arch/mips/galileo-boards/ev96100/reset.c

   1 /*
   2  * BRIEF MODULE DESCRIPTION
   3  *      Galileo EV96100 reset routines.
   4  *
   5  * Copyright 2000 MontaVista Software Inc.
   6  * Author: MontaVista Software, Inc.
   7  *              ppopov@mvista.com or source@mvista.com
   8  *
   9  * This file was derived from Carsten Langgaard's
  10  * arch/mips/mips-boards/generic/reset.c
  11  *
  12  * Carsten Langgaard, carstenl@mips.com
  13  * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
  14  *
  15  *  This program is free software; you can redistribute  it and/or modify it
  16  *  under  the terms of  the GNU General  Public License as published by the
  17  *  Free Software Foundation;  either version 2 of the  License, or (at your
  18  *  option) any later version.
  19  *
  20  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  21  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  22  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  23  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  24  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  25  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  26  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  27  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  28  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  29  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  *
  31  *  You should have received a copy of the  GNU General Public License along
  32  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  33  *  675 Mass Ave, Cambridge, MA 02139, USA.
  34  */
  35 #include <linux/sched.h>
  36 #include <linux/mm.h>
  37 #include <asm/io.h>
  38 #include <asm/pgtable.h>
  39 #include <asm/processor.h>
  40 #include <asm/reboot.h>
  41 #include <asm/system.h>
  42 #include <asm/gt64120.h>
  43
  44 static void mips_machine_restart(char *command);
  45 static void mips_machine_halt(void);
  46
  47 static void mips_machine_restart(char *command)
  48 {
  49         set_c0_status(ST0_BEV | ST0_ERL);
  50         change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
  51         flush_cache_all();
  52         write_c0_wired(0);
  53         __asm__ __volatile__("jr\t%0"::"r"(0xbfc00000));
  54         while (1);
  55 }
  56
  57 static void mips_machine_halt(void)
  58 {
  59         printk(KERN_NOTICE "You can safely turn off the power\n");
  60         while (1)
  61                 __asm__(".set\tmips3\n\t"
  62                         "wait\n\t"
  63                         ".set\tmips0");
  64 }
  65
  66 void mips_reboot_setup(void)
  67 {
  68         _machine_restart = mips_machine_restart;
  69         _machine_halt = mips_machine_halt;
  70 }