linux/arch/sh/kernel/swsusp.c
Magnus Damm 2ef7f0dab6 sh: hibernation support
Add Suspend-to-disk / swsusp / CONFIG_HIBERNATION support
to the SuperH architecture.

To suspend, use "swapon /dev/sda2; echo disk > /sys/power/state"
To resume, pass "resume=/dev/sda2" on the kernel command line.

The patch "pm: rework includes, remove arch ifdefs V2" is
needed to allow the generic swsusp code to build properly.

Hibernation is not enabled with this patch though, a patch
setting ARCH_HIBERNATION_POSSIBLE will be submitted later.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-03-10 12:55:40 +09:00

38 lines
851 B
C

/*
* swsusp.c - SuperH hibernation support
*
* Copyright (C) 2009 Magnus Damm
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/suspend.h>
#include <asm/suspend.h>
#include <asm/sections.h>
#include <asm/tlbflush.h>
#include <asm/page.h>
#include <asm/fpu.h>
struct swsusp_arch_regs swsusp_arch_regs_cpu0;
int pfn_is_nosave(unsigned long pfn)
{
unsigned long begin_pfn = __pa(&__nosave_begin) >> PAGE_SHIFT;
unsigned long end_pfn = PAGE_ALIGN(__pa(&__nosave_end)) >> PAGE_SHIFT;
return (pfn >= begin_pfn) && (pfn < end_pfn);
}
void save_processor_state(void)
{
init_fpu(current);
}
void restore_processor_state(void)
{
local_flush_tlb_all();
}