Eric Lee / smarc-fsl-linux-kernel

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arch/mips/power/cpu.c 863 Bytes
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363c55cae   Wu Zhangjin   MIPS: Add hiberna... 
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  /*
   * Suspend support specific for mips.
   *
   * Licensed under the GPLv2
   *
f7a904dff   Wu Zhangjin   MIPS: Loongson: C... 
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   * Copyright (C) 2009 Lemote Inc.
363c55cae   Wu Zhangjin   MIPS: Add hiberna... 
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   * Author: Hu Hongbing <huhb@lemote.com>
f7a904dff   Wu Zhangjin   MIPS: Loongson: C... 
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   *         Wu Zhangjin <wuzhangjin@gmail.com>
363c55cae   Wu Zhangjin   MIPS: Add hiberna... 
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   */
  #include <asm/suspend.h>
  #include <asm/fpu.h>
  #include <asm/dsp.h>
  
  static u32 saved_status;
  struct pt_regs saved_regs;
  
  void save_processor_state(void)
  {
  	saved_status = read_c0_status();
  
  	if (is_fpu_owner())
  		save_fp(current);
  	if (cpu_has_dsp)
  		save_dsp(current);
  }
  
  void restore_processor_state(void)
  {
  	write_c0_status(saved_status);
  
  	if (is_fpu_owner())
  		restore_fp(current);
  	if (cpu_has_dsp)
  		restore_dsp(current);
  }
  
  int pfn_is_nosave(unsigned long pfn)
  {
  	unsigned long nosave_begin_pfn = PFN_DOWN(__pa(&__nosave_begin));
  	unsigned long nosave_end_pfn = PFN_UP(__pa(&__nosave_end));
  
  	return	(pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
  }