From b2ed886e43ec90bae86d6cae6582b457e76d1fd8 Mon Sep 17 00:00:00 2001 From: Konrad Rzeszutek Wilk Date: Thu, 8 Dec 2011 17:16:43 +0800 Subject: 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. CC: Thomas Gleixner CC: "H. Peter Anvin" CC: x86@kernel.org CC: Len Brown CC: Joseph Cihula CC: Shane Wang CC: linux-pm@lists.linux-foundation.org CC: linux-acpi@vger.kernel.org CC: Len Brown Signed-off-by: Liang Tang [v1: Fix when CONFIG_ACPI_SLEEP is not set] Signed-off-by: Konrad Rzeszutek Wilk --- 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 610001d..68cf060 100644 --- a/arch/x86/include/asm/acpi.h +++ b/arch/x86/include/asm/acpi.h @@ -115,7 +115,7 @@ static inline void acpi_disable_pci(void) } /* Low-level suspend routine. */ -extern int acpi_suspend_lowlevel(void); +extern int (*acpi_suspend_lowlevel)(void); extern const unsigned char acpi_wakeup_code[]; #define acpi_wakeup_address (__pa(TRAMPOLINE_SYM(acpi_wakeup_code))) diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index ce664f3..c3a5b95 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; @@ -558,6 +559,12 @@ 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 103b6ab..4d2d0b1 100644 --- a/arch/x86/kernel/acpi/sleep.c +++ b/arch/x86/kernel/acpi/sleep.c @@ -25,12 +25,12 @@ 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; /* address in low memory of the wakeup routine. */ diff --git a/arch/x86/kernel/acpi/sleep.h b/arch/x86/kernel/acpi/sleep.h index 416d4be..4d3feb5 100644 --- a/arch/x86/kernel/acpi/sleep.h +++ b/arch/x86/kernel/acpi/sleep.h @@ -13,3 +13,5 @@ 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 0a7ed69..44dbdde 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -254,6 +254,8 @@ 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; -- 1.7.6.4