Commit 7db54bfe authored by Huacai Chen's avatar Huacai Chen
Browse files

LoongArch: Add hibernation (ACPI S4) support 



Add hibernation (Suspend to Disk, aka ACPI S4) support for LoongArch.

Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent 366bb35a

arch/loongarch/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -521,6 +521,9 @@ menu "Power management options" 
config ARCH_SUSPEND_POSSIBLE

	def_bool y



config ARCH_HIBERNATION_POSSIBLE

	def_bool y



source "kernel/power/Kconfig"

source "drivers/acpi/Kconfig"

arch/loongarch/kernel/asm-offsets.c

+12 −0
Original line number Diff line number Diff line
@@ -257,3 +257,15 @@ void output_smpboot_defines(void) 
	BLANK();

}

#endif



#ifdef CONFIG_HIBERNATION

void output_pbe_defines(void)

{

	COMMENT(" Linux struct pbe offsets. ");

	OFFSET(PBE_ADDRESS, pbe, address);

	OFFSET(PBE_ORIG_ADDRESS, pbe, orig_address);

	OFFSET(PBE_NEXT, pbe, next);

	DEFINE(PBE_SIZE, sizeof(struct pbe));

	BLANK();

}

#endif

arch/loongarch/kernel/reset.c

+5 −0
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ 
#include <acpi/reboot.h>

#include <asm/idle.h>

#include <asm/loongarch.h>

#include <asm/loongson.h>



void (*pm_power_off)(void);

EXPORT_SYMBOL(pm_power_off);
@@ -41,6 +42,10 @@ void machine_power_off(void) 
#ifdef CONFIG_SMP

	preempt_disable();

	smp_send_stop();

#endif

#ifdef CONFIG_PM

	if (!acpi_disabled)

		enable_pci_wakeup();

#endif

	do_kernel_power_off();

#ifdef CONFIG_EFI

arch/loongarch/kernel/setup.c

+5 −0
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ 
#include <linux/libfdt.h>

#include <linux/of_fdt.h>

#include <linux/of_address.h>

#include <linux/suspend.h>

#include <linux/swiotlb.h>



#include <asm/addrspace.h>
@@ -370,6 +371,10 @@ static void __init arch_mem_init(char **cmdline_p) 


	dma_contiguous_reserve(PFN_PHYS(max_low_pfn));



	/* Reserve for hibernation. */

	register_nosave_region(PFN_DOWN(__pa_symbol(&__nosave_begin)),

				   PFN_UP(__pa_symbol(&__nosave_end)));



	memblock_dump_all();



	early_memtest(PFN_PHYS(ARCH_PFN_OFFSET), PFN_PHYS(max_low_pfn));

arch/loongarch/power/Makefile

+1 −0
Original line number Diff line number Diff line 
obj-y	+= platform.o



obj-$(CONFIG_SUSPEND)		+= suspend.o suspend_asm.o

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