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/mm.h> |
9 | |
10 | #include <asm/hibernate.h> |
11 | #include <asm/visasm.h> |
12 | #include <asm/page.h> |
13 | #include <asm/sections.h> |
14 | #include <asm/tlb.h> |
15 | |
16 | struct saved_context saved_context; |
17 | |
18 | /* |
19 | * pfn_is_nosave - check if given pfn is in the 'nosave' section |
20 | */ |
21 | |
22 | int pfn_is_nosave(unsigned long pfn) |
23 | { |
24 | unsigned long nosave_begin_pfn = PFN_DOWN((unsigned long)&__nosave_begin); |
25 | unsigned long nosave_end_pfn = PFN_DOWN((unsigned long)&__nosave_end); |
26 | |
27 | return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn); |
28 | } |
29 | |
30 | void save_processor_state(void) |
31 | { |
32 | save_and_clear_fpu(); |
33 | } |
34 | |
35 | void restore_processor_state(void) |
36 | { |
37 | struct mm_struct *mm = current->active_mm; |
38 | |
39 | tsb_context_switch_ctx(mm, CTX_HWBITS(mm->context)); |
40 | } |
41 |