projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 5a80d91a | 1 | /* mba.c 1.2 %G% */ |
| 6810489f BJ |
2 | |
| 3 | #include "../h/param.h" | |
| 4 | #include "../h/inode.h" | |
| 5 | #include "../h/pte.h" | |
| 6 | #include "../h/mba.h" | |
| 7 | #include "../h/mtpr.h" | |
| 8 | #include "../h/vm.h" | |
| 9 | #include "saio.h" | |
| 10 | ||
| 11 | /* | |
| 12 | * startup routine for MBA controllers. | |
| 13 | */ | |
| 14 | #define MBAWCOM 0x30 | |
| 15 | #define MBARCOM 0x38 | |
| 16 | #define GO 01 | |
| 17 | ||
| 18 | mbastart(io, adcr, func) | |
| 19 | register struct iob *io; | |
| 20 | int *adcr; | |
| 21 | { | |
| 22 | register int i; | |
| 23 | int npf; | |
| 24 | unsigned v; | |
| 25 | register struct pte *pte; | |
| 26 | int o; | |
| 27 | int vaddr; | |
| 28 | extern int mbanum[], *mbaloc[]; | |
| 29 | register struct mba_regs *mbap; | |
| 30 | ||
| 5a80d91a | 31 | mbap = (struct mba_regs *)mbaloc[mbanum[io->i_ino.i_dev]]; |
| 6810489f BJ |
32 | pte = (struct pte *)mbap; |
| 33 | pte += (MBA_MAP + 128*4)/4; | |
| 34 | v = btop(io->i_ma); | |
| 35 | o = (int)io->i_ma & PGOFSET; | |
| 36 | npf = btoc(io->i_cc + o); | |
| 37 | vaddr = (128 << 9) | o; | |
| 38 | v &= 0x1fffff; /* drop to physical addr */ | |
| 39 | while (--npf >= 0) | |
| 40 | *(int *)pte++ = v++ | PG_V; | |
| 41 | mbap->mba_sr = -1; /* clear status (error) bits */ | |
| 42 | mbap->mba_bcr = -io->i_cc; | |
| 43 | mbap->mba_var = vaddr; | |
| 44 | if (func == READ) | |
| 45 | *adcr = MBARCOM | GO; | |
| 46 | else if (func == WRITE) { | |
| 47 | *adcr = MBAWCOM | GO; | |
| 48 | } | |
| 49 | } |