arch/sparc/power/hibernate.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * hibernate.c:  Hibernaton support specific for sparc64.
   4  *
   5  * Copyright (C) 2013 Kirill V Tkhai ([email protected])
   6  */
   7
   8 #include <linux/suspend.h>
   9 #include <linux/mm.h>
  10
  11 #include <asm/hibernate.h>
  12 #include <asm/visasm.h>
  13 #include <asm/page.h>
  14 #include <asm/sections.h>
  15 #include <asm/tlb.h>
  16
  17 struct saved_context saved_context;
  18
  19 /*
  20  *      pfn_is_nosave - check if given pfn is in the 'nosave' section
  21  */
  22
  23 int pfn_is_nosave(unsigned long pfn)
  24 {
  25         unsigned long nosave_begin_pfn = PFN_DOWN((unsigned long)&__nosave_begin);
  26         unsigned long nosave_end_pfn = PFN_DOWN((unsigned long)&__nosave_end);
  27
  28         return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
  29 }
  30
  31 void save_processor_state(void)
  32 {
  33         save_and_clear_fpu();
  34 }
  35
  36 void restore_processor_state(void)
  37 {
  38         struct mm_struct *mm = current->active_mm;
  39
  40         tsb_context_switch_ctx(mm, CTX_HWBITS(mm->context));
  41 }