1 /* 2 * Suspend support specific for power. 3 * 4 * Distribute under GPLv2 5 * 6 * Copyright (c) 2002 Pavel Machek <pavel@ucw.cz> 7 * Copyright (c) 2001 Patrick Mochel <mochel@osdl.org> 8 */ 9 10 #include <linux/mm.h> 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 } 26