release/src-rt-6.x.4708/linux/linux-2.6.36/arch/powerpc/kernel/swsusp.c

   1 /*
   2  * Common powerpc suspend code for 32 and 64 bits
   3  *
   4  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  */
  11
  12 #include <linux/sched.h>
  13 #include <asm/suspend.h>
  14 #include <asm/system.h>
  15 #include <asm/current.h>
  16 #include <asm/mmu_context.h>
  17
  18 void save_processor_state(void)
  19 {
  20         /*
  21          * flush out all the special registers so we don't need
  22          * to save them in the snapshot
  23          */
  24         flush_fp_to_thread(current);
  25         flush_altivec_to_thread(current);
  26         flush_spe_to_thread(current);
  27
  28 #ifdef CONFIG_PPC64
  29         hard_irq_disable();
  30 #endif
  31
  32 }
  33
  34 void restore_processor_state(void)
  35 {
  36 #ifdef CONFIG_PPC32
  37         switch_mmu_context(NULL, current->active_mm);
  38 #endif
  39 }