1 | // SPDX-License-Identifier: GPL-2.0-only |
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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 | } |
24 |