1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * hibernate.c: Hibernaton support specific for sparc64.
4 *
5 * Copyright (C) 2013 Kirill V Tkhai (tkhai@yandex.ru)
6 */
7
8 #include <linux/suspend.h>
9 #include <linux/mm.h>
10
11 #include <asm/hibernate.h>
12 #include <asm/visasm.h>
13 #include <asm/page.h>
14 #include <asm/sections.h>
15 #include <asm/tlb.h>
16
17 struct saved_context saved_context;
18
19 /*
20 * pfn_is_nosave - check if given pfn is in the 'nosave' section
21 */
22
23 int pfn_is_nosave(unsigned long pfn)
24 {
25 unsigned long nosave_begin_pfn = PFN_DOWN((unsigned long)&__nosave_begin);
26 unsigned long nosave_end_pfn = PFN_DOWN((unsigned long)&__nosave_end);
27
28 return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
29 }
30
31 void save_processor_state(void)
32 {
33 save_and_clear_fpu();
34 }
35
36 void restore_processor_state(void)
37 {
38 struct mm_struct *mm = current->active_mm;
39
40 tsb_context_switch_ctx(mm, CTX_HWBITS(mm->context));
41 }
42
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