grub-core/term/i386/pc/console.c

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 2002,2003,2005,2007,2008,2009  Free Software Foundation, Inc.
   4  *
   5  *  GRUB is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  GRUB is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <grub/machine/memory.h>
  20 #include <grub/machine/console.h>
  21 #include <grub/term.h>
  22 #include <grub/types.h>
  23
  24 static const struct grub_machine_bios_data_area *bios_data_area =
  25   (struct grub_machine_bios_data_area *) GRUB_MEMORY_MACHINE_BIOS_DATA_AREA_ADDR;
  26
  27 #define KEYBOARD_LEFT_SHIFT     (1 << 0)
  28 #define KEYBOARD_RIGHT_SHIFT    (1 << 1)
  29 #define KEYBOARD_CTRL           (1 << 2)
  30 #define KEYBOARD_ALT            (1 << 3)
  31
  32 static int
  33 grub_console_getkeystatus (struct grub_term_input *term __attribute__ ((unused)))
  34 {
  35   grub_uint8_t status = bios_data_area->keyboard_flag_lower;
  36   int mods = 0;
  37
  38   if (status & (KEYBOARD_LEFT_SHIFT | KEYBOARD_RIGHT_SHIFT))
  39     mods |= GRUB_TERM_STATUS_SHIFT;
  40   if (status & KEYBOARD_CTRL)
  41     mods |= GRUB_TERM_STATUS_CTRL;
  42   if (status & KEYBOARD_ALT)
  43     mods |= GRUB_TERM_STATUS_ALT;
  44
  45   return mods;
  46 }
  47
  48 static struct grub_term_input grub_console_term_input =
  49   {
  50     .name = "console",
  51     .checkkey = grub_console_checkkey,
  52     .getkey = grub_console_getkey,
  53     .getkeystatus = grub_console_getkeystatus,
  54   };
  55
  56 static struct grub_term_output grub_console_term_output =
  57   {
  58     .name = "console",
  59     .putchar = grub_console_putchar,
  60     .getwh = grub_console_getwh,
  61     .getxy = grub_console_getxy,
  62     .gotoxy = grub_console_gotoxy,
  63     .cls = grub_console_cls,
  64     .setcolorstate = grub_console_setcolorstate,
  65     .setcursor = grub_console_setcursor,
  66     .flags = GRUB_TERM_CODE_TYPE_CP437,
  67     .normal_color = GRUB_TERM_DEFAULT_NORMAL_COLOR,
  68     .highlight_color = GRUB_TERM_DEFAULT_HIGHLIGHT_COLOR,
  69   };
  70
  71 void
  72 grub_console_init (void)
  73 {
  74   grub_term_register_output ("console", &grub_console_term_output);
  75   grub_term_register_input ("console", &grub_console_term_input);
  76 }
  77
  78 void
  79 grub_console_fini (void)
  80 {
  81   grub_term_unregister_input (&grub_console_term_input);
  82   grub_term_unregister_output (&grub_console_term_output);
  83 }