LXR linux/arch/mips/power/cpu.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Suspend support specific for mips.
   4 *
   5 * Copyright (C) 2009 Lemote Inc.
   6 * Author: Hu Hongbing <huhb@lemote.com>
   7 *         Wu Zhangjin <wuzhangjin@gmail.com>
   8 */
   9#include <asm/sections.h>
  10#include <asm/fpu.h>
  11#include <asm/dsp.h>
  12
  13static u32 saved_status;
  14struct pt_regs saved_regs;
  15
  16void save_processor_state(void)
  17{
  18        saved_status = read_c0_status();
  19
  20        if (is_fpu_owner())
  21                save_fp(current);
  22
  23        save_dsp(current);
  24}
  25
  26void restore_processor_state(void)
  27{
  28        write_c0_status(saved_status);
  29
  30        if (is_fpu_owner())
  31                restore_fp(current);
  32
  33        restore_dsp(current);
  34}
  35
  36int pfn_is_nosave(unsigned long pfn)
  37{
  38        unsigned long nosave_begin_pfn = PFN_DOWN(__pa(&__nosave_begin));
  39        unsigned long nosave_end_pfn = PFN_UP(__pa(&__nosave_end));
  40
  41        return  (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
  42}
  43