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
16struct saved_context saved_context;
17
18/*
19 *	pfn_is_nosave - check if given pfn is in the 'nosave' section
20 */
21
22int 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
30void save_processor_state(void)
31{
32	save_and_clear_fpu();
33}
34
35void 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