sys/boot/efi/libefi/efi_console.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/efi/libefi/efi_console.c,v 1.1 2003/11/10 06:08:33 dillon Exp $
  27  */
  28
  29 #include <efi.h>
  30 #include <efilib.h>
  31
  32 #include "bootstrap.h"
  33
  34 static SIMPLE_TEXT_OUTPUT_INTERFACE     *conout;
  35 static SIMPLE_INPUT_INTERFACE           *conin;
  36
  37 static void
  38 efi_cons_probe(struct console *cp)
  39 {
  40         conout = ST->ConOut;
  41         conin = ST->ConIn;
  42         cp->c_flags |= C_PRESENTIN | C_PRESENTOUT;
  43 }
  44
  45 static int
  46 efi_cons_init(int arg)
  47 {
  48         return 0;
  49 }
  50
  51 void
  52 efi_cons_putchar(int c)
  53 {
  54         CHAR16 buf[2];
  55
  56         if (c == '\n')
  57                 efi_cons_putchar('\r');
  58
  59         buf[0] = c;
  60         buf[1] = 0;
  61
  62         conout->OutputString(conout, buf);
  63 }
  64
  65 int
  66 efi_cons_getchar()
  67 {
  68         EFI_INPUT_KEY key;
  69         EFI_STATUS status;
  70         UINTN junk;
  71
  72         /* Try to read a key stroke. We wait for one if none is pending. */
  73         status = conin->ReadKeyStroke(conin, &key);
  74         if (status == EFI_NOT_READY) {
  75                 BS->WaitForEvent(1, &conin->WaitForKey, &junk);
  76                 status = conin->ReadKeyStroke(conin, &key);
  77         }
  78         return (key.UnicodeChar);
  79 }
  80
  81 int
  82 efi_cons_poll()
  83 {
  84         /* This can clear the signaled state. */
  85         return (BS->CheckEvent(conin->WaitForKey) == EFI_SUCCESS);
  86 }
  87
  88 struct console efi_console = {
  89         "efi",
  90         "EFI console",
  91         0,
  92         efi_cons_probe,
  93         efi_cons_init,
  94         efi_cons_putchar,
  95         efi_cons_getchar,
  96         efi_cons_poll
  97 };