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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
bdde6b3c TK |
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> | |
7f8998c7 | 13 | #include <asm/sections.h> |
bdde6b3c TK |
14 | #include <asm/tlb.h> |
15 | ||
bdde6b3c TK |
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 | ||
fc290a11 | 39 | tsb_context_switch_ctx(mm, CTX_HWBITS(mm->context)); |
bdde6b3c | 40 | } |