Return to uba.c CVS log

Up to [CSRG BSD Unix] / 42BSD / sys / stand

Annotation of 42BSD/sys/stand/uba.c, revision 1.1

1.1     ! root        1: /*     uba.c   6.1     83/07/29        */
        !             2: 
        !             3: #include "../machine/pte.h"
        !             4: 
        !             5: #include "../h/param.h"
        !             6: #include "../h/inode.h"
        !             7: #include "../h/vm.h"
        !             8: #include "../h/fs.h"
        !             9: 
        !            10: #include "../vax/cpu.h"
        !            11: #include "../vaxuba/ubareg.h"
        !            12: 
        !            13: #include "saio.h"
        !            14: #include "savax.h"
        !            15: 
        !            16: /*
        !            17:  * Note... this routine does not
        !            18:  * really allocate; unless bdp == 2
        !            19:  * you always get the same space.
        !            20:  * When bdp == 2 you get some other space.
        !            21:  */
        !            22: ubasetup(io, bdp)
        !            23:        register struct iob *io;
        !            24:        int bdp;
        !            25: {
        !            26:        int npf;
        !            27:        unsigned v;
        !            28:        register struct pte *pte;
        !            29:        int o, temp, reg;
        !            30:        static int lastreg = 128+64;
        !            31: 
        !            32:        v = btop(io->i_ma);
        !            33:        o = (int)io->i_ma & PGOFSET;
        !            34:        npf = btoc(io->i_cc + o) +1;
        !            35:        if (bdp == 2) {
        !            36:                reg = lastreg;
        !            37:                lastreg += npf;
        !            38:                bdp = 0;
        !            39:        } else
        !            40:                reg = 0;
        !            41:        pte = &ubauba(io->i_unit)->uba_map[reg];
        !            42:        temp = (bdp << 21) | UBAMR_MRV;
        !            43:        if (bdp && (o & 01))
        !            44:                temp |= UBAMR_BO;
        !            45:        v &= 0x1fffff;                  /* drop to physical addr */
        !            46:        while (--npf != 0)
        !            47:                *(int *)pte++ = v++ | temp;
        !            48:        *(int *)pte++ = 0;
        !            49:        return ((bdp << 28) | (reg << 9) | o);
        !            50: }
        !            51: 
        !            52: ubafree(io, mr)
        !            53:        struct iob *io;
        !            54:        int mr;
        !            55: {
        !            56:        register int bdp;
        !            57:  
        !            58:        bdp = (mr >> 28) & 0x0f;
        !            59:        if (bdp == 0)
        !            60:                return;
        !            61:        switch (cpu) {
        !            62: 
        !            63:        case VAX_780:
        !            64:                ubauba(io->i_unit)->uba_dpr[bdp] |= UBADPR_BNE;
        !            65:                break;
        !            66: 
        !            67:        case VAX_750:
        !            68:                ubauba(io->i_unit)->uba_dpr[bdp] |=
        !            69:                     UBADPR_PURGE|UBADPR_NXM|UBADPR_UCE;
        !            70:                break;
        !            71:        case VAX_730:
        !            72:                break;
        !            73:        }
        !            74: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.