tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 */
15extern const void __nosave_begin, __nosave_end;
16
17struct saved_context saved_context;
18
19/*
20 * pfn_is_nosave - check if given pfn is in the 'nosave' section
21 */
22
23int 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
31void save_processor_state(void)
32{
33 save_and_clear_fpu();
34}
35
36void 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}