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Annotation of 41BSD/4.0.upgrade/sys/stand/mba.c, revision 1.1.1.1

1.1       root        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: }

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