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
14 static u32 saved_status;
15 struct pt_regs saved_regs;
16
17 void 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
27 void 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
37 int 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 }
44
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.