projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| da1392b6 | 1 | /* mba.c 3.5 %G% */ |
| b5ad10c3 BJ |
2 | |
| 3 | #include "../h/param.h" | |
| 4 | #include "../h/buf.h" | |
| 5 | #include "../h/conf.h" | |
| 6 | #include "../h/systm.h" | |
| 7 | #include "../h/dir.h" | |
| 8 | #include "../h/user.h" | |
| 9 | #include "../h/proc.h" | |
| 10 | #include "../h/seg.h" | |
| 11 | #include "../h/pte.h" | |
| 12 | #include "../h/map.h" | |
| 13 | #include "../h/mba.h" | |
| 14 | #include "../h/mtpr.h" | |
| 15 | #include "../h/vm.h" | |
| 16 | ||
| 17 | /* | |
| 18 | * startup routine for MBA controllers. | |
| 19 | */ | |
| 20 | #define MBAWCOM 0x30 | |
| 21 | #define MBARCOM 0x38 | |
| 22 | #define GO 01 | |
| 23 | ||
| 80e7c811 | 24 | extern char buffers[NBUF][BSIZE]; |
| b5ad10c3 BJ |
25 | |
| 26 | mbastart(bp, adcr) | |
| 80e7c811 BJ |
27 | register struct buf *bp; |
| 28 | int *adcr; | |
| b5ad10c3 BJ |
29 | { |
| 30 | register int i; | |
| 31 | int npf; | |
| 32 | unsigned v; | |
| 33 | register struct pte *pte, *io; | |
| 34 | int o; | |
| 35 | int vaddr; | |
| 36 | register struct mba_regs *mbap; | |
| 37 | struct proc *rp; | |
| b5ad10c3 | 38 | |
| 80e7c811 | 39 | mbap = mbainfo[mbanum[major(bp->b_dev)]].mi_loc; |
| b5ad10c3 | 40 | if ((bp->b_flags & B_PHYS) == 0) |
| 80e7c811 | 41 | vaddr = (bp->b_un.b_addr - buffers[0]); |
| b5ad10c3 | 42 | else { |
| 80e7c811 | 43 | io = &mbap->mba_map[128]; |
| b5ad10c3 BJ |
44 | v = btop(bp->b_un.b_addr); |
| 45 | o = (int)bp->b_un.b_addr & PGOFSET; | |
| 46 | npf = btoc(bp->b_bcount + o); | |
| 47 | rp = bp->b_flags&B_DIRTY ? &proc[2] : bp->b_proc; | |
| 48 | vaddr = (128 << 9) | o; | |
| 49 | if (bp->b_flags & B_UAREA) { | |
| 50 | for (i = 0; i < UPAGES; i++) { | |
| 51 | if (rp->p_addr[i].pg_pfnum == 0) | |
| 52 | panic("mba: zero upage"); | |
| 53 | *(int *)io++ = rp->p_addr[i].pg_pfnum | PG_V; | |
| 54 | } | |
| 55 | } else if ((bp->b_flags & B_PHYS) == 0) { | |
| 56 | v &= 0x1fffff; /* drop to physical addr */ | |
| 57 | while (--npf >= 0) | |
| 58 | *(int *)io++ = v++ | PG_V; | |
| 59 | } else { | |
| 60 | if (bp->b_flags & B_PAGET) | |
| 61 | pte = &Usrptmap[btokmx((struct pte *)bp->b_un.b_addr)]; | |
| 62 | else | |
| 63 | pte = vtopte(rp, v); | |
| 64 | while (--npf >= 0) { | |
| 65 | if (pte->pg_pfnum == 0) | |
| 66 | panic("mba, zero entry"); | |
| 67 | *(int *)io++ = pte++->pg_pfnum | PG_V; | |
| 68 | } | |
| 69 | } | |
| 70 | } | |
| 71 | mbap->mba_sr = -1; /* clear status (error) bits */ | |
| 72 | mbap->mba_bcr = -bp->b_bcount; | |
| 73 | mbap->mba_var = vaddr; | |
| 74 | if (bp->b_flags & B_READ) | |
| 75 | *adcr = MBARCOM | GO; | |
| 76 | else | |
| 77 | *adcr = MBAWCOM | GO; | |
| 78 | } | |
| 79 | ||
| 80e7c811 BJ |
80 | mbainit(mbanum) |
| 81 | int mbanum; | |
| b5ad10c3 | 82 | { |
| 80e7c811 BJ |
83 | register struct pte *io, *b; |
| 84 | register int i; | |
| 85 | register struct mba_info *mi; | |
| 86 | register struct mba_regs *mbap; | |
| 87 | unsigned v; | |
| b5ad10c3 | 88 | |
| 80e7c811 BJ |
89 | mi = &mbainfo[mbanum]; |
| 90 | v = btop((int)mi->mi_phys); | |
| 91 | b = mi->mi_map; | |
| 92 | for (i = 0; i < 8192; i += NBPG) { | |
| 93 | *(int *)b++ = PG_V | PG_KW | v; | |
| 94 | mtpr(TBIS, ptob(v)); | |
| 95 | v++; | |
| 96 | } | |
| 97 | mbap = mi->mi_loc; | |
| 98 | mbap->mba_cr = MBAINIT; | |
| 99 | mbap->mba_cr = MBAIE; | |
| 100 | io = mbap->mba_map; | |
| 101 | b = &Sysmap[btop(((int)buffers[0])&0x7fffffff)]; | |
| 102 | for (i = NBUF * CLSIZE; i > 0; i--) { | |
| 103 | *(int *)io++ = PG_V | b->pg_pfnum; | |
| 104 | b++; | |
| 105 | } | |
| 106 | *(int *)io = 0; | |
| 107 | mbaact |= (1<<mbanum); | |
| b5ad10c3 | 108 | } |