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 
pfn_is_nosave(unsigned long pfn)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 
save_processor_state(void)30 void save_processor_state(void)
31 {
32 	save_and_clear_fpu();
33 }
34 
restore_processor_state(void)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