Quelle  cpu.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Suspend support specific for mips.
 *
 * Copyright (C) 2009 Lemote Inc.
 * Author: Hu Hongbing <huhb@lemote.com>
 *    Wu Zhangjin <wuzhangjin@gmail.com>
 */
#include <linux/suspend.h>
#include <asm/sections.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);

 save_dsp(current);
}

void restore_processor_state(void)
{
 write_c0_status(saved_status);

 if (is_fpu_owner())
  restore_fp(current);

 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);
}