arch/sparc/power/hibernate.c

   1 /*
   2  * hibernate.c:  Hibernaton support specific for sparc64.
   3  *
   4  * Copyright (C) 2013 Kirill V Tkhai (tkhai@yandex.ru)
   5  */
   6
   7 #include <linux/mm.h>
   8
   9 #include <asm/hibernate.h>
  10 #include <asm/visasm.h>
  11 #include <asm/page.h>
  12 #include <asm/sections.h>
  13 #include <asm/tlb.h>
  14
  15 struct saved_context saved_context;
  16
  17 /*
  18  *      pfn_is_nosave - check if given pfn is in the 'nosave' section
  19  */
  20
  21 int pfn_is_nosave(unsigned long pfn)
  22 {
  23         unsigned long nosave_begin_pfn = PFN_DOWN((unsigned long)&__nosave_begin);
  24         unsigned long nosave_end_pfn = PFN_DOWN((unsigned long)&__nosave_end);
  25
  26         return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
  27 }
  28
  29 void save_processor_state(void)
  30 {
  31         save_and_clear_fpu();
  32 }
  33
  34 void restore_processor_state(void)
  35 {
  36         struct mm_struct *mm = current->active_mm;
  37
  38         tsb_context_switch_ctx(mm, CTX_HWBITS(mm->context));
  39 }