cpu.c

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/*
 * Suspend support specific for mips.
 *
 * Licensed under the GPLv2
 *
 * Copyright (C) 2009 Lemote Inc.
 * Author: Hu Hongbing <[email protected]>
 *         Wu Zhangjin <[email protected]>
 */
#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);
}