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 (tkhai@yandex.ru)
   6  */
   7
   8 #include <linux/mm.h>
   9
  10 #include <asm/hibernate.h>
  11 #include <asm/visasm.h>
  12 #include <asm/page.h>
  13 #include <asm/sections.h>
  14 #include <asm/tlb.h>
  15
  16 struct saved_context saved_context;
  17
  18 /*
  19  *      pfn_is_nosave - check if given pfn is in the 'nosave' section
  20  */
  21
  22 int pfn_is_nosave(unsigned long pfn)
  23 {
  24         unsigned long nosave_begin_pfn = PFN_DOWN((unsigned long)&__nosave_begin);
  25         unsigned long nosave_end_pfn = PFN_DOWN((unsigned long)&__nosave_end);
  26
  27         return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
  28 }
  29
  30 void save_processor_state(void)
  31 {
  32         save_and_clear_fpu();
  33 }
  34
  35 void restore_processor_state(void)
  36 {
  37         struct mm_struct *mm = current->active_mm;
  38
  39         tsb_context_switch_ctx(mm, CTX_HWBITS(mm->context));
  40 }