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Annotation of 41BSD/sys/stand/uba.c, revision 1.1.1.1

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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