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Annotation of 43BSDReno/sys/vaxstand/uba.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1982, 1986, 1988 Regents of the University of California.
                      3:  * All rights reserved.  The Berkeley software License Agreement
                      4:  * specifies the terms and conditions for redistribution.
                      5:  *
                      6:  *     @(#)uba.c       7.5 (Berkeley) 4/4/90
                      7:  */
                      8: 
                      9: #include "param.h"
                     10: #include "vm.h"
                     11: 
                     12: #include "../vax/pte.h"
                     13: #include "../vax/cpu.h"
                     14: #include "../vaxuba/ubareg.h"
                     15: 
                     16: #include "saio.h"
                     17: #include "savax.h"
                     18: 
                     19: /*
                     20:  * Note... this routine does not
                     21:  * really allocate; unless bdp == 2
                     22:  * you always get the same space.
                     23:  * When bdp == 2 you get some other space.
                     24:  */
                     25: ubasetup(io, bdp)
                     26:        register struct iob *io;
                     27:        int bdp;
                     28: {
                     29:        int npf;
                     30:        unsigned int v;
                     31:        register struct pte *pte;
                     32:        int o, temp, reg;
                     33:        static int lastreg = 128+64;
                     34: 
                     35:        v = btop(io->i_ma);
                     36:        o = (int)io->i_ma & PGOFSET;
                     37:        npf = btoc(io->i_cc + o) +1;
                     38:        if (bdp == 2) {
                     39:                reg = lastreg;
                     40:                lastreg += npf;
                     41:                bdp = 0;
                     42:        } else
                     43:                reg = 0;
                     44:        pte = &ubauba(io->i_adapt)->uba_map[reg];
                     45:        temp = (bdp << 21) | UBAMR_MRV;
                     46:        if (bdp && (o & 01))
                     47:                temp |= UBAMR_BO;
                     48:        v &= 0x1fffff;                  /* drop to physical addr */
                     49:        while (--npf != 0)
                     50:                *(int *)pte++ = v++ | temp;
                     51:        *(int *)pte++ = 0;
                     52:        return ((bdp << 28) | (reg << 9) | o);
                     53: }
                     54: 
                     55: ubafree(io, mr)
                     56:        struct iob *io;
                     57:        int mr;
                     58: {
                     59:        register int bdp;
                     60:  
                     61:        bdp = (mr >> 28) & 0x0f;
                     62:        if (bdp == 0)
                     63:                return;
                     64:        switch (cpu) {
                     65: 
                     66: #if VAX8200
                     67:        case VAX_8200:
                     68:                UBA_PURGEBUA(ubauba(io->i_adapt), bdp);
                     69:                break;
                     70: #endif
                     71: 
                     72: #if VAX780 || VAX8600
                     73:        case VAX_8600:
                     74:        case VAX_780:
                     75:                ubauba(io->i_adapt)->uba_dpr[bdp] |= UBADPR_BNE;
                     76:                break;
                     77: #endif
                     78: 
                     79: #if VAX750
                     80:        case VAX_750:
                     81:                ubauba(io->i_adapt)->uba_dpr[bdp] |=
                     82:                     UBADPR_PURGE|UBADPR_NXM|UBADPR_UCE;
                     83:                break;
                     84: #endif
                     85: 
                     86:        default:
                     87:                break;
                     88:        }
                     89: }

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