src/cpu/amd/model_lx/syspreinit.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2006 Indrek Kruusa <indrek.kruusa@artecdesign.ee>
   5  * Copyright (C) 2006 Ronald G. Minnich <rminnich@gmail.com>
   6  * Copyright (C) 2007 Advanced Micro Devices, Inc.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  21  */
  22
  23 /* ***************************************************************************/
  24 /* **/
  25 /* *    StartTimer1*/
  26 /* **/
  27 /* *    Entry: none*/
  28 /* *    Exit: Starts Timer 1 for port 61 use*/
  29 /* *    Destroys: Al,*/
  30 /* **/
  31 /* ***************************************************************************/
  32 static void StartTimer1(void)
  33 {
  34         outb(0x56, 0x43);
  35         outb(0x12, 0x41);
  36 }
  37
  38 void SystemPreInit(void)
  39 {
  40
  41         /* they want a jump ... */
  42 #ifndef CONFIG_CACHE_AS_RAM
  43         __asm__ __volatile__("jmp .+2\ninvd\njmp .+2\n");
  44 #endif
  45         StartTimer1();
  46 }