| Vivek Goyal | 49c3df6 | 2007-05-02 19:27:07 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Suspend support specific for power. |
| 3 | * |
| 4 | * Distribute under GPLv2 |
| 5 | * |
| Pavel Machek | a253129 | 2010-07-18 14:27:13 +0200 | [diff] [blame] | 6 | * Copyright (c) 2002 Pavel Machek <pavel@ucw.cz> |
| Vivek Goyal | 49c3df6 | 2007-05-02 19:27:07 +0200 | [diff] [blame] | 7 | * Copyright (c) 2001 Patrick Mochel <mochel@osdl.org> |
| 8 | */ |
| 9 | |
| Andrea Righi | 27ac792 | 2008-07-23 21:28:13 -0700 | [diff] [blame] | 10 | #include <linux/mm.h> |
| Vivek Goyal | 49c3df6 | 2007-05-02 19:27:07 +0200 | [diff] [blame] | 11 | #include <asm/page.h> |
| 12 | |
| 13 | /* References to section boundaries */ |
| 14 | extern const void __nosave_begin, __nosave_end; |
| 15 | |
| 16 | /* |
| 17 | * pfn_is_nosave - check if given pfn is in the 'nosave' section |
| 18 | */ |
| 19 | |
| 20 | int pfn_is_nosave(unsigned long pfn) |
| 21 | { |
| 22 | unsigned long nosave_begin_pfn = __pa(&__nosave_begin) >> PAGE_SHIFT; |
| 23 | unsigned long nosave_end_pfn = PAGE_ALIGN(__pa(&__nosave_end)) >> PAGE_SHIFT; |
| 24 | return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn); |
| 25 | } |