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/suspend.h>
 9#include <linux/mm.h>
10
11#include <asm/hibernate.h>
12#include <asm/visasm.h>
13#include <asm/page.h>
14#include <asm/sections.h>
15#include <asm/tlb.h>
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	tsb_context_switch_ctx(mm, CTX_HWBITS(mm->context));
41}