arch/xtensa/kernel/hibernate.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2
   3 #include <linux/mm.h>
   4 #include <linux/suspend.h>
   5 #include <asm/coprocessor.h>
   6
   7 int pfn_is_nosave(unsigned long pfn)
   8 {
   9         unsigned long nosave_begin_pfn = PFN_DOWN(__pa(&__nosave_begin));
  10         unsigned long nosave_end_pfn = PFN_UP(__pa(&__nosave_end));
  11
  12         return  (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
  13 }
  14
  15 void notrace save_processor_state(void)
  16 {
  17         WARN_ON(num_online_cpus() != 1);
  18 #if XTENSA_HAVE_COPROCESSORS
  19         local_coprocessors_flush_release_all();
  20 #endif
  21 }
  22
  23 void notrace restore_processor_state(void)
  24 {
  25 }