Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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}