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

1.1       root        1: /* dsread.c - dsread */
                      2: 
                      3: #include <conf.h>
                      4: #include <kernel.h>
                      5: #include <proc.h>
                      6: #include <disk.h>
                      7: 
                      8: /*------------------------------------------------------------------------
                      9:  *  dsread  --  read a block from a disk device
                     10:  *------------------------------------------------------------------------
                     11:  */
                     12: dsread(devptr, buff, block)
                     13:        struct  devsw   *devptr;
                     14:        char    *buff;
                     15:        DBADDR  block;
                     16: {
                     17:        struct  dreq    *drptr;
                     18:        int     stat;
                     19:        char    ps;
                     20: 
                     21:        disable(ps);
                     22:        drptr = (struct dreq *) getbuf(dskrbp);
                     23:        drptr->drdba = block;
                     24:        drptr->drpid = currpid;
                     25:        drptr->drbuff = buff;
                     26:        drptr->drop = DREAD;
                     27:        if ( (stat=dskenq(drptr, devptr->dvioblk)) == DONQ) {
                     28:                suspend(currpid);
                     29:                stat = drptr->drstat;
                     30:        }
                     31:        freebuf(drptr);
                     32:        restore(ps);
                     33:        return(stat);
                     34: }

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