projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 1f0241d9 DR |
1 | # |
| 2 | /* | |
| 3 | */ | |
| 4 | ||
| 5 | /* | |
| 6 | * RS03/04 disk driver | |
| 7 | */ | |
| 8 | ||
| 9 | #include "../param.h" | |
| 10 | #include "../buf.h" | |
| 11 | #include "../conf.h" | |
| 12 | #include "../user.h" | |
| 13 | ||
| 14 | ||
| 15 | struct { | |
| 16 | int hscs1; /* Control and Status register 1 */ | |
| 17 | int hswc; /* Word count register */ | |
| 18 | int hsba; /* UNIBUS address register */ | |
| 19 | int hsda; /* Desired address register */ | |
| 20 | int hscs2; /* Control and Status register 2 */ | |
| 21 | int hsds; /* Drive Status */ | |
| 22 | int hser; /* Error register */ | |
| 23 | int hsas; /* not used */ | |
| 24 | int hsla; /* not used */ | |
| 25 | int hsdb; /* not used */ | |
| 26 | int hsmr; /* not used */ | |
| 27 | int hsdt; /* not used */ | |
| 28 | int hsbae; /* 11/70 bus extension */ | |
| 29 | }; | |
| 30 | ||
| 31 | struct devtab hstab; | |
| 32 | struct buf rhsbuf; | |
| 33 | ||
| 34 | #define HSADDR 0172040 | |
| 35 | ||
| 36 | #define ERR 040000 /* hscs1 - composite error */ | |
| 37 | ||
| 38 | #define GO 01 | |
| 39 | #define RCLR 010 | |
| 40 | #define DRY 0200 /* hsds - Drive Ready */ | |
| 41 | ||
| 42 | hsstrategy(abp) | |
| 43 | struct buf *abp; | |
| 44 | { | |
| 45 | register struct buf *bp; | |
| 46 | register mblks; | |
| 47 | ||
| 48 | bp = abp; | |
| 49 | mblks = 1024; /* RJS03 */ | |
| 50 | if(bp->b_dev.d_minor >= 8) | |
| 51 | mblks = 2048; /* RJS04 */ | |
| 52 | if(bp->b_blkno >= mblks) { | |
| 53 | bp->b_flags =| B_ERROR; | |
| 54 | iodone(bp); | |
| 55 | return; | |
| 56 | } | |
| 57 | bp->av_forw = 0; | |
| 58 | spl5(); | |
| 59 | if (hstab.d_actf==0) | |
| 60 | hstab.d_actf = bp; else | |
| 61 | hstab.d_actl->av_forw = bp; | |
| 62 | hstab.d_actl = bp; | |
| 63 | if (hstab.d_active==0) | |
| 64 | hsstart(); | |
| 65 | spl0(); | |
| 66 | } | |
| 67 | ||
| 68 | hsstart() | |
| 69 | { | |
| 70 | register struct buf *bp; | |
| 71 | register addr; | |
| 72 | ||
| 73 | if ((bp = hstab.d_actf) == 0) | |
| 74 | return; | |
| 75 | hstab.d_active++; | |
| 76 | addr = bp->b_blkno; | |
| 77 | if(bp->b_dev.d_minor < 8) | |
| 78 | addr =<< 1; /* RJS03 */ | |
| 79 | HSADDR->hscs2 = bp->b_dev.d_minor & 07; | |
| 80 | rhstart(bp, &HSADDR->hsda, addr<<1, &HSADDR->hsbae); | |
| 81 | } | |
| 82 | ||
| 83 | hsintr() | |
| 84 | { | |
| 85 | register struct buf *bp; | |
| 86 | ||
| 87 | if (hstab.d_active == 0) | |
| 88 | return; | |
| 89 | bp = hstab.d_actf; | |
| 90 | hstab.d_active = 0; | |
| 91 | if(HSADDR->hscs1 & ERR){ /* error bit */ | |
| 92 | deverror(bp, HSADDR->hscs2, 0); | |
| 93 | HSADDR->hscs1 = RCLR|GO; | |
| 94 | if (++hstab.d_errcnt <= 10) { | |
| 95 | hsstart(); | |
| 96 | return; | |
| 97 | } | |
| 98 | bp->b_flags =| B_ERROR; | |
| 99 | } | |
| 100 | hstab.d_errcnt = 0; | |
| 101 | hstab.d_actf = bp->av_forw; | |
| 102 | iodone(bp); | |
| 103 | hsstart(); | |
| 104 | } | |
| 105 | ||
| 106 | hsread(dev) | |
| 107 | { | |
| 108 | ||
| 109 | physio(hsstrategy, &rhsbuf, dev, B_READ); | |
| 110 | } | |
| 111 | ||
| 112 | hswrite(dev) | |
| 113 | { | |
| 114 | ||
| 115 | physio(hsstrategy, &rhsbuf, dev, B_WRITE); | |
| 116 | } |