arch/sh/kernel/swsusp.c

   1 /*
   2  * swsusp.c - SuperH hibernation support
   3  *
   4  * Copyright (C) 2009 Magnus Damm
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License.  See the file "COPYING" in the main directory of this archive
   8  * for more details.
   9  */
  10
  11 #include <linux/mm.h>
  12 #include <linux/sched.h>
  13 #include <linux/suspend.h>
  14 #include <asm/suspend.h>
  15 #include <asm/sections.h>
  16 #include <asm/tlbflush.h>
  17 #include <asm/page.h>
  18 #include <asm/fpu.h>
  19
  20 struct swsusp_arch_regs swsusp_arch_regs_cpu0;
  21
  22 int pfn_is_nosave(unsigned long pfn)
  23 {
  24         unsigned long begin_pfn = __pa(&__nosave_begin) >> PAGE_SHIFT;
  25         unsigned long end_pfn = PAGE_ALIGN(__pa(&__nosave_end)) >> PAGE_SHIFT;
  26
  27         return (pfn >= begin_pfn) && (pfn < end_pfn);
  28 }
  29
  30 void save_processor_state(void)
  31 {
  32         init_fpu(current);
  33 }
  34
  35 void restore_processor_state(void)
  36 {
  37         local_flush_tlb_all();
  38 }