| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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 | } |