arch/mips/gt64120/wrppmc/reset.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 1997 Ralf Baechle
   7  */
   8 #include <linux/kernel.h>
   9
  10 #include <asm/cacheflush.h>
  11 #include <asm/mipsregs.h>
  12
  13 void wrppmc_machine_restart(char *command)
  14 {
  15         /*
  16          * Ouch, we're still alive ... This time we take the silver bullet ...
  17          * ... and find that we leave the hardware in a state in which the
  18          * kernel in the flush locks up somewhen during of after the PCI
  19          * detection stuff.
  20          */
  21         local_irq_disable();
  22         set_c0_status(ST0_BEV | ST0_ERL);
  23         change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
  24         flush_cache_all();
  25         write_c0_wired(0);
  26         __asm__ __volatile__("jr\t%0"::"r"(0xbfc00000));
  27 }
  28
  29 void wrppmc_machine_halt(void)
  30 {
  31         local_irq_disable();
  32
  33         printk(KERN_NOTICE "You can safely turn off the power\n");
  34         while (1) {
  35                 __asm__(
  36                         ".set\tmips3\n\t"
  37                         "wait\n\t"
  38                         ".set\tmips0"
  39                 );
  40         }
  41 }
  42
  43 void wrppmc_machine_power_off(void)
  44 {
  45         wrppmc_machine_halt();
  46 }