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skiconsole.c revision 1.4 
      1 /*	$NetBSD: skiconsole.c,v 1.4 2009/07/20 04:59:04 kiyohara 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 #include <lib/libsa/loadfile.h>
     33 
     34 #include "bootstrap.h"
     35 #include "libski.h"
     36 
     37 static void
     38 ski_cons_probe(struct console *cp)
     39 {
     40 	cp->c_flags |= C_PRESENTIN | C_PRESENTOUT;
     41 }
     42 
     43 static int
     44 ski_cons_init(int arg)
     45 {
     46 	ssc(0, 0, 0, 0, SSC_CONSOLE_INIT);
     47 	return 0;
     48 }
     49 
     50 void
     51 ski_cons_putchar(int c)
     52 {
     53 	ssc(c, 0, 0, 0, SSC_PUTCHAR);
     54 }
     55 
     56 static int pollchar = -1;
     57 
     58 int
     59 ski_cons_getchar(void)
     60 {
     61 	int c;
     62 
     63 	if (pollchar > 0) {
     64 		c = pollchar;
     65 		pollchar = -1;
     66 		return c;
     67 	}
     68 
     69 	do {
     70 		c = ssc(0, 0, 0, 0, SSC_GETCHAR);
     71 	} while (c == 0);
     72 
     73 	return c;
     74 }
     75 
     76 int
     77 ski_cons_poll(void)
     78 {
     79 	int c;
     80 	if (pollchar > 0)
     81 		return 1;
     82 	c = ssc(0, 0, 0, 0, SSC_GETCHAR);
     83 	if (!c)
     84 		return 0;
     85 	pollchar = c;
     86 	return 1;
     87 }
     88 
     89 struct console ski_console = {
     90 	"ski",
     91 	"ia64 SKI console",
     92 	0,
     93 	ski_cons_probe,
     94 	ski_cons_init,
     95 	ski_cons_putchar,
     96 	ski_cons_getchar,
     97 	ski_cons_poll
     98 };
     99