arch/powerpc/kernel/suspend.c

   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 }