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 
13 static u32 saved_status;
14 struct pt_regs saved_regs;
15 
save_processor_state(void)16 void 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 
restore_processor_state(void)26 void 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 
pfn_is_nosave(unsigned long pfn)36 int 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