projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| b5d17f4d | 1 | /* idc.c 4.2 82/07/15 */ |
| 57fa886d SL |
2 | |
| 3 | /* | |
| 4 | * IDC (RB730) | |
| 5 | * | |
| 6 | * This driver is full of kludges! | |
| 7 | * It depends heavily on the 1K file system. | |
| 8 | */ | |
| 9 | ||
| 10 | #include "../h/param.h" | |
| 11 | #include "../h/idcreg.h" | |
| 12 | #include "../h/inode.h" | |
| 13 | #include "../h/pte.h" | |
| 14 | #include "../h/ubareg.h" | |
| b5d17f4d | 15 | #include "../h/fs.h" |
| 57fa886d SL |
16 | #include "saio.h" |
| 17 | #include "savax.h" | |
| 18 | ||
| 19 | u_short idcstd[] = { 0175606 }; | |
| 20 | short rb02_off[] = { 0, 400, 0, -1, -1, -1, -1, -1 }; | |
| 21 | short rb80_off[] = { 0, 37, 0, -1, -1, -1, 115, 305 }; | |
| 22 | ||
| 23 | int idc_type[4]; | |
| 24 | ||
| 25 | idcopen(io) | |
| 26 | register struct iob *io; | |
| 27 | { | |
| 28 | register struct idcdevice *idcaddr; | |
| 29 | register int i; | |
| 30 | ||
| 31 | idcaddr = (struct idcdevice *)((caddr_t)ubauba(io->i_unit) + 0x200); | |
| 32 | if (io->i_boff < 0 || io->i_boff > 7) | |
| 33 | _stop("idc bad unit"); | |
| 34 | idcaddr->idcmpr = IDCGS_GETSTAT; | |
| 35 | idcaddr->idccsr = IDC_GETSTAT|(io->i_unit<<8); | |
| 36 | idcwait(idcaddr); | |
| 37 | i = idcaddr->idcmpr; | |
| 38 | idcaddr->idccsr = IDC_CRDY|(1<<(io->i_unit+16)); | |
| 39 | idcwait(idcaddr); | |
| 40 | idcaddr->idccsr = (io->i_unit<<8)|IDC_RHDR; | |
| 41 | idcwait(idcaddr); | |
| 42 | if (idcaddr->idccsr & IDC_ERR) { | |
| 43 | printf("idc error: idccsr %x\n", idcaddr->idccsr); | |
| 44 | _stop("idc fatal error"); | |
| 45 | } | |
| 46 | i = idcaddr->idcmpr; | |
| 47 | i = idcaddr->idcmpr; | |
| 48 | if (idcaddr->idccsr & IDC_R80) { | |
| 49 | idc_type[io->i_unit] = 1; | |
| 50 | io->i_boff = rb80_off[io->i_boff]; | |
| 51 | } else { | |
| 52 | idc_type[io->i_unit] = 0; | |
| 53 | io->i_boff = rb02_off[io->i_boff]; | |
| 54 | } | |
| 55 | if (io->i_boff < 0) | |
| 56 | _stop("idc bad unit"); | |
| 57 | } | |
| 58 | ||
| 59 | idcstrategy(io, func) | |
| 60 | register struct iob *io; | |
| 61 | { | |
| 62 | register struct idcdevice *idcaddr; | |
| 63 | int com; | |
| 64 | daddr_t bn; | |
| 65 | short dn, cn, sn, tn; | |
| 66 | int ubinfo, errcnt = 0; | |
| 67 | ||
| 68 | idcaddr = (struct idcdevice *)((caddr_t)ubauba(io->i_unit) + 0x200); | |
| 69 | retry: | |
| 70 | ubinfo = ubasetup(io, 1); | |
| 71 | bn = io->i_bn; | |
| 72 | dn = io->i_unit; | |
| 73 | if (io->i_cc != 1024) printf("idc: count %d != 1024\n", io->i_cc); | |
| 74 | if (idc_type[dn]) { | |
| 75 | cn = bn/(NRB80SECT*NRB80TRK); | |
| 76 | sn = bn%NRB80SECT; | |
| 77 | tn = (bn / NRB80SECT) % NRB80TRK; | |
| 78 | if (sn == NRB80SECT) | |
| 79 | io->i_cc = 512; | |
| 80 | } else { | |
| 81 | bn *= 2; | |
| 82 | cn = bn/(NRB02SECT*NRB02TRK); | |
| 83 | sn = bn%NRB02SECT; | |
| 84 | tn = (bn / NRB02SECT) % NRB02TRK; | |
| 85 | } | |
| 86 | cn += io->i_boff; | |
| 87 | idcaddr->idccsr = IDC_CRDY|IDC_SEEK|(dn<<8)|(1<<(dn+16)); | |
| 88 | idcaddr->idcdar = (cn<<16)|(tn<<8)|sn; | |
| 89 | idcaddr->idccsr = IDC_SEEK|(dn<<8); | |
| 90 | idcwait(idcaddr); | |
| 91 | idcaddr->idccsr &= ~IDC_ATTN; | |
| 92 | com = dn<<8; | |
| 93 | if (func == READ) | |
| 94 | com |= IDC_READ; | |
| 95 | else | |
| 96 | com |= IDC_WRITE; | |
| 97 | idcaddr->idccsr = IDC_CRDY|com; | |
| 98 | idcaddr->idcbar = ubinfo&0x3ffff; | |
| 99 | idcaddr->idcbcr = -io->i_cc; | |
| 100 | idcaddr->idcdar = (cn<<16)|(tn<<8)|sn; | |
| 101 | idcaddr->idccsr = com; | |
| 102 | idcwait(idcaddr); | |
| 103 | ubafree(io, ubinfo); | |
| 104 | if (idcaddr->idccsr & IDC_ERR) { | |
| 105 | printf("idc error: (cyl,trk,sec)=(%d,%d,%d) csr=%b\n", | |
| 106 | cn, tn, sn, idcaddr->idccsr, IDCCSR_BITS); | |
| 107 | if (errcnt == 10) { | |
| 108 | printf("idc: unrecovered error\n"); | |
| 109 | return (-1); | |
| 110 | } | |
| 111 | errcnt++; | |
| 112 | goto retry; | |
| 113 | } | |
| 114 | if (errcnt) | |
| 115 | printf("idc: recovered by retry\n"); | |
| 116 | if (idc_type[dn] && sn == NRB80SECT) { | |
| 117 | io->i_bn++; | |
| 118 | goto retry; | |
| 119 | } | |
| 120 | return (1024); | |
| 121 | } | |
| 122 | ||
| 123 | idcwait(idcaddr) | |
| 124 | register struct idcdevice *idcaddr; | |
| 125 | { | |
| 126 | register int i; | |
| 127 | ||
| 128 | while ((idcaddr->idccsr & (IDC_CRDY|IDC_DRDY)) != (IDC_CRDY|IDC_DRDY)) | |
| 129 | for (i = 10; i; i--) | |
| 130 | ; | |
| 131 | } |