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Commit bdde6b3c authored by Tkhai Kirill's avatar Tkhai Kirill Committed by David S. Miller
Browse files

sparc64: Hibernation support 



This patch adds CONFIG_HIBERNATION support for sparc64
architecture. The suspend function is the same as on another
platforms. The restore function uses Bypass feature of MMU
which allows to make the process more comfortable and plesant.

Signed-off-by: default avatarKirill Tkhai <tkhai@yandex.ru>
CC: David Miller <davem@davemloft.net>
CC: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1ab0a676

arch/sparc/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -100,6 +100,9 @@ config HAVE_LATENCYTOP_SUPPORT 
	bool

	default y if SPARC64



config ARCH_HIBERNATION_POSSIBLE

	def_bool y if SPARC64



config AUDIT_ARCH

	bool

	default y
@@ -327,6 +330,10 @@ config ARCH_SPARSEMEM_DEFAULT 


source "mm/Kconfig"



if SPARC64

source "kernel/power/Kconfig"

endif



config SCHED_SMT

	bool "SMT (Hyperthreading) scheduler support"

	depends on SPARC64 && SMP

arch/sparc/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -57,6 +57,7 @@ core-y += arch/sparc/ 
libs-y                 += arch/sparc/prom/

libs-y                 += arch/sparc/lib/



drivers-$(CONFIG_PM) += arch/sparc/power/

drivers-$(CONFIG_OPROFILE)	+= arch/sparc/oprofile/



boot := arch/sparc/boot

arch/sparc/include/asm/hibernate.h

0 → 100644
+23 −0
Original line number Diff line number Diff line 
/*

 * hibernate.h:  Hibernaton support specific for sparc64.

 *

 * Copyright (C) 2013 Kirill V Tkhai (tkhai@yandex.ru)

 */



#ifndef ___SPARC_HIBERNATE_H

#define ___SPARC_HIBERNATE_H



struct saved_context {

	unsigned long fp;

	unsigned long cwp;

	unsigned long wstate;



	unsigned long tick;

	unsigned long pstate;



	unsigned long g4;

	unsigned long g5;

	unsigned long g6;

};



#endif

arch/sparc/kernel/asm-offsets.c

+15 −0
Original line number Diff line number Diff line
@@ -14,6 +14,8 @@ 
// #include <linux/mm.h>

#include <linux/kbuild.h>



#include <asm/hibernate.h>



#ifdef CONFIG_SPARC32

int sparc32_foo(void)

{
@@ -24,6 +26,19 @@ int sparc32_foo(void) 
#else

int sparc64_foo(void)

{

#ifdef CONFIG_HIBERNATION

	BLANK();

	OFFSET(SC_REG_FP, saved_context, fp);

	OFFSET(SC_REG_CWP, saved_context, cwp);

	OFFSET(SC_REG_WSTATE, saved_context, wstate);



	OFFSET(SC_REG_TICK, saved_context, tick);

	OFFSET(SC_REG_PSTATE, saved_context, pstate);



	OFFSET(SC_REG_G4, saved_context, g4);

	OFFSET(SC_REG_G5, saved_context, g5);

	OFFSET(SC_REG_G6, saved_context, g6);

#endif

	return 0;

}

#endif

arch/sparc/power/Makefile

0 → 100644
+3 −0
Original line number Diff line number Diff line 
# Makefile for Sparc-specific hibernate files.



obj-$(CONFIG_HIBERNATION)	+= hibernate.o hibernate_asm.o