arch/sh/kernel/swsusp.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * swsusp.c - SuperH hibernation support
   4  *
   5  * Copyright (C) 2009 Magnus Damm
   6  */
   7
   8 #include <linux/mm.h>
   9 #include <linux/sched.h>
  10 #include <linux/suspend.h>
  11 #include <asm/suspend.h>
  12 #include <asm/sections.h>
  13 #include <asm/tlbflush.h>
  14 #include <asm/page.h>
  15 #include <asm/fpu.h>
  16
  17 struct swsusp_arch_regs swsusp_arch_regs_cpu0;
  18
  19 int pfn_is_nosave(unsigned long pfn)
  20 {
  21         unsigned long begin_pfn = __pa(&__nosave_begin) >> PAGE_SHIFT;
  22         unsigned long end_pfn = PAGE_ALIGN(__pa(&__nosave_end)) >> PAGE_SHIFT;
  23
  24         return (pfn >= begin_pfn) && (pfn < end_pfn);
  25 }
  26
  27 void save_processor_state(void)
  28 {
  29         init_fpu(current);
  30 }
  31
  32 void restore_processor_state(void)
  33 {
  34         local_flush_tlb_all();
  35 }