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Annotation of xinu/sys/LSI/dsinter.c, revision 1.1

1.1     ! root        1: /* dsinter.c - dsinter */
        !             2: 
        !             3: #include <conf.h>
        !             4: #include <kernel.h>
        !             5: #include <disk.h>
        !             6: 
        !             7: /*------------------------------------------------------------------------
        !             8:  *  dsinter  --  process disk interrupt (DTC interface; XEBEC controller)
        !             9:  *------------------------------------------------------------------------
        !            10:  */
        !            11: INTPROC        dsinter(dsptr)
        !            12:        struct  dsblk   *dsptr;
        !            13: {
        !            14:        struct  dtc     *dtptr;
        !            15:        struct  dreq    *drptr;
        !            16: 
        !            17:        dtptr = dsptr->dcsr;
        !            18:        drptr = dsptr->dreqlst;
        !            19:        if (drptr == DRNULL) {
        !            20:                panic("Disk interrupt when disk not busy");
        !            21:                return;
        !            22:        }
        !            23:        if (dtptr->dt_csr & DTERROR)
        !            24:                drptr->drstat = SYSERR;
        !            25:        else
        !            26:                drptr->drstat = OK;
        !            27:        if ( (dsptr->dreqlst=drptr->drnext) != DRNULL)
        !            28:                dskstrt(dsptr);
        !            29:        switch (drptr->drop) {
        !            30: 
        !            31:                case DREAD:
        !            32:                case DSYNC:
        !            33:                        ready(drptr->drpid, RESCHYES);
        !            34:                        return;
        !            35: 
        !            36:                case DWRITE:
        !            37:                        freebuf(drptr->drbuff);
        !            38:                        /* fall through */
        !            39:                case DSEEK:
        !            40:                        freebuf(drptr);
        !            41:        }
        !            42: }

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