Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[cascardo/linux.git] / arch / sparc / power / hibernate.c
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 }