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Diffstat (limited to 'libdde-linux26/contrib/include/linux/suspend.h')
| -rw-r--r-- | libdde-linux26/contrib/include/linux/suspend.h | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/libdde-linux26/contrib/include/linux/suspend.h b/libdde-linux26/contrib/include/linux/suspend.h new file mode 100644 index 00000000..c7d9bb18 --- /dev/null +++ b/libdde-linux26/contrib/include/linux/suspend.h @@ -0,0 +1,298 @@ +#ifndef _LINUX_SUSPEND_H +#define _LINUX_SUSPEND_H + +#if defined(CONFIG_X86) || defined(CONFIG_FRV) || defined(CONFIG_PPC32) || defined(CONFIG_PPC64) +#include <asm/suspend.h> +#endif +#include <linux/swap.h> +#include <linux/notifier.h> +#include <linux/init.h> +#include <linux/pm.h> +#include <linux/mm.h> +#include <asm/errno.h> + +#if defined(CONFIG_PM_SLEEP) && defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE) +extern void pm_set_vt_switch(int); +extern int pm_prepare_console(void); +extern void pm_restore_console(void); +#else +static inline void pm_set_vt_switch(int do_switch) +{ +} + +static inline int pm_prepare_console(void) +{ + return 0; +} + +static inline void pm_restore_console(void) +{ +} +#endif + +typedef int __bitwise suspend_state_t; + +#define PM_SUSPEND_ON ((__force suspend_state_t) 0) +#define PM_SUSPEND_STANDBY ((__force suspend_state_t) 1) +#define PM_SUSPEND_MEM ((__force suspend_state_t) 3) +#define PM_SUSPEND_MAX ((__force suspend_state_t) 4) + +/** + * struct platform_suspend_ops - Callbacks for managing platform dependent + * system sleep states. + * + * @valid: Callback to determine if given system sleep state is supported by + * the platform. + * Valid (ie. supported) states are advertised in /sys/power/state. Note + * that it still may be impossible to enter given system sleep state if the + * conditions aren't right. + * There is the %suspend_valid_only_mem function available that can be + * assigned to this if the platform only supports mem sleep. + * + * @begin: Initialise a transition to given system sleep state. + * @begin() is executed right prior to suspending devices. The information + * conveyed to the platform code by @begin() should be disregarded by it as + * soon as @end() is executed. If @begin() fails (ie. returns nonzero), + * @prepare(), @enter() and @finish() will not be called by the PM core. + * This callback is optional. However, if it is implemented, the argument + * passed to @enter() is redundant and should be ignored. + * + * @prepare: Prepare the platform for entering the system sleep state indicated + * by @begin(). + * @prepare() is called right after devices have been suspended (ie. the + * appropriate .suspend() method has been executed for each device) and + * before the nonboot CPUs are disabled (it is executed with IRQs enabled). + * This callback is optional. It returns 0 on success or a negative + * error code otherwise, in which case the system cannot enter the desired + * sleep state (@enter() and @finish() will not be called in that case). + * + * @enter: Enter the system sleep state indicated by @begin() or represented by + * the argument if @begin() is not implemented. + * This callback is mandatory. It returns 0 on success or a negative + * error code otherwise, in which case the system cannot enter the desired + * sleep state. + * + * @finish: Called when the system has just left a sleep state, right after + * the nonboot CPUs have been enabled and before devices are resumed (it is + * executed with IRQs enabled). + * This callback is optional, but should be implemented by the platforms + * that implement @prepare(). If implemented, it is always called after + * @enter() (even if @enter() fails). + * + * @end: Called by the PM core right after resuming devices, to indicate to + * the platform that the system has returned to the working state or + * the transition to the sleep state has been aborted. + * This callback is optional, but should be implemented by the platforms + * that implement @begin(), but platforms implementing @begin() should + * also provide a @end() which cleans up transitions aborted before + * @enter(). + * + * @recover: Recover the platform from a suspend failure. + * Called by the PM core if the suspending of devices fails. + * This callback is optional and should only be implemented by platforms + * which require special recovery actions in that situation. + */ +struct platform_suspend_ops { + int (*valid)(suspend_state_t state); + int (*begin)(suspend_state_t state); + int (*prepare)(void); + int (*enter)(suspend_state_t state); + void (*finish)(void); + void (*end)(void); + void (*recover)(void); +}; + +#ifdef CONFIG_SUSPEND +/** + * suspend_set_ops - set platform dependent suspend operations + * @ops: The new suspend operations to set. + */ +extern void suspend_set_ops(struct platform_suspend_ops *ops); +extern int suspend_valid_only_mem(suspend_state_t state); + +/** + * arch_suspend_disable_irqs - disable IRQs for suspend + * + * Disables IRQs (in the default case). This is a weak symbol in the common + * code and thus allows architectures to override it if more needs to be + * done. Not called for suspend to disk. + */ +extern void arch_suspend_disable_irqs(void); + +/** + * arch_suspend_enable_irqs - enable IRQs after suspend + * + * Enables IRQs (in the default case). This is a weak symbol in the common + * code and thus allows architectures to override it if more needs to be + * done. Not called for suspend to disk. + */ +extern void arch_suspend_enable_irqs(void); + +extern int pm_suspend(suspend_state_t state); +#else /* !CONFIG_SUSPEND */ +#define suspend_valid_only_mem NULL + +static inline void suspend_set_ops(struct platform_suspend_ops *ops) {} +static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; } +#endif /* !CONFIG_SUSPEND */ + +/* struct pbe is used for creating lists of pages that should be restored + * atomically during the resume from disk, because the page frames they have + * occupied before the suspend are in use. + */ +struct pbe { + void *address; /* address of the copy */ + void *orig_address; /* original address of a page */ + struct pbe *next; +}; + +/* mm/page_alloc.c */ +extern void mark_free_pages(struct zone *zone); + +/** + * struct platform_hibernation_ops - hibernation platform support + * + * The methods in this structure allow a platform to carry out special + * operations required by it during a hibernation transition. + * + * All the methods below, except for @recover(), must be implemented. + * + * @begin: Tell the platform driver that we're starting hibernation. + * Called right after shrinking memory and before freezing devices. + * + * @end: Called by the PM core right after resuming devices, to indicate to + * the platform that the system has returned to the working state. + * + * @pre_snapshot: Prepare the platform for creating the hibernation image. + * Called right after devices have been frozen and before the nonboot + * CPUs are disabled (runs with IRQs on). + * + * @finish: Restore the previous state of the platform after the hibernation + * image has been created *or* put the platform into the normal operation + * mode after the hibernation (the same method is executed in both cases). + * Called right after the nonboot CPUs have been enabled and before + * thawing devices (runs with IRQs on). + * + * @prepare: Prepare the platform for entering the low power state. + * Called right after the hibernation image has been saved and before + * devices are prepared for entering the low power state. + * + * @enter: Put the system into the low power state after the hibernation image + * has been saved to disk. + * Called after the nonboot CPUs have been disabled and all of the low + * level devices have been shut down (runs with IRQs off). + * + * @leave: Perform the first stage of the cleanup after the system sleep state + * indicated by @set_target() has been left. + * Called right after the control has been passed from the boot kernel to + * the image kernel, before the nonboot CPUs are enabled and before devices + * are resumed. Executed with interrupts disabled. + * + * @pre_restore: Prepare system for the restoration from a hibernation image. + * Called right after devices have been frozen and before the nonboot + * CPUs are disabled (runs with IRQs on). + * + * @restore_cleanup: Clean up after a failing image restoration. + * Called right after the nonboot CPUs have been enabled and before + * thawing devices (runs with IRQs on). + * + * @recover: Recover the platform from a failure to suspend devices. + * Called by the PM core if the suspending of devices during hibernation + * fails. This callback is optional and should only be implemented by + * platforms which require special recovery actions in that situation. + */ +struct platform_hibernation_ops { + int (*begin)(void); + void (*end)(void); + int (*pre_snapshot)(void); + void (*finish)(void); + int (*prepare)(void); + int (*enter)(void); + void (*leave)(void); + int (*pre_restore)(void); + void (*restore_cleanup)(void); + void (*recover)(void); +}; + +#ifdef CONFIG_HIBERNATION +/* kernel/power/snapshot.c */ +extern void __register_nosave_region(unsigned long b, unsigned long e, int km); +static inline void __init register_nosave_region(unsigned long b, unsigned long e) +{ + __register_nosave_region(b, e, 0); +} +static inline void __init register_nosave_region_late(unsigned long b, unsigned long e) +{ + __register_nosave_region(b, e, 1); +} +extern int swsusp_page_is_forbidden(struct page *); +extern void swsusp_set_page_free(struct page *); +extern void swsusp_unset_page_free(struct page *); +extern unsigned long get_safe_page(gfp_t gfp_mask); + +extern void hibernation_set_ops(struct platform_hibernation_ops *ops); +extern int hibernate(void); +extern int hibernate_nvs_register(unsigned long start, unsigned long size); +extern int hibernate_nvs_alloc(void); +extern void hibernate_nvs_free(void); +extern void hibernate_nvs_save(void); +extern void hibernate_nvs_restore(void); +extern bool system_entering_hibernation(void); +#else /* CONFIG_HIBERNATION */ +static inline int swsusp_page_is_forbidden(struct page *p) { return 0; } +static inline void swsusp_set_page_free(struct page *p) {} +static inline void swsusp_unset_page_free(struct page *p) {} + +static inline void hibernation_set_ops(struct platform_hibernation_ops *ops) {} +static inline int hibernate(void) { return -ENOSYS; } +static inline int hibernate_nvs_register(unsigned long a, unsigned long b) +{ + return 0; +} +static inline int hibernate_nvs_alloc(void) { return 0; } +static inline void hibernate_nvs_free(void) {} +static inline void hibernate_nvs_save(void) {} +static inline void hibernate_nvs_restore(void) {} +static inline bool system_entering_hibernation(void) { return false; } +#endif /* CONFIG_HIBERNATION */ + +#ifdef CONFIG_PM_SLEEP +void save_processor_state(void); +void restore_processor_state(void); + +/* kernel/power/main.c */ +extern int register_pm_notifier(struct notifier_block *nb); +extern int unregister_pm_notifier(struct notifier_block *nb); + +#define pm_notifier(fn, pri) { \ + static struct notifier_block fn##_nb = \ + { .notifier_call = fn, .priority = pri }; \ + register_pm_notifier(&fn##_nb); \ +} +#else /* !CONFIG_PM_SLEEP */ + +static inline int register_pm_notifier(struct notifier_block *nb) +{ + return 0; +} + +static inline int unregister_pm_notifier(struct notifier_block *nb) +{ + return 0; +} + +#define pm_notifier(fn, pri) do { (void)(fn); } while (0) +#endif /* !CONFIG_PM_SLEEP */ + +#ifndef CONFIG_HIBERNATION +static inline void register_nosave_region(unsigned long b, unsigned long e) +{ +} +static inline void register_nosave_region_late(unsigned long b, unsigned long e) +{ +} +#endif + +extern struct mutex pm_mutex; + +#endif /* _LINUX_SUSPEND_H */ |