arch/powerpc/kernel/swsusp.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Common powerpc suspend code for 32 and 64 bits
   4  *
   5  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   6  */
   7
   8 #include <linux/sched.h>
   9 #include <linux/suspend.h>
  10 #include <asm/current.h>
  11 #include <asm/mmu_context.h>
  12 #include <asm/switch_to.h>
  13
  14 void save_processor_state(void)
  15 {
  16         /*
  17          * flush out all the special registers so we don't need
  18          * to save them in the snapshot
  19          */
  20         flush_all_to_thread(current);
  21
  22 #ifdef CONFIG_PPC64
  23         hard_irq_disable();
  24 #endif
  25
  26 }
  27
  28 void restore_processor_state(void)
  29 {
  30 #ifdef CONFIG_PPC32
  31         switch_mmu_context(current->active_mm, current->active_mm, NULL);
  32 #endif
  33 }