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Annotation of xinu/sys/ttyinit.c, revision 1.1.1.1

1.1       root        1: /* ttyinit.c - ttyinit */
                      2: 
                      3: #include <conf.h>
                      4: #include <kernel.h>
                      5: #include <proc.h>
                      6: #include <tty.h>
                      7: #include <io.h>
                      8: #include <slu.h>
                      9: 
                     10: /*------------------------------------------------------------------------
                     11:  *  ttyinit - initialize buffers and modes for a tty line
                     12:  *------------------------------------------------------------------------
                     13:  */
                     14: ttyinit(devptr)
                     15:        struct  devsw   *devptr;
                     16: {
                     17:        register struct tty *iptr;
                     18:        register struct csr *cptr;
                     19:        int      junk, isconsole;
                     20: 
                     21:        /* set up interrupt vector and interrupt dispatch table */
                     22: 
                     23:        iptr = &tty[devptr->dvminor];
                     24:        iosetvec(devptr->dvnum, (int)iptr, (int)iptr);
                     25: 
                     26:        devptr->dvioblk = (char *)iptr;         /* fill tty control blk */
                     27:        isconsole = (devptr->dvnum == CONSOLE); /* make console cooked  */
                     28:        iptr->ioaddr = (struct csr *)devptr->dvcsr;/* copy in csr addr. */
                     29:        iptr->ihead = iptr->itail = 0;          /* empty input queue    */
                     30:        iptr->isem = screate(0);                /* chars. read so far=0 */
                     31:        iptr->osem = screate(OBUFLEN);          /* buffer available=all */
                     32:        iptr->odsend = 0;                       /* sends delayed so far */
                     33:        iptr->ohead = iptr->otail = 0;          /* output queue empty   */
                     34:        iptr->ehead = iptr->etail = 0;          /* echo queue empty     */
                     35:        iptr->imode = (isconsole ? IMCOOKED : IMRAW);
                     36:        iptr->iecho = iptr->evis = isconsole;   /* echo console input   */
                     37:        iptr->ierase = iptr->ieback = isconsole;/* console honors erase */
                     38:        iptr->ierasec = BACKSP;                 /*  using ^h            */
                     39:        iptr->ecrlf = iptr->icrlf = isconsole;  /* map RETURN on input  */
                     40:        iptr->ocrlf = iptr->oflow = isconsole;  /* map RETURN on output */
                     41:        iptr->ieof  = iptr->ikill = isconsole;  /* set line kill=KILLCH */
                     42:        iptr->iintr = FALSE;
                     43:        iptr->iintrc = INTRCH;
                     44:        iptr->iintpid = BADPID;
                     45:        iptr->ikillc = KILLCH;
                     46:        iptr->ieofc = EOFC;
                     47:        iptr->oheld = FALSE;
                     48:        iptr->ostart = STRTCH;
                     49:        iptr->ostop = STOPCH;
                     50:        iptr->icursor = 0;
                     51:        iptr->ifullc = TFULLC;
                     52:        cptr = (struct csr *)devptr->dvcsr;
                     53:        junk = cptr->crbuf;                     /* clear receiver and   */
                     54:        cptr->crstat = SLUENABLE;               /* enable in. interrupts*/
                     55:        cptr->ctstat = SLUDISABLE;              /* disable out.   "     */
                     56: }

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