target/linux/rdc/files-2.6.30/arch/x86/mach-rdc321x/reboot.c

   1 /*
   2  *  This program is free software; you can redistribute it and/or
   3  *  modify it under the terms of the GNU General Public License
   4  *  as published by the Free Software Foundation; either version 2
   5  *  of the License, or (at your option) any later version.
   6  *
   7  *  This program is distributed in the hope that it will be useful,
   8  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  *  GNU General Public License for more details.
  11  *
  12  *  You should have received a copy of the GNU General Public License
  13  *  along with this program; if not, write to the
  14  *  Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  15  *  Boston, MA  02110-1301, USA.
  16  *
  17  */
  18
  19 #include <asm/reboot.h>
  20 #include <asm/io.h>
  21
  22 static void rdc321x_reset(void)
  23 {
  24         unsigned i;
  25
  26         /* write to southbridge config register 0x41
  27            enable pci reset on cpu reset, make internal port 0x92 writeable
  28            and switch port 0x92 to internal */
  29         outl(0x80003840, 0xCF8);
  30         i = inl(0xCFC);
  31         i |= 0x1600;
  32         outl(i, 0xCFC);
  33
  34         /* soft reset */
  35         outb(1, 0x92);
  36 }
  37
  38 static int __init rdc_setup_reset(void)
  39 {
  40         machine_ops.emergency_restart = rdc321x_reset;
  41         return 0;
  42 }
  43
  44 arch_initcall(rdc_setup_reset);