sys/boot/ia64/libski/skiconsole.c

   1 /*-
   2  * Copyright (c) 2000 Doug Rabson
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $DragonFly: src/sys/boot/ia64/libski/skiconsole.c,v 1.1 2003/11/10 06:08:37 dillon Exp $
  27  */
  28
  29 #include <stand.h>
  30
  31 #include "bootstrap.h"
  32 #include "libski.h"
  33
  34 static void
  35 ski_cons_probe(struct console *cp)
  36 {
  37         cp->c_flags |= C_PRESENTIN | C_PRESENTOUT;
  38 }
  39
  40 static int
  41 ski_cons_init(int arg)
  42 {
  43         ssc(0, 0, 0, 0, SSC_CONSOLE_INIT);
  44         return 0;
  45 }
  46
  47 void
  48 ski_cons_putchar(int c)
  49 {
  50         ssc(c, 0, 0, 0, SSC_PUTCHAR);
  51 }
  52
  53 static int pollchar = -1;
  54
  55 int
  56 ski_cons_getchar()
  57 {
  58         int c;
  59
  60         if (pollchar > 0) {
  61                 c = pollchar;
  62                 pollchar = -1;
  63                 return c;
  64         }
  65
  66         do {
  67                 c = ssc(0, 0, 0, 0, SSC_GETCHAR);
  68         } while (c == 0);
  69
  70         return c;
  71 }
  72
  73 int
  74 ski_cons_poll()
  75 {
  76         int c;
  77         if (pollchar > 0)
  78                 return 1;
  79         c = ssc(0, 0, 0, 0, SSC_GETCHAR);
  80         if (!c)
  81                 return 0;
  82         pollchar = c;
  83         return 1;
  84 }
  85
  86 struct console ski_console = {
  87         "ski",
  88         "ia64 SKI console",
  89         0,
  90         ski_cons_probe,
  91         ski_cons_init,
  92         ski_cons_putchar,
  93         ski_cons_getchar,
  94         ski_cons_poll
  95 };