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bdde6b3c TK |
1 | /* |
2 | * hibernate.c: Hibernaton support specific for sparc64. | |
3 | * | |
4 | * Copyright (C) 2013 Kirill V Tkhai (tkhai@yandex.ru) | |
5 | */ | |
6 | ||
7 | #include <linux/mm.h> | |
8 | ||
9 | #include <asm/hibernate.h> | |
10 | #include <asm/visasm.h> | |
11 | #include <asm/page.h> | |
12 | #include <asm/tlb.h> | |
13 | ||
14 | /* References to section boundaries */ | |
15 | extern const void __nosave_begin, __nosave_end; | |
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 | load_secondary_context(mm); | |
41 | tsb_context_switch(mm); | |
42 | } |