1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Suspend support specific for power.
4  *
5  * Copyright (c) 2002 Pavel Machek <pavel@ucw.cz>
6  * Copyright (c) 2001 Patrick Mochel <mochel@osdl.org>
7  */
8 
9 #include <linux/mm.h>
10 #include <linux/suspend.h>
11 #include <asm/page.h>
12 #include <asm/sections.h>
13 
14 /*
15  *	pfn_is_nosave - check if given pfn is in the 'nosave' section
16  */
17 
pfn_is_nosave(unsigned long pfn)18 int pfn_is_nosave(unsigned long pfn)
19 {
20 	unsigned long nosave_begin_pfn = __pa(&__nosave_begin) >> PAGE_SHIFT;
21 	unsigned long nosave_end_pfn = PAGE_ALIGN(__pa(&__nosave_end)) >> PAGE_SHIFT;
22 	return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
23 }
24