arch/mips/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/irqflags.h>
   9 #include <linux/kernel.h>
  10
  11 #include <asm/cacheflush.h>
  12 #include <asm/mipsregs.h>
  13 #include <asm/processor.h>
  14
  15 void wrppmc_machine_restart(char *command)
  16 {
  17         /*
  18          * Ouch, we're still alive ... This time we take the silver bullet ...
  19          * ... and find that we leave the hardware in a state in which the
  20          * kernel in the flush locks up somewhen during of after the PCI
  21          * detection stuff.
  22          */
  23         local_irq_disable();
  24         set_c0_status(ST0_BEV | ST0_ERL);
  25         change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
  26         flush_cache_all();
  27         write_c0_wired(0);
  28         __asm__ __volatile__("jr\t%0"::"r"(0xbfc00000));
  29 }
  30
  31 void wrppmc_machine_halt(void)
  32 {
  33         local_irq_disable();
  34
  35         printk(KERN_NOTICE "You can safely turn off the power\n");
  36         while (1) {
  37                 if (cpu_wait)
  38                         cpu_wait();
  39         }
  40 }