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Annotation of Net2/arch/hp300/stand/cons.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1988 University of Utah.
        !             3:  * Copyright (c) 1990 The Regents of the University of California.
        !             4:  * All rights reserved.
        !             5:  *
        !             6:  * This code is derived from software contributed to Berkeley by
        !             7:  * the Systems Programming Group of the University of Utah Computer
        !             8:  * Science Department.
        !             9:  *
        !            10:  * Redistribution and use in source and binary forms, with or without
        !            11:  * modification, are permitted provided that the following conditions
        !            12:  * are met:
        !            13:  * 1. Redistributions of source code must retain the above copyright
        !            14:  *    notice, this list of conditions and the following disclaimer.
        !            15:  * 2. Redistributions in binary form must reproduce the above copyright
        !            16:  *    notice, this list of conditions and the following disclaimer in the
        !            17:  *    documentation and/or other materials provided with the distribution.
        !            18:  * 3. All advertising materials mentioning features or use of this software
        !            19:  *    must display the following acknowledgement:
        !            20:  *     This product includes software developed by the University of
        !            21:  *     California, Berkeley and its contributors.
        !            22:  * 4. Neither the name of the University nor the names of its contributors
        !            23:  *    may be used to endorse or promote products derived from this software
        !            24:  *    without specific prior written permission.
        !            25:  *
        !            26:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            28:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            29:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            30:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            31:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            32:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            33:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            34:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            35:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            36:  * SUCH DAMAGE.
        !            37:  *
        !            38:  * from: Utah $Hdr: cons.c 1.5 89/08/22$
        !            39:  *
        !            40:  *     @(#)cons.c      7.4 (Berkeley) 5/5/91
        !            41:  */
        !            42: 
        !            43: #include "sys/param.h"
        !            44: #include "samachdep.h"
        !            45: #include "../hp300/cons.h"
        !            46: 
        !            47: #ifdef ITECONSOLE
        !            48: int    iteprobe(), iteinit(), itegetchar(), iteputchar();
        !            49: #endif
        !            50: #ifdef DCACONSOLE
        !            51: int    dcaprobe(), dcainit(), dcagetchar(), dcaputchar();
        !            52: #endif
        !            53: #ifdef DCMCONSOLE
        !            54: int    dcmprobe(), dcminit(), dcmgetchar(), dcmputchar();
        !            55: #endif
        !            56: 
        !            57: struct consdev constab[] = {
        !            58: #ifdef ITECONSOLE
        !            59:        { iteprobe,     iteinit,        itegetchar,     iteputchar },
        !            60: #endif
        !            61: #ifdef DCACONSOLE
        !            62:        { dcaprobe,     dcainit,        dcagetchar,     dcaputchar },
        !            63: #endif
        !            64: #ifdef DCMCONSOLE
        !            65:        { dcmprobe,     dcminit,        dcmgetchar,     dcmputchar },
        !            66: #endif
        !            67:        { 0 },
        !            68: };
        !            69: 
        !            70: struct consdev *cn_tab;
        !            71: int noconsole;
        !            72: 
        !            73: cninit()
        !            74: {
        !            75:        register struct consdev *cp;
        !            76: 
        !            77:        cn_tab = NULL;
        !            78:        noconsole = 1;
        !            79:        for (cp = constab; cp->cn_probe; cp++) {
        !            80:                (*cp->cn_probe)(cp);
        !            81:                if (cp->cn_pri > CN_DEAD &&
        !            82:                    (cn_tab == NULL || cp->cn_pri > cn_tab->cn_pri))
        !            83:                        cn_tab = cp;
        !            84:        }
        !            85:        if (cn_tab) {
        !            86:                (*cn_tab->cn_init)(cn_tab);
        !            87:                noconsole = 0;
        !            88:        }
        !            89: }
        !            90: 
        !            91: cngetc()
        !            92: {
        !            93:        if (cn_tab)
        !            94:                return((*cn_tab->cn_getc)());
        !            95:        return(0);
        !            96: }
        !            97: 
        !            98: cnputc(c)
        !            99:        int c;
        !           100: {
        !           101:        if (cn_tab)
        !           102:                (*cn_tab->cn_putc)(c);
        !           103: }

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