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Annotation of 41BSD/sys/stand/uba.c, revision 1.1

1.1     ! root        1: /*     uba.c   4.1     11/9/80 */
        !             2: 
        !             3: #include "../h/param.h"
        !             4: #include "../h/inode.h"
        !             5: #include "../h/pte.h"
        !             6: #include "../h/uba.h"
        !             7: #include "../h/vm.h"
        !             8: #include "saio.h"
        !             9: 
        !            10: ubasetup(io, bdp)
        !            11: register struct iob *io;
        !            12: {
        !            13:        register int i;
        !            14:        int npf;
        !            15:        unsigned v;
        !            16:        register struct pte *pte;
        !            17:        int o, vaddr, temp;
        !            18: 
        !            19:        v = btop(io->i_ma);
        !            20:        o = (int)io->i_ma & PGOFSET;
        !            21:        npf = btoc(io->i_cc + o) +1;
        !            22:        pte = &(((struct uba_regs *)PHYSUBA0)->uba_map[0]);
        !            23:        temp = (bdp << 21) | MRV;
        !            24:        if (bdp && (o & 01))
        !            25:                temp |= BO;
        !            26:        v &= 0x1fffff;                  /* drop to physical addr */
        !            27:        while (--npf != 0)
        !            28:                *(int *)pte++ = v++ | temp;
        !            29:        *(int *)pte++ = 0;
        !            30:        return ((bdp << 28) | o);
        !            31: }
        !            32: 
        !            33: ubafree(mr)
        !            34:        int mr;
        !            35: {
        !            36:        register int bdp, reg, npf, a;
        !            37:  
        !            38:        bdp = (mr >> 28) & 0x0f;
        !            39:        if (bdp)
        !            40:                ((struct uba_regs *)PHYSUBA0)->uba_dpr[bdp] |= BNE;
        !            41: }

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