xref: /openbmc/linux/arch/powerpc/kernel/swsusp.c (revision 4f205687)
1 /*
2  * Common powerpc suspend code for 32 and 64 bits
3  *
4  * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public License
8  * as published by the Free Software Foundation; either version
9  * 2 of the License, or (at your option) any later version.
10  */
11 
12 #include <linux/sched.h>
13 #include <asm/current.h>
14 #include <asm/mmu_context.h>
15 #include <asm/switch_to.h>
16 
17 void save_processor_state(void)
18 {
19 	/*
20 	 * flush out all the special registers so we don't need
21 	 * to save them in the snapshot
22 	 */
23 	flush_all_to_thread(current);
24 
25 #ifdef CONFIG_PPC64
26 	hard_irq_disable();
27 #endif
28 
29 }
30 
31 void restore_processor_state(void)
32 {
33 #ifdef CONFIG_PPC32
34 	switch_mmu_context(current->active_mm, current->active_mm, NULL);
35 #endif
36 }
37