[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / sparc / power / hibernate.c

/*
 * hibernate.c:  Hibernaton support specific for sparc64.
 *
 * Copyright (C) 2013 Kirill V Tkhai (tkhai@yandex.ru)
 */

#include <linux/mm.h>

#include <asm/hibernate.h>
#include <asm/visasm.h>
#include <asm/page.h>
#include <asm/tlb.h>

/* References to section boundaries */
extern const void __nosave_begin, __nosave_end;

struct saved_context saved_context;

/*
 *	pfn_is_nosave - check if given pfn is in the 'nosave' section
 */

int pfn_is_nosave(unsigned long pfn)
{
	unsigned long nosave_begin_pfn = PFN_DOWN((unsigned long)&__nosave_begin);
	unsigned long nosave_end_pfn = PFN_DOWN((unsigned long)&__nosave_end);

	return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
}

void save_processor_state(void)
{
	save_and_clear_fpu();
}

void restore_processor_state(void)
{
	struct mm_struct *mm = current->active_mm;

	load_secondary_context(mm);
	tsb_context_switch(mm);
}
Commit	Line	Data
bdde6b3c TK	1	/*
	2	* hibernate.c: Hibernaton support specific for sparc64.
	3	*
	4	* Copyright (C) 2013 Kirill V Tkhai (tkhai@yandex.ru)
	5	*/
	6
	7	#include <linux/mm.h>
	8
	9	#include <asm/hibernate.h>
	10	#include <asm/visasm.h>
	11	#include <asm/page.h>
	12	#include <asm/tlb.h>
	13
	14	/* References to section boundaries */
	15	extern const void __nosave_begin, __nosave_end;
	16
	17	struct saved_context saved_context;
	18
	19	/*
	20	* pfn_is_nosave - check if given pfn is in the 'nosave' section
	21	*/
	22
	23	int pfn_is_nosave(unsigned long pfn)
	24	{
	25	unsigned long nosave_begin_pfn = PFN_DOWN((unsigned long)&__nosave_begin);
	26	unsigned long nosave_end_pfn = PFN_DOWN((unsigned long)&__nosave_end);
	27
	28	return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
	29	}
	30
	31	void save_processor_state(void)
	32	{
	33	save_and_clear_fpu();
	34	}
	35
	36	void restore_processor_state(void)
	37	{
	38	struct mm_struct *mm = current->active_mm;
	39
	40	load_secondary_context(mm);
	41	tsb_context_switch(mm);
	42	}