libx/base/xinit.c

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2007  Tomas 'ZeXx86' Jedrzejek (zexx86@gmail.com)
   4  *  Copyright (C) 2008  Tomas 'ZeXx86' Jedrzejek (zexx86@gmail.com)
   5  *
   6  *  This program is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <libx/base.h>
  21
  22 void xinit ()
  23 {
  24         asm volatile (
  25                 "movl $34, %%eax;"
  26                 "int $0x80;"
  27                 "movl %%eax, %0;"
  28                 : "=b" (vgadb) :: "%eax");
  29
  30         unsigned *grub_baseaddr = (unsigned *) 0x60000;
  31
  32         vgafb = (unsigned short *) *grub_baseaddr;
  33
  34         if (!vgadb)
  35                 vgadb = vgafb;
  36
  37         vgafb_res_x = 800;
  38         vgafb_res_y = 600;
  39 }