From d6a77ead21b69c395ca6d09a066ededfac601bcc Mon Sep 17 00:00:00 2001 From: Konrad Rzeszutek Wilk Date: Tue, 14 May 2013 17:09:16 +0000 Subject: [PATCH] x86 / ACPI / sleep: Provide registration for acpi_suspend_lowlevel. Which by default will be x86_acpi_suspend_lowlevel. This registration allows us to register another callback if there is a need to use another platform specific callback. Signed-off-by: Liang Tang Signed-off-by: Konrad Rzeszutek Wilk Tested-by: Ben Guthro Acked-by: "H. Peter Anvin" Signed-off-by: Rafael J. Wysocki --- arch/x86/include/asm/acpi.h | 2 +- arch/x86/kernel/acpi/boot.c | 7 +++++++ arch/x86/kernel/acpi/sleep.c | 4 ++-- arch/x86/kernel/acpi/sleep.h | 2 ++ drivers/acpi/sleep.c | 2 ++ 5 files changed, 14 insertions(+), 3 deletions(-) diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h index b31bf97775fc..2dfac58f3b11 100644 --- a/arch/x86/include/asm/acpi.h +++ b/arch/x86/include/asm/acpi.h @@ -111,7 +111,7 @@ static inline void acpi_disable_pci(void) } /* Low-level suspend routine. */ -extern int acpi_suspend_lowlevel(void); +extern int (*acpi_suspend_lowlevel)(void); /* Physical address to resume after wakeup */ #define acpi_wakeup_address ((unsigned long)(real_mode_header->wakeup_start)) diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index 230c8ea878e5..d81a972dd506 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -44,6 +44,7 @@ #include #include +#include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ static int __initdata acpi_force = 0; u32 acpi_rsdt_forced; int acpi_disabled; @@ -559,6 +560,12 @@ static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, int (*__acpi_register_gsi)(struct device *dev, u32 gsi, int trigger, int polarity) = acpi_register_gsi_pic; +#ifdef CONFIG_ACPI_SLEEP +int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; +#else +int (*acpi_suspend_lowlevel)(void); +#endif + /* * success: return IRQ number (>=0) * failure: return < 0 diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c index b44577bc9744..2a34aaf3c8f1 100644 --- a/arch/x86/kernel/acpi/sleep.c +++ b/arch/x86/kernel/acpi/sleep.c @@ -26,12 +26,12 @@ static char temp_stack[4096]; #endif /** - * acpi_suspend_lowlevel - save kernel state + * x86_acpi_suspend_lowlevel - save kernel state * * Create an identity mapped page table and copy the wakeup routine to * low memory. */ -int acpi_suspend_lowlevel(void) +int x86_acpi_suspend_lowlevel(void) { struct wakeup_header *header = (struct wakeup_header *) __va(real_mode_header->wakeup_header); diff --git a/arch/x86/kernel/acpi/sleep.h b/arch/x86/kernel/acpi/sleep.h index 67f59f8c6956..c9c2c982d5e4 100644 --- a/arch/x86/kernel/acpi/sleep.h +++ b/arch/x86/kernel/acpi/sleep.h @@ -15,3 +15,5 @@ extern unsigned long acpi_copy_wakeup_routine(unsigned long); extern void wakeup_long64(void); extern void do_suspend_lowlevel(void); + +extern int x86_acpi_suspend_lowlevel(void); diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index 9c1a435d10e6..187ab61889e6 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -494,6 +494,8 @@ static int acpi_suspend_enter(suspend_state_t pm_state) break; case ACPI_STATE_S3: + if (!acpi_suspend_lowlevel) + return -ENOSYS; error = acpi_suspend_lowlevel(); if (error) return error; -- 2.39.5