projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| e6d9ed6d C |
1 | /* mba.c 4.3 81/03/15 */ |
| 2 | ||
| 3 | #include "../h/param.h" | |
| 4 | #include "../h/inode.h" | |
| 5 | #include "../h/pte.h" | |
| 6 | #include "../h/mbareg.h" | |
| 7 | #include "../h/mtpr.h" | |
| 8 | #include "../h/vm.h" | |
| 9 | #include "saio.h" | |
| 10 | #include "savax.h" | |
| 11 | ||
| 12 | mbastart(io, func) | |
| 13 | register struct iob *io; | |
| 14 | int func; | |
| 15 | { | |
| 16 | struct mba_regs *mba = mbamba(io->i_unit); | |
| 17 | struct mba_drv *drv = mbadrv(io->i_unit); | |
| 18 | register struct pte *pte = mba->mba_map; | |
| 19 | int npf; | |
| 20 | unsigned v; | |
| 21 | int o; | |
| 22 | int vaddr; | |
| 23 | ||
| 24 | v = btop(io->i_ma); | |
| 25 | o = (int)io->i_ma & PGOFSET; | |
| 26 | npf = btoc(io->i_cc + o); | |
| 27 | vaddr = o; | |
| 28 | while (--npf >= 0) | |
| 29 | *(int *)pte++ = v++ | PG_V; | |
| 30 | mba->mba_sr = -1; | |
| 31 | mba->mba_bcr = -io->i_cc; | |
| 32 | mba->mba_var = vaddr; | |
| 33 | if (func == WRITE) | |
| 34 | drv->mbd_cs1 = MB_WCOM | MB_GO; | |
| 35 | else | |
| 36 | drv->mbd_cs1 = MB_RCOM | MB_GO; | |
| 37 | } | |
| 38 | ||
| 39 | mbainit(mbanum) | |
| 40 | int mbanum; | |
| 41 | { | |
| 42 | register struct mba_regs *mba = mbaddr[mbanum]; | |
| 43 | ||
| 44 | /* SHOULD BADADDR IT */ | |
| 45 | if (mbaact & (1<<mbanum)) | |
| 46 | return; | |
| 47 | mba->mba_cr = MBCR_INIT; | |
| 48 | mbaact |= 1<<mbanum; | |
| 49 | } |