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 } 50