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skiconsole.c revision 1.2 
      1 /*	$NetBSD: skiconsole.c,v 1.2 2006/04/22 07:58:53 cherry Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2000 Doug Rabson
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 /* __FBSDID("$FreeBSD: src/sys/boot/ia64/libski/skiconsole.c,v 1.2 2003/04/03 21:36:29 obrien Exp $"); */
     31 #include <lib/libsa/stand.h>
     32 
     33 #include "bootstrap.h"
     34 #include "libski.h"
     35 
     36 static void
     37 ski_cons_probe(struct console *cp)
     38 {
     39 	cp->c_flags |= C_PRESENTIN | C_PRESENTOUT;
     40 }
     41 
     42 static int
     43 ski_cons_init(int arg)
     44 {
     45 	ssc(0, 0, 0, 0, SSC_CONSOLE_INIT);
     46 	return 0;
     47 }
     48 
     49 void
     50 ski_cons_putchar(int c)
     51 {
     52 	ssc(c, 0, 0, 0, SSC_PUTCHAR);
     53 }
     54 
     55 static int pollchar = -1;
     56 
     57 int
     58 ski_cons_getchar()
     59 {
     60 	int c;
     61 
     62 	if (pollchar > 0) {
     63 		c = pollchar;
     64 		pollchar = -1;
     65 		return c;
     66 	}
     67 
     68 	do {
     69 		c = ssc(0, 0, 0, 0, SSC_GETCHAR);
     70 	} while (c == 0);
     71 
     72 	return c;
     73 }
     74 
     75 int
     76 ski_cons_poll()
     77 {
     78 	int c;
     79 	if (pollchar > 0)
     80 		return 1;
     81 	c = ssc(0, 0, 0, 0, SSC_GETCHAR);
     82 	if (!c)
     83 		return 0;
     84 	pollchar = c;
     85 	return 1;
     86 }
     87 
     88 struct console ski_console = {
     89 	"ski",
     90 	"ia64 SKI console",
     91 	0,
     92 	ski_cons_probe,
     93 	ski_cons_init,
     94 	ski_cons_putchar,
     95 	ski_cons_getchar,
     96 	ski_cons_poll
     97 };
     98