Commit 366bb35a authored by Huacai Chen's avatar Huacai Chen
Browse files

LoongArch: Add suspend (ACPI S3) support 



Add suspend (Suspend To RAM, aka ACPI S3) support for LoongArch.

Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent 27cab431

arch/loongarch/Kconfig

+5 −0
Original line number Diff line number Diff line
@@ -56,6 +56,7 @@ config LOONGARCH 
	select ARCH_WANTS_NO_INSTR

	select BUILDTIME_TABLE_SORT

	select COMMON_CLK

	select CPU_PM

	select EFI

	select GENERIC_CLOCKEVENTS

	select GENERIC_CMOS_UPDATE
@@ -517,6 +518,10 @@ config ARCH_MMAP_RND_BITS_MAX 


menu "Power management options"



config ARCH_SUSPEND_POSSIBLE

	def_bool y



source "kernel/power/Kconfig"

source "drivers/acpi/Kconfig"



endmenu

arch/loongarch/Makefile

+3 −0
Original line number Diff line number Diff line
@@ -104,6 +104,9 @@ endif 
libs-y += arch/loongarch/lib/

libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a



# suspend and hibernation support

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



ifeq ($(KBUILD_EXTMOD),)

prepare: vdso_prepare

vdso_prepare: prepare0

arch/loongarch/include/asm/acpi.h

+10 −0
Original line number Diff line number Diff line
@@ -35,4 +35,14 @@ extern struct list_head acpi_wakeup_device_list; 


#define ACPI_TABLE_UPGRADE_MAX_PHYS ARCH_LOW_ADDRESS_LIMIT



extern int loongarch_acpi_suspend(void);

extern int (*acpi_suspend_lowlevel)(void);

extern void loongarch_suspend_enter(void);



static inline unsigned long acpi_get_wakeup_address(void)

{

	extern void loongarch_wakeup_start(void);

	return (unsigned long)loongarch_wakeup_start;

}



#endif /* _ASM_LOONGARCH_ACPI_H */

arch/loongarch/include/asm/bootinfo.h

+1 −0
Original line number Diff line number Diff line
@@ -32,6 +32,7 @@ struct loongson_system_configuration { 
	int cores_per_node;

	int cores_per_package;

	unsigned long cores_io_master;

	unsigned long suspend_addr;

	const char *cpuname;

};

arch/loongarch/include/asm/loongson.h

+3 −0
Original line number Diff line number Diff line
@@ -136,4 +136,7 @@ typedef enum { 
#define ls7a_writel(val, addr)	*(volatile unsigned int   *)TO_UNCACHE(addr) = (val)

#define ls7a_writeq(val, addr)	*(volatile unsigned long  *)TO_UNCACHE(addr) = (val)



void enable_gpe_wakeup(void);

void enable_pci_wakeup(void);



#endif /* __ASM_LOONGSON_H */