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}

 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 <linux/suspend.h>
10#include <asm/sections.h>
11#include <asm/fpu.h>
12#include <asm/dsp.h>
13
14static u32 saved_status;
15struct pt_regs saved_regs;
16
17void save_processor_state(void)
18{
19	saved_status = read_c0_status();
20
21	if (is_fpu_owner())
22		save_fp(current);
23
24	save_dsp(current);
25}
26
27void restore_processor_state(void)
28{
29	write_c0_status(saved_status);
30
31	if (is_fpu_owner())
32		restore_fp(current);
33
34	restore_dsp(current);
35}
36
37int pfn_is_nosave(unsigned long pfn)
38{
39	unsigned long nosave_begin_pfn = PFN_DOWN(__pa(&__nosave_begin));
40	unsigned long nosave_end_pfn = PFN_UP(__pa(&__nosave_end));
41
42	return	(pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
43}