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

1.1       root        1: /*     uba.c   4.5     81/11/12        */
                      2: 
                      3: #include "../h/param.h"
                      4: #include "../h/inode.h"
                      5: #include "../h/cpu.h"
                      6: #include "../h/pte.h"
                      7: #include "../h/ubareg.h"
                      8: #include "../h/vm.h"
                      9: #include "saio.h"
                     10: #include "savax.h"
                     11: 
                     12: /*
                     13:  * Note... this routine does not
                     14:  * really allocate; unless bdp == 2
                     15:  * you always get the same space.
                     16:  * When bdp == 2 you get some other space.
                     17:  */
                     18: ubasetup(io, bdp)
                     19:        register struct iob *io;
                     20:        int bdp;
                     21: {
                     22:        int npf;
                     23:        unsigned v;
                     24:        register struct pte *pte;
                     25:        int o, temp, reg;
                     26:        static int lastreg = 128+64;
                     27: 
                     28:        v = btop(io->i_ma);
                     29:        o = (int)io->i_ma & PGOFSET;
                     30:        npf = btoc(io->i_cc + o) +1;
                     31:        if (bdp == 2) {
                     32:                reg = lastreg;
                     33:                lastreg += npf;
                     34:                bdp = 0;
                     35:        } else
                     36:                reg = 0;
                     37:        pte = &ubauba(io->i_unit)->uba_map[reg];
                     38:        temp = (bdp << 21) | UBAMR_MRV;
                     39:        if (bdp && (o & 01))
                     40:                temp |= UBAMR_BO;
                     41:        v &= 0x1fffff;                  /* drop to physical addr */
                     42:        while (--npf != 0)
                     43:                *(int *)pte++ = v++ | temp;
                     44:        *(int *)pte++ = 0;
                     45:        return ((bdp << 28) | (reg << 9) | o);
                     46: }
                     47: 
                     48: ubafree(io, mr)
                     49:        struct iob *io;
                     50:        int mr;
                     51: {
                     52:        register int bdp;
                     53:  
                     54:        bdp = (mr >> 28) & 0x0f;
                     55:        if (bdp == 0)
                     56:                return;
                     57:        switch (cpu) {
                     58: 
                     59:        case VAX_780:
                     60:                ubauba(io->i_unit)->uba_dpr[bdp] |= UBADPR_BNE;
                     61:                break;
                     62: 
                     63:        case VAX_750:
                     64:                ubauba(io->i_unit)->uba_dpr[bdp] |=
                     65:                     UBADPR_PURGE|UBADPR_NXM|UBADPR_UCE;
                     66:                break;
                     67:        case VAX_7ZZ:
                     68:                break;
                     69:        }
                     70: }

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