linux/arch/xtensa/kernel/hibernate.c
Max Filippov 733f5c28e5 xtensa: add hibernation support
Define ARCH_HIBERNATION_POSSIBLE in Kconfig and implement hibernation
callbacks.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2022-05-01 19:51:24 -07:00

26 lines
556 B
C

// SPDX-License-Identifier: GPL-2.0-only
#include <linux/mm.h>
#include <linux/suspend.h>
#include <asm/coprocessor.h>
int pfn_is_nosave(unsigned long pfn)
{
unsigned long nosave_begin_pfn = PFN_DOWN(__pa(&__nosave_begin));
unsigned long nosave_end_pfn = PFN_UP(__pa(&__nosave_end));
return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
}
void notrace save_processor_state(void)
{
WARN_ON(num_online_cpus() != 1);
#if XTENSA_HAVE_COPROCESSORS
local_coprocessors_flush_release_all();
#endif
}
void notrace restore_processor_state(void)
{
}