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Annotation of 43BSDTahoe/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       7.4 (Berkeley) 7/9/88
                      7:  */
                      8: 
                      9: #include "param.h"
                     10: #include "inode.h"
                     11: #include "vm.h"
                     12: #include "fs.h"
                     13: 
                     14: #include "../vax/pte.h"
                     15: #include "../vax/cpu.h"
                     16: #include "../vaxuba/ubareg.h"
                     17: 
                     18: #include "saio.h"
                     19: #include "savax.h"
                     20: 
                     21: /*
                     22:  * Note... this routine does not
                     23:  * really allocate; unless bdp == 2
                     24:  * you always get the same space.
                     25:  * When bdp == 2 you get some other space.
                     26:  */
                     27: ubasetup(io, bdp)
                     28:        register struct iob *io;
                     29:        int bdp;
                     30: {
                     31:        int npf;
                     32:        unsigned int v;
                     33:        register struct pte *pte;
                     34:        int o, temp, reg;
                     35:        static int lastreg = 128+64;
                     36: 
                     37:        v = btop(io->i_ma);
                     38:        o = (int)io->i_ma & PGOFSET;
                     39:        npf = btoc(io->i_cc + o) +1;
                     40:        if (bdp == 2) {
                     41:                reg = lastreg;
                     42:                lastreg += npf;
                     43:                bdp = 0;
                     44:        } else
                     45:                reg = 0;
                     46:        pte = &ubauba(io->i_adapt)->uba_map[reg];
                     47:        temp = (bdp << 21) | UBAMR_MRV;
                     48:        if (bdp && (o & 01))
                     49:                temp |= UBAMR_BO;
                     50:        v &= 0x1fffff;                  /* drop to physical addr */
                     51:        while (--npf != 0)
                     52:                *(int *)pte++ = v++ | temp;
                     53:        *(int *)pte++ = 0;
                     54:        return ((bdp << 28) | (reg << 9) | o);
                     55: }
                     56: 
                     57: ubafree(io, mr)
                     58:        struct iob *io;
                     59:        int mr;
                     60: {
                     61:        register int bdp;
                     62:  
                     63:        bdp = (mr >> 28) & 0x0f;
                     64:        if (bdp == 0)
                     65:                return;
                     66:        switch (cpu) {
                     67: 
                     68: #if VAX8200
                     69:        case VAX_8200:
                     70:                UBA_PURGEBUA(ubauba(io->i_adapt), bdp);
                     71:                break;
                     72: #endif
                     73: 
                     74: #if VAX780 || VAX8600
                     75:        case VAX_8600:
                     76:        case VAX_780:
                     77:                ubauba(io->i_adapt)->uba_dpr[bdp] |= UBADPR_BNE;
                     78:                break;
                     79: #endif
                     80: 
                     81: #if VAX750
                     82:        case VAX_750:
                     83:                ubauba(io->i_adapt)->uba_dpr[bdp] |=
                     84:                     UBADPR_PURGE|UBADPR_NXM|UBADPR_UCE;
                     85:                break;
                     86: #endif
                     87: 
                     88:        default:
                     89:                break;
                     90:        }
                     91: }

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