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
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 }