LXR linux/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/current.h>
  14#include <asm/mmu_context.h>
  15#include <asm/switch_to.h>
  16
  17void save_processor_state(void)
  18{
  19        /*
  20         * flush out all the special registers so we don't need
  21         * to save them in the snapshot
  22         */
  23        flush_fp_to_thread(current);
  24        flush_altivec_to_thread(current);
  25        flush_spe_to_thread(current);
  26
  27#ifdef CONFIG_PPC64
  28        hard_irq_disable();
  29#endif
  30
  31}
  32
  33void restore_processor_state(void)
  34{
  35#ifdef CONFIG_PPC32
  36        switch_mmu_context(current->active_mm, current->active_mm);
  37#endif
  38}
  39