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Annotation of xinu/sys/LSI/dsinter.c, revision 1.1.1.1

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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