root/arch/powerpc/kernel/swsusp.c
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Common powerpc suspend code for 32 and 64 bits
 *
 * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
 */

#include <linux/sched.h>
#include <linux/suspend.h>
#include <asm/current.h>
#include <asm/mmu_context.h>
#include <asm/switch_to.h>

void save_processor_state(void)
{
        /*
         * flush out all the special registers so we don't need
         * to save them in the snapshot
         */
        flush_all_to_thread(current);

#ifdef CONFIG_PPC64
        hard_irq_disable();
#endif

}

void restore_processor_state(void)
{
#ifdef CONFIG_PPC32
        switch_mmu_context(current->active_mm, current->active_mm, NULL);
#endif
}