 | ubinfo = ubasetup(io, 1); |
81 | bn = io->i_bn; | |
695069ba BF |
82 | ccleft = io->i_cc; |
83 | retry: | |
57fa886d | 84 | dn = io->i_unit; |
57fa886d SL |
85 | if (idc_type[dn]) { |
86 | cn = bn/(NRB80SECT*NRB80TRK); | |
87 | sn = bn%NRB80SECT; | |
88 | tn = (bn / NRB80SECT) % NRB80TRK; | |
695069ba | 89 | thiscc = (NRB80SECT - sn) * 512; |
57fa886d | 90 | } else { |
695069ba BF |
91 | cn = 2*bn/(NRB02SECT*NRB02TRK); |
92 | sn = (2*bn)%NRB02SECT; | |
93 | tn = (2*bn / NRB02SECT) % NRB02TRK; | |
94 | thiscc = (NRB02SECT - sn) * 256; | |
57fa886d | 95 | } |
695069ba BF |
96 | thiscc = MIN(thiscc, ccleft); |
97 | ccleft -= thiscc; | |
57fa886d SL |
98 | idcaddr->idccsr = IDC_CRDY|IDC_SEEK|(dn<<8)|(1<<(dn+16)); |
99 | idcaddr->idcdar = (cn<<16)|(tn<<8)|sn; | |
100 | idcaddr->idccsr = IDC_SEEK|(dn<<8); | |
101 | idcwait(idcaddr); | |
102 | idcaddr->idccsr &= ~IDC_ATTN; | |
103 | com = dn<<8; | |
104 | if (func == READ) | |
105 | com |= IDC_READ; | |
106 | else | |
107 | com |= IDC_WRITE; | |
108 | idcaddr->idccsr = IDC_CRDY|com; | |
109 | idcaddr->idcbar = ubinfo&0x3ffff; | |
695069ba | 110 | idcaddr->idcbcr = -thiscc; |
57fa886d SL |
111 | idcaddr->idcdar = (cn<<16)|(tn<<8)|sn; |
112 | idcaddr->idccsr = com; | |
113 | idcwait(idcaddr); | |
57fa886d | 114 | if (idcaddr->idccsr & IDC_ERR) { |
b65f093e MK |
115 | printf("idc%d error: (cyl,trk,sec)=(%d,%d,%d) csr=%b\n", |
116 | dn, cn, tn, sn, idcaddr->idccsr, IDCCSR_BITS); | |
57fa886d SL |
117 | if (errcnt == 10) { |
118 | printf("idc: unrecovered error\n"); | |
695069ba | 119 | ubafree(io, ubinfo); |
57fa886d SL |
120 | return (-1); |
121 | } | |
122 | errcnt++; | |
123 | goto retry; | |
124 | } | |
125 | if (errcnt) | |
126 | printf("idc: recovered by retry\n"); | |
695069ba | 127 | if (ccleft) { |
2e4ee04a | 128 | bn += thiscc/NBPG; |
695069ba | 129 | ubinfo += thiscc; |
57fa886d SL |
130 | goto retry; |
131 | } | |
695069ba BF |
132 | ubafree(io, ubinfo); |
133 | return (io->i_cc); | |
57fa886d SL |
134 | } |
135 | ||
136 | idcwait(idcaddr) | |
137 | register struct idcdevice *idcaddr; | |
138 | { | |
139 | register int i; | |
140 | ||
141 | while ((idcaddr->idccsr & (IDC_CRDY|IDC_DRDY)) != (IDC_CRDY|IDC_DRDY)) | |
142 | for (i = 10; i; i--) | |
143 | ; | |
144 | } | |
75f313ad SL |
145 | |
146 | /*ARGSUSED*/ | |
147 | idcioctl(io, cmd, arg) | |
148 | struct iob *io; | |
149 | int cmd; | |
150 | caddr_t arg; | |
151 | { | |
152 | ||
153 | return (ECMD); | |
154 | } |